Motherboards

Overview

This list might be incomplete, so feel free to add your own board if you own one that is not in this list.

Note: Model numbers were initially not synchronized across regions until the SCPH-550X series. E.g. the european launch consoles (SCPH-1002 series) mostly use the same board (PU-8) as most of the japanese SCPH-3000 series consoles, since this was the current board revision at the time the PlayStation launched in europe (very few exceptions where sony used an older board in some very early units may or may not exist).

PlayStation motherboards

PU-7

• Year(s): 1994 - 1995
• Models: SCPH-1000, early SCPH-1001, very early SCPH-3000/SCPH-3500, probably few very early SCPH-1002
• Has three potentiometers on board: RV701 (focus gain), RV704 (focus bias), RV705 (sled motor voltage)
• 7-pin PSU
• Sub-revisions: 1-655-322-XX
  • -11
    • initial release
  • -13
  • -13A
  • -14
  • -14A
  • -15
  • -16

PU-8

• Year(s): 1995 - 1996
• Models: SCPH-1001, SCPH-1002, SCPH-3000, SCPH-3500, SCPH-5000
• Removed S-Video interface
• New CD DSP (CXD2510Q)
• New CD controller (CXD1815Q)
• Has three potentiometers on board: RV701 (focus gain), RV702 (push pull), RV704 (focus bias)
  • Pads for RV705 (sled motor voltage) do exist but are unpopulated
• 7-pin PSU
• Sub-revisions: 1-658-467-XX
  • -11
    • Mostly based on PU-7-16 with slight changes regarding the drive electronics
  • -12
  • -21
    • Actual larger changes
    • New GPU that uses SGRAM for video memory
    • New SPU (CXD2925Q)
    • Smaller package for MechaCon
  • -22
  • -23
  • -41

PU-9

• Year(s):
• Models: DTL-H1201 (and others?
• 7-pin PSU
• Not used in retail consoles
• Further reading: https://strefapsx.pl/forum/psx-konsola/dtl-h1201-wczesny-debug-prasowy/
• Sub-revisions: 0-369-4414-XX
  • -02

PU-16

• Year(s): 1996-1997
• Models: SCPH-5903
• Only sold in Asia (without Japan)
• Special version with daughter board for VideoCD decoding (MP-45)
• Has circuitry for mixing output of the VideoCD board with output of the GPU
• Mostly based on PU-8 (-21 and up)
• Has three potentiometers on board: RV701 (focus gain), RV702 (push pull), RV704 (focus bias)
  • Pads for RV705 (sled motor voltage) do exist but are unpopulated
• 7-pin PSU
• Sub-revisions: 1-665-191-XX
  • -11

PU-18

• Year(s): 1996 - 1997
• Models: SCPH-5001, SCPH-550X, SCPH-5552, early SCPH-700X, early SCPH-7501
• Removed all audio/video connectors except the multi-A/V port
• Smaller form factor
• New CD DSP (CXD2545Q) that now includes the servo controller
• Automated focus adjustment
• Has single potentiometer on board: RV703 (push-pull adjustment)
  • Pads for RV701 and RV702 do exist but are unpopulated
• 5-pin PSU
• Sub-revisions: 1-664-537-XX
  • -11
  • -21
  • -31
  • -41
  • -52
  • -62
  • -72
  • -82
• -31, -41, -72, -82 have a single system RAM chip; -11, -21, -52, -62 have 4 system RAM chips

PU-20

PU-20 Top

PU-20 Bottom

• Year(s): 1997 - 1998
• Models: SCPH-700X
• Smaller form factor (identical to PU-18)
• CD DSP, CD controller and CD controller's RAM combined into single chip (CXD1817R)
• No components on bottom side anymore
• Automated focus adjustment
• Has single potentiometer on board: RV703 (push-pull adjustment)
  • Pads for RV701 and RV702 do exist but are unpopulated
• 5-pin PSU
• Sub-revisions: 1-668-413-XX
  • -12
  • -22
    • One system RAM chip instead of 4
  • -32
  • -42

PU-22

PU-22 Top

PU-22 Bottom

• Year(s): 1998 - 1999
• Models: SCPH-750X, early SCPH-900X (parallel port hidden behind case)
• Smaller form factor (smaller than PU-18/PU-20)
• SPU integrated with CD-DSP/controller into single large chip (CXD2938Q)
• No dedicated audio-DAC anymore (SPU combo chip is outputting analog audio)
• Fully automated CD drive adjustment
• Has no potentiometers on board (values set automatically by drive electronics)
• 5-pin PSU
• Sub-revisions: 1-671-858-XX
  • -11
  • -12
  • -21
  • -22
  • -32

PU-23

PU-23 Top

PU-23 Bottom

• Year(s): 1999 - 2000
• Models: SCPH-900X
• Removed the parallel port
• Smaller form factor (smaller than PU-22)
• Fully automated CD drive adjustment
• Has no potentiometers on board (values set automatically by drive electronics)
• 5-pin PSU
• Sub-revisions: 1-674-987-XX
  • -11
  • -21
  • -31
  • -41
  • -51

PlayStation One motherboards

PM-41

• Year(s): 2000 - 2006
• Models: SCPH-10X
• Removed the serial port
• Fully automated CD drive adjustment
• Has no potentiometers on board (values set automatically by drive electronics)
• Sub-revisions: PCB Part No. formatting/prefix differs
  • -11
  • -21
  • -31
  • -41
  • -51
  • -61
    • SGRAM integrated into single chip with GPU
  • -71
    • Also known as PM-41 (2)
    • Slightly smaller
    • Audio-RAM integrated into CD/SPU-chip (CXD2941R)
  • -82
    • Also known as PM-41 (2)
    • Different package/footprint for RAM
    • The very last PS1 motherboard, built around 2003-2004 (at least) and sold until 2006