[TechAssist] Re: Magnavox 25TS52C303
- From: tvdoctors@xxxxxxxxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: 30 Nov 2001 12:52:49 -0800
Pin 3 of the regulator is around 15volts until I turn the set on, then goes to
149-150volts. Pin 2 is 150 volts when set is on.
> ** Original Subject: RE: [TechAssist] Re: Magnavox 25TS52C303
> ** Original Sender: "Jim Myers" <jr.myers@xxxxxxxxxxx>
> ** Original Date: Fri, 30 Nov 2001 15:01:36 -0500 (EST)
> ** Original Message follows...
>
> Have you replaced the 3.3uf 200v C431 yet? It is from R431 to ground off pin
> 2 of IC410. I recall seeing this cap causing no regulation in older sets
> using the same regulator IC. Also check D420 connected between pins 4 and 2
> of IC410. This chassis should come on with about 15v on the 130v source in
> standby, then go to 129v when turned on.
> Jim Myers
> jr.myers@xxxxxxxxxxx
> ----- Original Message -----From: <tvdoctors@xxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, November 30, 2001 2:31 PM
> Subject: [TechAssist] Magnavox 25TS52C303
>
>
> > Chassis # 25X605 I'm perplexed on this one. Set is not regulating. It
> comes on with B+ Voltage running at around 149 volts. I tried new and used
> STR30130 regulators (I heard about the bad new ones) and checked just about
> everything in the power supply. Can't get it to 130 volts. Any suggestions,
> Neil
> >
> >
> > TV Doctors 108 W. Main St. Monroe,Wa. 98272 360-794-6469
> >
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>** --------- End Original Message ----------- **
>
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