[TechAssist] Re: Zenith Z52Z95D 9-1674 no video, red crt blurry/smeared convergence issues; 1/2 fixed
- From: "al m" <ampm@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 24 Jun 2005 21:37:12 -0400
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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