[TechAssist] Re: update2: RCA P60752EB, PTK169PEC intermittant video:goes black, has sound

  • From: "tvservice" <tvservice@xxxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Fri, 22 Apr 2005 14:19:59 -0500

you can bypass PIP module for a test, at p8003 connector cut wire #1 and #8
(chroma in and out) joint them. Do the same thing wire #3 and#6 (luma in and
out).
Robert
tvservice@xxxxxxxxxxxxx
H & H Electronics Inc


----- Original Message ----- 
From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, April 22, 2005 11:30 AM
Subject: [TechAssist] Re: update2: RCA P60752EB, PTK169PEC intermittant
video:goes black, has sound


> Yes, even while video is black(with a bit of distorted parts), I can
> still hit menu and see the OSD, as well as that video output jack I
> mentioned is good. I noticed a lot of PIP mentions, but this is a very
> large PIP module, called "Spip-511". I don't think this is the one with
> the rubber feet that goo up.I opened it and theres a smaller PCB inside
> but no rubber.
> Phil
>
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
>
>
>
> Larry E wrote:
>
> >Phil, does OSD/Menu work? TV video & Switched video both go through the
> >comb filter & spip module, check  C6445 in comb filter, it may be cracked
or
> >have poor solder, value is 2700pf, Larry E
> >Larry Eastman
> >American TV & Electronics
> >Crystal River, Fl. 34428
> >----- Original Message -----
> >From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
> >To: <techassist@xxxxxxxxxxxxx>
> >Sent: Friday, April 22, 2005 9:51 AM
> >Subject: [TechAssist] update2: RCA P60752EB, PTK169PEC intermittant
> >video:goes black, has sound
> >
> >
> >
> >
> >>I went back and saw the cracked corner of main board and traces  around
> >>location A-26. I repaired two traces but I still have this
> >>vertical-video flashing.
> >>Note: I hooked up my VP301 pattern gen to  the set's composite "video
> >>in-1" and my pattern shows the disturbance. S-video input shows it as
> >>well but not quite as bad. Funny, but this set has a video output jack
> >>"video select out". I attached an RCA cable from that to my composite
> >>monitor. Picture is unaffected and good at all times from this output!
> >>So, wherever this jack pulls the video from the TV must be before the
> >>trouble. I am concentrating on vertical at this point. (help!)
> >>Phil Bader
> >>
> >>Phil Bader wrote:
> >>
> >>
> >>
> >>>I pulled the chunk and benched it.Slid the main board out and
> >>>over,studied the bottom under high magnification. I found no cracks
> >>>mentioned or bad traces so far. What I did find was at the junction
> >>>where the yellow yoke wire solders to the board,( location terminal ID
> >>>"E502" ) and R523, a distinct ring crack all around both wire and
> >>>resistor . Had to use good light and my nerdy magnifier hood with both
> >>>lenses down! Tho I never actually saw a vertical collapse during the
> >>>effect, I bet  what I saw with the video flashing was the TV
> >>>safety-blanking the video as this connection arced.  Make sense? Will
> >>>let you know.
> >>>Phil Bader
> >>>
> >>>Phil Bader wrote:
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>>Customer said this intermittant problem happens more now:
> >>>>Sound stays OK.
> >>>>I've seen it: Video intermittantly sort of streaks, then goes, leaving
a
> >>>>black screen. Not the HV,it stays... this is definately just the
> >>>>composite video picture. I'm testing this on the cable tuner input
now,
> >>>>not sure if it happens on any other inputs (just got here).
> >>>>I'm a tech from the 1970's and this looks like the symptom where a
> >>>>breakdown switch is dirty and you moved it causing the video to jump
> >>>>out, or a video peaking coil is opening. Kind of a static lines to the
> >>>>right across the screen then black.Any histories on video loss like
this
> >>>>on these? (intermittants like these are difficult to nail down)
> >>>>Phil Bader
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
>
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