Re: Macintosh 12" RGB Display M1296G owners please help

['Keith Jamison' via Vintage Macs]

 Hi Mateusz,
I see a single label on the FB.
Three lines of text
CP334P03001(the reverse UR symbol) MSU1FSB01CM 91518T and a small five pointed 
star
I found three references to CP334P03001 - a flyback transformer.
APPLE HR 46097MACINTOSH HR 46097MITSUBISHI HR 46097

For MSU1FSB01
2015 LZ174D055T 123.456.7910 *  2052 MSU1FSB01 12.34.79.562015 LZ174D055T 
123.456.7910 *  2052 MSU1FSB01 12.34.79.56

on this page televisio_新浪博客 quite close to the bottom. The LZ174D055T reference 
may be a part number.

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televisio_新浪博客

televisio_新浪博客,televisio
 |

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So there may be a compatible part out there.
Cheers,
Keith


On Monday, 5 March 2018, 17:26:11 GMT, zgbapl  wrote:  
 
 Hi there,
I have replaced R920 to its nominal value and sure enough I'm getting 78V @80V 
test point. Close enough. Unfortunately no HV whatsoever. There's >100V on 
HOT's collector so it looks good. I didn't have much time to troubleshoot it 
further. Is there any marking on the flyback? You know, just in case...
Cheers,Mateusz

W dniu niedziela, 4 marca 2018 18:16:58 UTC+1 użytkownik zgbapl napisał:
Hi Keith,
>> Have you tested the expected voltages at the various test points on the 
>> circuit boards? 
sort of. I'm getting ~100V instead of expected 80V at R920 which is, as per 
your measurements, a little bit off. I will replace the 47k resistor with a 
proper 27k one and check the voltage again.
>> Also, you may have to test continuity between pads in case of hairline 
>> cracks in the tracks.
Yeah, that will be my step two if the resistor replacement fails.
Apart from that I'd like to hook up my scope to see some waveforms, but I don't 
have a separation transformer (yet) so that would be my last resort... I'm not 
giving up though.
W dniu niedziela, 4 marca 2018 14:23:43 UTC+1 użytkownik Mat Stalkman napisał:
 Hi Mateusz,
Sorry, been away from the emails for a few days.
I have tested the following resistors out of circuit on my European board. 
Colours are as per my board.
R523 - Brown-Red-Orange - 1-2-000 - Measured 11.7k R919 - Brown-Black-Orange - 
1-0-000 - Measured 9.7kR920 - Red-Violet-Orange - 2-7-000 - Measured 26.9k
Hope this helps,
Keith.
On Saturday, 3 March 2018, 14:55:15 GMT, zgbapl  wrote:  
 
 Hi Guys,
I managed to rebuild the board and despite my curiosity wants me to power this 
thing on immediately to see if it works, I'd like to check those last resistors 
to be sure that I won't damage the circuitry. Here it goes:
R523 - 12k, my guess was 22kR919 - 10k, my guess was 56kR920 - 47k, my guess 
was 27k
Please check them for me, and let's see if it powers up:) In the meantime I 
will clean the rest of wires, connectors etc. and start writing my story :) If 
you confirm those values I will publish my sheet where I have written down most 
of the parts (without inductors, transformers etc) and their values. The 
schematic is on its way.
Cheers,Mateusz

W dniu sobota, 24 lutego 2018 14:50:49 UTC+1 użytkownik Mat Stalkman napisał:
 Mateusz,
I have metered the following resistors, out of circuit.
R423 - Blue-Grey-Black-Red - 6-8-0-x10^2 - 68k - Measured 67.6k
R506 - Blue-Grey-Red - 6-8-x10^2 - 6.8k - Measured 6.85k
R419 - Brown-Red-Gold - 1-2-x10^-1 - 1.2R - Measured 1.3R
R511 - Brown-Black-Black - 1-0-x10^0 - 10R - Measured 9.9R
R514 - Brown-Black-Black - 1-0-x10^0 - 10R - Measured 9.9R
R526 - Brown-Red-Gold - 1-2-x10^-1 - 1.2R - Measured 1.3R
R911 - Printed 0.33R -  Measured 00.3R (I don't have a lower scale for 
additional decimal places)
Hope this helps ,
Cheers,
Keith
On Thursday, 22 February 2018, 19:10:23 GMT, zgbapl  wrote:  
 
 Hi Guys,
the main board is pretty much complete now. I'm only missing a few parts now. 
I'd like to ask you to double check those two resistors:
R423 - my initial guess (I don't remember if I measured it or read the stripes) 
was 6,8K, but you guys say it's 68KR506 - the other way round - in my sheet 
it's 68K, not 6,8K
Additionally I'm not 100% sure if I got those power resistors right:
R419, R526 - 1,2 ohmR511, R514 - 10 ohmR911 - 0,33 ohm
Hopefully I got it all right. Keep the fingers crossed.
Cheers,Mateusz
W dniu wtorek, 20 lutego 2018 21:59:16 UTC+1 użytkownik The One True Stickman 
napisał:
Yes, Keith also measured this one at 160K after I posted my initial list. 
Out-of-circuit test confirms 160K, so there's a triple-check!

On Tue, Feb 20, 2018 at 6:05 AM, zgbapl  wrote:

>> Typo - 86 makes no sense for R521, I think it must either be 76 or 16 ohm. 
I think I have measured this one and it's more like 160K 1%. Maybe you could 
measure it in-circuit? I will do the same with 160K resistor soldered in and 
compare the results. That's the biggest difference between my measurements and 
your readings so far, so it would be nice to double check it.

W dniu piątek, 2 lutego 2018 14:14:54 UTC+1 użytkownik The One True Stickman 
napisał:
Typo - 86 makes no sense for R521, I think it must either 

Re: Macintosh 12" RGB Display M1296G owners please help

[zgbapl]

Hi there,

I have replaced R920 to its nominal value and sure enough I'm getting 78V 
@80V test point. Close enough. Unfortunately no HV whatsoever. There's 
>100V on HOT's collector so it looks good. I didn't have much time to 
troubleshoot it further. Is there any marking on the flyback? You know, 
just in case...

Cheers,
Mateusz

W dniu niedziela, 4 marca 2018 18:16:58 UTC+1 użytkownik zgbapl napisał:
>
> Hi Keith,
>
> >> Have you tested the expected voltages at the various test points on the 
> circuit boards? 
>
> sort of. I'm getting ~100V instead of expected 80V at R920 which is, as 
> per your measurements, a little bit off. I will replace the 47k resistor 
> with a proper 27k one and check the voltage again.
>
> >> Also, you may have to test continuity between pads in case of hairline 
> cracks in the tracks.
>
> Yeah, that will be my step two if the resistor replacement fails.
>
> Apart from that I'd like to hook up my scope to see some waveforms, but I 
> don't have a separation transformer (yet) so that would be my last 
> resort... I'm not giving up though.
>
> W dniu niedziela, 4 marca 2018 14:23:43 UTC+1 użytkownik Mat Stalkman 
> napisał:
>>
>> Hi Mateusz,
>>
>> Sorry, been away from the emails for a few days.
>>
>> I have tested the following resistors out of circuit on my European 
>> board. Colours are as per my board.
>>
>> R523 - Brown-Red-Orange - 1-2-000 - Measured 11.7k 
>> R919 - Brown-Black-Orange - 1-0-000 - Measured 9.7k
>> R920 - Red-Violet-Orange - 2-7-000 - Measured 26.9k
>>
>> Hope this helps,
>>
>> Keith.
>>
>> On Saturday, 3 March 2018, 14:55:15 GMT, zgbapl  wrote: 
>>
>>
>> Hi Guys,
>>
>> I managed to rebuild the board and despite my curiosity wants me to power 
>> this thing on immediately to see if it works, I'd like to check those last 
>> resistors to be sure that I won't damage the circuitry. Here it goes:
>>
>> R523 - 12k, my guess was 22k
>> R919 - 10k, my guess was 56k
>> R920 - 47k, my guess was 27k
>>
>> Please check them for me, and let's see if it powers up:) In the meantime 
>> I will clean the rest of wires, connectors etc. and start writing my story 
>> :) If you confirm those values I will publish my sheet where I have written 
>> down most of the parts (without inductors, transformers etc) and their 
>> values. The schematic is on its way.
>>
>> Cheers,
>> Mateusz
>>
>> W dniu sobota, 24 lutego 2018 14:50:49 UTC+1 użytkownik Mat Stalkman 
>> napisał:
>>
>> Mateusz,
>>
>> I have metered the following resistors, out of circuit.
>>
>> R423 - Blue-Grey-Black-Red - 6-8-0-x10^2 - 68k - Measured 67.6k
>>
>> R506 - Blue-Grey-Red - 6-8-x10^2 - 6.8k - Measured 6.85k
>>
>> R419 - Brown-Red-Gold - 1-2-x10^-1 - 1.2R - Measured 1.3R
>>
>> R511 - Brown-Black-Black - 1-0-x10^0 - 10R - Measured 9.9R
>>
>> R514 - Brown-Black-Black - 1-0-x10^0 - 10R - Measured 9.9R
>>
>> R526 - Brown-Red-Gold - 1-2-x10^-1 - 1.2R - Measured 1.3R
>>
>> R911 - Printed 0.33R -  Measured 00.3R (I don't have a lower scale for 
>> additional decimal places)
>>
>> Hope this helps ,
>>
>> Cheers,
>>
>> Keith
>>
>> On Thursday, 22 February 2018, 19:10:23 GMT, zgbapl  wrote: 
>>
>>
>> Hi Guys,
>>
>> the main board is pretty much complete now. I'm only missing a few parts 
>> now. I'd like to ask you to double check those two resistors:
>>
>> R423 - my initial guess (I don't remember if I measured it or read the 
>> stripes) was 6,8K, but you guys say it's 68K
>> R506 - the other way round - in my sheet it's 68K, not 6,8K
>>
>> Additionally I'm not 100% sure if I got those power resistors right:
>>
>> R419, R526 - 1,2 ohm
>> R511, R514 - 10 ohm
>> R911 - 0,33 ohm
>>
>> Hopefully I got it all right. Keep the fingers crossed.
>>
>> Cheers,
>> Mateusz
>>
>> W dniu wtorek, 20 lutego 2018 21:59:16 UTC+1 użytkownik The One True 
>> Stickman napisał:
>>
>> Yes, Keith also measured this one at 160K after I posted my initial list. 
>> Out-of-circuit test confirms 160K, so there's a triple-check!
>>
>> On Tue, Feb 20, 2018 at 6:05 AM, zgbapl  wrote:
>>
>> >> Typo - 86 makes no sense for R521, I think it must either be 76 or 16 
>> ohm. 
>>
>> I think I have measured this one and it's more like 160K 1%. Maybe you 
>> could measure it in-circuit? I will do the same with 160K resistor soldered 
>> in and compare the results. That's the biggest difference between my 
>> measurements and your readings so far, so it would be nice to double check 
>> it.
>>
>> W dniu piątek, 2 lutego 2018 14:14:54 UTC+1 użytkownik The One True 
>> Stickman napisał:
>>
>> Typo - 86 makes no sense for R521, I think it must either be 76 or 16 
>> ohm. 
>>
>> On Tue, Jan 30, 2018 at 7:58 PM,  wrote:
>>
>> Added to the folder - in case colors aren't visible, here are resistor 
>> codes & values. All appear to be 1/8W carbon 5% except R521 & R423, which 
>> look like a 1% metal film:
>>
>> R919 10K (Brown Black Orange)
>> R920 47K (Red Violet Orange)
>> R521 86ohm?  (Violet 

Re: Macintosh 12" RGB Display M1296G owners please help

[zgbapl]

Hi Keith,

>> Have you tested the expected voltages at the various test points on the 
circuit boards? 

sort of. I'm getting ~100V instead of expected 80V at R920 which is, as per 
your measurements, a little bit off. I will replace the 47k resistor with a 
proper 27k one and check the voltage again.

>> Also, you may have to test continuity between pads in case of hairline 
cracks in the tracks.

Yeah, that will be my step two if the resistor replacement fails.

Apart from that I'd like to hook up my scope to see some waveforms, but I 
don't have a separation transformer (yet) so that would be my last 
resort... I'm not giving up though.

