TopJimmy Posted September 4, 2020 Share Posted September 4, 2020 I have a gen 1 Channel F I'm trying to revive. Most electrolytic have been changed and voltages seem good. I am getting video and the built in games start, but it is DOUBLING the graphics a few rows off vertically. I also have a rolling horizontal bar which may be an RF tuning issue. I've cleaned and reseated all socketed chips including the RAM. Any ideas on this? Quote Link to comment Share on other sites More sharing options...
Middleway Posted September 4, 2020 Share Posted September 4, 2020 (edited) Hello, with weird video issues like this I would start with looking at the RAM chips. This seems to be a common failure mode in Channel F, I've seen bad RAM causing missing parts of the graphics, although I haven't seen the doubling problem you're having. With the RAM chips being socketed it's easy to experiment with removing 1 at a time (it will still show some sort of display with 1 of the chips out of the socket), swapping them around, etc and see how it changes. Good luck Edited September 4, 2020 by Middleway Quote Link to comment Share on other sites More sharing options...
TopJimmy Posted September 5, 2020 Author Share Posted September 5, 2020 does anyone know what chips i could use as replacements for a gen 1 ram? the existing chips are labelled 33-9023-00 F 7714. thanks Quote Link to comment Share on other sites More sharing options...
pcrock Posted September 6, 2020 Share Posted September 6, 2020 3 hours ago, TopJimmy said: does anyone know what chips i could use as replacements for a gen 1 ram? the existing chips are labelled 33-9023-00 F 7714. thanks Hi friend. I don't know if it could help you but please take a look here Quote Link to comment Share on other sites More sharing options...
Middleway Posted September 6, 2020 Share Posted September 6, 2020 MK4027N is the RAM type to search for. Quote Link to comment Share on other sites More sharing options...
TopJimmy Posted September 6, 2020 Author Share Posted September 6, 2020 thanks to you both!! Quote Link to comment Share on other sites More sharing options...
pcrock Posted September 6, 2020 Share Posted September 6, 2020 (edited) Unfortunatelly I think that MK4027N will not work. Maybe with some changes in the circuit but I am not sure. Please read the post I sent. Edited September 6, 2020 by pcrock 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.