[TechAssist] Re: Magnavox 60P8241,PTV915 proj. shuts off after 1min,getting worse]
- From: Philip Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: "techassist@xxxxxxxxxxxxx" <techassist@xxxxxxxxxxxxx>
- Date: Tue, 18 Nov 2003 15:08:14 -0500
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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