W dniu niedziela, 4 marca 2018 14:23:43 UTC+1 użytkownik Mat Stalkman 
napisał:
>
> Hi Mateusz,
>
> Sorry, been away from the emails for a few days.
>
> I have tested the following resistors out of circuit on my European board. 
> Colours are as per my board.
>
> R523 - Brown-Red-Orange - 1-2-000 - Measured 11.7k 
> R919 - Brown-Black-Orange - 1-0-000 - Measured 9.7k
> R920 - Red-Violet-Orange - 2-7-000 - Measured 26.9k
>
> Hope this helps,
>
> Keith.
>
> On Saturday, 3 March 2018, 14:55:15 GMT, zgbapl  
> wrote: 
>
>
> Hi Guys,
>
> I managed to rebuild the board and despite my curiosity wants me to power 
> this thing on immediately to see if it works, I'd like to check those last 
> resistors to be sure that I won't damage the circuitry. Here it goes:
>
> R523 - 12k, my guess was 22k
> R919 - 10k, my guess was 56k
> R920 - 47k, my guess was 27k
>
> Please check them for me, and let's see if it powers up:) In the meantime 
> I will clean the rest of wires, connectors etc. and start writing my story 
> :) If you confirm those values I will publish my sheet where I have written 
> down most of the parts (without inductors, transformers etc) and their 
> values. The schematic is on its way.
>
> Cheers,
> Mateusz
>
> W dniu sobota, 24 lutego 2018 14:50:49 UTC+1 użytkownik Mat Stalkman 
> napisał:
>
> Mateusz,
>
> I have metered the following resistors, out of circuit.
>
> R423 - Blue-Grey-Black-Red - 6-8-0-x10^2 - 68k - Measured 67.6k
>
> R506 - Blue-Grey-Red - 6-8-x10^2 - 6.8k - Measured 6.85k
>
> R419 - Brown-Red-Gold - 1-2-x10^-1 - 1.2R - Measured 1.3R
>
> R511 - Brown-Black-Black - 1-0-x10^0 - 10R - Measured 9.9R
>
> R514 - Brown-Black-Black - 1-0-x10^0 - 10R - Measured 9.9R
>
> R526 - Brown-Red-Gold - 1-2-x10^-1 - 1.2R - Measured 1.3R
>
> R911 - Printed 0.33R -  Measured 00.3R (I don't have a lower scale for 
> additional decimal places)
>
> Hope this helps ,
>
> Cheers,
>
> Keith
>
> On Thursday, 22 February 2018, 19:10:23 GMT, zgbapl  wrote: 
>
>
> Hi Guys,
>
> the main board is pretty much complete now. I'm only missing a few parts 
> now. I'd like to ask you to double check those two resistors:
>
> R423 - my initial guess (I don't remember if I measured it or read the 
> stripes) was 6,8K, but you guys say it's 68K
> R506 - the other way round - in my sheet it's 68K, not 6,8K
>
> Additionally I'm not 100% sure if I got those power resistors right:
>
> R419, R526 - 1,2 ohm
> R511, R514 - 10 ohm
> R911 - 0,33 ohm
>
> Hopefully I got it all right. Keep the fingers crossed.
>
> Cheers,
> Mateusz
>
> W dniu wtorek, 20 lutego 2018 21:59:16 UTC+1 użytkownik The One True 
> Stickman napisał:
>
> Yes, Keith also measured this one at 160K after I posted my initial list. 
> Out-of-circuit test confirms 160K, so there's a triple-check!
>
> On Tue, Feb 20, 2018 at 6:05 AM, zgbapl  wrote:
>
> >> Typo - 86 makes no sense for R521, I think it must either be 76 or 16 
> ohm. 
>
> I think I have measured this one and it's more like 160K 1%. Maybe you 
> could measure it in-circuit? I will do the same with 160K resistor soldered 
> in and compare the results. That's the biggest difference between my 
> measurements and your readings so far, so it would be nice to double check 
> it.
>
> W dniu piątek, 2 lutego 2018 14:14:54 UTC+1 użytkownik The One True 
> Stickman napisał:
>
> Typo - 86 makes no sense for R521, I think it must either be 76 or 16 ohm. 
>
> On Tue, Jan 30, 2018 at 7:58 PM,  wrote:
>
> Added to the folder - in case colors aren't visible, here are resistor 
> codes & values. All appear to be 1/8W carbon 5% except R521 & R423, which 
> look like a 1% metal film:
>
> R919 10K (Brown Black Orange)
> R920 47K (Red Violet Orange)
> R521 86ohm?  (Violet Blue Black Gold 1% metal film - this one is hard to 
> read)
> R523 12K (Brown Red Orange)
> R423 68K (Blue Grey Black Red 1% metal film)
> R506 6K8 (Blue Grey Red)
>
> Let me know if you need anything else, I didn't have more than a few 
> minutes today.
>
> I'd bet the only real difference between the US & European model is in the 
> line voltage power supply side of the board and the rest is pretty similar. 
> There's a photo of the entire board and one of just the signals/HV side.
> For future searchers: I will upload these all to flickr or imgur as well 
> 

Re: Macintosh 12" RGB Display M1296G owners please help

['Keith Jamison' via Vintage Macs]

 Hi Mateusz,
Sorry, been away from the emails for a few days.
I have tested the following resistors out of circuit on my European board. 
Colours are as per my board.
R523 - Brown-Red-Orange - 1-2-000 - Measured 11.7k R919 - Brown-Black-Orange - 
1-0-000 - Measured 9.7kR920 - Red-Violet-Orange - 2-7-000 - Measured 26.9k
Hope this helps,
Keith.
On Saturday, 3 March 2018, 14:55:15 GMT, zgbapl  wrote:  
 
 Hi Guys,
I managed to rebuild the board and despite my curiosity wants me to power this 
thing on immediately to see if it works, I'd like to check those last resistors 
to be sure that I won't damage the circuitry. Here it goes:
R523 - 12k, my guess was 22kR919 - 10k, my guess was 56kR920 - 47k, my guess 
was 27k
Please check them for me, and let's see if it powers up:) In the meantime I 
will clean the rest of wires, connectors etc. and start writing my story :) If 
you confirm those values I will publish my sheet where I have written down most 
of the parts (without inductors, transformers etc) and their values. The 
schematic is on its way.
Cheers,Mateusz

W dniu sobota, 24 lutego 2018 14:50:49 UTC+1 użytkownik Mat Stalkman napisał:
 Mateusz,
I have metered the following resistors, out of circuit.
R423 - Blue-Grey-Black-Red - 6-8-0-x10^2 - 68k - Measured 67.6k
R506 - Blue-Grey-Red - 6-8-x10^2 - 6.8k - Measured 6.85k
R419 - Brown-Red-Gold - 1-2-x10^-1 - 1.2R - Measured 1.3R
R511 - Brown-Black-Black - 1-0-x10^0 - 10R - Measured 9.9R
R514 - Brown-Black-Black - 1-0-x10^0 - 10R - Measured 9.9R
R526 - Brown-Red-Gold - 1-2-x10^-1 - 1.2R - Measured 1.3R
R911 - Printed 0.33R -  Measured 00.3R (I don't have a lower scale for 
additional decimal places)
Hope this helps ,
Cheers,
Keith
On Thursday, 22 February 2018, 19:10:23 GMT, zgbapl  wrote:  
 
 Hi Guys,
the main board is pretty much complete now. I'm only missing a few parts now. 
I'd like to ask you to double check those two resistors:
R423 - my initial guess (I don't remember if I measured it or read the stripes) 
was 6,8K, but you guys say it's 68KR506 - the other way round - in my sheet 
it's 68K, not 6,8K
Additionally I'm not 100% sure if I got those power resistors right:
R419, R526 - 1,2 ohmR511, R514 - 10 ohmR911 - 0,33 ohm
Hopefully I got it all right. Keep the fingers crossed.
Cheers,Mateusz
W dniu wtorek, 20 lutego 2018 21:59:16 UTC+1 użytkownik The One True Stickman 
napisał:
Yes, Keith also measured this one at 160K after I posted my initial list. 
Out-of-circuit test confirms 160K, so there's a triple-check!

On Tue, Feb 20, 2018 at 6:05 AM, zgbapl  wrote:

>> Typo - 86 makes no sense for R521, I think it must either be 76 or 16 ohm. 
I think I have measured this one and it's more like 160K 1%. Maybe you could 
measure it in-circuit? I will do the same with 160K resistor soldered in and 
compare the results. That's the biggest difference between my measurements and 
your readings so far, so it would be nice to double check it.

W dniu piątek, 2 lutego 2018 14:14:54 UTC+1 użytkownik The One True Stickman 
napisał:
Typo - 86 makes no sense for R521, I think it must either be 76 or 16 ohm. 

On Tue, Jan 30, 2018 at 7:58 PM,  wrote:

Added to the folder - in case colors aren't visible, here are resistor codes & 
values. All appear to be 1/8W carbon 5% except R521 & R423, which look like a 
1% metal film:

R919 10K (Brown Black Orange)
R920 47K (Red Violet Orange)
R521 86ohm?  (Violet Blue Black Gold 1% metal film - this one is hard to read)
R523 12K (Brown Red Orange)
R423 68K (Blue Grey Black Red 1% metal film)
R506 6K8 (Blue Grey Red)

Let me know if you need anything else, I didn't have more than a few minutes 
today.

I'd bet the only real difference between the US & European model is in the line 
voltage power supply side of the board and the rest is pretty similar. There's 
a photo of the entire board and one of just the signals/HV side.
For future searchers: I will upload these all to flickr or imgur as well and 
post the link, as I won't keep them in dropbox forever.  



On Tue, Jan 30, 2018 at 1:57 AM, zgbapl  wrote:

>>  is yours also a US model or an international?

It's an european one. Seems like there are some differences between our models. 
Still, I'd like to see a few close shots of your board.
So if you could take a pic of the following elements, that would be great. To 
make it easier, I'm gonna tell you rough directions (my board is facing the 
flyback down, so the CRT is on my right hand side) and their orientation.
R919, R920 - two small ones, center right (under the CRT neck) in close 
proximity of Q905 transistor (with a big heat sink) and two blue disc caps; 
verticalR521 - near the flyback transformer, slightly above and on the left; 
horizontalR523 - slightly lower than the previous one; horizontalR423 - left to 
the J501 (vertical connector, lots of wires); horizontalR506 - far bottom left, 
above H-hold pot; horizontal
Those are the 

Re: Macintosh 12" RGB Display M1296G owners please help

['Keith Jamison' via Vintage Macs]

 Mateusz,
Keep at it. Have you tested the expected voltages at the various test points on 
the circuit boards? 
Also, you may have to test continuity between pads in case of hairline cracks 
in the tracks.

Keith
On Saturday, 3 March 2018, 19:24:54 GMT, zgbapl  wrote:  
 
 OK, if you didn't check those resistors yet - don't bother. I couldn't resist 
and turned the monitor on. Sadly, it doesn't work. After powering it up the 
degaussing coil maks its cycle and then only the faint noise is to be heard 
(vertical sweep?). Right now my guess is that the flyback transformer doesn't 
generate the high voltage, cause there's no "pop" when I try to discharge the 
crt. Well, looks like more troubleshooting to me...

W dniu sobota, 3 marca 2018 15:55:11 UTC+1 użytkownik zgbapl napisał:
Hi Guys,
I managed to rebuild the board and despite my curiosity wants me to power this 
thing on immediately to see if it works, I'd like to check those last resistors 
to be sure that I won't damage the circuitry. Here it goes:
R523 - 12k, my guess was 22kR919 - 10k, my guess was 56kR920 - 47k, my guess 
was 27k
Please check them for me, and let's see if it powers up:) In the meantime I 
will clean the rest of wires, connectors etc. and start writing my story :) If 
you confirm those values I will publish my sheet where I have written down most 
of the parts (without inductors, transformers etc) and their values. The 
schematic is on its way.
Cheers,Mateusz

W dniu sobota, 24 lutego 2018 14:50:49 UTC+1 użytkownik Mat Stalkman napisał:
 Mateusz,
I have metered the following resistors, out of circuit.
R423 - Blue-Grey-Black-Red - 6-8-0-x10^2 - 68k - Measured 67.6k
R506 - Blue-Grey-Red - 6-8-x10^2 - 6.8k - Measured 6.85k
R419 - Brown-Red-Gold - 1-2-x10^-1 - 1.2R - Measured 1.3R
R511 - Brown-Black-Black - 1-0-x10^0 - 10R - Measured 9.9R
R514 - Brown-Black-Black - 1-0-x10^0 - 10R - Measured 9.9R
R526 - Brown-Red-Gold - 1-2-x10^-1 - 1.2R - Measured 1.3R
R911 - Printed 0.33R -  Measured 00.3R (I don't have a lower scale for 
additional decimal places)
Hope this helps ,
Cheers,
Keith
On Thursday, 22 February 2018, 19:10:23 GMT, zgbapl  wrote:  
 
 Hi Guys,
the main board is pretty much complete now. I'm only missing a few parts now. 
I'd like to ask you to double check those two resistors:
R423 - my initial guess (I don't remember if I measured it or read the stripes) 
was 6,8K, but you guys say it's 68KR506 - the other way round - in my sheet 
it's 68K, not 6,8K
Additionally I'm not 100% sure if I got those power resistors right:
R419, R526 - 1,2 ohmR511, R514 - 10 ohmR911 - 0,33 ohm
Hopefully I got it all right. Keep the fingers crossed.
Cheers,Mateusz
W dniu wtorek, 20 lutego 2018 21:59:16 UTC+1 użytkownik The One True Stickman 
napisał:
Yes, Keith also measured this one at 160K after I posted my initial list. 
Out-of-circuit test confirms 160K, so there's a triple-check!

