Lg plasma 50t1

[abdekader]

I have this TV

[IMG][/IMG]

No picture and No sound , after Relay on then Off

i unplug Ysus and Zsus after that VS =210

BUT after i plug the ysus and Zsus No vs but Ysus 15 it's Ok then Relay off
no all voltage

I checked the Ysus and Zsus no problem no Shorts

please i want your help

[abdekader]

Re: Lg plasma 50t1

no answer???

[Neelix]

Re: Lg plasma 50t1

If you unplug the Zsus board from the Ysus board and turn the TV on, what does VS measure then?

[selldoor]

Re: Lg plasma 50t1

I think there is too much of translation barrier.
Have you read the stickies and other threads. Your picture is very little help we ask for good clear pictures of the boards - both sides and close ups of connectors and labels showing VS VA voltage Pictures off site are not acceptable they need to be posted using manage attachments and should appear as thumbnails - see my signature message. If you are unable to read the board numbers on your pictures you need to tell us what they are.
There are many many requests for help - we tend to answer the ones that provide pictures and information first. I know very little about plasma tvs so I will not be much help. You need to check the power supply board is functioning first.

[Same]

Re: Lg plasma 50t1

See my post; LG 50pa5500-ua, sounds like the same problem sorry to say

[Neelix]

Re: Lg plasma 50t1

See my post; LG 50pa5500-ua, sounds like the same problem sorry to say

https://www.badcaps.net/forum/showthread.php?t=43576

[abdekader]

Re: Lg plasma 50t1

sound Ok working

i change Ysus TV is working the problem in Ysus

what's the Problem i don't know

if anybody know about this Ysus help me

[abdekader]

Re: Lg plasma 50t1

yes the same problem sound ok no pic

[sugar_ray]

Re: Lg plasma 50t1

I have a LG 50PJ550 which is an identical match to this set!! The symptoms I had, were the click click but tv wouldnt turn on. Suspected power supply the 2 power resistors on the PS board (R927, and R929) had ZERO resistance when measured. I ordered the kit off ebay for $15 for this set. after swapping the components out it was show time.

Before I plugged everything back in I had both upper and lower Y sus. buffers disconnected. Tv fired up (but with no pic because no buffers) Both lights on logic and main board were blinking. I "THOUGHT" I had it made as it finally showed signs of life without the repeated relay click!! so I powered down the tv, unplugged it and reattached the buffer boards. This time when I fired it up (buffers now attached) It took all of 3 seconds for it to shut itself right down relay started click click again and SNAP!! took out the Z-sustain surface mounted fuse with it!! Now the tv will only remained powered up if the Y-sustain board is unplugged. If i plug the Y-sus harness back in the tv just goes into shut down and replays click click

Lesson learned. what I THINK has happened, looking back on it. It had a bad buffer to begin with (obviously as set ran fine until i plugged in the buffers) The biggest problem with this model, in my opinion, is LG has set this thing up to fail!! Most boards in most sets will get their power exclusively from the power supply board. In this model......the Z sustain will get its power from the Y sustain board. Almost like a ripple effect. One thing in the chain shorts and you run the risk of all of them being effected (Y buffers, Y sust, Z sust)

I hunted down a replacement Y,buffers and Z. should arrive next week, see how this one plays out. But I gotta warn ya......the Y board (for some reason) is fetching more then the set is worth $$$$$ I got real lucky as tvpartsguy out of california had 1 left and got it for under $50. But ebay prices are just stupid for this board!! Buffers and Z sust are cheap

If you replaced your Y and still no picture?? chances are your old Y may have been ok??
I think the next logical place for you to look is buffers??

[abdekader]

Re: Lg plasma 50t1

thank you sugar_ray , i changed it the y-sus after that the tv working but this y-sus to anther tv ,so i want solution to this problem in y-sus

when i unplug ysus the vs ok after i plug it no vs

what's the problem in y-sus this important

[selldoor]

Re: Lg plasma 50t1

OK so you are now saying you know you have a faulty ysus and want to know what might be wrong so you can repair it? Right.
Other than checking fuses I dont think many people repair these. The ICs are quite expensive and I believe are difficult to remove. Most people just change the board.
Maybe worth checking the connectors the ribbons plug into.

[abdekader]

Re: Lg plasma 50t1

thank you selldoor i checked fuses and all ok

i will try to repair it , but i want help

i guess the problem in Ic's in the back of board

i want know what every IC does it , ic datasheet

[abdekader]

Re: Lg plasma 50t1

I repair it but i have another problem ın z-sus the panel ıs ok signal good but it's have yellow points in black the same negative

[abdekader]

Re: Lg plasma 50t1

Ok TV IS good now , it's working the Z-sus Problem i repair it thank you for all

[Recycleinformatique]

Re: Lg plasma 50t1

Can i have information on how you repair?

I have the same problem

[Recycleinformatique]

Re: Lg plasma 50t1

Ok TV IS good now , it's working the Z-sus Problem i repair it thank you for all

Do you remember how you repair Lg plasma 50t1.

I have same problem with ysus board. When I disconnect it the power board works good.

Thank you.