| Modifying the PF284 PowerFlash
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.
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 0.25W, change it
to 330k 0.5W.
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
240 volt modifications page. |
Redoak
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