[TechAssist] Re: Zenith A50M84W1 severe bow all sides,flipping
- From: "jonas miglinas" <miglinasj@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 4 Feb 2006 15:07:50 -0600
I just had what you described on a different Zenith module. Check the =
secondary diodes that have a1 ohm resistor from the flyback, found open =
resistor(diode ok). That resistor and diode went to the vertical ic.
Jonas Miglinas
Miglinas TV
Chicago
----- Original Message -----=20
From: "Philip Bader" <pbader@xxxxxxxxxxxxxxx>
To: "Techassist" <techassist@xxxxxxxxxxxxx>
Sent: Saturday, February 04, 2006 6:51 AM
Subject: [TechAssist] Zenith A50M84W1 severe bow all sides,flipping
> I need your help:
> I had to go look at a 50" Zenith of a friend Thursday night.I sold it =
to
> him last year as unclaimed for the repair ticket. Turned it on, and I =
see a
> severly bowed,pulled in rapidly flipping picture. It is so unstable I =
am
> not sure of it is a comvergence issue.I need advice.
> Model: Zenith A50M84W1
> deflection/power board: 9-1978
> convergence output module: 9-1690-1
> The 9-1690 uses two STK392-110 ICs.
> I don't remember if this symptom is a bad converg 9-1690, and if so, =
are the
> two STKs bad?
> I am quickly forgetting my symtom/cures. I have my shop computer torn =
down
> in storage,gave away all my schmatics,etc.
> What do you think?
> Of course I reminded he and his wife I no longer am on open account, =
have
> sold my parts, given away my diagrams and boxed up my gear. Still =
"could you
> just look at it?"
> I hurt all Friday from laying on my sides behind it. Oh, I resoldered =
the
> two STKs and no help. She said it was intermittant.Took 30 minutes,now
> constantly that way.
> Philip Bader
> Polk County School Board
> Electronics Shop, Bartow,Fl.
> (former owner, Jan Phyl TV Inc.,Winter Haven, Fl. from 1976-2006)
> email: pbader@xxxxxxxxxxxxxxx
> phone # given by request
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