[TechAssist] Re: CTC-177CN power supply buzz
- From: "Barry Thompson" <barrystv@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 19 Jun 2003 09:50:22 -0400
Yes, There in the feedback circuit. It seems to happen only on the 32 in.
sets
barrystv@xxxxxxx
Barrys TV
613 224 3406
Ottawa.Canada.
----- Original Message -----
From: "Tri-County Tv" <tricountytv@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, June 19, 2003 9:30 AM
Subject: [TechAssist] Re: CTC-177CN power supply buzz
> Barry,
> You nailed it . I replaced those two parts (they checked good out
> of circuit) and now the power supply runs rock steady. Thank You .
> Tom Berger
> Tri-County TV
> Robbinsville
> North Carolina 28771
> (tricountytv@xxxxxxxxxxxxx)
> ----- Original Message -----
> From: "Barry Thompson" <barrystv@xxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, June 18, 2003 11:38 PM
> Subject: [TechAssist] Re: CTC-177CN power supply buzz
>
>
> > If your B+ is going over 200 volts in standby and you have a squeal
Change
> > both C4123 and R4125. you should have about 149 volts in
standby,141volts
> > running. You will also have jagged sides when is running.
> > barrystv@xxxxxxx
> > Barrys TV
> > 613 224 3406
> > Ottawa.Canada.
> > ----- Original Message -----
> > From: "Tri-County Tv" <tricountytv@xxxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Wednesday, June 18, 2003 9:14 PM
> > Subject: [TechAssist] CTC-177CN power supply buzz
> >
> >
> > > Good evening,
> > > I have this 31" rca model F31671SE chassis
ctc177cn
> ,
> > came in dead, replaced U4101 (STK-730-010) with a new one but unsure of
> > where it came from, does not appear to be counterfeit, but after
> installing
> > this ic the set comes on fine, then in about 5 min the picture gets wavy
> > lines in it and eventually the picture goes in and out. When the TV is
off
> > raw 15volt source goes from 15 volts to 20 volts and the b+ goes from
140
> to
> > 212 and then you hear the buzz, turn the set on and the voltages go back
> to
> > normal until you turn it off again. Has anyone seen this problem before
or
> > anything close to it?
> > > Tom Berger
> > > Tri-County TV
> > > Robbinsville
> > > North Carolina 28771
> > > (tricountytv@xxxxxxxxxxxxx)
> > >
> >
>
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