[TechAssist] Re: [Fwd: Zenith SG5241W (9-912-2 main) dead not usual SMPS parts.]
- From: "Phillip R. Hull" <phil245@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 10 Sep 2001 17:18:51 -0400
Replace do not check Caps esp. the 100mfd
Phillip R Hull
phil245@xxxxxxxxxxxxx
----- Original Message -----
From: "Phil Bader" <philbad@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, September 10, 2001 4:20 PM
Subject: [TechAssist] [Fwd: Zenith SG5241W (9-912-2 main) dead not usual
SMPS parts.]
>
>
>
> -------- Original Message --------
> Subject: Zenith SG5241W (9-912-2 main) dead not usual SMPS parts.
> Date: Mon, 10 Sep 2001 16:19:26 -0400
> From: Phil Bader <philbad@xxxxxxxxxx>
> Organization: Jan Phyl TV Inc.
> To: "CONSUMERELREPAIR-L@xxxxxxxxxxxxxxxxxxxx"
> <CONSUMERELREPAIR-L@xxxxxxxxxxxxxxxxxxxx>
>
> Unit totally dead,no bad fuses, Q3431 OK,all the usual SMPS parts
> (resistors, Q3431, etc) seem OK. Has raw B+ at main filter cap and at
> least one lead of the STR reg IC (223-28). I ESR'd the two P.S. caps,
> replaced the 223-28 IC (STR53041), q3431, IC6300 (opto-iso 162-18-0,
> NTE3041).All seemed OK and no help. Not even the usual chirp when
> plugged in.This is not the typical senereo.That STR IC circuit seems
> dead .
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