On Tue, Feb 20, 2018 at 6:05 AM, zgbapl  wrote:

>> Typo - 86 makes no sense for R521, I think it must either be 76 or 16 ohm. 
I think I have measured this one and it's more like 160K 1%. Maybe you could 
measure it in-circuit? I will do the same with 160K resistor soldered in and 
compare the results. That's the biggest difference between my measurements and 
your readings so far, so it would be nice to double check it.

W dniu piątek, 2 lutego 2018 14:14:54 UTC+1 użytkownik The One True Stickman 
napisał:
Typo - 86 makes no sense for R521, I think it must either be 76 or 16 ohm. 

On Tue, Jan 30, 2018 at 7:58 PM,  wrote:

Added to the folder - in case colors aren't visible, here are resistor codes & 
values. All appear to be 1/8W carbon 5% except R521 & R423, which look like a 
1% metal film:

R919 10K (Brown Black Orange)
R920 47K (Red Violet Orange)
R521 86ohm?  (Violet Blue Black Gold 1% metal film - this one is hard to read)
R523 12K (Brown Red Orange)
R423 68K (Blue Grey Black Red 1% metal film)
R506 6K8 (Blue Grey Red)

Let me know if you need anything else, I didn't have more than a few minutes 
today.

I'd bet the only real difference between the US & European model is in the line 
voltage power supply side of the board and the rest is pretty similar. There's 
a photo of the entire board and one of just the signals/HV side.
For future searchers: I will upload these all to flickr or imgur as well and 
post the link, as I won't keep them in dropbox forever.  



On Tue, Jan 30, 2018 at 1:57 AM, zgbapl  wrote:

>>  is yours also a US model or an international?

It's an european one. Seems like there are some differences between our models. 
Still, I'd like to see a few close shots of your board.
So if you could take a pic of the following elements, that would be great. To 
make it easier, I'm gonna tell you rough directions (my board is facing the 
flyback down, so the CRT is on my right hand side) and their orientation.
R919, R920 - two small ones, center right (under the CRT 

Re: Macintosh 12" RGB Display M1296G owners please help

[zgbapl]

OK, if you didn't check those resistors yet - don't bother. I couldn't 
resist and turned the monitor on. Sadly, it doesn't work. After powering it 
up the degaussing coil maks its cycle and then only the faint noise is to 
be heard (vertical sweep?). Right now my guess is that the flyback 
transformer doesn't generate the high voltage, cause there's no "pop" when 
I try to discharge the crt. Well, looks like more troubleshooting to me...

W dniu sobota, 3 marca 2018 15:55:11 UTC+1 użytkownik zgbapl napisał:
>
> Hi Guys,
>
> I managed to rebuild the board and despite my curiosity wants me to power 
> this thing on immediately to see if it works, I'd like to check those last 
> resistors to be sure that I won't damage the circuitry. Here it goes:
>
> R523 - 12k, my guess was 22k
> R919 - 10k, my guess was 56k
> R920 - 47k, my guess was 27k
>
> Please check them for me, and let's see if it powers up:) In the meantime 
> I will clean the rest of wires, connectors etc. and start writing my story 
> :) If you confirm those values I will publish my sheet where I have written 
> down most of the parts (without inductors, transformers etc) and their 
> values. The schematic is on its way.
>
> Cheers,
> Mateusz
>
> W dniu sobota, 24 lutego 2018 14:50:49 UTC+1 użytkownik Mat Stalkman 
> napisał:
>>
>> Mateusz,
>>
>> I have metered the following resistors, out of circuit.
>>
>> R423 - Blue-Grey-Black-Red - 6-8-0-x10^2 - 68k - Measured 67.6k
>>
>> R506 - Blue-Grey-Red - 6-8-x10^2 - 6.8k - Measured 6.85k
>>
>> R419 - Brown-Red-Gold - 1-2-x10^-1 - 1.2R - Measured 1.3R
>>
>> R511 - Brown-Black-Black - 1-0-x10^0 - 10R - Measured 9.9R
>>
>> R514 - Brown-Black-Black - 1-0-x10^0 - 10R - Measured 9.9R
>>
>> R526 - Brown-Red-Gold - 1-2-x10^-1 - 1.2R - Measured 1.3R
>>
>> R911 - Printed 0.33R -  Measured 00.3R (I don't have a lower scale for 
>> additional decimal places)
>>
>> Hope this helps ,
>>
>> Cheers,
>>
>> Keith
>>
>> On Thursday, 22 February 2018, 19:10:23 GMT, zgbapl  wrote: 
>>
>>
>> Hi Guys,
>>
>> the main board is pretty much complete now. I'm only missing a few parts 
>> now. I'd like to ask you to double check those two resistors:
>>
>> R423 - my initial guess (I don't remember if I measured it or read the 
>> stripes) was 6,8K, but you guys say it's 68K
>> R506 - the other way round - in my sheet it's 68K, not 6,8K
>>
>> Additionally I'm not 100% sure if I got those power resistors right:
>>
>> R419, R526 - 1,2 ohm
>> R511, R514 - 10 ohm
>> R911 - 0,33 ohm
>>
>> Hopefully I got it all right. Keep the fingers crossed.
>>
>> Cheers,
>> Mateusz
>>
>> W dniu wtorek, 20 lutego 2018 21:59:16 UTC+1 użytkownik The One True 
>> Stickman napisał:
>>
>> Yes, Keith also measured this one at 160K after I posted my initial list. 
>> Out-of-circuit test confirms 160K, so there's a triple-check!
>>
>> On Tue, Feb 20, 2018 at 6:05 AM, zgbapl  wrote:
>>
>> >> Typo - 86 makes no sense for R521, I think it must either be 76 or 16 
>> ohm. 
>>
>> I think I have measured this one and it's more like 160K 1%. Maybe you 
>> could measure it in-circuit? I will do the same with 160K resistor soldered 
>> in and compare the results. That's the biggest difference between my 
>> measurements and your readings so far, so it would be nice to double check 
>> it.
>>
>> W dniu piątek, 2 lutego 2018 14:14:54 UTC+1 użytkownik The One True 
>> Stickman napisał:
>>
>> Typo - 86 makes no sense for R521, I think it must either be 76 or 16 
>> ohm. 
>>
>> On Tue, Jan 30, 2018 at 7:58 PM,  wrote:
>>
>> Added to the folder - in case colors aren't visible, here are resistor 
>> codes & values. All appear to be 1/8W carbon 5% except R521 & R423, which 
>> look like a 1% metal film:
>>
>> R919 10K (Brown Black Orange)
>> R920 47K (Red Violet Orange)
>> R521 86ohm?  (Violet Blue Black Gold 1% metal film - this one is hard to 
>> read)
>> R523 12K (Brown Red Orange)
>> R423 68K (Blue Grey Black Red 1% metal film)
>> R506 6K8 (Blue Grey Red)
>>
>> Let me know if you need anything else, I didn't have more than a few 
>> minutes today.
>>
>> I'd bet the only real difference between the US & European model is in 
>> the line voltage power supply side of the board and the rest is pretty 
>> similar. There's a photo of the entire board and one of just the signals/HV 
>> side.
>> For future searchers: I will upload these all to flickr or imgur as well 
>> and post the link, as I won't keep them in dropbox forever.  
>>
>>
>>
>> On Tue, Jan 30, 2018 at 1:57 AM, zgbapl  wrote:
>>
>> >>  is yours also a US model or an international?
>>
>> It's an european one. Seems like there are some differences between our 
>> models. Still, I'd like to see a few close shots of your board.
>>
>> So if you could take a pic of the following elements, that would be 
>> great. To make it easier, I'm gonna tell you rough directions (my board is 
>> facing the flyback down, so the CRT is on my right hand side) and their 
>> 

Re: Macintosh 12" RGB Display M1296G owners please help

[zgbapl]

Hi Guys,

I managed to rebuild the board and despite my curiosity wants me to power 
this thing on immediately to see if it works, I'd like to check those last 
resistors to be sure that I won't damage the circuitry. Here it goes:

R523 - 12k, my guess was 22k
R919 - 10k, my guess was 56k
R920 - 47k, my guess was 27k

Please check them for me, and let's see if it powers up:) In the meantime I 
will clean the rest of wires, connectors etc. and start writing my story :) 
If you confirm those values I will publish my sheet where I have written 
down most of the parts (without inductors, transformers etc) and their 
values. The schematic is on its way.

Cheers,
Mateusz

W dniu sobota, 24 lutego 2018 14:50:49 UTC+1 użytkownik Mat Stalkman 
napisał:
>
> Mateusz,
>
> I have metered the following resistors, out of circuit.
>
> R423 - Blue-Grey-Black-Red - 6-8-0-x10^2 - 68k - Measured 67.6k
>
> R506 - Blue-Grey-Red - 6-8-x10^2 - 6.8k - Measured 6.85k
>
> R419 - Brown-Red-Gold - 1-2-x10^-1 - 1.2R - Measured 1.3R
>
> R511 - Brown-Black-Black - 1-0-x10^0 - 10R - Measured 9.9R
>
> R514 - Brown-Black-Black - 1-0-x10^0 - 10R - Measured 9.9R
>
> R526 - Brown-Red-Gold - 1-2-x10^-1 - 1.2R - Measured 1.3R
>
> R911 - Printed 0.33R -  Measured 00.3R (I don't have a lower scale for 
> additional decimal places)
>
> Hope this helps ,
>
> Cheers,
>
> Keith
>
> On Thursday, 22 February 2018, 19:10:23 GMT, zgbapl  > wrote: 
>
>
> Hi Guys,
>
> the main board is pretty much complete now. I'm only missing a few parts 
> now. I'd like to ask you to double check those two resistors:
>
> R423 - my initial guess (I don't remember if I measured it or read the 
> stripes) was 6,8K, but you guys say it's 68K
> R506 - the other way round - in my sheet it's 68K, not 6,8K
>
> Additionally I'm not 100% sure if I got those power resistors right:
>
> R419, R526 - 1,2 ohm
> R511, R514 - 10 ohm
> R911 - 0,33 ohm
>
> Hopefully I got it all right. Keep the fingers crossed.
>
> Cheers,
> Mateusz
>
> W dniu wtorek, 20 lutego 2018 21:59:16 UTC+1 użytkownik The One True 
> Stickman napisał:
>
> Yes, Keith also measured this one at 160K after I posted my initial list. 
> Out-of-circuit test confirms 160K, so there's a triple-check!
>
> On Tue, Feb 20, 2018 at 6:05 AM, zgbapl  wrote:
>
> >> Typo - 86 makes no sense for R521, I think it must either be 76 or 16 
> ohm. 
>
> I think I have measured this one and it's more like 160K 1%. Maybe you 
> could measure it in-circuit? I will do the same with 160K resistor soldered 
> in and compare the results. That's the biggest difference between my 
> measurements and your readings so far, so it would be nice to double check 
> it.
>
> W dniu piątek, 2 lutego 2018 14:14:54 UTC+1 użytkownik The One True 
> Stickman napisał:
>
> Typo - 86 makes no sense for R521, I think it must either be 76 or 16 ohm. 
>
> On Tue, Jan 30, 2018 at 7:58 PM,  wrote:
>
> Added to the folder - in case colors aren't visible, here are resistor 
> codes & values. All appear to be 1/8W carbon 5% except R521 & R423, which 
> look like a 1% metal film:
>
> R919 10K (Brown Black Orange)
> R920 47K (Red Violet Orange)
> R521 86ohm?  (Violet Blue Black Gold 1% metal film - this one is hard to 
> read)
> R523 12K (Brown Red Orange)
> R423 68K (Blue Grey Black Red 1% metal film)
> R506 6K8 (Blue Grey Red)
>
> Let me know if you need anything else, I didn't have more than a few 
> minutes today.
>
> I'd bet the only real difference between the US & European model is in the 
> line voltage power supply side of the board and the rest is pretty similar. 
> There's a photo of the entire board and one of just the signals/HV side.
> For future searchers: I will upload these all to flickr or imgur as well 
> and post the link, as I won't keep them in dropbox forever.  
>
>
>
> On Tue, Jan 30, 2018 at 1:57 AM, zgbapl  wrote:
>
> >>  is yours also a US model or an international?
>
> It's an european one. Seems like there are some differences between our 
> models. Still, I'd like to see a few close shots of your board.
>
> So if you could take a pic of the following elements, that would be great. 
> To make it easier, I'm gonna tell you rough directions (my board is facing 
> the flyback down, so the CRT is on my right hand side) and their 
> orientation.
>
> R919, R920 - two small ones, center right (under the CRT neck) in close 
> proximity of Q905 transistor (with a big heat sink) and two blue disc caps; 
> vertical
> R521 - near the flyback transformer, slightly above and on the left; 
> horizontal
> R523 - slightly lower than the previous one; horizontal
> R423 - left to the J501 (vertical connector, lots of wires); horizontal
> R506 - far bottom left, above H-hold pot; horizontal
>
> Those are the troublesome ones. Please take a picture of the underside of 
> the board - even if they are slightly different, I should be able to figure 
> out the differences by looking at the connections.
>

