Re: LG 60PB6650 - Bad ZSUS (3.8v to YSUS instead of 16v)?
One more bump.
One more bump.
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Re: LG 60PB6650 - Bad ZSUS (3.8v to YSUS instead of 16v)?
If you checked the voltages on the regulator ic's on the control board, and they are what they should be, you need a scope to check if anything else is operating, without that you would need to replace the control board.Comment
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Re: LG 60PB6650 - Bad ZSUS (3.8v to YSUS instead of 16v)?
Thanks, RJ. I'm going to look into replacing the control board before I send the YSUS out for inspection.Comment
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Re: LG 60PB6650 - Bad ZSUS (3.8v to YSUS instead of 16v)?
UPDATE: Sent the Y-Sus, Y upper, and Y lower out to a somebody on ebay (https://www.ebay.com/usr/asa.vd.pc) and they said the boards are fine. Onto the next board, probably main logic.Comment
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Re: LG 60PB6650 - Bad ZSUS (3.8v to YSUS instead of 16v)?
Did you ever figure out what was wrong with your TV? I have the same TV and it has just gone bad. I turn on the TV, red stand by light goes off but there is no sound or picture. I don't get a blinking light on the logic board either.Comment
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Re: LG 60PB6650 - Bad ZSUS (3.8v to YSUS instead of 16v)?
Hi everyone?
I have L.G. 60PB6900 but is with the same issue...
I changed Y-Sus and Z-sus, but still 18v. are not present...
The green light doesn’t come on...
Did you find a solution for that issue....Comment
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Hi all,
I am trying to fix my plasma TV which is not powering on due to damaged IGBTs. I have changed two igbts and 2 IC drivers on the zsus and also two igbts on the ysus.
Now everytime I plugged the ZSUS and the YSUS boards to the power board, the two 30f124 IGBT on the ZSUS are damaged and the TV stays in standby mode. When I plug the ZSUS board alone the TV turns ON but I do not see pictures. When I plug the ZSUS board without the two 30f124 IGBTs and the YSUS board, the TV powers on with a picture.
I am lost, should I change the YSUS board? Is the YSUS board damaging... -
LG42PC3D -UD originally with green lamp but no display or audio.
Owner says was working, then went 'pop'.
All 5V caps bulging. replaced.
All PSU output voltages within spec but -Vy is low on YSUS.
One of three parallel fets between SUS_OUT and SUS_DN is zenering,
eventually shorts DG. Replaced all 3 - -Vy now OK.
Y scan buffer test point does not follow YSUS output below -50V
Note: This unit seems to expect YSUS output to park at -Vy in between
drive signal pattern periods. A replacement drive signal board confirms this....11-18-2021, 11:49 AM -
Greetings all!
Originally this set had the usual messed up video symptoms such as: horizontal lines, weak, grainy video, bottom and top of picture differ in intensity of problem. It also seemed to slow to turn on or show the messed up picture.
Seemed like must be YScan/buffer board failure. Ordered buffer boards from my distributor which were supposed to be original/new and also from another distributor, I ordered the YSUS because I wanted to replace it for preventative maintenance. (also, the YSUS had a bulged cap, so there was even more reason to suspect it could... -
Sorry if this is too repetitive, or in the wrong place.
I'm new, and having much the same problem. My LG50PA5500 TV has been working flawlessly since new. The other day, while in the midst of watching a broadcast DTV channel, the entire screen suddenly and silently went dark (no snaps, crackles or pops); sound, channel selection and inputs all work OK.
I have checked connections and voltages from: stdby, pwr supply board fuses, psb output voltages to Zsus board and its fuse, output voltages from Zsus to Ysus and its fuse. All precisely normal!! I've also checked voltages to the...06-19-2021, 06:36 PM -
Hi
Had shorted YSUS
Q24 RPJ63F3
C726 cap
Q11 K3667
R528 & R529 2.2 ohm
replaced all of these but still trips psu VS & VA are a bit low when ysus disconnected. IC301 does look a bit burnt however
ZSUS is also good as far as I can tell
Anyone could help me out on this one
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