Plasma no power 50PFP5332D/37

[Mr Bill]

Re: Plasma no power 50PFP5332D/37

Checking pin connector Ij02 on SSB all pins read correctly except maybe pin 13 which is the lamp_on_out pin, it read .247 volts.l

I have this same tv on my bench at the moment and IJ02 pin 13 reads .226 volts in standby

[rmoody]

Re: Plasma no power 50PFP5332D/37

I have this same tv on my bench at the moment and IJ02 pin 13 reads .226 volts in standby

Thanks for the tip Mr. Bill

I've read so much in the SM my eyes started crossing and I had to give it a rest for a while. gonna start back in the AM i guess.

P.S. My bench is the kitchen counter and my wife doesn't like it.lol

[PlainBill]

Re: Plasma no power 50PFP5332D/37

Thanks for the tip Mr. Bill

I've read so much in the SM my eyes started crossing and I had to give it a rest for a while. gonna start back in the AM i guess.

P.S. My bench is the kitchen counter and my wife doesn't like it.lol

I understand. The dining room table was my workbench for my first monitor repair, and my first plasma TV repair. When the 42" plasma TV wound up in her office all complaints stopped. Shortly thereafter she cleaned out another area for me to work.

PlainBill

[rmoody]

Re: Plasma no power 50PFP5332D/37

I understand. The dining room table was my workbench for my first monitor repair, and my first plasma TV repair. When the 42" plasma TV wound up in her office all complaints stopped. Shortly thereafter she cleaned out another area for me to work.

PlainBill

Yeah, I upgrade our main tv every time i get a better one. I need a nice led but haven't came across any yet. Gonna build me a shop pretty soon, then she'll never see me again.

[rmoody]

Re: Plasma no power 50PFP5332D/37

Could a bad buffer or sus board be causing my problem PlainBill? Something such as a shorted buffer board causing the SSB to not power on the power supply? I'm pretty sure the power supply is good since I've already tried swapping a "guranteed" board and it didn't fix it. I'm gonna be shipping that one back tomorrow.

The components on the SSB are pretty small and i'm not likely gonna be able to repair it. An LDO regulator is about the smallest thing i'm confortable with soldering.

[PlainBill]

Re: Plasma no power 50PFP5332D/37

Could a bad buffer or sus board be causing my problem PlainBill? Something such as a shorted buffer board causing the SSB to not power on the power supply? I'm pretty sure the power supply is good since I've already tried swapping a "guranteed" board and it didn't fix it. I'm gonna be shipping that one back tomorrow.

The components on the SSB are pretty small and i'm not likely gonna be able to repair it. An LDO regulator is about the smallest thing i'm confortable with soldering.

I'm not sure. A quick test - if the main supply comes up with the power cables disconnected from the sustains, but does not if one or more sustains are hooked up, one (or more) sustains are the problem. If the standby supply is working, but the main supply is not turning on (when the sustains are disconnected from the power supply), there is a problem with either the small signal board or the power supply.

PlainBill

[rmoody]

Re: Plasma no power 50PFP5332D/37

I'm not sure. A quick test - if the main supply comes up with the power cables disconnected from the sustains, but does not if one or more sustains are hooked up, one (or more) sustains are the problem. If the standby supply is working, but the main supply is not turning on (when the sustains are disconnected from the power supply), there is a problem with either the small signal board or the power supply.

PlainBill

Good to know, I've tried unhooking the sustains multiple times but I didn't know if the SSB would turn on the main lines if the sustains were unplugged.

[PlainBill]

Re: Plasma no power 50PFP5332D/37

Good to know, I've tried unhooking the sustains multiple times but I didn't know if the SSB would turn on the main lines if the sustains were unplugged.

There are a couple of rudimentary tests that can be performed on the system when it becomes unclear why the power supply isn't turning on. One of the simplest is to remove all loads and apply AC power. The standby supply should be working (a little over 5 volts in most cases.) Next, check the main outputs and the PS_ON input. Some power supplies have a resistor that pulls the PS_ON input high and turns the main supply on. On others is must be pulled high (a 2K resistor to 5VSB will do it). Some supplies are designed so PS_ON must be pulled low.

PlainBill

[Mr Bill]

Re: Plasma no power 50PFP5332D/37

If your still trying to get your plasma to power on take a look at the training manual from scribd

http://www.scribd.com/doc/48913339/E...nical-training

It lists alot of things to try if the tv won't power on.

[rmoody]

Re: Plasma no power 50PFP5332D/37

This is good Mr. Bill. It's kind of like a tv repair for dummy's guide. lol very explanatory.

[rmoody]

Re: Plasma no power 50PFP5332D/37

Pulled from manual:
"On the plasma panel, the VG voltage (15.5 volts), D5V and 3V3 voltages switch On. The Relay On voltage switches the Logic Board On. When the Logic board turns On, the board then switches the VS-ON voltage High (3.2V). This switches the VS voltages on the Power Supply. The VS voltage supplies power to the X and Y driver boards.
page 12"

OK, here i have the VG voltage of 15.5 and the D5V. can't find the 3V3 anywhere though.??? The Relay signal has 2.84v while tv is in standby but drops out when power button is pushed (This seems bass ackwards to me). And of course as always, My vs_on is not switching on.

PlainBill, do you still think this is in the SSB? Seems to me like the logic board is the problem by not turning on the vs_on. But, your the expert and i want your advice.

