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Search: Posts Made By: Retrorepair
Forum: support.Hardware 15 February 2021, 09:59
Replies: 22
Views: 1,786
Posted By Retrorepair
That's the third version I've seen of this board!...

That's the third version I've seen of this board! It looks quite different to mine in a lot of places but it would seem the circuit is actually very similar, just a different layout.

The cap...
Forum: support.Hardware 16 January 2021, 10:13
Replies: 22
Views: 1,786
Posted By Retrorepair
That would be great as I believe mine is a...

That would be great as I believe mine is a slightly earlier model (date on the label).

I recon there's going to be a variance in the values of some of the components or maybe I've just missed...
Forum: support.Hardware 15 January 2021, 14:53
Replies: 22
Views: 1,786
Posted By Retrorepair
Sorry mate, we had a baby between my last post...

Sorry mate, we had a baby between my last post and now so my attention has been elsewhere :)

I have made the modifications which appear to be all that differs between my model and the model found...
Forum: support.Hardware 28 December 2020, 12:13
Replies: 22
Views: 1,786
Posted By Retrorepair
Actually the value of the large blue caps would...

Actually the value of the large blue caps would help, I think these relate to brightness in different modes. I can see the bigger one is 3.3uf but can't make the other big one out.

Thanks again...
Forum: support.Hardware 28 December 2020, 11:47
Replies: 22
Views: 1,786
Posted By Retrorepair
Great thanks for that, though it seems yours is...

Great thanks for that, though it seems yours is a later model so most of it is pretty different.

It does seem the sync generation circuit is mostly the same though, any chance you could take a...
Forum: support.Hardware 27 December 2020, 13:19
Replies: 22
Views: 1,786
Posted By Retrorepair
I've found some photos of a multisync chassis...

I've found some photos of a multisync chassis online which has given me some idea of what to change on my 31khz only chassis, though there could easily be more that I've missed or were not obvious...
Forum: support.Hardware 18 December 2020, 17:41
Replies: 22
Views: 1,786
Posted By Retrorepair
It could still be a driver on the neck board but...

It could still be a driver on the neck board but I'd go after dry joints on the bottom PCB where the ribbon cable connects the two or around any transformers/power resistors.

Great thanks, I look...
Forum: support.Hardware 18 December 2020, 08:09
Replies: 22
Views: 1,786
Posted By Retrorepair
I was concerned due to the file size but they...

I was concerned due to the file size but they look fine on inspection :)
Forum: support.Hardware 17 December 2020, 22:00
Replies: 22
Views: 1,786
Posted By Retrorepair
Pictures! Interestingly, even though this...

Pictures!

Interestingly, even though this model is 31khz only, the pots to adjust 15khz geometry still exist!

I have a feeling the forum has killed the resolution so I may find somewhere to...
Forum: support.Hardware 17 December 2020, 17:10
Replies: 22
Views: 1,786
Posted By Retrorepair
When you say bottom PCB do you mean the main...

When you say bottom PCB do you mean the main board? I'd say that's likely the culprit yes. Old caps could be the problem, it can't hurt to replace 25 year old caps anyway :)

It's hard to tell...
Forum: support.Hardware 16 December 2020, 10:10
Replies: 22
Views: 1,786
Posted By Retrorepair
Hi jbenam, excellent news :) I'll take some...

Hi jbenam, excellent news :)

I'll take some pictures this evening, they should indicate which components are missing on mine. I do wonder if some of the shared components will be different values...
Forum: support.Hardware 15 December 2020, 17:03
Replies: 22
Views: 1,786
Posted By Retrorepair
M1438 Pictures

Hi all,

Would anyone with one of these monitors be willing to pop it open to take some decent pictures of the chassis?

I have a 31khz only model here but am 100% certain it's a M1438 that's...
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