Question about LG MZ-42PZ14 42 in. Plasma Television

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LG MZ-42PZ14 service manual

Hi, Has anyone got the service manual to this plasma tv?? If not does anyone know the spec of FL3 on the YSUS board Thanks in advance

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  • Ron Harris Dec 06, 2008

    hi

    i have a lg 42pz15 and ysus has gone the main problem been one of the big ic s had shorted i have replaced it with a 2nd hand one which dose not show a short and replaced some of the caps but the unit still turns off after the leds light up for a few seconds so i still got short some where do you have a curcuit for this unit?

    ps i have also got a 42pz14 which is the same inside all but the video card

    regarde ron

    paddingtontv@yahoo.com.au

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Had another plasma the same in for repair so managed to see value on other board!
Managed to find the service manual in workshop but no schem of y susatan.
TV now fixed

Posted on Sep 08, 2008

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Posted on Jan 02, 2017

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I had this exact problem on my TV, everything said it was the power board. It wasnt, luckily i was able to return that board. It was the YSUS board.

I should have done this this first but this is how i verified the old power board was good. Unplug TV, take the cover off and disconnect the wire harness going to the YSUS, plug TV in and turn on. If led stay blue its the YSUS.

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free+p+p

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The part that caused the fuse to blow is the hybrid that is mounted underneath the heatsink on the YSUS and ZSUS boards. The part used on these boards might be YPPD-J017C or YPPD-J018C, in about 90% of the time, replacing these hybrids fixes the plasmas with no video but good audio. Since VS and GND is shorted, that means that the hybrid has shorted internally. Most service techs would rather replace the entire YSUS or ZSUS boards since the hybrids are very difficult to remove.
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