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Issues and support for the xstation optical drive emulator
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No start up sounds or sound effects in game (bgm is fine)? #335

Closed deelowe closed 5 months ago

deelowe commented 5 months ago

I'm having an odd issue with my xstation install. There is no start up sounds and when I play a game, only background music is played, no sound effects. I think my installation is pretty good. I checked everything over with a loop and a multimeter using the test points diagram. I tested from the xstation header to points on the PS1 PCB (not just solder points on the xstation board). My system is a late pu-8.

Can someone who is more familiar with the PS1 architecture point me in the right direction to troubleshoot? I have oscope, good multimeters, soldering station, etc. Just not sure where to start. It's also possible the PS1 has an issue and it's just a coincidence that I started having issues when I installed the xstation. Either way, help would be greatly appreciated.

Thanks.

PXL_20240121_034002691

lf94 commented 5 months ago

It'd be good to get a pic of the lifted pins too

deelowe commented 5 months ago

Lifted pins:

PXL_20240121_163809976

PXL_20240121_163627528

ramapcsx2 commented 5 months ago

The issue as you describe it is clearly related to the SPU (CXD2925) or its RAM chip. Using your scope, you could try to probe all the signals around the SPU when it runs, looking for any clearly misshaped digital signals, which I often find in these situations. Example of exactly that: https://imgur.com/09S9Tts

deelowe commented 5 months ago

@ramapcsx2 thanks. Is the issue unrelated to the xstation? Trying to isolate things. The PS1 has never been recapped and has definitely seen some wear so I wouldn't be surprised if something has gone bad.

ramapcsx2 commented 5 months ago

Yep, it's chip damage on the SPU. The xStation doesn't touch it :p

deelowe commented 5 months ago

Yep. Chip appears bad. Thanks for the help. Closing this issue as it's not related to the xstation.

ramapcsx2 commented 5 months ago

I want to add that it's sadly at elevated levels with PU-8 boards. Whenever I have a random PU-18, I'm sure that it'll work. With PU-8, I just "hope" :p