View Single Post
  #4   Report Post  
James Sweet
 
Posts: n/a
Default TV takes about a minute to turn on


"Tim Chreptak" wrote in message
.. .
Thanks, I removed the 4 diodes, none were open but one didn't check out
exactly like the others so I replaced all 4. I also removed and re-checked
the bypass caps around there and everything seems fine, but when i look at
the wave going to the large capacitors it looks totally unrectified. It's
from about 0V up, but I'm sure thats just because the cap's are working as
much as they can to maintain some DC.

Is it possible this is more complicated than I'm thinking and its feedback
from somewhere further down, not from the main PS? it's 60Hz (i don't know
why i thought it was 120Hz yesterday) as much as I can tell from reading

the
scope. I really wish i had a schematic, that would at least give me a
chance...

I would think something is really loading down the supply but I have a 1A
fuse inplace of the recommended 3.15A and it hasn't blown once yet, nor

does
the input resistor get hot. Those caps however seem to discharge almost
instantly.

Thanks again for any comments, ideas, criticisms, etc.




Well the fact that it gets better as it warms up really points to a
capacitor somewhere, perhaps you're barking up the wrong tree and it's
somewhere in the horizontal section. Look closely for any that may be
bulging at the top or leaking, and you could try a can of freeze spray, wait
until the set comes up then give each electrolytic a quick shot and see if
it shuts down.