Capacitor Reference - PowerBook 140

The PowerBook 140 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. I currently do not have the values for the inverter board caps. They are through-hole, and while they can fail, the rate at which they do is lower than the LCD caps. There is also a single low failure rate cap on the trackball. I'd recommend replacing them all regardless though.

The display 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

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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