[TechAssist] Re: Westinghouse TV, Model WTV12505, Shutdown
- From: gulftech@xxxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 15 Nov 2001 10:07:37 -0600
Huds,
Thanks for the post. It was C404 as both you & Don suggested. I sent a
"FIXED" post yesterday, but you may have missed it. I won't forget that
one for a while!
Ken Smith
Gulf Technical Services
3034 Gulf Breeze Parkway
Gulf Breeze, FL 32561
850-934-8324 (Voice) 850-932-0819 (Fax)
-------------
On Thu, 15 Nov 2001 08:00:23 -0800 "HUDS" <huds@xxxxxxxxxxxxxxxxx>
writes:
>
> I had that problem a few days ago and found C404 andc418 to be the
> problem hope this helps huds
>
> HUDSONS ELECTRONICS
> Leroy Hudson
> 1649SO.Byron Butler pkwy
> Perry.Fl.32348
> Ph:(850)584-7271
> Fax:(850)524-7267
> Email:huds@xxxxxxxxxxxxxxxxx
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Don Hartigan
> Sent: Tuesday, November 13, 2001 9:55 AM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: Westinghouse TV, Model WTV12505, Shutdown
>
>
> Ken;This is a DAEWOO cloneCHASS#CN2001,Mod#DTQ26,27,29S1FCN
> Change C404 =1ufd/160v,it's open probably.Replace with a 3.3/250V
> with
> 105
> degree C. check at D403=TP10 for 103vdc which should always be
> there.This
> tells you your power supply is working.If not check R805&R806 in
> power
> supply.ALSO a good idea to check all 800 series transistors in
> supply...hth...Don of HARTS-TVCR
> ----- Original Message -----
> From: <gulftech@xxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Tuesday, November 13, 2001 1:01 PM
> Subject: [TechAssist] Westinghouse TV, Model WTV12505, Shutdown
>
>
> >
> > Friends,
> >
> > This set goes into shutdown. Trouble is, usually plays four three
> or
> > four days before failing. The set will then not turn on unless
> unplugged
> > first.
> >
> > The ONLY thing I know of that will cause this is the HV shutdown
> circuit.
> > For those without Sams 4068, the circuit is simple. Voltage from
> the
> > flyback is rectified by D405, filtered by C414, and sent through
> voltage
> > divider R414 & R415. The voltage at the junction of R414-R415 is
> fed
> > through 9.1V zener D401 to p24 of the signal processor. There is a
> > resistor RC 401 & cap C401 from p24 to ground. If the voltage at
> that
> > junction exceeds 9.1, the unit will shut down.
> >
> > Problem is the set is so darned intermittent. I monitored the
> voltage
> > applied to the zener for hours. Never found it rise above 7.4
> volts.
> I
> > have checked all components listed above, but changed none.
> >
> > This set is driving me crazy. Any suggestions?
> >
> > Thanks,
> >
> >
> > Ken Smith
> > Gulf Technical Services
> > 3034 Gulf Breeze Parkway
> > Gulf Breeze, FL 32561
> > 850-934-8324 (Voice) 850-932-0819 (Fax)
> >
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