[Mr Bill]

Re: Plasma no power 50PFP5332D/37

http://www.scribd.com/mesteroiub/d/6...-PDP-2K7-16872

Scroll down to 5.2.2 (page 22). It gives a power supply checklist. I have the pdf on my computer but it won't let me upload it (token missing). I can email it if you want then you'll be able to atleast zoom in some things within the document.

[rmoody]

Re: Plasma no power 50PFP5332D/37

http://www.scribd.com/mesteroiub/d/6...-PDP-2K7-16872

Scroll down to 5.2.2 (page 22). It gives a power supply checklist. I have the pdf on my computer but it won't let me upload it (token missing). I can email it if you want then you'll be able to atleast zoom in some things within the document.

I've been over the PS pretty good and I have that spare also so I'm pretty sure both aren't bad. My Main Logic only has 2 led's where that last PDF you pointed me towards said I should have 4. I'm pretty sure it's down to the Logic or SSB at this point. Hopefully it's the logic (cheaper)

[Mr Bill]

Re: Plasma no power 50PFP5332D/37

My Main Logic only has 2 led's where that last PDF you pointed me towards said I should have 4. I'm pretty sure it's down to the Logic or SSB at this point. Hopefully it's the logic (cheaper)

Did you check out the pdf i posted on my thread? This 4 page pdf explains putting the tv in stand alone mode. That should be able to rule out the ssb or main logic. I haven't tried on my set yet for giggles, but the scribd link i gave a few days ago isn't correct for our set (even though our model is listed).

This pdf seems more accurate (jumper pin cn2007)

[rmoody]

Re: Plasma no power 50PFP5332D/37

Did you check out the pdf i posted on my thread? This 4 page pdf explains putting the tv in stand alone mode. That should be able to rule out the ssb or main logic. I haven't tried on my set yet for giggles, but the scribd link i gave a few days ago isn't correct for our set (even though our model is listed).

This pdf seems more accurate (jumper pin cn2007)

Yes I did, I tried Jumping both 2 and 3 pins and 3 and 4 pins and never could get a response from the screen. For future references a jumper out of an old hard drive or cd-rom drive works great for this. Does your logic board have 4 led's?

[Mr Bill]

Re: Plasma no power 50PFP5332D/37

my main logic has 4 leds. (2000, 2003, 2002, 2001) my main logic PCB # is LJ41-05400A (samsung). LED 2000 & 2003 stay lit when the tv is on. 2001 lights up for about 5-10 seconds then turns off and 2002 blinks.

I unplugged 1M46, 1M03, and 1M02 from the power supply to the ssb. I disconnected the lvds cable from the main logic to the ssb. (it has 16ish multicolored wires) Jump pins 3 &4 on CN2007 on main logic.

Plug is in wall and a/c bung on back of tv but the 2 prong connector (CN8001) disconnected. As soon as i plug the 2 prong connector in the power supply i get 2 clicks and the tv starts up in stand alone mode.

I even went as far as diconnecting the main logic power wire from the power supply and i still get 2 clicks from the relays (albeit no picture)

You've been saying your not getting any clicks at all right?

[rmoody]

Re: Plasma no power 50PFP5332D/37

Yeah my 2000 and 2003 stay lit but the 201 and 2002 never light. I'll try the screen pattern test again and see if I can get anything. Yes, my relay is clicking.

[Mr Bill]

Re: Plasma no power 50PFP5332D/37

Yeah my 2000 and 2003 stay lit but the 201 and 2002 never light. I'll try the screen pattern test again and see if I can get anything. Yes, my relay is clicking.

Do all the led light up when you first plug in the power supply? When i plug in mine all 4 light up for about 10 seconds, then they all shut off until i hit the power button on the remote or on the tv itself. When i disconnected the power wire from the main logic the tv never turned on. The one training manual says to ground pin 4 on CN8015 (which i don't have on my power board), with that said it might be the main logic.

That last pdf i posted says LED 2000 & 2003 stays on with a solid led. LED2002 turns of when LED 2001 starts flashing. Its goes on to say "Note A" If LED 2001 is not flashing then no data is flowing to the main logic and it maybe deffective.

One last thing, Its says to check CN8002 on the power board (wire going from the power supply to the main logic) Check 2nd pin from the left (VS_ON). If 0 volts is present then the problem is with the logic or ssb.

[rmoody]

Re: Plasma no power 50PFP5332D/37

Well, I'm LUCKY, Found a main logic on fleabay for 25 bucks shipped, popped it in and the tv fired right up. Glad to get this big hunker out of the way. Not sure what went wrong on the other logic but anyways, I'm glad it worked. Thanks to everyone for the help. Mr. Bill, your diagrams on the main logic LED's really helped.

[bphan6]

Re: Plasma no power 50PFP5332D/37

Hello All,
I have the same TV and have slightly different symptom...
Upon power up, I can hear relay click on and then within couples second, it click off. The one LED on the Power supply board flashing 7 times then off for couples of second then flashing 7 times again. I look at the logic board, and never see any LED turn on... I thought that was my problem... so I bought one logic board on ebay... installed it and I got video... everything seems to work but the next day, I turned it on and everything dead again... Open the case and found that I am back to original problem, the relay click on then off, LED flashing on PS board 7 times and no LED on the logic board... Can some one give me some hint how to fix this TV.... 50PFP5332D/37
Thank you so much