MacDat - Capacitor Reference Library

Capacitor Reference - PowerBook 145/145B

The PowerBook 145 has no electrolytic capacitors on the logic board. This means that the only caps you will have to replace will be those on the display, and the display inverter board. There is also a cap on the trackball, but it rarely fails.

Many people end up replacing the display caps with ceramic capacitors. These may work, but have been shown to result in drifting contrast on certain LCD displays. This is caused by ceramic capacitors' characteristic where the capacitance varies based on voltage load. As such, I would recommend replacing them with tantalum caps instead.


Reference Values

LCD

Value Count Type
100uf 6v 1 Surface-Mount Electrolytic
22uf 35v 1 Surface-Mount Electrolytic
3.3uf 35v 9 Surface-Mount Electrolytic

Backlight Inverter Board

The polymer cap rarely fails and doesn't require replacement.

Value Count Type
47uf 16v 1 Low Profile Radial Electrolytic
33uf 10v 1 Low Profile Radial Polymer

Trackball

Value Count Type
10uf 16v 1 Radial Electrolytic

Reference Images

Click on an image to view the full-size version of it.

LCD

Inverter

Trackball

Photo provided by @GRudolf94 on 68kMLA.org



Page last updated (MM/DD/YYYY): 09/30/2024
Update Reason: formatting updated

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