27
Sep
11

Stupid AP-7131 power socket

Hooked up a Motorola AP-7131 to a 300W 48V power supply today… incorrectly 🙂

PAF! Said Motorola.

Usually a bad sign.

As it turned out a fix is surprisingly painless: one 22uF 63V (or more) capacitor  (C403) and one 1 Ohm resistor (R400).

There is also plenty of space so you don’t need SMD components.

This is the cap that blew:

Sorry, no pic of the blown resistor. It’s hard to see anyway, looks almost normal.

And here is the new cap:

And the resistor (it is on the other side):

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