[TechAssist] Re: RCA F31672ET - CTC187CJ - Squeals on plug-in

What kind of resistance do you have on the Collector of the HOT? Do you have
anyway to check your timing on the HOT or the timing caps?
Al Marquardt
ampm@xxxxxxx
Al Marquardt Electronic Repair
206 W Main
Girardville Pa. 17935
----- 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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