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.
Logic Board
Note: Earlier Duo motherboards use a 100uf 10v capacitor in place of the 100uf 25v capacitor. Replacing with higher voltage is fine, so you can just order a 25v cap for either board revision.
| 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 |
Reference Image
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 Image
Module on the left has the leaky cap, module on the right has the non-leaky tantalum cap.
