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 <z...@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
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