LG Plasma 50PC1DR- Y-SUS Issues

[cheebster]

Re: LG Plasma 50PC1DR- Y-SUS Issues

Hi tw2005, where do you see that? In the pdf, i see 4a for any voltage rating
I might be looking st the wrong place

[tw2005]

Re: LG Plasma 50PC1DR- Y-SUS Issues

Hope your having more luck than me. I got my brand new J015B today, looked good too and different to my blown 15B.

BANG!! dead. I could'nt find anything obvious with the existing 16B and did not replace.

I can only assume it killed the new module.

So i ripped the modules out of the Zsus i got going and now the ysus fired up.

Looks like 2 more modules $$.

Picture1 is new, 2 is the old dead one, 3 is now new dead one.

One thing I notice with the bad J016 is the first GND is open, you guys have any idea how this affects the module. I think it is this that is the problem. I've had 2 now that were bad like this.

[tw2005]

Re: LG Plasma 50PC1DR- Y-SUS Issues

Hi tw2005, where do you see that? In the pdf, i see 4a for any voltage rating
I might be looking st the wrong place

Just follow straight under S4A for the specs.

Type Number Symbol S4A
Maximum Recurrent Peak Reverse Voltage VRRM 50
Maximum RMS Voltage VRMS 35
Maximum DC Blocking Voltage VDC 50

[tw2005]

Re: LG Plasma 50PC1DR- Y-SUS Issues

Can you tell me where you got the bad modules from? I got mine from Hong Kong on Ebay but the seller only has refurbished J016B, no new. The J015B was new.

[cheebster]

Re: LG Plasma 50PC1DR- Y-SUS Issues

i got them from utsource.net, they are sanyo's SPI-50X3E120 not lg's yppd's.
bought from aliexpress, they also sell on ebay as utsource
they were very used to start with, but hell i got 2 working now.
next time im buying some new sanyo's not used.
did you check a lotta things before you installed the j016's ? like make sure buffers were not shorted, that everything was clean on the ysus zsus ?

im surprised it killed the j016 that bad, we can see the burns clearly, there must be some shorts elsewhere

// edit.. what do you mean the first gnd is open ?

[cheebster]

Re: LG Plasma 50PC1DR- Y-SUS Issues

so this

http://www.digikey.ca/scripts/DKSear...37318049910314

would be fine ? its rated 5a, but otherwise seems ok

Just follow straight under S4A for the specs.

Type Number Symbol S4A
Maximum Recurrent Peak Reverse Voltage VRRM 50
Maximum RMS Voltage VRMS 35
Maximum DC Blocking Voltage VDC 50

[tw2005]

Re: LG Plasma 50PC1DR- Y-SUS Issues

i got them from utsource.net, they are sanyo's SPI-50X3E120 not lg's yppd's.
bought from aliexpress, they also sell on ebay as utsource
they were very used to start with, but hell i got 2 working now.
next time im buying some new sanyo's not used.
did you check a lotta things before you installed the j016's ? like make sure buffers were not shorted, that everything was clean on the ysus zsus ?

im surprised it killed the j016 that bad, we can see the burns clearly, there must be some shorts elsewhere

// edit.. what do you mean the first gnd is open ?

It was the J015(new) that went bang. Double and triple checked, no shorts(unless I bridged something on install?). The set was working, swapped this board in for testing. Ran the ysus up with no IPMs and checked the voltages, all seemed ok and no smoke. Took a brave pill and removed the IPMs from the ZSUS I got working and this ysus board is now functional.
Can only assume my error or dud IPMs.

Have purchased other semiconductors from UTSOURCE, no probs but I don't like the idea of used or refurbished modules.

Got the J015 from UTBARN but I think I'll try again with 2 new modules from a guy in Malaysia. A little bit dearer but advertised as new.

If they go bang then I'll know it was bad parts as the ZSUS was in use until I took the IPMs out of it. I'll call it quits if they do fail, just burning $$$.

