IBM PS/2 P70 PSU

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Preliminary Information
Leak Risk High
Batteries None
Destructive Entry No


Known Issues

Symptom or Problem Encountered

Causes

  • Computer powers up normally and POSTs when turned on after being off for a period of time. If it is turned off and turned on again in short time frame, screen and power light blinks for a second and goes off. No shorts seen on motherboard or through power supply connector

Solutions

  • Full recap of power supply solved this issue and computer starts normally every time. Notably there were no visually obvious bad caps.

Disassembly Notes

- Rivets will need to be drilled out

Original Parts

Basic PCB Name

Capacitor Specifications and Footprint Information
RefDes Capacitance Voltage Mount Diameter/Size Height Lead Spacing Temp Type Brand Series
C009 2.2 µF 400V
C014 47 µF 50V
C016 390 µF 250V
C017 390 µF 250V
C021 2.2 µF 50V
C023 33 µF 25V
C024 1 µF 50V
C103 330 µF 35V
C104 1800 µF 10V
C105 33 µF 250V
C106 1800 µF 10V
C109 1800 µF 10V
C111 47 µF 35V
C112 100 µF 25V
C113 470 µF 16V
C114 1800 µF 10V
C118 10 µF 50V
C120 10 µF 50V
C121 10 µF 50V
C122 2.2 µF 50V
C123 330 µF 25V
C124 2.2 µF 50V
C128 470 µF 16V
C137 10 µF 250V
C204 2.2 µF 50V

Replacement Parts

Basic PCB Name

Capacitors
RefDes Qty Compatible Part Number Order Links
Digikey

If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.

Related Links

References