Jump to content

Fairchild Channel F gen 1 video problem


Recommended Posts

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?


Link to comment
Share on other sites

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 by Middleway
Link to comment
Share on other sites

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.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Create New...