[TechAssist] Re: PANASONIC CTP-3189SF INTERMITTENT SHUTDOWN

Regulated B+ is correct and doesn't change on a variac 5 volt source and 12
volt source are also good .  the set is not going into hv shut down it is
simply turning off I suspect the abl circuit but can find nothing wrong .
Jim Brown
Norms TV & Computer Service
815 Valley Ave
Sumner Wa
253-863-4521
FAX 253-863-5622
Repair !The Last stop on the way to the land fill
----- Original Message -----
From: "Edward Gaidies" <teltek2@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, August 30, 2002 6:50 PM
Subject: [TechAssist] Re: PANASONIC CTP-3189SF INTERMITTENT SHUTDOWN


>
> Try varying the AC input voltage with the Variac, probably HV shutdown,
look
> to your regulator circuit.
>
> -Ed-
> Tel-Tek Electronics
> Midland, Ontario
> Canada.
> teltek2@xxxxxxxxxxxx
> ----- Original Message -----
> From: "derouin" <derouin@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, August 30, 2002 4:45 PM
> Subject: [TechAssist] PANASONIC CTP-3189SF INTERMITTENT SHUTDOWN
>
>
> > Hello everyone I am working on a panasonic ctp-3189sf with intermittent
> shut off not shut down.  when the set shuts off I can just press the power
> button and it will come back on.  If no antenna connected set will not
shut
> off. when screen control turned up set shuts off.  I measured all voltages
> on ABL cirucit found what appeared to be several leaky transistors (Q312,
> Q313 AND Q302 The ABL Transistor replaced these and set still shuts off
> rechecked all voltages including the 5.0 volt the 12volt and the 140 volt.
> scoped the abl ciruit no changes occur prior to shut down.  replaced ic
301
> AN5304NK Deflection chip for GP. Still shuts off. (SAMS IS 3163 ) I am
kinda
> lost where to go I am hoping some one has had this trouble or can lead me
> back to the right direction
> > thanks
> >
> > Jim Brown
> > Norms TV & Computer Service
> > 815 Valley Ave
> > Sumner Wa
> > 253-863-4521
> > FAX 253-863-5622
> > Repair !The Last stop on the way to the land fill
> >
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