[TechAssist] Re: Fw: Philips 27PT6442 Chassis L04.1U.AA Horizontal tearing
- From: "Phillip R. Hull" <phil245@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 1 Dec 2005 09:27:23 -0500
Horz sync disturbance per Force:
Resolution:
Remove resistors 3442 and 3443 (4.7K carbon composition) for the corner of
the main CBA near the flyback. Replace with wire jumpers.
NOTE: Clean the board material well, top and bottom, before installing the
wire jumpers.
Applies To:
25PT6341/85, 26PW6341/37, 27MS6341/37, 27PT5441/37, 27PT6441/37,
27PT6442/37, 27ST6210/27, 28PW6341/85, 29PT6441/44, 29PT6441/85,
29PT6541/44, 29PT6541/85, 30PW6341/37, 32MS6341/37, 32PT5441/37,
32PT6441/37, 32PT6442/37, 32PW6341/85, 32ST6210/27, 33PT5441/85, L04.1U AA
Phillip R Hull
phil245@xxxxxxxxxxxxx
FAX 517--569-3075
Professional Technicians only
----- Original Message -----
From: "Wally Heise" <sirepair@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, December 01, 2005 1:21 AM
Subject: [TechAssist] Fw: Philips 27PT6442 Chassis L04.1U.AA Horizontal
tearing
> Techs,
>
> I am saying farewell to this dog with no repair. After hours of
> troubleshooting, I give up. I am only sending this email to ask anyone
> whoever gets and fixes one of these to please put the repair tip in the
data
> base as I
> am really curious what the solution is.
>
> The problem is horizontal jitter, or swimming back and forth, actually
> looks like degaus ripple at times. I have replaced all power supply caps
> and
> diodes. Also tried the horizontal driver kit, which was already in this
> chassis once I got the new kit and compared the parts I replaced.
>
> And to think this tv was in warranty when it originally failed (degaus
> thermistor) and the customer never kept the receipt or sent in the
> warranty!!!
>
> Bon Voyage piece of junk!
>
> Wally Heise
> South Isle Repair
> Isle, Mn.
>
> > > ----- Original Message -----
> > > From: "Wally Heise" <sirepair@xxxxxxxxxx>
> > > To: "Tech Assist" <techassist@xxxxxxxxxxxxx>
> > > Sent: Wednesday, November 16, 2005 10:34 PM
> > > Subject: [TechAssist] Philips 27PT6442 Chassis L04.1U.AA Horizontal
> > tearing
> > >
> > >
> > > > Greetings,
> > > > This will be my last attempt to fix this dog. It has horizontal
> > tearing,
> > > jagged edges on sides, video flickering back and forth, throughout the
> > > display. This is more noticeable in the center 2/3 of the crt, but is
> > > everywhere and unacceptable. The original problem with this tv was
> blown
> > > degaus thermistor, which I replaced with the new Philips replacement
per
> > > their instructions. I have the Force schematics for this set but
still
> am
> > > at a lose on where to look for this problem. I have also checked the
> > > updates for this model per Force 32 and they are correct. I have also
> > > replaced the hv flyback.
> > > >
> > > > I notice the Vertical deflection pulse has horizontal frequency
> > parabolic
> > > signal ringing through the low side of the signal. This parabolic
> signal
> > > has an amplitude of about 15 volts peak to peak. I haven't worked on
> one
> > of
> > > these flat screens before and am not sure if these pulses are meant to
> be
> > > there for p/c or some kind of dynamic focus like monitors use.
> > > >
> > > > Anyone have any ideas or suggestions?
> > > >
> > > > Thanks,
> > > >
> > > > Wally Heise
> > > > South Isle Repair
> > > > Isle, Mn.
> > > >
> > > >
> > >
> >
>
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