PSX/Playstation 1 - SCPH-1001 audio/SPU problem

Post a topic about yourself to let others know your skills, hobbies, etc.
Post Reply
Masejoer
What is PSXDEV?
What is PSXDEV?
Posts: 2
Joined: Jul 03, 2021

PSX/Playstation 1 - SCPH-1001 audio/SPU problem

Post by Masejoer » July 4th, 2021, 10:03 am

This is a cross-post from my /r/consolerepair reddit post.

I picked up a SCPH-1001 system (PU-8 board) that looks like it came out of 1995 - not a mark on the console, inside looks flawless, controllers look new, and the included games/cases look new. Boots games fine, but the audio is messed up - worse than the "ringing"/hanging notes I see from others online. Audio CD plays back fine in the cd player. Issue occurs both with RCA outputs and multi-out cable.

I'd like to get this fixed without hacking up the pristine board too much. Putting pressure on different ICs have showed no change in behavior. I've tested each of the IC305/308/310 pins against probe-able points on the board, and everything shows great continuity.

Does anyone have a good direction to go into troubleshooting this further, without just throwing parts at it from another 1001 I have? Just comparing 1001 to 1001 and scoping everything, I could see that taking way too many hours, going in blind. Maybe a specific cap or two that can be checked?

Video of startup sound that demonstrates the sound generation problems: https://www.youtube.com/watch?v=BTc5xnZJUzs

Thanks for any input!
20210703_160641.jpg
You do not have the required permissions to view the files attached to this post.

User avatar
~PSXLoVeR95~
Verified
Active PSXDEV User
Active PSXDEV User
Posts: 73
Joined: Sep 18, 2016
I am a: Huge lover of PS1

Post by ~PSXLoVeR95~ » September 20th, 2021, 9:03 am

CXD2922/CXD2925 broken (SPU).

Replace with another one.
~ My PS Collection ~
4x SCPH-1000
2x SCPH-1001
7x SCPH-1002
1x SCPH-3000
1x SCPH-3500
1x SCPH-5000
1x SCPH-5501
1x SCPH-5502
2x SCPH-7000
2x SCPH-7002
1x SCPH-7500
1x SCPH-7501
2x SCPH-9000
1x SCPH-9002
3x SCPH-102
>>IT'S A SONY

Post Reply

Who is online

Users browsing this forum: No registered users and 4 guests