[TechAssist] Re: Panasonic CTP-3189 apedc214 no vertical
- From: "Dave Routson" <davestv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 26 Jun 2002 10:21:10 -0500
Larry, in checking the schematic, the return loop from
vertical winding on yoke at DY2 feeds back through
the Z board coil L770 and T771 with connections at
Z1-4 in and Z1-3 out of Z board and possibly a loose
connection or cold joint on Z board if coil or transformer
not open. A continuety check would be good all the
way back from the DY2 out of yoke to A71 or R460
junction with R458 and R465 and C454. Jim's note below
may be on track although didn't see any other coil on
picture tube board, just Z board.
Hope this may help.
Dave Routson
davestv@xxxxxxxxxxx
208 Stroud
Cleburne, TX 76033-8738
----- Original Message -----
From: "Jim C." <jwc12@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, June 26, 2002 8:30 AM
Subject: [TechAssist] Re: Panasonic CTP-3189 apedc214 no vertical
I can't remember the exact chassis but I have found open coil located on crt
board on several panasonic/quasar that will kill the vertical deflection.
----- Original Message -----
From: "Cliff Afflick" <sgt.cliff@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, June 25, 2002 11:23 PM
Subject: [TechAssist] Re: Panasonic CTP-3189 apedc214 no vertical
>
> Larry
> Did you check the yoke or its connections?
> Maybe just maybe.
> Cliff.
> ----- Original Message -----
> From: "Larry" <schntv@xxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Tuesday, June 25, 2002 2:45 PM
> Subject: [TechAssist] Panasonic CTP-3189 apedc214 no vertical
>
>
> >
> > help please! I know this sounds easy but,
> > I dont understand what I am missing.
> > I have replaced the vert. IC, 2 times, LA7838.
> > I have 12 v to pin 1 and 28v to pin 8 and 13, supply voltages.
> > I have vertical drive pulse at Pin 2 input.
> > lifted and checked 12 resistors and checked lytics.
> > yoke return path checks continuity.
> > cant get any vertical output.
> > I even injected drive to pin 2 and still nothing.
> > The schematic shows no voltages for most of the pins.
> > I dont know where to turn.
> > Thank you,
> > Larry
> >
> >
> >
> > --
> > Schneider TV & Electronic Inc.
> > 5415 N. Wooster ave.
> > Dover, Ohio 44622 www.geocities.com/schntv2000/
> > 330-343-0768 FCC. first class & Extra class K8WLY
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