Re: Macintosh 12" RGB Display M1296G owners please help

['Keith Jamison' via Vintage Macs]

 Mateusz,
I have metered the following resistors, out of circuit.
R423 - Blue-Grey-Black-Red - 6-8-0-x10^2 - 68k - Measured 67.6k
R506 - Blue-Grey-Red - 6-8-x10^2 - 6.8k - Measured 6.85k
R419 - Brown-Red-Gold - 1-2-x10^-1 - 1.2R - Measured 1.3R
R511 - Brown-Black-Black - 1-0-x10^0 - 10R - Measured 9.9R
R514 - Brown-Black-Black - 1-0-x10^0 - 10R - Measured 9.9R
R526 - Brown-Red-Gold - 1-2-x10^-1 - 1.2R - Measured 1.3R
R911 - Printed 0.33R -  Measured 00.3R (I don't have a lower scale for 
additional decimal places)
Hope this helps ,
Cheers,
Keith
On Thursday, 22 February 2018, 19:10:23 GMT, zgbapl  wrote:  
 
 Hi Guys,
the main board is pretty much complete now. I'm only missing a few parts now. 
I'd like to ask you to double check those two resistors:
R423 - my initial guess (I don't remember if I measured it or read the stripes) 
was 6,8K, but you guys say it's 68KR506 - the other way round - in my sheet 
it's 68K, not 6,8K
Additionally I'm not 100% sure if I got those power resistors right:
R419, R526 - 1,2 ohmR511, R514 - 10 ohmR911 - 0,33 ohm
Hopefully I got it all right. Keep the fingers crossed.
Cheers,Mateusz
W dniu wtorek, 20 lutego 2018 21:59:16 UTC+1 użytkownik The One True Stickman 
napisał:
Yes, Keith also measured this one at 160K after I posted my initial list. 
Out-of-circuit test confirms 160K, so there's a triple-check!

On Tue, Feb 20, 2018 at 6:05 AM, zgbapl  wrote:

>> Typo - 86 makes no sense for R521, I think it must either be 76 or 16 ohm. 
I think I have measured this one and it's more like 160K 1%. Maybe you could 
measure it in-circuit? I will do the same with 160K resistor soldered in and 
compare the results. That's the biggest difference between my measurements and 
your readings so far, so it would be nice to double check it.

W dniu piątek, 2 lutego 2018 14:14:54 UTC+1 użytkownik The One True Stickman 
napisał:
Typo - 86 makes no sense for R521, I think it must either be 76 or 16 ohm. 

On Tue, Jan 30, 2018 at 7:58 PM,  wrote:

Added to the folder - in case colors aren't visible, here are resistor codes & 
values. All appear to be 1/8W carbon 5% except R521 & R423, which look like a 
1% metal film:

R919 10K (Brown Black Orange)
R920 47K (Red Violet Orange)
R521 86ohm?  (Violet Blue Black Gold 1% metal film - this one is hard to read)
R523 12K (Brown Red Orange)
R423 68K (Blue Grey Black Red 1% metal film)
R506 6K8 (Blue Grey Red)

Let me know if you need anything else, I didn't have more than a few minutes 
today.

I'd bet the only real difference between the US & European model is in the line 
voltage power supply side of the board and the rest is pretty similar. There's 
a photo of the entire board and one of just the signals/HV side.
For future searchers: I will upload these all to flickr or imgur as well and 
post the link, as I won't keep them in dropbox forever.  



On Tue, Jan 30, 2018 at 1:57 AM, zgbapl  wrote:

>>  is yours also a US model or an international?

It's an european one. Seems like there are some differences between our models. 
Still, I'd like to see a few close shots of your board.
So if you could take a pic of the following elements, that would be great. To 
make it easier, I'm gonna tell you rough directions (my board is facing the 
flyback down, so the CRT is on my right hand side) and their orientation.
R919, R920 - two small ones, center right (under the CRT neck) in close 
proximity of Q905 transistor (with a big heat sink) and two blue disc caps; 
verticalR521 - near the flyback transformer, slightly above and on the left; 
horizontalR523 - slightly lower than the previous one; horizontalR423 - left to 
the J501 (vertical connector, lots of wires); horizontalR506 - far bottom left, 
above H-hold pot; horizontal
Those are the troublesome ones. Please take a picture of the underside of the 
board - even if they are slightly different, I should be able to figure out the 
differences by looking at the connections.
Many thanks.Mateusz
W dniu wtorek, 30 stycznia 2018 00:19:06 UTC+1 użytkownik The One True Stickman 
napisał:
Mine is an M1296 110V/60Hz US model, no G suffix - is yours also a US model or 
an international? Some photos linked below, I can pull the boards out if 
needed.  

https://www.dropbox.com/sh/ 9s390k8gcva62e4/ AABptFdkwVknxSDRcH_zyi40a?dl=0

On Mon, Jan 29, 2018 at 8:49 AM, zgbapl  wrote:

Oh, that would be great. If you don't mind, I'd tell you which close-ups I need 
the most.
BR,Mateusz

W dniu poniedziałek, 29 stycznia 2018 14:12:23 UTC+1 użytkownik The One True 
Stickman napisał:
I think I have this monitor, but will have to dig it out of the closet to 
check. If my memory is correct I'd be happy to grab some photos in the next 
couple days

On Mon, Jan 29, 2018 at 5:22 AM, zgbapl  wrote:

Hello there,
some time ago I got my first Mac ever - an LCII with a 12" RGB Monitor. The 
whole setup was stored in a moist basement and 

Re: Macintosh 12" RGB Display M1296G owners please help

[zgbapl]

Hi Guys,

the main board is pretty much complete now. I'm only missing a few parts 
now. I'd like to ask you to double check those two resistors:

R423 - my initial guess (I don't remember if I measured it or read the 
stripes) was 6,8K, but you guys say it's 68K
R506 - the other way round - in my sheet it's 68K, not 6,8K

Additionally I'm not 100% sure if I got those power resistors right:

R419, R526 - 1,2 ohm
R511, R514 - 10 ohm
R911 - 0,33 ohm

Hopefully I got it all right. Keep the fingers crossed.

Cheers,
Mateusz

W dniu wtorek, 20 lutego 2018 21:59:16 UTC+1 użytkownik The One True 
Stickman napisał:
>
> Yes, Keith also measured this one at 160K after I posted my initial list. 
> Out-of-circuit test confirms 160K, so there's a triple-check!
>
> On Tue, Feb 20, 2018 at 6:05 AM, zgbapl  wrote:
>
>> >> Typo - 86 makes no sense for R521, I think it must either be 76 or 16 
>> ohm. 
>>
>> I think I have measured this one and it's more like 160K 1%. Maybe you 
>> could measure it in-circuit? I will do the same with 160K resistor soldered 
>> in and compare the results. That's the biggest difference between my 
>> measurements and your readings so far, so it would be nice to double check 
>> it.
>>
>> W dniu piątek, 2 lutego 2018 14:14:54 UTC+1 użytkownik The One True 
>> Stickman napisał:
>>>
>>> Typo - 86 makes no sense for R521, I think it must either be 76 or 16 
>>> ohm. 
>>>
>>> On Tue, Jan 30, 2018 at 7:58 PM,  wrote:
>>>
 Added to the folder - in case colors aren't visible, here are resistor 
 codes & values. All appear to be 1/8W carbon 5% except R521 & R423, which 
 look like a 1% metal film:

 R919 10K (Brown Black Orange)
 R920 47K (Red Violet Orange)
 R521 86ohm?  (Violet Blue Black Gold 1% metal film - this one is hard 
 to read)
 R523 12K (Brown Red Orange)
 R423 68K (Blue Grey Black Red 1% metal film)
 R506 6K8 (Blue Grey Red)

 Let me know if you need anything else, I didn't have more than a few 
 minutes today.

 I'd bet the only real difference between the US & European model is in 
 the line voltage power supply side of the board and the rest is pretty 
 similar. There's a photo of the entire board and one of just the 
 signals/HV 
 side.
 For future searchers: I will upload these all to flickr or imgur as 
 well and post the link, as I won't keep them in dropbox forever.  



 On Tue, Jan 30, 2018 at 1:57 AM, zgbapl  wrote:

> >>  is yours also a US model or an international?
>
> It's an european one. Seems like there are some differences between 
> our models. Still, I'd like to see a few close shots of your board.
>
> So if you could take a pic of the following elements, that would be 
> great. To make it easier, I'm gonna tell you rough directions (my board 
> is 
> facing the flyback down, so the CRT is on my right hand side) and their 
> orientation.
>
> R919, R920 - two small ones, center right (under the CRT neck) in 
> close proximity of Q905 transistor (with a big heat sink) and two blue 
> disc 
> caps; vertical
> R521 - near the flyback transformer, slightly above and on the left; 
> horizontal
> R523 - slightly lower than the previous one; horizontal
> R423 - left to the J501 (vertical connector, lots of wires); horizontal
> R506 - far bottom left, above H-hold pot; horizontal
>
> Those are the troublesome ones. Please take a picture of the underside 
> of the board - even if they are slightly different, I should be able to 
> figure out the differences by looking at the connections.
>
> Many thanks.
> Mateusz
>
> W dniu wtorek, 30 stycznia 2018 00:19:06 UTC+1 użytkownik The One True 
> Stickman napisał:
>>
>> Mine is an M1296 110V/60Hz US model, no G suffix - is yours also a US 
>> model or an international? Some photos linked below, I can pull the 
>> boards 
>> out if needed.  
>>
>>
>> https://www.dropbox.com/sh/9s390k8gcva62e4/AABptFdkwVknxSDRcH_zyi40a?dl=0
>>  
>> 
>>
>> On Mon, Jan 29, 2018 at 8:49 AM, zgbapl  wrote:
>>
>>> Oh, that would be great. If you don't mind, I'd tell you which 
>>> close-ups I need the most.
>>>
>>> BR,
>>> Mateusz
>>>
>>> W dniu poniedziałek, 29 stycznia 2018 14:12:23 UTC+1 użytkownik The 
>>> One True Stickman napisał:

 I think I have this monitor, but will have to dig it out of the 
 closet to check. If my memory is correct I'd be happy to grab some 
 photos 
 in the next couple days

 On Mon, Jan 29, 2018 at 5:22 AM, zgbapl  wrote:

Re: Macintosh 12" RGB Display M1296G owners please help

[theonetruestickman]

Yes, Keith also measured this one at 160K after I posted my initial list.
Out-of-circuit test confirms 160K, so there's a triple-check!

On Tue, Feb 20, 2018 at 6:05 AM, zgbapl  wrote:

> >> Typo - 86 makes no sense for R521, I think it must either be 76 or 16
> ohm.
>
> I think I have measured this one and it's more like 160K 1%. Maybe you
> could measure it in-circuit? I will do the same with 160K resistor soldered
> in and compare the results. That's the biggest difference between my
> measurements and your readings so far, so it would be nice to double check
> it.
>
> W dniu piątek, 2 lutego 2018 14:14:54 UTC+1 użytkownik The One True
> Stickman napisał:
>>
>> Typo - 86 makes no sense for R521, I think it must either be 76 or 16
>> ohm.
>>
>> On Tue, Jan 30, 2018 at 7:58 PM,  wrote:
>>
>>> Added to the folder - in case colors aren't visible, here are resistor
>>> codes & values. All appear to be 1/8W carbon 5% except R521 & R423, which
>>> look like a 1% metal film:
>>>
>>> R919 10K (Brown Black Orange)
>>> R920 47K (Red Violet Orange)
>>> R521 86ohm?  (Violet Blue Black Gold 1% metal film - this one is hard to
>>> read)
>>> R523 12K (Brown Red Orange)
>>> R423 68K (Blue Grey Black Red 1% metal film)
>>> R506 6K8 (Blue Grey Red)
>>>
>>> Let me know if you need anything else, I didn't have more than a few
>>> minutes today.
>>>
>>> I'd bet the only real difference between the US & European model is in
>>> the line voltage power supply side of the board and the rest is pretty
>>> similar. There's a photo of the entire board and one of just the signals/HV
>>> side.
>>> For future searchers: I will upload these all to flickr or imgur as well
>>> and post the link, as I won't keep them in dropbox forever.
>>>
>>>
>>>
>>> On Tue, Jan 30, 2018 at 1:57 AM, zgbapl  wrote:
>>>
 >>  is yours also a US model or an international?

