[TechAssist] Re: [TV] CTC169 - Dead - FIXED
- From: "Damon" <DamonEB@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 12 Jan 2007 07:19:59 -0500
Whoops! You're right....C4141 is the B+ cap.....
It's located right by the Heatsink, and kinda hard to get out of the board
due to it's location.
Damon B
Telrad Electronics
Fort Wayne IN
----- Original Message -----
From: "John Conti" <contitv@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, January 11, 2007 9:10 PM
Subject: [TechAssist] Re: [TV] CTC169 - Dead - FIXED
> Damon, I'M trying to locate the 180uf on the secondary, I can't find it to
> mark it on my S.M.
> Did you by any chance Mean C4141 A 470 of at 180v I found it.
>
> Thanks
>
>
>
> John
> Conti's TV
> Texas City , Texas
>
>
>
>
>
> >From: "Damon" <DamonEB@xxxxxxxxxxx>
> >Reply-To: techassist@xxxxxxxxxxxxx
> >To: <techassist@xxxxxxxxxxxxx>
> >Subject: [TechAssist] Re: [TV] CTC169 - Dead - FIXED
> >Date: Thu, 11 Jan 2007 20:11:22 -0500
> >
> >Actually the 39uf cap is the one that WHACKS the chopper
transistor....gets
> >leaky, adds DC to the AC signal and just turns that chopper on harder
until
> >it dies a day later....
> >
> >The 2.2 uf, when it dries out causes the standby 143 to rise as high as
> >170V
> >dc....
> >
> >Now there's one other that can mess with you.....It's the 180uf B+ cap on
> >the secondary....I've had 2 or 3 that when they go bad, it won't startup,
> >and measuring the 143V supply in standby you will see it sitting at 143,
> >then it drifts up to 152, then down, then up to 170, then down and it
> >sticks
> >at one voltage for a bit....that's because you get HASH on the DC voltage
> >and it fools your meter...but not a scope....
> >
> >Damon B
> >Telrad Electronics
> >Fort Wayne IN
> >----- Original Message -----
> >From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
> >To: <techassist@xxxxxxxxxxxxx>
> >Sent: Thursday, January 11, 2007 4:42 PM
> >Subject: [TechAssist] Re: [TV] CTC169 - Dead - FIXED
> >
> >
> > >
> > > Peggs,
> > >
> > > I do own a ESR meter and it found several bad capacitors around U4104
> > > (TEA2261). I replaced 2.2uf/100v, 15uf/50v, 39uf/50v and 470uf/50v;
this
> > > brought the TV back to life. I'm lucky because I'm told a stressed
> > > 2.2uf/100v cap can take out the chopper transistor and TEA2261 IC.
> > > Thanks to all who responded, you know who you are.
> > >
> > > David Lessard
> > > Mr_fixit@xxxxxxxxxxxx
> > > Alexandria, Ontario, Canada
> > >
> > > -----Original Message-----
> > > From: techassist-bounce@xxxxxxxxxxxxx
> > > [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of peggs
> > > Sent: Thursday, January 11, 2007 10:32 AM
> > > To: techassist@xxxxxxxxxxxxx; tv@xxxxxxxxxxxxxxx;
> > > techassist@xxxxxxxxxxxxx
> > > Subject: [TechAssist] Re: [TV] CTC169 - Dead
> > >
> > > If you have an ESR meter(get one if you don't)...........check the
Caps
> > > around the TEA2261
> > >
> > > Peggs
> > >
> > > At 08:49 AM 1/11/07, David Lessard wrote:
> > > >Hello Techs,
> > > >
> > > >I have a CTC169 that is dead, the SMPS chopper transistor is intact
and
> > > >so is the HOT, I have no voltage at either end of CR4118; I have 15V
at
> > > >U4101 pin 16. I have parts coming in today, all the caps around
U4101,
> > > >NTE580 (CR4118), TEA2261, etc. I want to be sure about what is
causing
> > > >the problem, does anyone have a troubleshooting flow chart on the
SMPS
> > > >or any tips on what I should be looking for.
> > > >
> > > >Thanks,
> > > >
> > > >David Lessard
> > > >Mr_fixit@xxxxxxxxxxxx
> > > >
> > > >
> > >
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