[TechAssist] Re: RCA F31672ET - CTC187CJ - Squeals on plug-in
- From: "Barry Thompson" <barrystv@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 7 May 2004 12:09:29 -0400
David You can series a100 watt light bulb between the B+ and the B+ pin on
the flyback,if the flyback is bad it will be real bright and it will protect
your HOT.
barrystv@xxxxxxx
Barrys TV
Ottawa Canada
----- Original Message -----
From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, May 07, 2004 6:55 AM
Subject: [TechAssist] Re: RCA F31672ET - CTC187CJ - Squeals on plug-in
> SMPS is working just fine, +B is 145VDC in standby. Replaced HOT, turned
> TV "ON" and heard two snaps then the HOT blew again. Could this snapping
> sound be an arcing flyback? Problem is test this problem, I really can't
> adjust the +B because it's a SMPS. If I could limit the +B I could then
> monitor the current, shutting down the +B before the HOT blows. Is there
> any other way to check if the flyback is bad, I don't have REAL flyback
> ringer, just my oscillator and scope.
>
> David Lessard
> Alexandria Electronics
> mr_fixit@xxxxxxxxxxxx
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of tvservice
> Sent: Friday, May 07, 2004 2:54 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: RCA F31672ET - CTC187CJ - Squeals on plug-in
>
> CR4106 #243636 diode
> U4101 STK730-030 #223948 reg ic
> Should I also come over and take the back off for you?
> :>) he he
> hth
> Robert
> tvservice@xxxxxxxxxxxxx
> H & H Electronics Inc
>
>
> ----- Original Message -----
> From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, May 06, 2004 1:08 PM
> Subject: [TechAssist] RCA F31672ET - CTC187CJ - Squeals on plug-in
>
>
> > This TV squeals upon plug-in. I know there's a short somewhere causing
> > the chopper PS to squeal, question is where? Does anyone know what the
> > common causes for this problem are? I don't have the TV on the bench
> yet
> > and I'm asking this question in advance.
> >
> >
> > Thanks in advance.
> >
> >
> >
> > David Lessard
> >
> > Alexandria Electronics
> >
> > 50 Harrison Street
> >
> > P.O. Box 1366
> >
> > Alexandria, Ontario.
> >
> > Canada
> >
> > K0C-1A0
> >
> > mr_fixit@xxxxxxxxxxxx
> >
> >
> >
> >
> >
> >
> >
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