Re: Philips Plasma cutting out when hot



Check that the diodes are screwed down tightly. One loose screw and
you'll get these symptoms.

Also try putting a scope on the common-cathode end of the 3.3V diodes.
You may have one or both diodes failing.


Also try jumpering each capacitor in the 3.3v supply one at a time.
You're likely to find the problem in seconds that way.

.



Relevant Pages

  • Re: Measurement vs. Simulation
    ... will put through the transformer a nice 120Vspike of 3ms duration. ... Well it seems this particular scope has separate paths for DC and AC ... protection diodes. ... I've seen these spikes in all sorts of rectifier ...
    (sci.electronics.design)
  • Re: Tektronix model 2220 power supply problem ...
    ... in my scope there are black diodes and blue diodes on the ... peak inverse voltage. ... I've mostly used it on 2213/15s where the pre-reg was a separate PCB,where ...
    (sci.electronics.repair)