[TechAssist] Re: [TV] CTC169 - Dead - FIXED
- From: "John Conti" <contitv@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 11 Jan 2007 20:10:15 -0600
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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