 It's an european one. Seems like there are some differences between our
 models. Still, I'd like to see a few close shots of your board.

 So if you could take a pic of the following elements, that would be
 great. To make it easier, I'm gonna tell you rough directions (my board is
 facing the flyback down, so the CRT is on my right hand side) and their
 orientation.

 R919, R920 - two small ones, center right (under the CRT neck) in close
 proximity of Q905 transistor (with a big heat sink) and two blue disc caps;
 vertical
 R521 - near the flyback transformer, slightly above and on the left;
 horizontal
 R523 - slightly lower than the previous one; horizontal
 R423 - left to the J501 (vertical connector, lots of wires); horizontal
 R506 - far bottom left, above H-hold pot; horizontal

 Those are the troublesome ones. Please take a picture of the underside
 of the board - even if they are slightly different, I should be able to
 figure out the differences by looking at the connections.

 Many thanks.
 Mateusz

 W dniu wtorek, 30 stycznia 2018 00:19:06 UTC+1 użytkownik The One True
 Stickman napisał:
>
> Mine is an M1296 110V/60Hz US model, no G suffix - is yours also a US
> model or an international? Some photos linked below, I can pull the boards
> out if needed.
>
> https://www.dropbox.com/sh/9s390k8gcva62e4/AABptFdkwVknxSDRc
> H_zyi40a?dl=0
> 
>
> On Mon, Jan 29, 2018 at 8:49 AM, zgbapl  wrote:
>
>> Oh, that would be great. If you don't mind, I'd tell you which
>> close-ups I need the most.
>>
>> BR,
>> Mateusz
>>
>> W dniu poniedziałek, 29 stycznia 2018 14:12:23 UTC+1 użytkownik The
>> One True Stickman napisał:
>>>
>>> I think I have this monitor, but will have to dig it out of the
>>> closet to check. If my memory is correct I'd be happy to grab some 
>>> photos
>>> in the next couple days
>>>
>>> On Mon, Jan 29, 2018 at 5:22 AM, zgbapl  wrote:
>>>
 Hello there,

 some time ago I got my first Mac ever - an LCII with a 12" RGB
 Monitor. The whole setup was stored in a moist basement and 
 unfortunately
 somebody has spilled some washing powder all over it. It turns out that
 this stuff is even more corrosive than battery acid. The computer 
 itself
 was in a relative good condition. I had to replace some components, 
 repair
 two broken traces and give it a good clean and after that it happens to
 work just fine.

 The monitor is a different story. It was very badly corroded,
 especially resistors were covered with rust. I have desoldered all of 
 them
 but a few of them were faulty and I couldn't 

Re: Macintosh 12" RGB Display M1296G owners please help

[zgbapl]

>> Typo - 86 makes no sense for R521, I think it must either be 76 or 16 
ohm. 

I think I have measured this one and it's more like 160K 1%. Maybe you 
could measure it in-circuit? I will do the same with 160K resistor soldered 
in and compare the results. That's the biggest difference between my 
measurements and your readings so far, so it would be nice to double check 
it.

W dniu piątek, 2 lutego 2018 14:14:54 UTC+1 użytkownik The One True 
Stickman napisał:
>
> Typo - 86 makes no sense for R521, I think it must either be 76 or 16 ohm. 
>
> On Tue, Jan 30, 2018 at 7:58 PM,  
> wrote:
>
>> Added to the folder - in case colors aren't visible, here are resistor 
>> codes & values. All appear to be 1/8W carbon 5% except R521 & R423, which 
>> look like a 1% metal film:
>>
>> R919 10K (Brown Black Orange)
>> R920 47K (Red Violet Orange)
>> R521 86ohm?  (Violet Blue Black Gold 1% metal film - this one is hard to 
>> read)
>> R523 12K (Brown Red Orange)
>> R423 68K (Blue Grey Black Red 1% metal film)
>> R506 6K8 (Blue Grey Red)
>>
>> Let me know if you need anything else, I didn't have more than a few 
>> minutes today.
>>
>> I'd bet the only real difference between the US & European model is in 
>> the line voltage power supply side of the board and the rest is pretty 
>> similar. There's a photo of the entire board and one of just the signals/HV 
>> side.
>> For future searchers: I will upload these all to flickr or imgur as well 
>> and post the link, as I won't keep them in dropbox forever.  
>>
>>
>>
>> On Tue, Jan 30, 2018 at 1:57 AM, zgbapl  
>> wrote:
>>
>>> >>  is yours also a US model or an international?
>>>
>>> It's an european one. Seems like there are some differences between our 
>>> models. Still, I'd like to see a few close shots of your board.
>>>
>>> So if you could take a pic of the following elements, that would be 
>>> great. To make it easier, I'm gonna tell you rough directions (my board is 
>>> facing the flyback down, so the CRT is on my right hand side) and their 
>>> orientation.
>>>
>>> R919, R920 - two small ones, center right (under the CRT neck) in close 
>>> proximity of Q905 transistor (with a big heat sink) and two blue disc caps; 
>>> vertical
>>> R521 - near the flyback transformer, slightly above and on the left; 
>>> horizontal
>>> R523 - slightly lower than the previous one; horizontal
>>> R423 - left to the J501 (vertical connector, lots of wires); horizontal
>>> R506 - far bottom left, above H-hold pot; horizontal
>>>
>>> Those are the troublesome ones. Please take a picture of the underside 
>>> of the board - even if they are slightly different, I should be able to 
>>> figure out the differences by looking at the connections.
>>>
>>> Many thanks.
>>> Mateusz
>>>
>>> W dniu wtorek, 30 stycznia 2018 00:19:06 UTC+1 użytkownik The One True 
>>> Stickman napisał:

 Mine is an M1296 110V/60Hz US model, no G suffix - is yours also a US 
 model or an international? Some photos linked below, I can pull the boards 
 out if needed.  


 https://www.dropbox.com/sh/9s390k8gcva62e4/AABptFdkwVknxSDRcH_zyi40a?dl=0 
 

 On Mon, Jan 29, 2018 at 8:49 AM, zgbapl  wrote:

> Oh, that would be great. If you don't mind, I'd tell you which 
> close-ups I need the most.
>
> BR,
> Mateusz
>
> W dniu poniedziałek, 29 stycznia 2018 14:12:23 UTC+1 użytkownik The 
> One True Stickman napisał:
>>
>> I think I have this monitor, but will have to dig it out of the 
>> closet to check. If my memory is correct I'd be happy to grab some 
>> photos 
>> in the next couple days
>>
>> On Mon, Jan 29, 2018 at 5:22 AM, zgbapl  wrote:
>>
>>> Hello there,
>>>
>>> some time ago I got my first Mac ever - an LCII with a 12" RGB 
>>> Monitor. The whole setup was stored in a moist basement and 
>>> unfortunately 
>>> somebody has spilled some washing powder all over it. It turns out that 
>>> this stuff is even more corrosive than battery acid. The computer 
>>> itself 
>>> was in a relative good condition. I had to replace some components, 
>>> repair 
>>> two broken traces and give it a good clean and after that it happens to 
>>> work just fine.
>>>
>>> The monitor is a different story. It was very badly corroded, 
>>> especially resistors were covered with rust. I have desoldered all of 
>>> them 
>>> but a few of them were faulty and I couldn't measure their values. 
>>> Color 
>>> bars were either washed out or totally covered with rust. I have 
>>> figured 
>>> out most of them but I still have some pure guesses. There's no 
>>> (useful) 
>>> service manual or schematic I could use.

RE: Macintosh 12" RGB Display M1296G owners please help

[Mateusz Kolański]

Looks like my measurements weren’t that off. I had some problems with a few 
pots, as they were corroded and the resistive traces were broken. I measured 
them from one end to the gap and the other way round, added it up and here’s 
what I got:

 

VR401   74k

VR501   10k?

VR502   4k7

VR402   200k

VR404   0k6

VR403   10k?

VR503   3k3

 

Sure it helps a lot, thanks again. The PCB is mostly populated now, I’m only 
missing a few parts I didn’t order for some reason and the biggest ones like 
the flyback transformer and heatsinks. I’ve been cleaning them today using a 
dremel with a wire wheel attached. To this very moment I’m removing those small 
wires from my beard J I will definitely create a blog soon and describe the 
whole process.

 

Cheers.

 

From: nathanael.hasbro...@gmail.com [mailto:nathanael.hasbro...@gmail.com] On 
Behalf Of theonetruestick...@gmail.com
Sent: Monday, February 19, 2018 5:16 PM
To: vintage-macs@googlegroups.com
Subject: Re: Macintosh 12" RGB Display M1296G owners please help

 

The markings weren't obvious to me either - not enough numbers for the normal 
designations! Based on measurements it looks like the numbers are a two-digit 
code, so the 53s are 5K (5+000), 25 is 200K, etc. Letter designations are 
probably log/lin taper, though 'z' is not common - not sure about that one. 
Maybe they are alternate codings or a custom taper?

They all are somewhere in the middle of their ranges on my monitor, so it's 
likely a close value will work if the exact isn't available. You can't quite 
see from the traces, but the four I was able to test in-circuit are wired as a 
rheostat (wiper shorted to one leg of the pot).

Photos uploaded, and measured values as follows:

H-CENT  VR503  2.5K out-of-circuit

V-CENT  VR403  9.3K out-of-circuit

V-HEIGHT  VR404  500-ohm out-of-circuit

V-LIN   VR402   174K in-circuit

H-HOLD  VR502  5K in-circuit

H-PHASE  VR5014.6K in-circuit

V-HOLD  VR401  90K in-circuit (probably 100K)

Hope that helps!

 

 

On Thu, Feb 15, 2018 at 12:20 AM, zgbapl <z...@o2.pl> wrote:

Hi there, just wanted to say, that I'm still working on the PCB and making some 
progress, but unfortunately I can't spend as much time on it as I'd like to. I 
hope that I got all the resistors right, I'm just not sure about those pots on 
the edge of the board, they were totally corroded and their markings don't tell 
me much. If your monitor is still open, maybe you could get more info on them? 
Cheers


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To 

Re: Macintosh 12" RGB Display M1296G owners please help

[theonetruestickman]

The markings weren't obvious to me either - not enough numbers for the
normal designations! Based on measurements it looks like the numbers are a
two-digit code, so the 53s are 5K (5+000), 25 is 200K, etc. Letter
designations are probably log/lin taper, though 'z' is not common - not
sure about that one. Maybe they are alternate codings or a custom taper?

They all are somewhere in the middle of their ranges on my monitor, so it's
likely a close value will work if the exact isn't available. You can't
quite see from the traces, but the four I was able to test in-circuit are
wired as a rheostat (wiper shorted to one leg of the pot).

Photos uploaded, and measured values as follows:

H-CENT  VR503  2.5K out-of-circuit
V-CENT  VR403  9.3K out-of-circuit
V-HEIGHT  VR404  500-ohm out-of-circuit
V-LIN   VR402   174K in-circuit

H-HOLD  VR502  5K in-circuit
H-PHASE  VR5014.6K in-circuit
V-HOLD  VR401  90K in-circuit (probably 100K)

Hope that helps!


On Thu, Feb 15, 2018 at 12:20 AM, zgbapl  wrote:

> Hi there, just wanted to say, that I'm still working on the PCB and making
> some progress, but unfortunately I can't spend as much time on it as I'd
> like to. I hope that I got all the resistors right, I'm just not sure about
> those pots on the edge of the board, they were totally corroded and their
> markings don't tell me much. If your monitor is still open, maybe you could
> get more info on them? Cheers
>
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> You received this message because you are a member of the Vintage Macs
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> To post to this group, send email to vintage-macs@googlegroups.com
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Re: Macintosh 12" RGB Display M1296G owners please help

[zgbapl]

Hi there, just wanted to say, that I'm still working on the PCB and making some 
progress, but unfortunately I can't spend as much time on it as I'd like to. I 
hope that I got all the resistors right, I'm just not sure about those pots on 
the edge of the board, they were totally corroded and their markings don't tell 
me much. If your monitor is still open, maybe you could get more info on them? 
Cheers

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Re: Macintosh 12" RGB Display M1296G owners please help

[theonetruestickman]

No problem, happy to help! It's been open on the bench all week, so a
couple more days won't hurt. Thanks also to Keith for measuring out
resistor values to confirm based on another Euro model as well.

