Author Topic: LG 50PG3000 sound ok but no picture (Read 11702 times)

Vlad · « **on:** July 29, 2011,15:30:51 »

I check all fuses and capacitors all are OK
Light on control board lights on.
Any idea?
Thanks

Mulja tv repair portal · « **on:** July 29, 2011,15:30:51 »

Vlad · « **Reply #1 on:** July 29, 2011,16:37:40 »

I did some tests
VS - 438V
VA - 60V
M5V - 5V

To YSUS and XSUS is going the some voltage.
I have the TV switch on for last 30 min. The heat sinks on xsus starting to get a low heat but the ysus is still cold.

Vlad · « **Reply #2 on:** July 29, 2011,17:46:10 »

Ysus is still cold. All other boards are heating up.
Somebody has e service manual for it?
Ysus part number: EBR50038901

Mulja tv repair portal · « **Reply #2 on:** July 29, 2011,17:46:10 »

tv tony · « **Reply #3 on:** July 30, 2011,07:45:58 »

your vs cannot possibly be that high, recheck please

Vlad · « **Reply #4 on:** July 30, 2011,08:10:40 »

No it is showing me 438V
Maybe my meter is faulty. Will go today get a new one. I still need a spear.

Vlad · « **Reply #5 on:** July 30, 2011,15:22:42 »

I check it again with new meter and VS is 197V on both boards

Mulja tv repair portal · « **Reply #5 on:** July 30, 2011,15:22:42 »

tv tony · « **Reply #6 on:** August 02, 2011,02:04:33 »

excellent vlad, you had me worried then, i tried posting manual and compressed it still exceeds the limit, in any event it doesnt cover the sections you are likely to require. but when i get to work i will put one on the bench, one of our faulty stock and get the scope on it and report back
take care
tony walker

Vlad · « **Reply #7 on:** August 02, 2011,03:33:00 »

Thanks

CarolSwayze3 · « **Reply #8 on:** August 03, 2011,01:49:06 »

Oh that's very good, well as per my knowledge LG TV is always having picture problem.

Vlad · « **Reply #9 on:** August 03, 2011,06:56:24 »

Ysus is not the fault.
Control board is not the fault.
All buffers are ok.
There is only one more think AV board or the firmware.
If somebody has a firmware for this TV let me know.

tv tony · « **Reply #10 on:** August 03, 2011,07:02:17 »

what are the letters after model number
tony

Vlad · « **Reply #11 on:** August 03, 2011,07:16:17 »

50PG3000-ZA.ARUYLH
Thanks

Vlad · « **Reply #12 on:** August 05, 2011,18:17:37 »

If somebody has this board for sale let me know please

Vlad · « **Reply #13 on:** August 07, 2011,09:17:35 »

There is really nobody who has this board or firmware for this TV?
Please help

Mulja tv repair portal · « **Reply #13 on:** August 07, 2011,09:17:35 »

Mulja tv repair portal

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