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.
|
|
|
| | |
|
|
|
| |
televisio_新浪博客
televisio_新浪博客,televisio
|
|
|
So there may be a compatible part out there.
Cheers,
Keith
On Monday, 5 March 2018, 17:26:11 GMT, zgbapl <z...@o2.pl> 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 <zg...@o2.pl> 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 <zg...@o2.pl> 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 <zg...@o2.pl> 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, <theonetru...@gmail.com> 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 <zg...@o2.pl> 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 <zg...@o2.pl> 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 <zg...@o2.pl> 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
Support for older Macs: http://lowendmac.com/services/
---
You received this message because you are subscribed to the Google Groups
"Vintage Macs" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to vintage-macs...@googlegroups. com.
For more options, visit https://groups.google.com/d/ optout.
--
--
-----
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
Support for older Macs: http://lowendmac.com/services/
---
You received this message because you are subscribed to the Google Groups
"Vintage Macs" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to vintage-macs...@googlegroups. com.
For more options, visit https://groups.google.com/d/ optout.
--
--
-----
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
Support for older Macs: http://lowendmac.com/services/
---
You received this message because you are subscribed to the Google Groups
"Vintage Macs" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to vintage-macs...@googlegroups. com.
For more options, visit https://groups.google.com/d/ optout.
--
--
-----
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
Support for older Macs: http://lowendmac.com/services/
---
You received this message because you are subscribed to the Google Groups
"Vintage Macs" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to vintage-macs...@ googlegroups.com.
For more options, visit https://groups.google.com/d/ optout.
--
--
-----
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
Support for older Macs: http://lowendmac.com/services/
---
You received this message because you are subscribed to the Google Groups
"Vintage Macs" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to vintage-macs...@ googlegroups.com.
For more options, visit https://groups.google.com/d/ optout.
--
--
-----
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
Support for older Macs: http://lowendmac.com/services/
---
You received this message because you are subscribed to the Google Groups
"Vintage Macs" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to vintage-macs...@googlegroups. com.
For more options, visit https://groups.google.com/d/ optout.
--
--
-----
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 vintage-macs@googlegroups.com
To leave this group, send email to vintage-macs+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/vintage-macs
Support for older Macs: http://lowendmac.com/services/
---
You received this message because you are subscribed to the Google Groups
"Vintage Macs" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to vintage-macs+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
--
--
-----
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 vintage-macs@googlegroups.com
To leave this group, send email to vintage-macs+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/vintage-macs
Support for older Macs: http://lowendmac.com/services/
---
You received this message because you are subscribed to the Google Groups
"Vintage Macs" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to vintage-macs+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
