Re: Lg 60pz570 No picture, No sound, No Z-Y voltages

Well I measured the 18v control signal on the ZSUS board, measurus 4.5v.
The 15v outgoing rails from the YSUS (guess this is boosted to 18v normally?) is dead, same 4,5v.

Now I don't know when these voltages should be there, if they should be there during startup or if they are controlled by the logic board.

From reading other threads regarding the missing 18v, i've seen people talk about the voltage regulator, sadly this is on the back of the board for me, so I can't measure it while on....

Re: Lg 60pz570 No picture, No sound, No Z-Y voltages

Well it wasnt the logic board, replaced that. Same issue, same blinks.
Disconnecting 1 or the other buffer board didn't make any difference.

Re: Lg 60pz570 No picture, No sound, No Z-Y voltages



Small update, I mucked around with my hairdryer. Warmed up the ZSUS and Control board. Behavior changes a bit, relais in SMPS got a bit spastic and i got 55V on the ZSUS board for a brief moment.

18v control is present on YSUS board 1-2 seconds after startup. Then its gone again (so is the static noise/coil whine)....

Re: Lg 60pz570 No picture, No sound, No Z-Y voltages

Hi, I've rechecked everything and i am 100% certain all is good. No solder blobs, in EXT-AUTO_GEN mode it sounds like the ZSUS board wants to start (9V coming out) or something but the YSUS board seems completely dead (2V coming out).

All of the SMPS voltages are bang on (except the 5v (5.16v)) with the label on the back.
Reseated connects, and measured buffer boards. Found no direct shorts to ground.

Pictures attached....

Hi people,

Got my hands on a sweet 60 inch plasma. Guy i bought it from showed me live at his house: Turn on, relay clicks, faint glow until you turn it off.

So I went online, searched and found around the same model and people saying cracked solder etc, fused. So I wasn't smart and just took the boards apart as im a "electronics hobbyist". Indeed 1 or 2 cracked solder points. Fets measured OK from a quick check on my end, so did the fuses.

Resoldered the points, replaced one "starting to bulge" capacitor, and put the things back in. But...

Re: New Members - please post your introductions here

Hi, Merlin here from the Netherlands, hobbyist in repairing electronics .