Photos of the damage might help others advise on the CRT stuff - I haven't
dealt much with that level of corrosion either. I think it's always a good
idea to archive & publish as much as possible to help others fix problems
in the future, though I'm not usually good at remembering to do it. :)

Side note - has anyone else here thought about using iFixit's repair
database for storing tear-down and repair documentation? They are pretty
extensive on the newer machines but the old stuff is sparse. Or is there
another resource I'm not aware of that is better suited?

On Fri, Feb 2, 2018 at 12:58 PM, zgbapl  wrote:

> Dear Sir, you definitely made my day! From now on I will start measuring
> the awesomeness level in theonetruestickmans/m^3 :) Thanks a ton.
>
> >> I'd bet the only real difference between the US & European model is in
> the line voltage power supply side of the board and the rest is pretty
> similar.
> To my eye there are some differences in layout on both sides (like on my
> board VR504 /the potted one/ is in the upper right corner and on your
> revision it's near the flyback), but apart from that they look similar to
> each other. BTW I have scanned both sides of my board and even if I won't
> vectorize them or even convert to a schematic, I will definitely upload
> them somewhere, because there's no documentation whatsoever.
>
> If you're interested I can also post some of my other photos showcasing
> the overall damage the monitor was suffering and some close ups of damaged
> parts. I will also make some restoration photos as soon as I start
> tinkering. There's a lot to be done - as I told you the PCB is totally
> empty. I have to clean some of the damaged traces and cover them with pcb
> varnish, install bridges and other components. That may take a while. Later
> on I will have to clean the board on the CRT (not the neck one) as it has
> some very bad blue corrosion. I have no idea how to get rid of the washing
> powder residues on the coils and around the CRT neck - normally I would
> use some alcohol or even demineralized water, but I'm affraid of ruining
> the dag layer on the CRT. Any ideas?
>
> Let me know if you're interested in the restoration process. And please
> leave your monitor disassembled for a day or two as I might need some more
> assistance:)
>
> W dniu piątek, 2 lutego 2018 14:14:54 UTC+1 użytkownik The One True
> Stickman napisał:
>>
>> Added to the folder - in case colors aren't visible, here are resistor
>> codes & values. All appear to be 1/8W carbon 5% except R521 & R423, which
>> look like a 1% metal film:
>>
>> R919 10K (Brown Black Orange)
>> R920 47K (Red Violet Orange)
>> R521 86ohm?  (Violet Blue Black Gold 1% metal film - this one is hard to
>> read)
>> R523 12K (Brown Red Orange)
>> R423 68K (Blue Grey Black Red 1% metal film)
>> R506 6K8 (Blue Grey Red)
>>
>> Let me know if you need anything else, I didn't have more than a few
>> minutes today.
>>
>> I'd bet the only real difference between the US & European model is in
>> the line voltage power supply side of the board and the rest is pretty
>> similar. There's a photo of the entire board and one of just the signals/HV
>> side.
>> For future searchers: I will upload these all to flickr or imgur as well
>> and post the link, as I won't keep them in dropbox forever.
>>
>>
>>
>> On Tue, Jan 30, 2018 at 1:57 AM, zgbapl  wrote:
>>
>>> >>  is yours also a US model or an international?
>>>
>>> It's an european one. Seems like there are some differences between our
>>> models. Still, I'd like to see a few close shots of your board.
>>>
>>> So if you could take a pic of the following elements, that would be
>>> great. To make it easier, I'm gonna tell you rough directions (my board is
>>> facing the flyback down, so the CRT is on my right hand side) and their
>>> orientation.
>>>
>>> R919, R920 - two small ones, center right (under the CRT neck) in close
>>> proximity of Q905 transistor (with a big heat sink) and two blue disc caps;
>>> vertical
>>> R521 - near the flyback transformer, slightly above and on the left;
>>> horizontal
>>> R523 - slightly lower than the previous one; horizontal
>>> R423 - left to the J501 (vertical connector, lots of wires); horizontal
>>> R506 - far bottom left, above H-hold pot; horizontal
>>>
>>> Those are the troublesome ones. Please take a picture of the underside
>>> of the board - even if they are slightly different, I should be able to
>>> figure out the differences by looking at the connections.
>>>
>>> Many thanks.
>>> Mateusz
>>>
>>> W dniu wtorek, 30 stycznia 2018 00:19:06 UTC+1 użytkownik The One True
>>> Stickman napisał:

 Mine is an M1296 110V/60Hz US model, no G suffix - is yours also a US
 model or an international? Some photos 

Re: Macintosh 12" RGB Display M1296G owners please help

[zgbapl]

Dear Sir, you definitely made my day! From now on I will start measuring 
the awesomeness level in theonetruestickmans/m^3 :) Thanks a ton.

>> I'd bet the only real difference between the US & European model is in 
the line voltage power supply side of the board and the rest is pretty 
similar.
To my eye there are some differences in layout on both sides (like on my 
board VR504 /the potted one/ is in the upper right corner and on your 
revision it's near the flyback), but apart from that they look similar to 
each other. BTW I have scanned both sides of my board and even if I won't 
vectorize them or even convert to a schematic, I will definitely upload 
them somewhere, because there's no documentation whatsoever.

If you're interested I can also post some of my other photos showcasing the 
overall damage the monitor was suffering and some close ups of damaged 
parts. I will also make some restoration photos as soon as I start 
tinkering. There's a lot to be done - as I told you the PCB is totally 
empty. I have to clean some of the damaged traces and cover them with pcb 
varnish, install bridges and other components. That may take a while. Later 
on I will have to clean the board on the CRT (not the neck one) as it has 
some very bad blue corrosion. I have no idea how to get rid of the washing 
powder residues on the coils and around the CRT neck - normally I would  
use some alcohol or even demineralized water, but I'm affraid of ruining 
the dag layer on the CRT. Any ideas?

Let me know if you're interested in the restoration process. And please 
leave your monitor disassembled for a day or two as I might need some more 
assistance:)

W dniu piątek, 2 lutego 2018 14:14:54 UTC+1 użytkownik The One True 
Stickman napisał:
>
> Added to the folder - in case colors aren't visible, here are resistor 
> codes & values. All appear to be 1/8W carbon 5% except R521 & R423, which 
> look like a 1% metal film:
>
> R919 10K (Brown Black Orange)
> R920 47K (Red Violet Orange)
> R521 86ohm?  (Violet Blue Black Gold 1% metal film - this one is hard to 
> read)
> R523 12K (Brown Red Orange)
> R423 68K (Blue Grey Black Red 1% metal film)
> R506 6K8 (Blue Grey Red)
>
> Let me know if you need anything else, I didn't have more than a few 
> minutes today.
>
> I'd bet the only real difference between the US & European model is in the 
> line voltage power supply side of the board and the rest is pretty similar. 
> There's a photo of the entire board and one of just the signals/HV side.
> For future searchers: I will upload these all to flickr or imgur as well 
> and post the link, as I won't keep them in dropbox forever.  
>
>
>
> On Tue, Jan 30, 2018 at 1:57 AM, zgbapl  wrote:
>
>> >>  is yours also a US model or an international?
>>
>> It's an european one. Seems like there are some differences between our 
>> models. Still, I'd like to see a few close shots of your board.
>>
>> So if you could take a pic of the following elements, that would be 
>> great. To make it easier, I'm gonna tell you rough directions (my board is 
>> facing the flyback down, so the CRT is on my right hand side) and their 
>> orientation.
>>
>> R919, R920 - two small ones, center right (under the CRT neck) in close 
>> proximity of Q905 transistor (with a big heat sink) and two blue disc caps; 
>> vertical
>> R521 - near the flyback transformer, slightly above and on the left; 
>> horizontal
>> R523 - slightly lower than the previous one; horizontal
>> R423 - left to the J501 (vertical connector, lots of wires); horizontal
>> R506 - far bottom left, above H-hold pot; horizontal
>>
>> Those are the troublesome ones. Please take a picture of the underside of 
>> the board - even if they are slightly different, I should be able to figure 
>> out the differences by looking at the connections.
>>
>> Many thanks.
>> Mateusz
>>
>> W dniu wtorek, 30 stycznia 2018 00:19:06 UTC+1 użytkownik The One True 
>> Stickman napisał:
>>>
>>> Mine is an M1296 110V/60Hz US model, no G suffix - is yours also a US 
>>> model or an international? Some photos linked below, I can pull the boards 
>>> out if needed.  
>>>
>>> https://www.dropbox.com/sh/9s390k8gcva62e4/AABptFdkwVknxSDRcH_zyi40a?dl=0 
>>> 
>>>
>>> On Mon, Jan 29, 2018 at 8:49 AM, zgbapl  wrote:
>>>
 Oh, that would be great. If you don't mind, I'd tell you which 
 close-ups I need the most.

 BR,
 Mateusz

 W dniu poniedziałek, 29 stycznia 2018 14:12:23 UTC+1 użytkownik The One 
 True Stickman napisał:
>
> I think I have this monitor, but will have to dig it out of the closet 
> to check. If my memory is correct I'd be happy to grab some photos in the 
> next couple days
>
> On Mon, Jan 29, 2018 at 5:22 AM, zgbapl  wrote:
>
>> Hello there,
>>

Re: Macintosh 12" RGB Display M1296G owners please help

[theonetruestickman]

Yes, that should have been 27K - thanks! That's why I listed the color code
*and* took photos... :)

On Fri, Feb 2, 2018 at 8:29 AM, j...@jagdt.com  wrote:

> perhaps another typo ?
>
> Am 31.01.2018 um 02:08 schrieb theonetruestick...@gmail.com:
>
> Typo - 86 makes no sense for R521, I think it must either be 76 or 16 ohm.
>
> On Tue, Jan 30, 2018 at 7:58 PM,  wrote:
>
>> Added to the folder - in case colors aren't visible, here are resistor
>> codes & values. All appear to be 1/8W carbon 5% except R521 & R423, which
>> look like a 1% metal film:
>>
>> R919 10K (Brown Black Orange)
>>
>
>
> R920 47K (Red Violet Orange)
>>
>
> 27K
>
> R521 86ohm?  (Violet Blue Black Gold 1% metal film - this one is hard to
>> read)
>>
> R523 12K (Brown Red Orange)
>> R423 68K (Blue Grey Black Red 1% metal film)
>> R506 6K8 (Blue Grey Red)
>>
>> Let me know if you need anything else, I didn't have more than a few
>> minutes today.
>>
>> I'd bet the only real difference between the US & European model is in
>> the line voltage power supply side of the board and the rest is pretty
>> similar. There's a photo of the entire board and one of just the signals/HV
>> side.
>> For future searchers: I will upload these all to flickr or imgur as well
>> and post the link, as I won't keep them in dropbox forever.
>>
>>
>>
>> On Tue, Jan 30, 2018 at 1:57 AM, zgbapl  wrote:
>>
>>> >>  is yours also a US model or an international?
>>>
>>> It's an european one. Seems like there are some differences between our
>>> models. Still, I'd like to see a few close shots of your board.
>>>
>>> So if you could take a pic of the following elements, that would be
>>> great. To make it easier, I'm gonna tell you rough directions (my board is
>>> facing the flyback down, so the CRT is on my right hand side) and their
>>> orientation.
>>>
>>> R919, R920 - two small ones, center right (under the CRT neck) in close
>>> proximity of Q905 transistor (with a big heat sink) and two blue disc caps;
>>> vertical
>>> R521 - near the flyback transformer, slightly above and on the left;
>>> horizontal
>>> R523 - slightly lower than the previous one; horizontal
>>> R423 - left to the J501 (vertical connector, lots of wires); horizontal
>>> R506 - far bottom left, above H-hold pot; horizontal
>>>
>>> Those are the troublesome ones. Please take a picture of the underside
>>> of the board - even if they are slightly different, I should be able to
>>> figure out the differences by looking at the connections.
>>>
>>> Many thanks.
>>> Mateusz
>>>
>>> W dniu wtorek, 30 stycznia 2018 00:19:06 UTC+1 użytkownik The One True
>>> Stickman napisał:

 Mine is an M1296 110V/60Hz US model, no G suffix - is yours also a US
 model or an international? Some photos linked below, I can pull the boards
 out if needed.

 https://www.dropbox.com/sh/9s390k8gcva62e4/AABptFdkwVknxSDRc
 H_zyi40a?dl=0
 

 On Mon, Jan 29, 2018 at 8:49 AM, zgbapl  wrote:

> Oh, that would be great. If you don't mind, I'd tell you which
> close-ups I need the most.
>
> BR,
> Mateusz
>
> W dniu poniedziałek, 29 stycznia 2018 14:12:23 UTC+1 użytkownik The
> One True Stickman napisał:
>>
>> I think I have this monitor, but will have to dig it out of the
>> closet to check. If my memory is correct I'd be happy to grab some photos
>> in the next couple days
>>
>> On Mon, Jan 29, 2018 at 5:22 AM, zgbapl  wrote:
>>
>>> Hello there,
>>>
>>> some time ago I got my first Mac ever - an LCII with a 12" RGB
>>> Monitor. The whole setup was stored in a moist basement and 
>>> unfortunately
>>> somebody has spilled some washing powder all over it. It turns out that
>>> this stuff is even more corrosive than battery acid. The computer itself
>>> was in a relative good condition. I had to replace some components, 
>>> repair
>>> two broken traces and give it a good clean and after that it happens to
>>> work just fine.
>>>
>>> The monitor is a different story. It was very badly corroded,
>>> especially resistors were covered with rust. I have desoldered all of 
>>> them
>>> but a few of them were faulty and I couldn't measure their values. Color
>>> bars were either washed out or totally covered with rust. I have figured
>>> out most of them but I still have some pure guesses. There's no (useful)
>>> service manual or schematic I could use.
>>>
>>> Before anybody tells me no to bother - I know that this stuff is
>>> neither vintage nor rare, but I'm really having fun trying to rescue old
>>> hardware. Right now I'm at the point where the PCB is totally emptied of
>>> any parts and once I fix the 

Re: Macintosh 12" RGB Display M1296G owners please help

[j...@jagdt.com]

perhaps another typo ?

