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Capcom Hyperdyne sidearms pcb - No sound

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Shinydaz View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Shinydaz Quote  Post ReplyReply Direct Link To This Post Topic: Capcom Hyperdyne sidearms pcb - No sound
    Posted: 03 Jan 2018 at 5:04pm
I've had this one for a while, it's just missing the sound.
After checking the z80, eprom and ram in the sound section, I moved onto the ym2203 sound chips located at 1D and 3D
These proved signals that go to the ym3014 sound chips at 1c, 3c.

After a while I noticed the clock was missing at pin 39 of the ym2203 @ 1d, this provides the clock to pin 5 of the ym3014 at 1c.  After swapping out the ym2203 it's now fully working.












Edited by Shinydaz - 03 Jan 2018 at 5:32pm
Hunting for a pole position !!
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karlcdoe View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote karlcdoe Quote  Post ReplyReply Direct Link To This Post Posted: 05 Jan 2018 at 10:52am
Nice. I don't suppose you have a lonk to the schematics for this pcb? I've just remmebered I have one to fix and a quick google produced a lot of schematics but for something more deadly than a pcb Dead
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Shinydaz Quote  Post ReplyReply Direct Link To This Post Posted: 05 Jan 2018 at 12:12pm
Hunting for a pole position !!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote karlcdoe Quote  Post ReplyReply Direct Link To This Post Posted: 05 Jan 2018 at 4:07pm
thanks... bit of an obvious place to overlook really.
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