[TechAssist] Re: Zenith Z52Z95D 9-1674 no video, red crt blurry/smeared convergence issues; 1/2 fixed
- From: "Larry E" <videotech@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 24 Jun 2005 22:42:52 -0400
Al, resoldered all the pins where it attatches to the 1674 module today when
I replaced
the 120K`s on the 3 crt boards, got a tip today to re-solder the pins on the
top
of the board (filament connections), I`ll try that next timeI get into the
set,
saw a post from Bob Waterman to Mando who has a Zenith projo with a 9-1978
module in
it and that board is almost identical to the 1674, both have daughter board,
both have same fly
and Bob`s 2nd tip says to paralell a 12K resistor to RX3209 because the
replacement fly`s
intermittently open the 16v winding and kill the video, but I can`t find a
3209 resistor on my board and the tip
failed to say where it was located off the fly, same symptom as mine, loses
video(filaments go out)
after 20-30 minutes, shutting down and turning back on brings the tubes back
up, it may be that the
1679 module calls RX3209 some other number, I`ll have to contact Bob and see
if he knows, Thanks
for the help, Larry E
Larry Eastman
American TV & Electronics
Crystal River, Fl. 34428
----- Original Message -----
From: "al m" <ampm@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, June 24, 2005 9:37 PM
Subject: [TechAssist] Re: Zenith Z52Z95D 9-1674 no video, red crt
blurry/smeared convergence issues; 1/2 fixed
> Did you check the daughter board for bad solder. I got a rebuilt board
that
> nobody resoldered the daughter board.
> Al Marquardt
> ampm@xxxxxxx
> Al Marquardt Electronic Repair
> 206 W Main
> Girardville Pa. 17935
> ----- Original Message -----
> From: "Larry E" <videotech@xxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, June 24, 2005 5:44 PM
> Subject: [TechAssist] Re: Zenith Z52Z95D 9-1674 no video, red crt
> blurry/smeared convergence issues; 1/2 fixed
>
>
> > Hi Guys, went out and replaced all 3 of the 120K resistors (R5102`s) on
> > the
> > 3 crt boards and got
> > back the red, no more green bleed around the letters at the bottom of
CNN,
> > and the horizontal
> > blue and red convergence bar is back (never lost the vertical), BUT I
> > still
> > lose the video after 25 minutes
> > of running perfectly, actually I found out today that the filaments are
> > going out, hence no video, so it looks like
> > I have a high voltage issue?? This is a rebuilt module so it seems
strange
> > that both 9-1674`s would have the
> > same problem, after the set loses the filaments the set can immediately
> > be
> > turned off and right back on and the
> > set will run again with perfect sound and picture, I checked the 2 pin
> > plug
> > that sits in front of the daughter board
> > and it is NOT 47-52K it reads 55.6K is this far enough off to possible
> > indicate a bad splitter? Seems strange that
> > the set can be turned off & immediately back on and the picture comes
> > right
> > up if the splitter was bad, any ideas
> > would be appreciated, Larry E
> > Larry Eastman
> > American TV & Electronics
> > Crystal River, Fl. 34428
> > ----- Original Message -----
> > From: "Larry E" <videotech@xxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Thursday, June 23, 2005 12:50 PM
> > Subject: [TechAssist] Zenith Z52Z95D 9-1674 no video, red crt
> > blurry/smeared
> > convergence issues
> >
> >
> >> Hi Guys, This Z52Z95D has the 9-1674 sweep and 9-1690 converg boards,
> > complaint was no video has sound,
> >> replaced the 9-1674 module, set came up fine, but video was not good,
> >> when
> > the weather channel, CNN, etc.
> >> puts up letters there is a green haze around the letters, put up the
> > customers cross hatch and the red & blue
> >> horizontal is missing (from top of screen to bottom) the green is
there,
> > all 3 colors are there vertically(left to right)
> >> pulled R3243 behind the horiz. heatsink the 110K and R3244 the 82K as
> >> this
> > is a known failure for the horiz.
> >> convergence bars missing, they are both good out of circuit, looked
into
> > the lenses and the red video is smeared/
> >> washed out looking, this does not show up on the screen?? sprayed R5102
> > with freeze mist and red crt went blank,
> >> sprayed same resistor on green crt board and green blanked out, I did
not
> > have 110K 1/2 watts with me so couldn`t
> >> change them, before I could go out there today and replace them the
> > customer called and said the set has
> >> again failed with same problem, no video has sound, he shuts off set
for
> > 1/2 hour and set runs normally for 45 minutes
> >> then loses video again. This is the third time in 1 month that I have
had
> > similiar symptoms with the 1674/1690
> >> combination of boards, convergence goes out, replace the 1690, set runs
> >> 24
> > hours and convergence fails again,
> >> or no video/dead set, replace 1674 set runs for 1-2 days and repeats
the
> > failure, if I replace both boards at the
> >> same time I`m not getting the re-call, this is killing my bottom line
> >> with
> > all these freebie return calls, is anyone else
> >> running into this scenario?? Ed at Tri-State Module says Sears will now
> > only change them as a pair, too many
> >> recalls, any ideas? Sorry for the long post, I have 2 customers waiting
> >> on
> > me to "fix their set" Larry E
> >> Larry Eastman
> >> American TV & Electronics
> >> Crystal River, Fl. 34428
> >>
>
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