[TechAssist] Re: Proscan CTC 169bg5 shut down
- From: Philip Bader <philbad@xxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 29 Jan 2002 15:24:03 -0500
check cathode of cr4118 for at least 13vdc if too low replace you can
use nte580 also check voltage at collector of hot should be 135-150vdc
Tomlee wrote:
>
> Hello fellow tech.
> I am working with ctc 169bg5. with the help with other techs Perry, JBC.I
> force to turn on the tv by apply 5v at base of
> Q4306. But the tv show a sign of on and off cycle. I do not hear the sound
> of high voltage . I use the sencore to ring the
> flyback by one end of probe to the B+ and the other end to colector of HOT
> as sencore manual direction. But Get zero
> ring .If I remove cr402 and L803 I will get maximum 30 rings.(The HOT
> colector connect to ground by 2 diode CR 401 and cr402 ). I means If The
> HOT collector connect to ground or connect to pincustion circuit(through
> L803) It will make zero ring on flyback test.Does this means somthing wrong
> at pincushion ckt or B+ to ground ckt . I measure no short to B+. .
> May be it is only short to horizontal frequency?.Any Ideas from experince
> tech is appriciated.I spend too much time for this .
> Dang TVCR
>
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