[TechAssist] Re: Magnavox 60P8241,PTV915 proj. shuts off after 1min,gett...
- From: MDileo0000@xxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 18 Nov 2003 15:45:39 EST
Phil,
Does the SSB have that 2.4 volt zener 6301 that goes bad?
Dominic DiLeo
Atlantic TV
Freeport, Maine
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In a message dated 11/18/03 3:24:12 PM Eastern Standard Time,
tjanphyl@xxxxxxxxxxxxxxx writes:
> 2nd Update after calling Philips technical (see my bottom orig post):
> I called Philips,Ken was very helpful.
> I mentioned the shut down after an hour, then half hour,etc, getting
> worse. Also mentioned the channel number OSD bouncing all over the
> screen just before it shut down, then the two blinks of the power button
> LED after shut down.
> Ken did say this is typical of the SSB board (PH313912725881). He says
> the two blinks error means vertical protect.But since the picture was
> stable, and only the OSD flipped vertically, then not a deflection
> issue. That SSB with the micro on it was sending bad signal and
> triggering the vertical protect shutdown. He just about bet the farm on
> that. The OSD flip, stable p[icture, two blinks, all point to that board
> he said.
> I guess I will figure the estimate with the SSB and see.
> I understand with changing the SSB board, convergence has to all be
> redone. I would like some feedback as to the time for that, so as to
> adjust my cost estimate properly.
> And does anyone have the PDF on this? I will need info to enter service
> mode,adjust,etc.
> I will let the group know my results.
> Either cheers or tears!
> ;-)
> Phil Bader
>
>
>
> Update:
> The last time it shut down, I noticed the OSD characters were all over
> the screen jumping. (not the picture, the OSD channel number). Would
> this small "SSB: next to the tuner do this?
> I am just paranoid ordering a 150.00 board as an "experiment".
> I will contunue to selectivle heat areas of the chassis to isolate the
> offending area.
> ;-)
> Phil Bader
> Jan Phyl TV Inc.
>
> Philip Bader wrote:
> >
> > This is in ref to my 60P8241, PTV910 chassis.
> > Since my last post, I pulled the SSB (part# on board: 313912725881/NLA/
> > alt#: PH3912725881. cost 151.62 out, 101.62 exch.)This is the upright
> > board with the white ribbon cable going to an edge connector at it's top
> > edge, this board is located beside the tuner, with SMD electrolytics and
> > flat packs on it.
> > I carefully inspected it and used my Dick Smith ESR cap tester. I found
> > all SMD electrolytics clean, no leaks and acceptable ESR measurements.
> > For the moment I don't think the commonly bad SSB here is the culprit.
> > Customer smokes, and had nasty thick dust all over boards which I
> > vacuumed away.I reinstalled customer's SSB and powered set up.I flexed
> > all boards as it ran, does not seem connection related.It does seem it
> > temperature related. It ran all day until a few hours ago, shut off, and
> > the power button flashes a series of two blinks, pause, then two
> > blinks...
>
> > >
> > > > Philip,
> > > > Just completed a PTV915 with same problem. Replaced
> > > > the SSB, a common problem. You will need to redo the
> > > > convergence after replacing. Also try adjusting the g2
> > > > voltages 1st, in case they are off. I read each of the
> > > > g2 voltages to see if they are the same. Be aware that
> > > > the set will shut off when reading the g2 volts, at
> > > > least they did using a Fluke Model 70. Of course,
> > > > other problems could be causing shutdown. My 3rd guess
> > > > would be to change the LSB if shutdown continues.
>
>
> George
> Johnson TV
>
> > > > --- Philip Bader <tjanphyl@xxxxxxxxxxxxxxx> wrote:
> > > > > Magnavox projection TV model 60P8241, chassis#
> > > > > PTV910, made in 2001.
> > > > > Started out taking several hours of good operation,
> > > > > then it would shut
> > > > > off, LED flashing. After months ,customer said it's
> > > > > taking less time.
> > > > > (30 min).
> > > > > I find very little in the archives on this 2001 year
> > > > > 60" TV.
> > > > > Need any histories or info on this model/symptom.
> > > > > Thanks,
> > > > > Phil Bader
> > > > >
>
>
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>
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