naujoks Posted November 9, 2023 Share Posted November 9, 2023 The image looks like on the attached picture. It's flickering, like as if there's a sync issue. I note that the picture is spread out on the entire horizontal width, which is not supposed to be the case, of course. I recapped the board and neck board, without any difference. The board is looking clean otherwise, with none of the nasty glue spread out, which I've seen before on other monitors. There doesn't seem to be any pot to adjust H or V sync, and the other pots don't seem to have anything to do with this problem. Many of them are stupidly placed underneath the tube. I haven't found a place where to check B+ and I also don't know how many V it's supposed to be. Any ideas what I could try? Quote Link to comment Share on other sites More sharing options...
developerdude Posted January 25 Share Posted January 25 I'm having a very simular problem when connecting a SM124 to a Atari 1040STFM. Now when connecting a color monitor it works just fine. Did you find a fix or input from the community? thanks IMG_8200.MOV Quote Link to comment Share on other sites More sharing options...
developerdude Posted January 25 Share Posted January 25 I'm having a very simular problem when connecting a SM124 to a Atari 1040STFM. Now when connecting a color monitor it works just fine. Did you find a fix or input from the community? thanks Quote Link to comment Share on other sites More sharing options...
naujoks Posted January 25 Author Share Posted January 25 Yes. There actually is a pot for horizontal hold on the PCB. Adjusting it fixed image. The problem comes back after a while though. Maybe the pot needs cleaning or replacing. Either way, the problem is connected with that pot. Quote Link to comment Share on other sites More sharing options...
developerdude Posted February 5 Share Posted February 5 Can anyone tell me where exactly is the horizontal POT control is on the monitor circuit board? These are the only ones I have found... Quote Link to comment Share on other sites More sharing options...
naujoks Posted February 5 Author Share Posted February 5 There should be one on the top right, pretty much right under the picture tube. It's almost impossible to adjust with the monitor assembled and switched on. Quote Link to comment Share on other sites More sharing options...
developerdude Posted February 7 Share Posted February 7 That's great!! Very big thanks - this is an AWESOME community!! Quote Link to comment Share on other sites More sharing options...
developerdude Posted February 18 Share Posted February 18 On 1/25/2024 at 3:53 AM, developerdude said: No fix - Yes on community input - I have tried adjusting every control on the monitor circuit board. I'm having a very simular problem when connecting a SM124 to a Atari 1040STFM. Now when connecting a color monitor it works just fine. Did you find a fix or input from the community? thanks IMG_8200.MOV Quote Link to comment Share on other sites More sharing options...
Like us on Facebook
Follow us on Twitter
AtariAge on Instagram
Watch us on YouTube
Chat on Discord
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.