[TechAssist] Re: Dead Zenith M#Z25X22S
- From: "Quenton Kilgore" <qtronics@xxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 19 Sep 2001 20:15:07 -0700
HELLO!
You are probably measuring the damper that is inside the transistor. B_E
should read 50 to 60 ohms out of circuit and will sometimes read a dead
short in circuit. Because you are actually reading the coil in the IHVT.
Thank You
Quenton Kilgore
7470 8th Ave.
Nampa, ID.
83686
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Shoreline Electronics
Sent: Wednesday, September 19, 2001 6:31 PM
To: techassist@xxxxxxxxxxxxx
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
> > >
> > > Help make your TechAssist online repair tips
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