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Master thread for Panasonic plasma not turning on - Page 46

post #1351 of 1978
Quote:
Originally Posted by dtvjho View Post

I used a normal (thru hole) cap on my repair. With your pad gone, I'd solder directly to the leg of the IC that normally connects to that pad, will be either pin 11 or 13.

I used one of those as well, but I tried doing it with the board in the tv (incredibly hard and stupid of me). I took the board out and will attempt it again. I destroyed the bottom pad (one closest to center of board), so I think I should solder from the top to the second pin in from the edge, is that correct? I looked for a schematic but couldn't find one. Is this picture where I should connect the cap? It would be pad 1 to pin 2. Thanks!

post #1352 of 1978
Actually, it looks like if I solder it from pad 1 to the pad right to the right of pad 2 that it will work. After holding a light behind the board, it doesn't look like pad 2 goes to pin 2.
post #1353 of 1978
Just an update, I did end up soldering from pad 1 in the picture above to the pad right to the right of the missing pad (#2). I also replace the same cap on MC201 while I had the power board out and it was much easier. Plugged it in and it powered on! So hopefully that is fixed! Thanks for the great thread!
post #1354 of 1978
I have a Panny TH-46PZ85U, vintage 2008. It started getting the 10 blinks of death last week. I changed out the cap on the MC301 and MC201 boards - didn't fix. I then added the suggested 4.7Kohm resistor between IC pin 13 and the PCBA edge pin 12 on both boards - Success!!! Thanks to kdh05 and all the other folks on this thread!!!

Question: Is this a Panasonic marginal design issue? Did Panasonic put in any kind of long term fix for this? My P-Main board was revision L, ETX2MM704MGL. I noticed the recent replacement part number available is revision U, ETX2MM704MGU. Should I stop recommending Panasonic Plasmas to friends and relatives, especially for those who don't have soldering skills?

Thanks !!!
post #1355 of 1978
Quote:
Originally Posted by ExpensiveHobby View Post

I have a Panny TH-46PZ85U ... My P-Main board was revision L, ETX2MM704MGL. I noticed the recent replacement part number available is revision U, ETX2MM704MGU.

According to this Panasonic document, the ETX2MM704MGL is for your TH-46PZ85U, whereas the ETX2MM704MGU is for the later revision model TH-46PZ85UA. The boards might not be interchangeable.
post #1356 of 1978
Had the usual 10 blinks shortly after 2years (2010) got nowhere with Panny, bought a new power supply board after spending time reading here, very nice site.
The new supply lasted only 1 year, same problem, bought another supply for a spare when they came available, fortunately, a few months before it kacked again, popped the new one in and away it went, fortunately they were only about $150.

I have another new supply sitting on the shelf, but after spending another day going through this thread from about page 30 to the end, it looked like kdh05 had nailed the fix on the power supply board, incredible effort, thank you.

I did the repair on the original power supply board and will do it to the second supply that died tomorrow, I'll wait until the third board that is in the set dies before I check the repaired boards out, but am confident kdh05's fix will do it.

I removed the mc201 & mc301 modules from the power supply board to do the repairs, which is a lot of extra work, but it's easier to do a good job, I might try to do them in place on the next one. Do remember to place a dab of epoxy or other hardening adhesive from the new cap to the module edge.
I used a radial lead cap, trimmed the leads to connect the -lead to the pad the old cap came off of and the +lead I soldered to pin 13 of the IC, mostly for strength. Laying the cap lengthwise on the module top edge will keep it from being dislodged if bumped.

It would be nice to have a picture of a repaired module on this thread, I'll try to post one after the next repair to let be known what is being talked about here.

It would be nice to have the troubleshooting guide for this piece in case something else goes bad, it's not possible to download from the link Tomwil has posted in the past, but thanks for putting it out there, it's a great set and had the best picture I've seen to date, for $2300, it should, shame on Panny for their treatment of their customers.

