[TechAssist] Re: Toshiba PTV - 50HX70 Red convergence flickers in and out.
- From: "LeRoy L. Westlund" <llw@xxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 20 Jan 2006 13:28:41 -0700
What black jumpers, and on which board, Leonard ?
I only see one black jumper on the componant side of the board where the
convergence amps are mounted, and it's OK.
I can't scope it, cause I'm trying to repair it in the home.
LeRoy
Westlund TV & Electronics
97 North Main Street
Centerfield, Utah 84622-0087
Phone/Fax: 435-528-3822
Mailto:LLW@xxxxxxxxxx
" Some days are Diamonds,...somedays are " Stones ".
----- Original Message -----
From: "Leonard Caillouet" <lcaillo@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, January 20, 2006 12:24 PM
Subject: [TechAssist] Re: Toshiba PTV - 50HX70 Red convergence flickers in
and out.
> Resolder the black wire jumpers on the board. Scope the red conv lines
from
> the DCU and see if the effect is seen there. If you can adjust the static
> convergence the output is likely OK.
>
> Leonard Caillouet
> Electronics World
> 1261 NW 76 Blvd
> Gainesville, FL 32606
> 352-332-5608
> 352-332-5668 fax
>
> ----- Original Message -----
> From: "LeRoy L. Westlund" <llw@xxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, January 20, 2006 2:09 PM
> Subject: [TechAssist] Toshiba PTV - 50HX70 Red convergence flickers in and
> out.
>
>
> H i members,
> This Toshiba PTV had a typical bad convergence problem, so I replaced the
2
> STK392-110 output ICs. I checked all the assoiciated resistors, and they
> were OK.
>
> After re-installing the chassis, The Red dynamic convergence is flickering
> in and out, at a rapid rate. The center cross hairs adjust OK on the Blue
> and Red both. The problem only effects the Red around the out side only.
>
> I think the Hyper module is OK on this set, cause it don't have the
surface
> mounted caps in it, that normally go bad. Also, the DCU module seems to be
> working OK, and all connections look good.
>
> Should I try changing the output ICs a second time, since I used Generics,
> from a reliable source ?
> Maybe I got a hold of a bad one.
>
> Any suggestions would be appreciated.
>
> LeRoy
> Westlund TV & Electronics
> 97 North Main Street
> Centerfield, Utah 84622-0087
> Phone/Fax: 435-528-3822
> Mailto:LLW@xxxxxxxxxx
>
> " Some days are Diamonds,...somedays are " Stones ".
>
>
>
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