> Am 31.01.2018 um 02:08 schrieb theonetruestick...@gmail.com:
> 
> Typo - 86 makes no sense for R521, I think it must either be 76 or 16 ohm. 
> 
> On Tue, Jan 30, 2018 at 7:58 PM,  > wrote:
> Added to the folder - in case colors aren't visible, here are resistor codes 
> & values. All appear to be 1/8W carbon 5% except R521 & R423, which look like 
> a 1% metal film:
> 
> R919 10K (Brown Black Orange)


> R920 47K (Red Violet Orange)  

27K

> R521 86ohm?  (Violet Blue Black Gold 1% metal film - this one is hard to read)
> R523 12K (Brown Red Orange)
> R423 68K (Blue Grey Black Red 1% metal film)
> R506 6K8 (Blue Grey Red)
> 
> Let me know if you need anything else, I didn't have more than a few minutes 
> today.
> 
> I'd bet the only real difference between the US & European model is in the 
> line voltage power supply side of the board and the rest is pretty similar. 
> There's a photo of the entire board and one of just the signals/HV side.
> For future searchers: I will upload these all to flickr or imgur as well and 
> post the link, as I won't keep them in dropbox forever.  
> 
> 
> 
> On Tue, Jan 30, 2018 at 1:57 AM, zgbapl > 
> wrote:
> >>  is yours also a US model or an international?
> 
> It's an european one. Seems like there are some differences between our 
> models. Still, I'd like to see a few close shots of your board.
> 
> So if you could take a pic of the following elements, that would be great. To 
> make it easier, I'm gonna tell you rough directions (my board is facing the 
> flyback down, so the CRT is on my right hand side) and their orientation.
> 
> R919, R920 - two small ones, center right (under the CRT neck) in close 
> proximity of Q905 transistor (with a big heat sink) and two blue disc caps; 
> vertical
> R521 - near the flyback transformer, slightly above and on the left; 
> horizontal
> R523 - slightly lower than the previous one; horizontal
> R423 - left to the J501 (vertical connector, lots of wires); horizontal
> R506 - far bottom left, above H-hold pot; horizontal
> 
> Those are the troublesome ones. Please take a picture of the underside of the 
> board - even if they are slightly different, I should be able to figure out 
> the differences by looking at the connections.
> 
> Many thanks.
> Mateusz
> 
> W dniu wtorek, 30 stycznia 2018 00:19:06 UTC+1 użytkownik The One True 
> Stickman napisał:
> Mine is an M1296 110V/60Hz US model, no G suffix - is yours also a US model 
> or an international? Some photos linked below, I can pull the boards out if 
> needed.  
> 
> https://www.dropbox.com/sh/9s390k8gcva62e4/AABptFdkwVknxSDRcH_zyi40a?dl=0 
> 
> 
> On Mon, Jan 29, 2018 at 8:49 AM, zgbapl > wrote:
> Oh, that would be great. If you don't mind, I'd tell you which close-ups I 
> need the most.
> 
> BR,
> Mateusz
> 
> W dniu poniedziałek, 29 stycznia 2018 14:12:23 UTC+1 użytkownik The One True 
> Stickman napisał:
> I think I have this monitor, but will have to dig it out of the closet to 
> check. If my memory is correct I'd be happy to grab some photos in the next 
> couple days
> 
> On Mon, Jan 29, 2018 at 5:22 AM, zgbapl > wrote:
> Hello there,
> 
> some time ago I got my first Mac ever - an LCII with a 12" RGB Monitor. The 
> whole setup was stored in a moist basement and unfortunately somebody has 
> spilled some washing powder all over it. It turns out that this stuff is even 
> more corrosive than battery acid. The computer itself was in a relative good 
> condition. I had to replace some components, repair two broken traces and 
> give it a good clean and after that it happens to work just fine.
> 
> The monitor is a different story. It was very badly corroded, especially 
> resistors were covered with rust. I have desoldered all of them but a few of 
> them were faulty and I couldn't measure their values. Color bars were either 
> washed out or totally covered with rust. I have figured out most of them but 
> I still have some pure guesses. There's no (useful) service manual or 
> schematic I could use.
> 
> Before anybody tells me no to bother - I know that this stuff is neither 
> vintage nor rare, but I'm really having fun trying to rescue old hardware. 
> Right now I'm at the point where the PCB is totally emptied of any parts and 
> once I fix the traces and cover them back with solder mask, I will start 
> re-populating the board.
> 
> TL;DR - is there anybody out there willing to disassemble his M1296G and take 
> a few photos of the main board?
> 
> Thanks a lot.
> 
> BR,
> Mateusz
> 
> -- 
> -- 
> -
> You received this message because you are a member of the Vintage Macs group.
> The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml 

Re: Macintosh 12" RGB Display M1296G owners please help

[theonetruestickman]

Typo - 86 makes no sense for R521, I think it must either be 76 or 16 ohm.

On Tue, Jan 30, 2018 at 7:58 PM,  wrote:

> Added to the folder - in case colors aren't visible, here are resistor
> codes & values. All appear to be 1/8W carbon 5% except R521 & R423, which
> look like a 1% metal film:
>
> R919 10K (Brown Black Orange)
> R920 47K (Red Violet Orange)
> R521 86ohm?  (Violet Blue Black Gold 1% metal film - this one is hard to
> read)
> R523 12K (Brown Red Orange)
> R423 68K (Blue Grey Black Red 1% metal film)
> R506 6K8 (Blue Grey Red)
>
> Let me know if you need anything else, I didn't have more than a few
> minutes today.
>
> I'd bet the only real difference between the US & European model is in the
> line voltage power supply side of the board and the rest is pretty similar.
> There's a photo of the entire board and one of just the signals/HV side.
> For future searchers: I will upload these all to flickr or imgur as well
> and post the link, as I won't keep them in dropbox forever.
>
>
>
> On Tue, Jan 30, 2018 at 1:57 AM, zgbapl  wrote:
>
>> >>  is yours also a US model or an international?
>>
>> It's an european one. Seems like there are some differences between our
>> models. Still, I'd like to see a few close shots of your board.
>>
>> So if you could take a pic of the following elements, that would be
>> great. To make it easier, I'm gonna tell you rough directions (my board is
>> facing the flyback down, so the CRT is on my right hand side) and their
>> orientation.
>>
>> R919, R920 - two small ones, center right (under the CRT neck) in close
>> proximity of Q905 transistor (with a big heat sink) and two blue disc caps;
>> vertical
>> R521 - near the flyback transformer, slightly above and on the left;
>> horizontal
>> R523 - slightly lower than the previous one; horizontal
>> R423 - left to the J501 (vertical connector, lots of wires); horizontal
>> R506 - far bottom left, above H-hold pot; horizontal
>>
>> Those are the troublesome ones. Please take a picture of the underside of
>> the board - even if they are slightly different, I should be able to figure
>> out the differences by looking at the connections.
>>
>> Many thanks.
>> Mateusz
>>
>> W dniu wtorek, 30 stycznia 2018 00:19:06 UTC+1 użytkownik The One True
>> Stickman napisał:
>>>
>>> Mine is an M1296 110V/60Hz US model, no G suffix - is yours also a US
>>> model or an international? Some photos linked below, I can pull the boards
>>> out if needed.
>>>
>>> https://www.dropbox.com/sh/9s390k8gcva62e4/AABptFdkwVknxSDRc
>>> H_zyi40a?dl=0
>>> 
>>>
>>> On Mon, Jan 29, 2018 at 8:49 AM, zgbapl  wrote:
>>>
 Oh, that would be great. If you don't mind, I'd tell you which
 close-ups I need the most.

 BR,
 Mateusz

 W dniu poniedziałek, 29 stycznia 2018 14:12:23 UTC+1 użytkownik The One
 True Stickman napisał:
>
> I think I have this monitor, but will have to dig it out of the closet
> to check. If my memory is correct I'd be happy to grab some photos in the
> next couple days
>
> On Mon, Jan 29, 2018 at 5:22 AM, zgbapl  wrote:
>
>> Hello there,
>>
>> some time ago I got my first Mac ever - an LCII with a 12" RGB
>> Monitor. The whole setup was stored in a moist basement and unfortunately
>> somebody has spilled some washing powder all over it. It turns out that
>> this stuff is even more corrosive than battery acid. The computer itself
>> was in a relative good condition. I had to replace some components, 
>> repair
>> two broken traces and give it a good clean and after that it happens to
>> work just fine.
>>
>> The monitor is a different story. It was very badly corroded,
>> especially resistors were covered with rust. I have desoldered all of 
>> them
>> but a few of them were faulty and I couldn't measure their values. Color
>> bars were either washed out or totally covered with rust. I have figured
>> out most of them but I still have some pure guesses. There's no (useful)
>> service manual or schematic I could use.
>>
>> Before anybody tells me no to bother - I know that this stuff is
>> neither vintage nor rare, but I'm really having fun trying to rescue old
>> hardware. Right now I'm at the point where the PCB is totally emptied of
>> any parts and once I fix the traces and cover them back with solder 
>> mask, I
>> will start re-populating the board.
>>
>> TL;DR - is there anybody out there willing to disassemble his M1296G
>> and take a few photos of the main board?
>>
>> Thanks a lot.
>>
>> BR,
>> Mateusz
>>
>> --
>> --
>> -
>> You received this message because you are a member of the Vintage

Re: Macintosh 12" RGB Display M1296G owners please help

[theonetruestickman]

Added to the folder - in case colors aren't visible, here are resistor
codes & values. All appear to be 1/8W carbon 5% except R521 & R423, which
look like a 1% metal film:

R919 10K (Brown Black Orange)
R920 47K (Red Violet Orange)
R521 86ohm?  (Violet Blue Black Gold 1% metal film - this one is hard to
read)
R523 12K (Brown Red Orange)
R423 68K (Blue Grey Black Red 1% metal film)
R506 6K8 (Blue Grey Red)

Let me know if you need anything else, I didn't have more than a few
minutes today.

I'd bet the only real difference between the US & European model is in the
line voltage power supply side of the board and the rest is pretty similar.
There's a photo of the entire board and one of just the signals/HV side.
For future searchers: I will upload these all to flickr or imgur as well
and post the link, as I won't keep them in dropbox forever.



