[TechAssist] Re: RCA 27V530T comes on shuts off
- From: becyn@xxxxxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Wed, 27 Jul 2005 19:30:49 -0400
Theres no standard 'lightning damage" so one can only guess what might
have happened. I'd start with the weakest link, namely the firmware. If
you have a chipper check, run a dead set diagnostic. it might just have
corrupted H freq
parameters.
Jim McVey
----- Original Message -----
From: Electric Medic <info@xxxxxxxxxxxxxxxxx>
Date: Wednesday, July 27, 2005 6:49 pm
Subject: [TechAssist] Re: RCA 27V530T comes on shuts off
> If your set is cycling repeats indefinitely off/on how do you get a
> chanceto see the raster. I have had that symptom many times on the
> ITC008 and you
> can actually hear the HV coming up and see the filaments glowing
> red and
> then off, but I have never seen this symptom allow you to have time
> to turn
> up the raster and see a blank screen. I don't see where Eric's tip
> showscycling repeats indefinitely off/on on this post below where
> he had a
> vertical problem. Either way I have seen the regulator IC or the
> Flybackcause this symptom. I have also seen some that I never
> figured out with this
> same forever pulsing problem. All the ones I have seen once you
> turn the set
> on it pulses forever not 3 times but forever, and you can not turn
> the set
> off unless you unplug AC. I would like to make sure your symptoms
> match what
> I am saying so we can get a handle on this problem and maybe
> together find a
> common fix for this dog set. If we are using similar symptoms and
> solutionsthat will throw us all off on these picky sets. Maybe
> others can input some
> suggestions here on their fixes on this pulsing problem because I
> have seen
> many of these. Also, I have never had all those diodes that are
> listed in
> the Tip programs be bad when this pulsing problem occurs. When they
> are bad
> the set is dead or shutdown once. Also, the bad Flyback where the set
> shutdown one time although I have seen lots of those is not part of
> thisproblem. We need to get a handle on this forever pulsing if we
> can because I
> have seen about twenty of them and about a third were monster dogs.
> Even PTS
> couldn't fix three of them. They sent back we don't know what is
> wrong with
> them. So I am sure all of us are going to see these in future. We
> need to
> find the solution if there is a common bad part or parts here.
> Suggestions???????????Thanks
>
> Perry Bower
> Electric Medic
> "It's Cheaper to Keep Her"
> http://www.electricmedic.com
> 3850 Washington Road Suite 4C
> Martinez, Georgia 30907
> Phone: 706-8MEDIC4 (863-3424)
> Phone: 706-863-3474
> Fax: 706-863-2316
> mailto:info@xxxxxxxxxxxxxxxxx
>
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Eric Manuel
> Sent: Wednesday, July 27, 2005 7:28 AM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: RCA 27V530T comes on shuts off
>
>
> Charlws read this maybe the vert chip at fault...Eric
>
> put this in your notes somewhere it might save you hours of
> work someday.This 24v510t came in going into shutdown after coming on
> and showing what looked like a blank raster out of focus. Audio came
> up before shutdown.The raster looked full so I spent much time looking
> for a video problem. The waveform at the vert yoke looked compressed.
> found n401 rca part no. 263754. The Ic which is the vert. output
> checked only 200 ohms to ground on one of the pins. The set sent me on
> a wild goose chase through the video because the raster appeared to
> fill the screen.I don't know about some of these new sets.-
>
>
> Eric
> E M Electronics
> Deer Lake Nfld
> Canada
> tvman@xxxxxxxxxxxxxxx
>
> repair11 wrote:
> > RCA 27V530T (ITC008)
> >
> > Customer said after storm pix had lines in it. When I pushed
> power hv came
> > up no audio, relay clicked off, a few seconds later back on,cycle
> repeats> indefinitely, turning up G2 shows blank raster. This
> first ITC008 I have
> > seen , a trouble shooting flow chart, a scan of print, or any
> suggestions> would be greatly appreciated.
> >
> >
> >
> > Charles Betzler
> > Best Electronics
> > repair11@xxxxxxx
> >
> >
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