"Peter K" wrote in message
...
Ok, Step further now.
With both the fan and light disconnected (but power applied), checked with
a DC Voltmeter the voltage going to the IR receiver (and the single chip
on the controller board). Getting a nice stable 6 volts.

But when i press a button to turn the fan on, the voltage drops to about 3
volts (within 2 seconds).
During the time that the voltage is dropping, the receiver still responds.
but after that 2 sec time, it no longer responds.

There is 1 transistor that runs the light circuit, and 3 transistors for
the fan circuit. Pulling the 3 fan transistors, and then trying, the
voltage does not drop, and the receiver keeps on responding.

Looks to me like the trannies are drawing to much power, and loading down
the low voltage.

The circuit does not have any transformer, so it looks like it has another
way of reducing the mains voltage down to the 6v.

I have replaced all the caps I had stock of, and all the resistors check
within range.
Can anybody venture at a guess of whether there is a problem in the tranny
stage, or in the power reducer (not being able to supply current under the
load of the chip driving the trannies)

Thanks
P



The power supply is probably a mylar capacitor and a zener diode. Try
changing that capacitor, if it's bad, the psu cannot supply enough current.