Capacitor Reference - PowerBook 150

The PowerBook 150 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, the trackball, and the display inverter board. Failing inverter board caps can introduce inconsistent backlight/contrast behavior even after the LCD itself has been recapped.


The LCD used on the PowerBook 150 uses some sneaky surface-mount electrolytic capacitors. They're encased in plastic, and as such can easily be mistaken as tantalum capacitors. They aren't, and can still fail and should be replaced. The 150 shipped with 2 different LCDs, one by Sharp and one by Casio. Both use the same cap values and have the same amount of them.


The LCD capacitors are frequently replaced 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.

LCD

Inverter Board

Trackball

Reference Images

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

Trackball photo provided by @GRudolf94 on 68kMLA.org




Page last updated (MM/DD/YYYY): 04/21/2024
Update Reason: added newnav

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