[TechAssist] Re: (TV) Panasonic CT-32G21U 32" Poor Regulation
- From: "Leonard G. Caillouet" <lcaillo@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 26 Sep 2002 15:27:02 -0400
Check the FBT to see if the G2 and focus controls interact. I had a smaller
Panasonic with a bad FBT that had very similar symptoms.
Leonard G. Caillouet
Service Manager
Electronics World
Gainesville, FL
352-332-5608
352-332-5668 (fax)
----- Original Message -----
From: "Lynn C. Hedspeth, CET(r)" <HedTV@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, September 26, 2002 8:50 AM
Subject: [TechAssist] (TV) Panasonic CT-32G21U 32" Poor Regulation
>
> Panasonic 32" Model CT-32G21U
> Chassis: ALEDP276
>
> I have a 32" Panasonic that will intermittently drop the 130vdc supply
> to as low as 85vdc and pulse with the brightness of the picture.
> Have replaced
> IC801 (STK730-020) twice (Including OEM panasonic part number)
> D807 7.5v zener
> C809 electrolytic off the ref. input to IC801.
> and checked just about everything else, including ringing the switching=
> transformer.
>
> It will regulate with a 60watt lamp subbed for the H/O load, but
> will not start. I have to leave the lamp disconnected until
> supply has started, then attach. With the lamp there is no change
> in current needed so 130v stays constant. The set has no problem
> starting with h/o connected. I guess because until CRT comes up the
> current demand is low.
>
> Anyone out there had this before, please shed some light.
>
> Thanks for your time.
> ****************************************
> Lynn C. Hedspeth, CET(r) NC-407
> Hedspeth Enterprises Inc.
> 3521 E. Hwy 27
> Lincolnton, NC 28092-7659
> 704-735-3532
> 413-828-0216 (fax)
> HedTV@xxxxxxxxxxxxx
> ***************************************
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