SCPH 1000 SPU Replacement / no boot

General information to do with the PlayStation 1 Hardware. Including modchips, pinouts, rare or obscure development equipment, etc.
Post Reply
User avatar
SWAGMASTER_69
What is PSXDEV?
What is PSXDEV?
Posts: 1
Joined: Jan 21, 2023
PlayStation Model: SCPH-1000

SCPH 1000 SPU Replacement / no boot

Post by SWAGMASTER_69 » January 21st, 2023, 9:22 pm

Hello everyone!

I stumbleb upon a problem with my SCPH-1000 Unit - it lost almost all in-game audio, only played crackling sounds. Audio CD works great on the other hand. Reading trough forums I have decided to put in another SPU.I wanted to change CXD2922Q to CXD2925Q. To do this, I sourced a SCPH-1002 board.

After some hot-air soldering I was left with a PU-8 board with no SPU at all and a PU-7 board with a newer revision SPU.
Upon booting the console there was no sound again and I found out that I have some cold joints. I tried to solder them down a bit better with a soldering iron instead of air-station and now it won't do anything at all upon boot. No signal, no audio, no nothing. :shrug

The PU-8 board boots perfectly fine even without the SPU chip so i desided to remove it from the PU-7 board again and clean everithing up, however, still - no effect. The console dows nothing upon turning the power on.

Not like i'm that bad on soldering, I inspected the board and cleaned it - no short cicruits that I can see.

What should I do? Maybe there are some blown fuses on the board somewhere?
SCPH-1000 A5623346 PU7-12A

User avatar
nocash
Verified
PSX Aficionado
PSX Aficionado
Posts: 541
Joined: Nov 12, 2012
Contact:

Post by nocash » January 21st, 2023, 11:59 pm

Fuses? Pinouts should be as so https://problemkaputt.de/psxspx-pinouts-spu-pinouts.htm check for yourself if the 3.5V and 5V supplies are there. But be careful that you won't shortcut the supply pins while powered on.

Post Reply

Who is online

Users browsing this forum: No registered users and 4 guests