[TechAssist] Re: Toshiba Md# TP50F61, TAC9675

  • From: "Damon" <DamonEB@xxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Sun, 01 Jan 2006 07:54:07 -0500

The resistors are consistant across all 3 yokes, disconnect the yokes for a
good reading.....then if need be, lift the questionable resistor along with
another resistor on another yoke line. Off the top of my head it may be 2.2
ohm, and generally you will find that to ground.....there is a equalizing
resistor connected across the yoke, that is also what you're reading....I
generally start with yokes disconnected looking for abnormal  resistances in
comparison to the other 2 yokes. Then isolate further...

Damon B
Telrad Electronics
Fort Wayne IN
----- Original Message -----
From: "Premium Technologies" <premtech@xxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, January 01, 2006 6:49 AM
Subject: [TechAssist] Re: Toshiba Md# TP50F61, TAC9675


> Damon you might just have hit the nail on the head, thank you...  Can
anyone confirm for me
> the value of R7726...  I'm guessing 2.2ohm 3w but the bandings look more
like 20 ohm and it
> reads 0.62ohms
> Bill
>
> William Rayburn, CET
> Premium Technologies
> PO Box 442
> Long Beach, WA. 98631
> 360-642-4993
>
> ----- Original Message -----
> From: "Damon" <DamonEB@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Sunday, January 01, 2006 12:33 AM
> Subject: [TechAssist] Re: Toshiba Md# TP50F61, TAC9675
>
>
> That sounds more like the large resistors for the yoke's ground path are
> open.
> Damon B
> Telrad Electronics
> Fort Wayne IN
> ----- Original Message -----
> From: "Premium Technologies" <premtech@xxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Sunday, January 01, 2006 2:11 AM
> Subject: [TechAssist] Re: Toshiba Md# TP50F61, TAC9675
>
>
> > Thanks for the feedback Al, I took a third look and I don't think that's
> my problem.  I'm
> > thinking maybe the driver Q719, which is a TA75559P different than the
> other two which are
> > Motorola chips.  Although I'm not quite convinced that the driver would
> allow the red to
> > adjust up/down and not left/right. In the convergence menu with the grid
> on the screen red
> > is acutely bowed in from both sides. I'm also thinking it could be a bad
> or corrupted eprom
> > Q713...
> > I could really use a schematic and parts list here if anyone has one.
> Otherwise I'll call
> > Toshiba on Tuesday and see if I can get through to technical.
> > Thanks again Al, much appreciated.
> > Bill
> >
> > William Rayburn, CET
> > Premium Technologies
> > PO Box 442
> > Long Beach, WA. 98631
> > 360-642-4993
> >
> > ----- Original Message -----
> > From: "Al Gutz" <alg@xxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Saturday, December 31, 2005 6:02 PM
> > Subject: [TechAssist] Re: Toshiba Md# TP50F61, TAC9675
> >
> >
> > Bill
> >   I am not sure of the model but I recall a toshiba of about that
vintage
> > where one of the traces that goes by a large ground trace below the heat
> > sink for the STKs was either open or had carboned the board over the the
> > ground trace causing a short. I replaced the STKs twice before I found
> > the short.
> >
> > Al G
> >
> > Premium Technologies wrote:
> > > Hi Guys,
> > > Need a service manual on this one or at least the schematics and parts
> list.  This unit
> > > came in dead.  Replaced the convergence amps and got it back up and
> running, but red is
> > > out of alignment and will not move left or right.  It will adjust up
and
> down though.
> > > I checked Toshiba site and didn't find the manual for this on their
> site.
> > > Help appreciated.
> > > Bill
> > > William Rayburn, CET
> > > Premium Technologies
> > > PO Box 442
> > > Long Beach, WA. 98631
> > > 360-642-4993
> > >
> >
>
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