Modifying the X-10 PF284 Power Flash

Introduction

I have successfully completed this modification four times, however, and I accept no responsibility for the effects of anyone making these modifications.   You follow these instructions at your own risk.

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.

Modification Steps

  1. Open the module by removing the four screws and take out the PCB (Printed Circuit Board)
  2. Change the big, usually blue, 2.2uF 250V capacitor normally marked "2E225" to 1uF 400V polyester.
  3. Change the small, usually blue, 0.22uF 250V capacitor normally marked "2E224" to 0.1uF 400V polyester.
  4. If the 330k resistor close to the incoming power is a 0.25W, change it to 330k 0.5W.
  5. 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.

If you attempt these modifications, please let me know your results, and read the warning on the X-10 and 115V & 230V  page.

Comments received at Redoak

None so far.


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