Thanks to all who have contributed to this fix.
post #1357 of 1978
Try page 42 #1240 for a pic. And page 45 #1340 for a guide.
post #1358 of 1978
"It would be nice to have a picture of a REPAIRED module"
post #1359 of 1978
This is the repair I made.
LL
post #1360 of 1978
Quote:
Originally Posted by DavidOH View Post

This is the repair I made.

DavidOH's excellent repair on a CL TH-50PZ80U is found here.

post #1361 of 1978
I got the 11 red blinking light on a 50g10 any idea how much it would cost to repair this or can someone tell me which board needs changing?
post #1362 of 1978
not sure exactly 100%,but here are few clues

from some panasonic manual that is for 42 and 50"








maybe someone with little more experience to answer this,
but those should be the codes for the 11 blinking light.

goodluck
thanks
post #1363 of 1978
Awesome thread guys! First post here. I'm very slowing getting into repairing tv's but I've been repairing consoles and laptops for a couple years now..

Anyways, I have my buddies pc42x1(says c10 or something on the panel but same as picture in service manual of boards) panasonic. It turns on for about 1-2 minutes then goes to 10 blinks. I actually found the service manual and ran the test but it seems it would be inconclusive.

Of course there's 15v on pin 7, 8, 9 when it was on. Right when it clicked off I checked them and no 15v on any. Did I check them correctly? After reading through some of this thread I'm seeing that many of these 10 blinkers don't turn on at all.

I'm very hesitant to start just replacing boards and would be awesome if you guys with more experience could help me out.

Service manual says either a board or p board haha. After reading through this I see it could be more than that. Then it turns on for a few minutes which is weird. Elco caps on P board look fine.

I actually didn't look at the A board like a dummy. Any help would be greatly appreciated thanks!

EDIT:I wish this one was as easy that just soldering an smd cap. Those ones weren't turning on at all, right?
post #1364 of 1978
I just had the power supply replaced on my PZ46800u. Build date Nov 2008, purchased Jan 2009. The TV would blink 10 times trying to turn it on. I could unlpug, plug etc and it would eventually came back on. The board he replaced was in the center of the TV. He replaced the whole board. I had an extended warranty, but if I had to pay it would have been $300 CDN.
post #1365 of 1978
So, I went to drop off some e-waste for recycling at the dump today and just couldn't resist the 50" TC-p50s30 (manufactured in 10/11) plasma sitting there. I've had luck rescuing Sony HD CRTs in the past and replacing the IC chips so I figured I'd give this a shot. I've tried to do some research before I posted (problems with internet sourced anecdotal information aside), and this is what I've learned. The 7 blink is generally referring to a power board, but can be triggered by multiple things, and I've seen mention that the cracked screen itself could trigger the code. Is it possible to source a working screen for this thing or is that economically unfeasible? Everything I see says a plasma panel is as expensive as, or more than, the actual unit new. I like tinkering, but is this just not worth it? Any helps or points in the right direction will be appreciated.
Cheers,
Alex
post #1366 of 1978
That's the thing with this one.. It turns on every time and stays on for 1-2 minutes then turns off and blinks 10 times. I checked ebay and the whole power board for this model is under $80 shipped. Not bad. I'm going to check their return policy.

The service manual says either power board or "A" board for 10 blinks which would really be easy enough although, after reading on here I see 10 blinks can be more than that.
post #1367 of 1978
bosanci28, thanks for the troubleshooting flow chart. I swapped fans around and the it seems one of the fan circuitry is shot. The problem of a fan not running does not follow the fan swap.

