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Help! Game Board Repair (Super Pang)
CHRIS-F:
It looks like my victory was short lived :-((
My youngest son was playing it for a while and the sound went funny, most of the sound works but it sounds at though one of the channels has gone down, and when I tried it again today its making some noises when starting up that shouldn't be there and failed to boot again, I just don't know where to look for an intermittent fault like that.
could the missing sound problem be the LM324A maybe? if so where can I get a replacement? can I trust the ones on ebay? also could it have something to do with the M5205 again can I trust the ones on ebay manufactured in Thailand? could it even be the YM2413?
I'm sorry I bought the board now it must have been cheap for a reason, my problem is the board is not even worth the hourly rate for someone who knows what their doing to look at it, I don't really have a clue :-(
If those few chips are not to be trusted from ebay, where can I find alternatives in the uk?
Thanks,
Chris.
opt2not:
You could start by replacing the caps in the audio circuit. They're usually all clustered together. By the looks of your previous picture, the top-left section looks to be the audio area.
Given that this is a bootleg, there aren't going to be any hard to obtain custom IC's you need to worry about. So I would just try to rebuild the audio circuit, simple components at a time.
yotsuya:
Try the sound amp chip. I’ve replaced two of those on different boards and that solved sound issues
Mike A:
That fixed my vanguard board.
CHRIS-F:
--- Quote from: yotsuya on June 24, 2019, 06:35:28 pm ---Try the sound amp chip. I’ve replaced two of those on different boards and that solved sound issues
--- End quote ---
Which one is the sound Amp? the LM324A or do you mean the actual amplifier which looks like a Voltage regulator TDA something or other? I was thinking the LM324A as it's a quad op amp and that would make sense if it's amplifying 4 separate channels and one has gone down, but if the TDA amp has died there wouldn't be any sound would there?
Thanks,
Chris.