[TechAssist] Re: Zenith SC2793P,HV stays ON,Early digital manf:1986

  • From: kevinstv <kevinstv@xxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Thu, 03 Oct 2002 19:46:51 -0700

Have you checked for a shorted relay?

Kevin Wilks
Kevin's TV and Video Repair
Penticton BC Canada
kevinstv@xxxxxxx
----- Original Message -----
From: "Ron Miller" <rlmbkm@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, October 03, 2002 1:45 PM
Subject: [TechAssist] Zenith SC2793P,HV stays ON,Early digital manf:1986


>
> SMPS: 9-370-06
> Sweep: 9-367-07
> Main: 9-535
>  Cust wants fixed,came in dead growling noise,replaced caps on SMPS that
> read high esr.Set comes on now pix and sound good (bose audio).
>  When one tries to turn off sound raster video all goes off but set still
is
> producing HV,filaments are on.Have replaced the 121-1040 and 121-1145
> transistors on SMPS pcb have no print or flowchart can't figure out what
> should turn off the 26vdc feeding horiz drive circuit.Am using J2 digital
> training manual TP 46 as a guide SMPS is similar to a 9-628.Anyone
remember
> this dog?Tia
>
> Country TV
> Ron Miller
> 484 FM444 S.
> Inez,TX 77968-5002
> V.(361)782-6419. F.(361)782-9149
> e-mail: rlmbkm@xxxxxxxx
>
>
>
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