[TechAssist] Re: [Fwd: Symphonic 20" TVCR SC3919 ("V" version,1999) dead,squeel from smps]
- From: "Jeff Dougherty" <jeff@xxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 27 Sep 2001 16:07:32 -0400
Phil,
Look for a bad cap near main board voltage reg.
Jeff www.9-11-2001tragedy.com
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----- Original Message -----
From: "Phil Bader" <philbad@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, September 27, 2001 12:39 PM
Subject: [TechAssist] [Fwd: Symphonic 20" TVCR SC3919 ("V" version,1999)
dead,squeel from smps]
>
>
>
> -------- Original Message --------
> Subject: Symphonic 20" TVCR SC3919 ("V" version,1999) dead,squeel from
> smps
> Date: Thu, 27 Sep 2001 12:39:28 -0400
> From: Phil Bader <philbad@xxxxxxxxxx>
> Organization: Jan Phyl TV Inc. Winter Haven, Fl. Estab. 1976
> To: "CONSUMERELREPAIR-L@xxxxxxxxxxxxxxxxxxxx"
> <CONSUMERELREPAIR-L@xxxxxxxxxxxxxxxxxxxx>
>
> When plugged in,I hear a faint, hi-pitched squeel from the power supply
> area.Unit otherwise dead. No shorts found,ESR'd all caps in the PS,seem
> OK.Has the RAW B+,and the only secondary voltage I find after the SMPS
> transformer is +15V. No 5V, etc. This is the type chassis with the SMPS
> on the side of the main board,and a seperate deflection board mounted up
> on the side. I unplugged three connectors (ribbon cables) CN602 from
> SMPS area to defl. PCB and CN503/504 from main board,rear, to defl board
> and CRT board. I thought this would isolate the problem.This does not
> change the squeel or condition. Since the SMPS shares a common main
> board, I suppose there could be a chassis short. Amy help is needed!
> (BTW, HOT checks ok)Even tho I ESR'd SMPS caps,maybe one is weak with
> good ESR?-Phil
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>
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