Question about Zenith P42W46X 42 in. Plasma EDTV

6 Answers

I have a zenith 42'' p42w46x picture problem

I have look for any obvious bad caps, found none! I have removed all boards and checked for cold solder joints. also clean dust off all ribbon connection, and reseated them. Sound is working fine!

Picture symptoms:

1) I have tried multiple inputs (vga, a/v, coaxial, s-video), with no change to picture. to me this rules out signal boards, as both failing would be odd?

2) if a source is plug in, the screen symptoms are different then when no source is plugged in. When source is plugged into screen, it is full screen and static with odd color patterns. when source ia unplugged screen changes to a black screen, excepted for a 7'' wide colored vertical bar (with some flickering) that randomly jumps around the screen.

3) My thought would be the main unit board (my experience is with lcd), but have read a lot that the y-sus and z-sus seem to fail???

Thanks for helping, in advance!!!!

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  • 5 more comments 
  • javswr
    javswr Feb 28, 2009

    Tv has been reset many times!!

  • javswr
    javswr Feb 28, 2009

    Thanks, I am looking for more then a might be. Regarding the z-sus and y-sus boards.

  • javswr
    javswr Feb 28, 2009

    IC stand for what?

  • javswr
    javswr Feb 28, 2009

    I do not have any schematics, for board trouble shooting.

  • javswr
    javswr Feb 28, 2009

    shopjimmy I have used as well as having manual zone bookmarked.

    Any idea's on which board I should focus on?

  • javswr
    javswr Feb 28, 2009

    what does y-sus board do and what does z-sus board do?

  • javswr
    javswr Feb 28, 2009

    Thanks for the input, this gives me a direction!

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6 Answers

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The 'panel' is what you look at or from the back the 'big' silver thing all the boards are mounted on. There should be a white sticker with the VS/VA voltage. In your case it would be the YDRVTP, YSUS, ZSUS, or the Y drive board which may or may not come on the Y sustain, Y sustain and Z sustain. But going back to the fact the Z sustain is bigger than the Y sustain which means the Z sustain does the majority of the processing, and the fuse is popped on the Y sustain, you need the Y sustain, Y driver, and Z sustain. Look at the plugs and check your VS/VA. You can also disconnect the sustain boards and read the voltages.

Posted on Feb 28, 2009

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  • 85 Answers

On y sus board.you focus on.
if its the case of picture problem then only.

Posted on Feb 28, 2009

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Do you have related service manual to test boards input / output voltage and signal?
I would recommend to test suspected boards in working same model TV to narrow down problem area. After confirmation of defective board, you can go ahead for component level repair or replace complete board.

Posted on Feb 28, 2009

  • 2 more comments 
  • Shahid Electronics
    Shahid Electronics Feb 28, 2009

    Manual Zone for service manual and Shop Jimmy for board purchase.

  • Shahid Electronics
    Shahid Electronics Feb 28, 2009

    You should have schematics for trouble shooting because you are dealing with high tech TV.
    Service manual would help you to rectify problem area.

  • Shahid Electronics
    Shahid Electronics Feb 28, 2009

    y-sus and then z-sus to test.

  • Shahid Electronics
    Shahid Electronics Feb 28, 2009

    z-sus / y-sus receive the signals from DIF (Digital InterFace) and high voltage supply and output scanning waveform for Module.

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  • 326 Answers

Its rare but in your case the board is faulty thats not possible.its just the ic on the main board supporting got faulty.get it checked at local repair center.its definately ic fault its gone weak or completely faulty.

Posted on Feb 28, 2009

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  • 479 Answers

Hi,
In case of CRT tvs and monitors definitely y sus and zseems are having the important role but dependenty if u are geetin no picture at all then this the boards issue and if picture is distorted one sided or shaking in one side then this might be issue with the Y-SUS and Z-SUS as well.

Posted on Feb 28, 2009

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  • 113 Answers

Hi there,
try to reset your TV.
unplug the TV for 30 minuts and check again.
Good Luck!!!

neo

Posted on Feb 28, 2009

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