50g10, I got 2 fans top middle rear of panel. Is there a 3rd fan? I just got off of Ebay a TNPH0793 2A board, hope this fixes the problem. I'm assuming it's this board since we have one fan circuit running and one dead. The same location. I would think if all fans were not working it could be the A board, but since a fan is working it should be that PB board. Any further clues as to the part# for the PB board?
post #1368 of 1978
I have searched this forum to try to assure I haven't missed a post about this set. My TH-C50HD18 has an A board TNPH0716ADS and a P board MPF7719. The symptom is 10 blinks when plugged in before trying to power up. When I probe the P board connectors P6, P7 and P25 I find only 2 voltages on P7, The STBY+5V and ECO_ON+3.27. The P board clicks when plugged in and also when the power button is depressed. The service manual I found has all the schematics except for the P board. Removing the connectors from the A board to the P board (A25 & A7 on the A) stops the relay clicking. Makes sense as the power switch from the front panel goes to the A board.
Unfortunately the P board doesn't have the little MCX01 board on it. All the electrolytic capacitors look good. From the block diagram of the P board it looks like if there's an error SOS happening the all voltages are shut down. So I don't know how verify that the P board is OK or that the A is OK.
The SS and SC boards LEDS do not light up either.
It may be mute as I have searched all day for a TNPH0716ADS and every one is "out of stock". And none on Ebay either.
I'm not sure what actually started this problem, but my 4 YO grandson was playing a Wee game, became frustrated and threw a toy at the screen. Since then the set has been not operating. There is no visible damage to the screen. Could something in the plasma screen itself be shorting?

Cheers,
Stan
post #1369 of 1978
Quote:
Originally Posted by Q-14 View Post

Had the usual 10 blinks shortly after 2years (2010) got nowhere with Panny, bought a new power supply board after spending time reading here, very nice site.
The new supply lasted only 1 year, same problem, bought another supply for a spare when they came available, fortunately, a few months before it kacked again, popped the new one in and away it went, fortunately they were only about $150.

I have another new supply sitting on the shelf, but after spending another day going through this thread from about page 30 to the end, it looked like kdh05 had nailed the fix on the power supply board, incredible effort, thank you.

I did the repair on the original power supply board and will do it to the second supply that died tomorrow, I'll wait until the third board that is in the set dies before I check the repaired boards out, but am confident kdh05's fix will do it.

I removed the mc201 & mc301 modules from the power supply board to do the repairs, which is a lot of extra work, but it's easier to do a good job, I might try to do them in place on the next one. Do remember to place a dab of epoxy or other hardening adhesive from the new cap to the module edge.
I used a radial lead cap, trimmed the leads to connect the -lead to the pad the old cap came off of and the +lead I soldered to pin 13 of the IC, mostly for strength. Laying the cap lengthwise on the module top edge will keep it from being dislodged if bumped.

It would be nice to have a picture of a repaired module on this thread, I'll try to post one after the next repair to let be known what is being talked about here.

It would be nice to have the troubleshooting guide for this piece in case something else goes bad, it's not possible to download from the link Tomwil has posted in the past, but thanks for putting it out there, it's a great set and had the best picture I've seen to date, for $2300, it should, shame on Panny for their treatment of their customers.

Thanks to all who have contributed to this fix.

Friend on my advice bought a 54 inch Panny plasma in May 2010. In September or October 2010 it quit and had the 10 blinking lights. Panny had no parts available and after endless phone calls they finally agreed to buy it back. He then bought a 58 inch in November 2010. He called me last night and said this one let out a loud POP with a flash of sparks out the back. Now it has the 10 flashes. This is pitiful. Any chance Panny will do the right thing and fix this for him at around 15 months old?
post #1370 of 1978
I have found the service manual for this plasma TV, but it skips the schematic for the power supply. It does have the schematic for all the other boards. I also have the 11th Generation training manual. Well I have the 8th though the 11th. The 11th more closely resembles the TH-C50HD18 with the exception of the P board. My P board has a different configuration most notably the connector locations. In any event there is a signal in the training guide called STB12V that exits the P board, goes to the SS board, passes through a jumper SS34 and returns to the P board. This then is supposed to generate STB5V.

STB5V goes to pin 5 of A7 on the A board. Eventually a command is returned that generates the F+15V.

