Build Your Own Arcade Controls Forum
Main => Monitor/Video Forum => Topic started by: vintagegamer on September 26, 2012, 02:24:38 pm
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Hello all,
I'm trying to nail down a remaining glitch in a G07 CBO I have in my Moon Patrol. After about 15 min of power up, the screen gets the jitters, almost like if you messed with the H Freq pot. It lasts for about 30 secs and then goes away. Prob is, it happens while you're playing a game and it messes up the graphics so bad you can't see well enough to keep playing through it, so you end up dying.
I did a cap kit from Bob Roberts and although the screen looks much better, this jitter still continues. There are 3 caps I did not install, because the originals are under a metal plate down at the front of the chassis (when it's installed in the machine) and I didn't know how to get that thing off. I used all of the rest of the caps in the kit, including the one that needed to on the neck board.
I have reflowed the solder on the 2 sync header connectors in the upper left corner (the 3-pin and 6-pin), and I also reflowed the solder on the header going to the yoke.
Again, it's a super minor glitch, but it's just enough to piss you off when you're playing! I only have one other game that I think has a G07 in it, and it's my Robotron. I'm nervous to pull the G07 from that though to put in my MP because obviously I don't want my Robotron to start having issues as a result.
If anyone can provide any suggestions I would greatly appreciate it. I almost wonder if it's a bad ground because the ground straps are cut in different places in the cab. If someone could tell me how to appropriately ground the chassis and/or tube, I will happily give it a try and see if that fixes the issue.
Thanks in advance,
VG
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Forgot to mention I have a B+ voltage of 119.2v