Very few of these for sale here now broken. I think most have expired and been dumped by most due to the expense of repair given what you can get new fairly cheap now.

Not the best picture on these LGs but the sound on this is awesome.

[tw2005]

Re: LG Plasma 50PC1DR- Y-SUS Issues

so this

http://www.digikey.ca/scripts/DKSear...37318049910314

would be fine ? its rated 5a, but otherwise seems ok

Link did not work, That PDF was my best guess but they look like normal diodes. Like TOM said won't hurt to go higher in voltage as long as the current is correct.

[cheebster]

Re: LG Plasma 50PC1DR- Y-SUS Issues

Oh, sorry. Okay..

http://www.digikey.ca/product-detail...DICT-ND/770117

here it is anyway I got some buffer chips coming from either usa or china (if that american guy answers i'd be glad to buy from US.. argh)

thanks tom66, maybe i'm saving that buffer at last. hell, i'll have 3 working tv's by today when digikey comes deliver those caps and such.

just need a buffer chip, but i'll see if everything works by having half of the tv on.

Link did not work, That PDF was my best guess but they look like normal diodes. Like TOM said won't hurt to go higher in voltage as long as the current is correct.

[tom66]

Re: LG Plasma 50PC1DR- Y-SUS Issues

Well, two TVs would be great I'm sure, a third could only be a bonus. How much did you pay for them. I need money as a student!

[cheebster]

Re: LG Plasma 50PC1DR- Y-SUS Issues

tom66, i paid 20$ each at a local recycler !!! i bought 5 total for 100$.
one had a broken screen, i salvaged the boards. 2 are fixed, one is work in progress, and the 4th one is waiting for the STK from china (42incher).

I had fun with these, took time but it'll get easier when i buy a few more. thanks for the help tom66. im not a tv tech at all, but an IT guy doing tech support/install and networking.

[tom66]

Re: LG Plasma 50PC1DR- Y-SUS Issues

I want to have a recycler who will sell those kinds of things.

Here it's £25 for a 32", and one every 3 months maximum.

[cheebster]

Re: LG Plasma 50PC1DR- Y-SUS Issues

LOL !! I 'tried' to fix the 3rd one with those parts from digikey. It bang'ed so hard my ear still hurts.. from the ysus board. But there was a picture !! lol. some stuff looks burned, gonna look it up.. but picture was working. hehe

[cheebster]

Re: LG Plasma 50PC1DR- Y-SUS Issues

oh well. got this one working as well.. replaced same parts again, dont know what happened, but im having another issue.

what can give this kind of pinkish image ? if i push -yv to -228v or so, i get something better.. but its not in the panel's specs at all

could it be a zsus issue or one of the ipms?

[tom66]

Re: LG Plasma 50PC1DR- Y-SUS Issues

Looks a lot like Zsus. Check Vzbias, should be around 90V.

[cheebster]

Re: LG Plasma 50PC1DR- Y-SUS Issues

vzbias ? how do i check this one ?

[tom66]

Re: LG Plasma 50PC1DR- Y-SUS Issues

Can you post a pic of your Z-sustain?

[cheebster]

Re: LG Plasma 50PC1DR- Y-SUS Issues

oh, got it. i swapped a board from a perfect set (zsus) and issue is still there. i noticed the ramp_up can not be adjusted on my ysus, not normal. gonna have to dig more..

checking and again the ramp_up big transistor on right black heatsink is shorted, the 2 10ohms big resistors burned, r66 burned, d28 shorted.

i really dont understand what's burning these things again and again :/

[cheebster]

Re: LG Plasma 50PC1DR- Y-SUS Issues

here's a pic of the z-sus // edit : i see the testpoints didnt search much.. but its still my ysus at fault. i need to understand why it burns again in that section.. the buffer ?

or something else on the board ive missed

[tom66]

Re: LG Plasma 50PC1DR- Y-SUS Issues

Poor design, you swapped IPM on that one? IPM must kill them every time.