On my TV the STB12V at the SS board connector SS34 it is +5V not +12. However the STB5V is +5V at P7 pin 5 and a short pulse is present at P7 pin 6, which is the command to turn on F+15.

The F+15 never happens and the 10 blinking lights occur. Does any one have suggestions? I would dearly love to get the P board schematic for MPF7719. It's rather interesting that the service manual omits it. I don't want to replace the board if it's a malfunction in the A board.



Regards,
Stan D.
post #1371 of 1978
I was going to post the source for the training manuals, but was banned until I have made at least 3 posts. This is my third. Sources will be next.
post #1372 of 1978
post #1373 of 1978
could you post a link for the 12th generation? pretty please
post #1374 of 1978
post #1375 of 1978
I got all excited I found the service manual for the TH-50PX80UA 720P. The board layout was similar to the C50HD18, but the P board had the connectors in different locations. Unfortunately I couldn't map it to my P board. There's a "PA501" in the Main_SW_1 that goes to the relays, but I can't locate it on my P board. Looks like a fuse.

So I dug around some more and found service manual for the TH-50PX80U and it has my P board!! Now I'm excited, but no joy. There's no schematic for the MPF7719 there either. They just skip the schematic and the views of the foil and components just like in my TH-C50HD18 SM.

Bummer, guess I'll have to shotgun it and fork out $100 for a P board and cross my fingers. Still can't find a TNPH0716ADS A board.

Cheers.
post #1376 of 1978
Quote:
Originally Posted by stanford.douglas View Post

12th generation here:
http://tsn.pstc.panasonic.com/PASS/o...ical_Guide.pdf

s.d,

THANKS! You made my day! and then some
post #1377 of 1978
The TV set is from August 2010. When plugging in the TV, I can hear a relay click once, then twice, and then the red light start blinking one time. The associated service manual reports "Unknown SOS/Panel Information SOS/PD4 Start SOS" but no check point mentioned.
Initially I could "easily" switch on the TV by unplugging/plugging the power cord but the trick does not seem to work anymore.
I tried to find additional technical guides (gpf13du chassis so I assume 13th generation?) but no luck so far.
Any help would be appreciated. Thanks.
post #1378 of 1978
Tomwil,
are you willing to part with it? My understanding is that the ADS suffix is for the 50" TV. In my case the TH-C50HD18.

Stan
post #1379 of 1978
It appears there is a seller on eBay who has taken kdh05's advice and started a repair service for $100. Not sure why the seller lists the TH-42PX80U, as that model does not have the MCx01 modules.

No affiliation, of course.
post #1380 of 1978
I thought I would do an update on the TH-C50HD18 I have been working on. It would seem that this is the same TV as the TH-50PX80U. Not the UA suffix. It is also the same as the TH-M50HD18. All of these and their smaller counter parts, the 42" versions have no schematics for the P-board listed as # MPF7719. Later versions do have data on the P-boards, but these are not the MPF7719. The TH-50PX80UA, for instance, has the LSEP1260MXHB listed and the service manual includes the schematic.
I have found that the MPF7719 power board was replaced with the part LSEP1260MXHB. This evidently is the current board for these sets and is what should be substituted when replacing the MFP7719.
The C50 was sold through Costco and the M50 through Walmart. The 50PX must have been for the regular retailers.
In any event the schematic for the MPF7719 is still avoiding my capture making it virtually impossible to trouble shoot the board at a component level.
All the above goes for the 42" versions of this set.

Working without a schematic I am able to determine that after intial plug in of the TV I get 12V applied to the SS board and returned to P-board via a jumper. There is 5V applied to the A-board and this results in a pulse (2 sec.) of 3.2V to the P-board. However there is no resulting 15V raised. This leaves 2 possibilities, 1. there is something wrong with the P-board 15V circuit or 2. there is a short somewhere in the 15V lines else where in some other board. I also have a line called ECO_ON that has +5V on it.

Regards,
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