Question about LG 42PC1DV 42 in. EDTV-Ready Plasma Television

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We have an LG 42PC1DV in. Were sent a Y SUS replacement board told it was compatible but then someone else said it's not...The original panel was 6871QYH948B the replacement is a 6871QYH053A Are we safe to fit the latter? Have spent all afternoon trawling the web for a definitive answer.Thanks in advance for any help you can give would be greatly appreciated. Pete

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Don't have the answer, but am also wondering about replacing my 6871qyho53b board with 6871qyh048b. There seems to be a lot of board numbers where the boards look the same?
Don

Posted on Mar 16, 2011

  • farley591 Mar 17, 2011

    A cynic might be of the opinion that the lack of reliable information and subsequent confusion are as much about preventing repairs in the hope that manufacturers sell more TV's. From what I read people seem so disappointed with how quickly the sets are scrapped that they vow never to buy the same make again. But the PCB suppliers don't care as they seem to sell to the other TV manufacturers too. But luckily we're not cynics...

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Hi There, I have acquired an LG RT42PX10 Plasma, nil picture, power led goes green. I have checked the power supply pcb, all main voltages Va, Vs within spec. Have audio. One big cap on the Y sus is...


Aaron,

If you have a bubbled on you r Y sus board you need to replace the cap if you can find it or you can
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The Z-SUS board... LG panel I assume? Not your most typical failure, but certainly not unheard of. You should remove the panel connections for the Z-SUS and inspect along the edge of the panel for burns or signs of smoke with a flash light. If you can not get a clear view, it may be necessary to unscrew the panel and carefully lift the edge a little. You want to inspect the point at which the ribbons enter the panel. If you do not see any black smoky marks, you may be safe with a Z-SUS replacement.

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Phone the number on this site:

http://www.partmaster.co.uk/cgi-bin/search.pl?query=LG%2042PC1DV%20&brand=LG&model=42PC1DV&model_pre=42PC1DV&path=109164&part=

copy and paste this into your search bar at the top of your browser. hope this helps.

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1 Answer

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Your Vs voltage is high, check if the heatsinks on the Z-sustain board are getting hot after a short time, if so replace the Z-sustain board. If not, dis-connect the Vs & Va plug connection to the Y-sustain & check if the voltages are normal (185V & 80V). If they are then your fault will be in the Y-sustain board. There is a possibility the control board (sits below the power supply) could also be a problem as it is not able to initiate the control to the sustain boards.

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1 Answer

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I would change the Y-drive boards (there is usually one for upper and one for lower and are connected to the y-sus and the panel). If there is a problem with the Y-sus that caused a capacitor to blow, it is likely that the Y-drives were also damaged. You can usually check the voltages on the board with a digital multimeter. There is usually a sticker on the Panel telling you what the voltages should be (Va, Vs, Vcc, etc...). I would also check the voltages on the Z-sus (sometimes called X-sus) but the Y-drives are definitely where to start.

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I think you probably mean the Y-Sustain board which does have fuse which can blow. This board is on the left hand side (as you look from the rear of the TV). Occassionally other factors can be responsible for this fuse to blow such as the buffer PCB which works in conjunction with the Sustain board. An established repair service centre or a supplier on-line will porvide a replacement for you.

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Hi Ryan, You are on the right track. It is the power supply board. Once you replace the power supply board, the unit will back back to brand new. Mike

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6 Answers

My LG Plasma TV RU42PX10C


Hi all..i had the same problem with my 42 inch LG
rz42px11. its a faulty zsus board(Z sustain part no 6871QZH033A) the pop
sound was the fuse on the board blowing.not that hard to replace but be careful with the connector ribbons! got my replacement from
https://www.chsinteractive.co.uk/ £150....expensive,but probably cheaper than
calling someone out to fix it.
P.S i tried just to replace the fuse on the board T2AH 250v but it blew,i think the fact the fuse blows means the board is faulty..but you could try.
hope this helps someone.
Good Luck

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