[TechAssist] Re: GE 20GT425 Turns OFF/ON Repeatedly
- From: HSWAD@xxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Mon, 9 Dec 2002 08:31:39 EST
But you still found it with the hunt and peck method which costs both you and
your customer money. Using your scope would have narrowed that down to 15
minutes or so while the trouble was in progress. I have been telling guys for
years to be a Tech not a tinkerer. Hollis Bates, Field Engineer retired USE
YOUR SCOPE In
a message dated 12/9/02 6:00:01 AM Eastern Standard Time, mrfixit@xxxxxxxxxxx
writes:
> Subj:[TechAssist] Re: GE 20GT425 Turns OFF/ON Repeatedly
> Date:12/9/02 6:00:01 AM Eastern Standard Time
> From:<A HREF="mailto:mrfixit@xxxxxxxxxxx";>mrfixit@xxxxxxxxxxx</A>
> Reply-to:<A
> HREF="mailto:techassist@xxxxxxxxxxxxx";>techassist@xxxxxxxxxxxxx</A>
> To:<A HREF="mailto:techassist@xxxxxxxxxxxxx";>techassist@xxxxxxxxxxxxx</A>
> Sent from the Internet
>
>
>
>
> Symptom:
>
> Cyclic OFF/ON problem (relay clicking) usually after power-up but also
> occured intermittently. The cycle can be stopped by holding the power
> button
> ON during the next OFF/ON cycle, then the TV shuts off normally. The
> problem
> was intermittent, sometimes days between acting up.
>
> Solution:
>
> Found numerous postings regarding CR4118, replaced it. No change. Confirmed
> switch was not the problem by replacing it with another one. No change.
> Re-soldered in and around HOT area, transformers, etc. No change. Further
> investigation revealed several cold solder joints near R118U - 33ohm power
> resistor near CR4118. Visual inpection didn't reveal this problem, the
> joints appeared OK. The problem was discovered by applying pressure to the
> PCB near R118U. This dog is out the door.
>
> Thanks to all who provided input.
>
> David Lessard
> Alexandria Electronics
> 50 Harrison Street
> Alexandria, Ontario
> (613)525-4502
> mrfixit@xxxxxxxxxxx
>
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