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

  • From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Sat, 8 May 2004 08:36:19 -0400

Bruce,
An application of HV putty or "Glypt" over the pin hole will seal these.

Jeff
--
Intrepid Video TV/VCR Repair
263 S Front St, Steelton PA 17113
717-939-7708; (F) 717-564-4952
www.intrepid-video.com  www.tech-repair.net
----- Original Message ----- 
From: "Bruce Tiedeman" <btied@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, May 08, 2004 7:38 AM
Subject: [TechAssist] Re: RCA F31672ET - CTC187CJ - Squeals on plug-in


David, I am working on the same chassis now. I removed the flyback to test
properly with a ringer test. It tested good. When the plastic laminate of
the flyback breaks down most of the time the ringer check will test OK.. I
put a new output transistor in and when the set tried to start their was
arcing from the top of flyback between core and H.V lead like Tony says.
Quality of these small flybacks is poor and they try to drive these bigger
picture tubes with a little unit does not work for long.
My point is , even if you could test the flyback it might test good but in
fact be the problem. They go for $67 at Global . I wanted to order one from
the U.S but by the time you pay delivery and brokerage would be almost that
price.
good luck,
Bruce.

B&T Electronics
139 Margaret St
Sarnia Ontario
Canada
N7T 2Y3
519 344 1850

----- 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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