PF284 - Power Flash Interface

This module has a small transformer to generate the low voltage used to detect a contact closure on the input terminals. However, this transformer is driven by a transistor oscillator which gets it power from the output of the capacitor power supply. It does not cause any problems in this case but one must always investigate how these kind of things work.

Open the module by removing the four screws and take out the pcb (Printed Circuit Board).

Change the big, usually blue, 2.2uF/250V capacitor normally marked "2E225" to 1uF/400V polyester.

Change the small, usually blue, 0.22uF/250V capacitor normally marked "2E224" to 0.1uF/400V polyester.

If the 330k resistor close to the incoming power is a 1/4W, change it to 330k 1/2W.

Change the MOV close to the incoming power from 130V RMS to 250V RMS if you have 220V and to 275V if your power supply is 230 or 240V.

Change the incoming plug or use an adapter, reassemble.

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