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): September 1994 - early November 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): late November 1995 - mid 1998
• Models: SCPH-1001, SCPH-1002, SCPH-3000, SCPH-3500, SCPH-5000
• Removed S-Video interface
• New CD DSP (CXD2510Q)
• New CD decoder (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
  • -13 (seeind in DTL-H1102)
  • -21
    • Actual larger changes
    • New GPU that uses SGRAM for video memory
    • New SPU (CXD2925Q)
    • Smaller package for MechaCon
  • -22
  • -23
  • -41
    • One single RAM IC instead of four
  • -42
    • One single RAM IC instead of four

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: 0-369-414-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): May 1997 - April 1998
• Models: SCPH-550X, SCPH-5552, early SCPH-700X, early SCPH-750X
• 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): April 1998 - August 1998
• Models: SCPH-700X
• Smaller form factor (identical to PU-18)
• CD DSP, CD decoder and CD decoder'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): August 1998 - May 1999
• Models: SCPH-750X, SCPH-9903, early SCPH-900X (parallel port hidden behind case)
• Smaller form factor (smaller than PU-18/PU-20)
• SPU integrated with CD-DSP/decoder 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): May 1999 - August 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
    • This sub-revision (and only this sub-revision) has a different footprint for SPU-RAM in a smaller package
  • -51

PlayStation One motherboards

PM-41

• Year(s): June 2000 - Q4 of 2004
• 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 exact same part that is used on PS2 from GH-022 to GH-035 as IOP-RAM)
    • The very last PS1 motherboard, built around 2003-2004 (December 2004 at the latest, date code "4D") and sold until 2006