Capacitor Reference - PowerBook Duo 250
The Duo 250 must be fully recapped. Running one on original caps introduces a high risk of the cap goo causing a short circuit, leading to the logic board being permanently destroyed.
The 250's LCD does not use any electrolytic caps. I do not know if the inverter board does or not.
Reference Values
Logic Board
| Value | Count | Type | Diameter | Height |
|---|---|---|---|---|
| 330uf 16v | 1 | Surface-Mount Electrolytic | 10mm | 10mm |
| 100uf 35v | 3 | Surface-Mount Electrolytic | 10mm | 10mm |
| 100uf 25v | 2 | Surface-Mount Electrolytic | 8mm | 10mm |
| 33uf 25v | 1 | Surface-Mount Electrolytic | 6mm | 6mm |
Trackball
Earlier revisions of the Duo trackball have a single leaky cap on them - one of those "impostor tantalum" caps that's actually an electrolytic. The later revisions use a 22uf 10v tantalum cap instead.
| Value | Count | Type |
|---|---|---|
| 10uf 6.3v | 1 | Low Profile Surface-Mount Electrolytic |
Reference Images
Click on an image to view a full resolution version of it.
Logic Board
Trackball
Module on the left has the leaky cap, module on the right has the non-leaky tantalum cap.
Page last updated (MM/DD/YYYY): 03/19/2025
Update Reason: page rewritten
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