[TechAssist] Re: RCA F31672ET - CTC187CJ - Squeals on plug-in
- From: "Barry Thompson" <barrystv@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 8 May 2004 17:49:21 -0400
The new rca flybacks ring about 37, I have bad ones that rang 25. I spoke to
my sencore rep.and suggested that they should come out with some new guide
lines.
barrystv@xxxxxxx
Barrys TV
Ottawa Canada
----- Original Message -----
From: "Bruce Tiedeman" <btied@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, May 08, 2004 3:35 PM
Subject: [TechAssist] Re: RCA F31672ET - CTC187CJ - Squeals on plug-in
> By the way my flyback rang 43 times with ringer using my Sencore analyst.
> Bruce.
>
> ----- 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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