[TechAssist] Re: Need Service Manual for Panasonic PVC2541
- From: HSWAD@xxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Sun, 20 Feb 2005 10:46:00 EST
I solved the lack of blue problem. The lead from P5301 to the kine board was
broken at P5301 on the mother board. Probably from mishandling. Works fine
now except still shuts down after two minutes. Freeze mist next. Hollis Bates,
EE-retired, Lewiston, Maine,HSWAD@xxxxxxx
In a message
dated 2/19/05 8:03:07 P.M. Eastern Standard Time, H SWAD writes:
The year of manufacture is 2001. When the set is first turned on ( with or
without the vcr in place--mode switch in the eject position) the set will run
maybe a minute just fine except like I mentioned,vertical a little too tall
and a lack of blue. Once it shuts down it will turn back on but shut down
within seconds. If you let it cool for ten minutes it will again stay on for a
minute. Since I have no manual I am unable to really tell what is correct
voltage measurement wise. I suspect that freeze mist may tell me something.
Got
it coming from a supplier. really appreciate your help. You've have been
great. Hollis Bates, EE-retired, Lewiston, Maine, _HSWAD@xxxxxxxx
(mailto:HSWAD@xxxxxxx) .
In a message dated 2/19/05 7:44:36 P.M. Eastern Standard Time,
greentron@xxxxxxx writes:
What is the model year? Most of the models for a given year are in one
service manual plus supplements. Also, through my Nesda membership, I can
download any manual that is on the Panasonic site.
The only things that can cause the power to shut off are emergency inputs to
the micro, power overloads, or timing or mode problems from the vcr. Vcr
problems should cause shutdown within 10 seconds or so. The overcurrent
shutdown is from deflection problems.
Jerry Silverman
Greentron Inc
4 Newland Ave Greenville SC 29609
Fax/Phone 864 232 3889
greentron@xxxxxxx
----- Original Message -----
From: <HSWAD@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, February 19, 2005 3:57 PM
Subject: [TechAssist] Re: Need Service Manual for Panasonic PVC2541
>
> The chip in this one is a different number but probably works in the same
> manner. I monitored the over current line on this one( which is pin 89)
and saw
> no change before it shut off. I am now looking into the lack of a blue
signal
> to the blue kine driver transistor. Seems to be missing from the output
of
> the video processor. That may very well be the source of my trouble. I'll
keep
> posting what I find. Meanwhile thanks a bunch. Hollis Hates, EE-retired,
> Lewiston, Maine, _HSWAD@xxxxxxxx (mailto:HSWAD@xxxxxxx)
> In a message
dated
> 2/19/05 3:38:54 P.M. Eastern Standard Time, greentron@xxxxxxx writes:
> Closest manual I can find is PVC2540. year 2000 model. IC6001 pin 82 goes
> high on "overcurrent detect" and pin 61 goes low on "power supply power
> down". The chip is a D784928YG10.
> Jerry Silverman
> Greentron Inc
> 4 Newland Ave
> Greenville SC 29609
> Fax/Phone 864 232 3889
> mail to: greentron@xxxxxxx
> ----- Original Message -----
> From: <HSWAD@xxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Saturday, February 19, 2005 9:03 AM
> Subject: [TechAssist] Re: Need Service Manual for Panasonic PVC2541
>
>
> >
> > Yes, it still does the same thing Jerry.I monitor the shutdown line
(pin 1
> > of IC6001-I'm assuming) and nothing seems to change there. While it is
on
> the
> > vertical has overscan but I don't know the procedure for getting to
the
> > servicing mode so I don't know whether that is a mis-adjustment or not.
> One thing
> > I did notice is that there is a lack of blue in the picture, not
> completely,
> > but a lack of, and the collector voltage on the blue driver is 214
volts
> like
> > the source voltage. The red and green collectors are about 132 volts.
> Thank
> > you so much for your interest.
> > Hollis Bates, EE-retired, Lewiston, Maine, _HSWAD@xxxxxxxx
> (mailto:HSWAD@xxxxxxx)
> > In a message dated 2/18/05 9:32:16 P.M. Eastern Standard Time,
> > greentron@xxxxxxx writes:
> > Does it do that with the CRT socket unplugged?
> > Jerry Silverman
> > Greentron Inc
> > 4 Newland Ave Greenville SC 29609
> > Fax/Phone 864 232 3889
> > greentron@xxxxxxx
> >
> > ----- Original Message -----
> > From: <HSWAD@xxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Friday, February 18, 2005 2:27 PM
> > Subject: [TechAssist] Need Service Manual for Panasonic PVC2541
> >
> >
> > > A service Manual in the PDF version for a Panasonic PVC2541 would be
> most
> > > appreciated. TV is destined to be donated to a school after repair.
The
> > trouble
> > > is that the unit shuts down within two minutes. While on it is
normal.
> Has
> > > to stay off five minutes before it will stay on any length of time
> after
> > that.
> > > Hollis Bates, EE-retired, Lewiston, Maine, _HSWAD@xxxxxxxx
> > > (mailto:HSWAD@xxxxxxx)
> > >
> > >
> >
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