-----Original Message-----
From: "simon" <simonjhanlon@btopenworld.com>
To: <vectorlist@vectorlist.org>
Date: Sat, 8 Jul 2006 19:36:41 +0100
Subject: VECTOR: Star Wars shaky video
> Hi Guys
> I have been repairing a Star wars pcb that I bought off ebay. I dead so I removed the avg board and self test started to work. I checked the avg board and found some damaged traces, repaired them and the board now passes all test and plays fine except the video is shaky. In self test you can see small steps in the vertical lines on the grid screen. I guess its a bad cap somewhere in the Y section but I can't find it. Has anyone had this fault before? I have checked all the caps have both legs still intact, no noise on the +15 or -15 lines.
>
could be power - you should recap anything that old anyway.
that said, i assume your using a testbench psu that should flatline like a deadman.
last time i saw a fault like that it turned out to be a bad dac, dac failures seem common on atari pcb's judging by the number i have with sockets fitted or missing chips.
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Received on Sat Jul 8 22:47:55 2006
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