[TechAssist] Re: Dead Zenith M#Z25X22S
- From: "GJCHAMBERS" <gjchambers@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 19 Sep 2001 22:01:08 -0300
this was a reply to the orig shutdown problem. a short(000 ohms) from b-e
can kill the horiz drive.just a thought,
gary
Gary Chambers
Chambers T V
Bradenton,Florida
Since 1982
----- Original Message -----
From: "Shoreline Electronics" <jstielau@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, September 19, 2001 10:30 PM
Subject: [TechAssist] Re: Dead Zenith M#Z25X22S
>
> Is it a dead short or are you reading the B-E resistor (approx 50 ohms)?
>
> Jeff Stielau
> Shoreline Electronics Repair
> 125 Beechtree Lane
> Westbrook,CT 06498
> 860-399-1861 Voice
> 860-664-3535 Fax
> jstielau@xxxxxxxx
>
> ----- Original Message -----
> From: "GJCHAMBERS" <gjchambers@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, September 19, 2001 5:02 PM
> Subject: [TechAssist] Re: Dead Zenith M#Z25X22S
>
>
> >
> > i have found the horiz output shorted from base to emitter, and base to
> > collector is ok,
> > coll. to emitter ok as well, but will not start up if this short is
> present.
> > gary
> > Gary Chambers
> > Chambers T V
> > Bradenton,Florida
> > Since 1982
> > ----- Original Message -----
> > From: <gulftech@xxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Wednesday, September 19, 2001 12:53 PM
> > Subject: [TechAssist] Re: Dead Zenith M#Z25X22S
> >
> >
> > >
> > > Dan,
> > >
> > > Had a friend from another shop call me yesterday who just fixed a
Zenith
> > > with problems like you describe. It was a bad vertical output IC. I
> had
> > > seen that on several Philips sets, but may see it on others now, too.
> > >
> > > I pass this along with the hope that it helps.
> > >
> > >
> > > Ken Smith
> > > Gulf Technical Services
> > > 3034 Gulf Breeze Parkway
> > > Gulf Breeze, FL 32561
> > > 850-934-8324 (Voice) 850-932-0819 (Fax)
> > >
> > > -----------------------
> > >
> > >
> > > On Tue, 18 Sep 2001 19:54:41 -0500 "Webster TV" <webstertv@xxxxxxx>
> > > writes:
> > > >
> > > > Need help on this Zenith, unit is dead, relay clicks and in about 5
> > > > seconds
> > > > it sounds like it goes into shutdown. Checked all voltages and
> > > > waveforms in
> > > > power supply, nothing seems to be way off, when set shutsdown set
> > > > looses the
> > > > 14.7v and 9v source voltage, 5v source stays OK. Defeated shutdown
> > > > circuit
> > > > according to SAMS instructions, by removing diode DX3006 from
> > > > circuit, set
> > > > still shutsdown. Tried disconnecting tuner as have had problem with
> > > > tuner
> > > > causing same symptom, but didn't help.ANY SUGGESTIONS!
> > > > Also have checked transisters in power supply and horiz.circuit.
> > > > Dan
> > > > Webster
> > > >
> > > > Webster's TV
> > > >
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>
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