On Tue, Jan 30, 2018 at 1:57 AM, zgbapl  wrote:

> >>  is yours also a US model or an international?
>
> It's an european one. Seems like there are some differences between our
> models. Still, I'd like to see a few close shots of your board.
>
> So if you could take a pic of the following elements, that would be great.
> To make it easier, I'm gonna tell you rough directions (my board is facing
> the flyback down, so the CRT is on my right hand side) and their
> orientation.
>
> R919, R920 - two small ones, center right (under the CRT neck) in close
> proximity of Q905 transistor (with a big heat sink) and two blue disc caps;
> vertical
> R521 - near the flyback transformer, slightly above and on the left;
> horizontal
> R523 - slightly lower than the previous one; horizontal
> R423 - left to the J501 (vertical connector, lots of wires); horizontal
> R506 - far bottom left, above H-hold pot; horizontal
>
> Those are the troublesome ones. Please take a picture of the underside of
> the board - even if they are slightly different, I should be able to figure
> out the differences by looking at the connections.
>
> Many thanks.
> Mateusz
>
> W dniu wtorek, 30 stycznia 2018 00:19:06 UTC+1 użytkownik The One True
> Stickman napisał:
>>
>> Mine is an M1296 110V/60Hz US model, no G suffix - is yours also a US
>> model or an international? Some photos linked below, I can pull the boards
>> out if needed.
>>
>> https://www.dropbox.com/sh/9s390k8gcva62e4/AABptFdkwVknxSDRcH_zyi40a?dl=0
>> 
>>
>> On Mon, Jan 29, 2018 at 8:49 AM, zgbapl  wrote:
>>
>>> Oh, that would be great. If you don't mind, I'd tell you which close-ups
>>> I need the most.
>>>
>>> BR,
>>> Mateusz
>>>
>>> W dniu poniedziałek, 29 stycznia 2018 14:12:23 UTC+1 użytkownik The One
>>> True Stickman napisał:

 I think I have this monitor, but will have to dig it out of the closet
 to check. If my memory is correct I'd be happy to grab some photos in the
 next couple days

 On Mon, Jan 29, 2018 at 5:22 AM, zgbapl  wrote:

> Hello there,
>
> some time ago I got my first Mac ever - an LCII with a 12" RGB
> Monitor. The whole setup was stored in a moist basement and unfortunately
> somebody has spilled some washing powder all over it. It turns out that
> this stuff is even more corrosive than battery acid. The computer itself
> was in a relative good condition. I had to replace some components, repair
> two broken traces and give it a good clean and after that it happens to
> work just fine.
>
> The monitor is a different story. It was very badly corroded,
> especially resistors were covered with rust. I have desoldered all of them
> but a few of them were faulty and I couldn't measure their values. Color
> bars were either washed out or totally covered with rust. I have figured
> out most of them but I still have some pure guesses. There's no (useful)
> service manual or schematic I could use.
>
> Before anybody tells me no to bother - I know that this stuff is
> neither vintage nor rare, but I'm really having fun trying to rescue old
> hardware. Right now I'm at the point where the PCB is totally emptied of
> any parts and once I fix the traces and cover them back with solder mask, 
> I
> will start re-populating the board.
>
> TL;DR - is there anybody out there willing to disassemble his M1296G
> and take a few photos of the main board?
>
> Thanks a lot.
>
> BR,
> Mateusz
>
> --
> --
> -
> You received this message because you are a member of the Vintage Macs
> group.
> The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and
> our netiquette guide is at http://www.lowendmac.com/lists
> /netiquette.shtml
> To post to this group, send email to vintag...@googlegroups.com
> To leave this group, send email to 

Re: Macintosh 12" RGB Display M1296G owners please help

[zgbapl]

>>  is yours also a US model or an international?

It's an european one. Seems like there are some differences between our 
models. Still, I'd like to see a few close shots of your board.

So if you could take a pic of the following elements, that would be great. 
To make it easier, I'm gonna tell you rough directions (my board is facing 
the flyback down, so the CRT is on my right hand side) and their 
orientation.

R919, R920 - two small ones, center right (under the CRT neck) in close 
proximity of Q905 transistor (with a big heat sink) and two blue disc caps; 
vertical
R521 - near the flyback transformer, slightly above and on the left; 
horizontal
R523 - slightly lower than the previous one; horizontal
R423 - left to the J501 (vertical connector, lots of wires); horizontal
R506 - far bottom left, above H-hold pot; horizontal

Those are the troublesome ones. Please take a picture of the underside of 
the board - even if they are slightly different, I should be able to figure 
out the differences by looking at the connections.

Many thanks.
Mateusz

W dniu wtorek, 30 stycznia 2018 00:19:06 UTC+1 użytkownik The One True 
Stickman napisał:
>
> Mine is an M1296 110V/60Hz US model, no G suffix - is yours also a US 
> model or an international? Some photos linked below, I can pull the boards 
> out if needed.  
>
> https://www.dropbox.com/sh/9s390k8gcva62e4/AABptFdkwVknxSDRcH_zyi40a?dl=0 
> 
>
> On Mon, Jan 29, 2018 at 8:49 AM, zgbapl  wrote:
>
>> Oh, that would be great. If you don't mind, I'd tell you which close-ups 
>> I need the most.
>>
>> BR,
>> Mateusz
>>
>> W dniu poniedziałek, 29 stycznia 2018 14:12:23 UTC+1 użytkownik The One 
>> True Stickman napisał:
>>>
>>> I think I have this monitor, but will have to dig it out of the closet 
>>> to check. If my memory is correct I'd be happy to grab some photos in the 
>>> next couple days
>>>
>>> On Mon, Jan 29, 2018 at 5:22 AM, zgbapl  wrote:
>>>
 Hello there,

 some time ago I got my first Mac ever - an LCII with a 12" RGB Monitor. 
 The whole setup was stored in a moist basement and unfortunately somebody 
 has spilled some washing powder all over it. It turns out that this stuff 
 is even more corrosive than battery acid. The computer itself was in a 
 relative good condition. I had to replace some components, repair two 
 broken traces and give it a good clean and after that it happens to work 
 just fine.

 The monitor is a different story. It was very badly corroded, 
 especially resistors were covered with rust. I have desoldered all of them 
 but a few of them were faulty and I couldn't measure their values. Color 
 bars were either washed out or totally covered with rust. I have figured 
 out most of them but I still have some pure guesses. There's no (useful) 
 service manual or schematic I could use.

 Before anybody tells me no to bother - I know that this stuff is 
 neither vintage nor rare, but I'm really having fun trying to rescue old 
 hardware. Right now I'm at the point where the PCB is totally emptied of 
 any parts and once I fix the traces and cover them back with solder mask, 
 I 
 will start re-populating the board.

 TL;DR - is there anybody out there willing to disassemble his M1296G 
 and take a few photos of the main board?

 Thanks a lot.

 BR,
 Mateusz

 -- 
 -- 
 -
 You received this message because you are a member of the Vintage Macs 
 group.
 The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and 
 our netiquette guide is at 
 http://www.lowendmac.com/lists/netiquette.shtml
 To post to this group, send email to vintag...@googlegroups.com
 To leave this group, send email to vintage-macs...@googlegroups.com
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>>>
>>> -- 
>> -- 
>> -
>> You received this message because you are a member of the Vintage Macs 
>> group.
>> The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our 
>> netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml
>> To post to this group, send email to vintag...@googlegroups.com 
>> 
>> To leave this group, send email to vintage-macs...@googlegroups.com 
>> 
>> For more options, visit this group at 
>> 

Re: Macintosh 12" RGB Display M1296G owners please help

[theonetruestickman]

Mine is an M1296 110V/60Hz US model, no G suffix - is yours also a US model
or an international? Some photos linked below, I can pull the boards out if
needed.

https://www.dropbox.com/sh/9s390k8gcva62e4/AABptFdkwVknxSDRcH_zyi40a?dl=0

On Mon, Jan 29, 2018 at 8:49 AM, zgbapl  wrote:

> Oh, that would be great. If you don't mind, I'd tell you which close-ups I
> need the most.
>
> BR,
> Mateusz
>
> W dniu poniedziałek, 29 stycznia 2018 14:12:23 UTC+1 użytkownik The One
> True Stickman napisał:
>>
>> I think I have this monitor, but will have to dig it out of the closet to
>> check. If my memory is correct I'd be happy to grab some photos in the next
>> couple days
>>
>> On Mon, Jan 29, 2018 at 5:22 AM, zgbapl  wrote:
>>
>>> Hello there,
>>>
>>> some time ago I got my first Mac ever - an LCII with a 12" RGB Monitor.
>>> The whole setup was stored in a moist basement and unfortunately somebody
>>> has spilled some washing powder all over it. It turns out that this stuff
>>> is even more corrosive than battery acid. The computer itself was in a
>>> relative good condition. I had to replace some components, repair two
>>> broken traces and give it a good clean and after that it happens to work
>>> just fine.
>>>
>>> The monitor is a different story. It was very badly corroded, especially
>>> resistors were covered with rust. I have desoldered all of them but a few
>>> of them were faulty and I couldn't measure their values. Color bars were
>>> either washed out or totally covered with rust. I have figured out most of
>>> them but I still have some pure guesses. There's no (useful) service manual
>>> or schematic I could use.
>>>
>>> Before anybody tells me no to bother - I know that this stuff is neither
>>> vintage nor rare, but I'm really having fun trying to rescue old hardware.
>>> Right now I'm at the point where the PCB is totally emptied of any parts
>>> and once I fix the traces and cover them back with solder mask, I will
>>> start re-populating the board.
>>>
>>> TL;DR - is there anybody out there willing to disassemble his M1296G and
>>> take a few photos of the main board?
>>>
>>> Thanks a lot.
>>>
>>> BR,
>>> Mateusz
>>>
>>> --
>>> --
>>> -
>>> You received this message because you are a member of the Vintage Macs
>>> group.
>>> The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our
>>> netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml
>>> To post to this group, send email to vintag...@googlegroups.com
>>> To leave this group, send email to vintage-macs...@googlegroups.com
>>> For more options, visit this group at http://groups.google.com/group
>>> /vintage-macs
>>>
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Re: Macintosh 12" RGB Display M1296G owners please help

[zgbapl]

Oh, that would be great. If you don't mind, I'd tell you which close-ups I 
need the most.

BR,
Mateusz

W dniu poniedziałek, 29 stycznia 2018 14:12:23 UTC+1 użytkownik The One 
True Stickman napisał:
>
> I think I have this monitor, but will have to dig it out of the closet to 
> check. If my memory is correct I'd be happy to grab some photos in the next 
> couple days
>
> On Mon, Jan 29, 2018 at 5:22 AM, zgbapl  wrote:
>
>> Hello there,
>>
>> some time ago I got my first Mac ever - an LCII with a 12" RGB Monitor. 
>> The whole setup was stored in a moist basement and unfortunately somebody 
>> has spilled some washing powder all over it. It turns out that this stuff 
>> is even more corrosive than battery acid. The computer itself was in a 
>> relative good condition. I had to replace some components, repair two 
>> broken traces and give it a good clean and after that it happens to work 
>> just fine.
>>
>> The monitor is a different story. It was very badly corroded, especially 
>> resistors were covered with rust. I have desoldered all of them but a few 
>> of them were faulty and I couldn't measure their values. Color bars were 
>> either washed out or totally covered with rust. I have figured out most of 
>> them but I still have some pure guesses. There's no (useful) service manual 
>> or schematic I could use.
>>
>> Before anybody tells me no to bother - I know that this stuff is neither 
>> vintage nor rare, but I'm really having fun trying to rescue old hardware. 
>> Right now I'm at the point where the PCB is totally emptied of any parts 
>> and once I fix the traces and cover them back with solder mask, I will 
>> start re-populating the board.
>>
>> TL;DR - is there anybody out there willing to disassemble his M1296G and 
>> take a few photos of the main board?
>>
>> Thanks a lot.
>>
>> BR,
>> Mateusz
>>
>> -- 
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>> group.
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>
>

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Re: Macintosh 12" RGB Display M1296G owners please help

[theonetruestickman]

I think I have this monitor, but will have to dig it out of the closet to
check. If my memory is correct I'd be happy to grab some photos in the next
couple days

On Mon, Jan 29, 2018 at 5:22 AM, zgbapl  wrote:

> Hello there,
>
> some time ago I got my first Mac ever - an LCII with a 12" RGB Monitor.
> The whole setup was stored in a moist basement and unfortunately somebody
> has spilled some washing powder all over it. It turns out that this stuff
> is even more corrosive than battery acid. The computer itself was in a
> relative good condition. I had to replace some components, repair two
> broken traces and give it a good clean and after that it happens to work
> just fine.
>
> The monitor is a different story. It was very badly corroded, especially
> resistors were covered with rust. I have desoldered all of them but a few
> of them were faulty and I couldn't measure their values. Color bars were
> either washed out or totally covered with rust. I have figured out most of
> them but I still have some pure guesses. There's no (useful) service manual
> or schematic I could use.
>
> Before anybody tells me no to bother - I know that this stuff is neither
> vintage nor rare, but I'm really having fun trying to rescue old hardware.
> Right now I'm at the point where the PCB is totally emptied of any parts
> and once I fix the traces and cover them back with solder mask, I will
> start re-populating the board.
>
> TL;DR - is there anybody out there willing to disassemble his M1296G and
> take a few photos of the main board?
>
> Thanks a lot.
>
> BR,
> Mateusz
>
> --
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> -
> You received this message because you are a member of the Vintage Macs
> group.
> The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our
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