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Question Panasonic TH 42PA20 shut down issue ( AVS Forum Plasma Flat Panel Displays )
Updated: 2008-05-24 05:10:06 (1544)
Panasonic TH 42PA20 shut down issue

While watching my Panny today, I heard a nasty whinning sound for about 5 seconds and then the Display powered off . It was a very high pitched sound followed by the power cutting off. I was unable to turn the power back on until I unplugged the display and waited a few minutes to power it back on. Since this occured this afternoon, it has happened three times since. ANy ideas what may be going on? Thank you.

Answers: Panasonic TH 42PA20 shut down issue ( AVS Forum Plasma Flat Panel Displays )
Panasonic TH 42PA20 shut down issue

Well, after many moons of crossing my fingers and hoping for the best, I've now been bit as well by this bug. I received my display in August, and probably have 1500-2000 hours or so on it (haven't actually verified via service menu, though). First shutdown was about 2 weeks ago, then 1 week ago, and now twice over the past weekend. Needless to say, I'm in the process of trying to arrange service.

Dimitry's post encouraged me to share something I thought was interesting... so far the shutdown has occurred at exactly the moment a command was issued to my SA8000 cable box via remote... this could be either changing channels, or using the transport controls for the DVR functionality. At this point I'm trying to convince my wife to just pick a channel, any channel, and stay with it... The time bomb of eventual total failure has begun ticking...

So far while calling local servicers I've run into the problem that everyone wants to pull the plasma into their shop for the repair. While I've had offers to wait to pull it until the part comes in, I can't get anyone to commit to a one-day turnaround, and I've been told that there are several Panasonic service bulletins mentioning different parts for replacement associated with blinking power lights, so I might even have trouble just getting them to order a part and swap it when it comes in. In my case, I'm actually seeing 6 blinking lights separated by a solid light - not sure if this amounts to the 7 blinking lights that most are reporting.

It's frustrating to me since this should be a no-brainer... Panasonic knows that this issue is occurring, and the service bulletin specifies that the IC be replaced rather than the entire module, so the servicers want to do the soldering work in the shop rather than replace the entire module, which would be the right thing to do from a customer service standpoint. I'm not really blaming the servicers, since they don't want to jeopardize their "authorized" status, but at this point I think Panasonic needs to fix their customers as well as the display.

Can anyone offer any advice as to the best approach towards convincing a servicer to replace the module in-home, rather than the IC in-shop? Apart from everything else, I really don't want to add any more risk to the situation by moving the display from my home...

Thanks for all the details provided by everyone so far, it definitely feels better when one is not alone in one's frustration...

Descolada

Descolada

Panasonic TH 42PA20 shut down issue

Has anyone in Mpls dealt with Tech Center in Bloomington on this shutdown issue? I am interested to find out how your experience was with them.

Thanks,

Gary

gtjia

Panasonic TH 42PA20 shut down issue

Descolada - Sorry to hear about your plasma. I ran into the same problem with my 42PA20 and the local service center. I had to commit to in-shop service before they even agreed to order the part. Luckly it ended up being the same day service, once they got the part. Still, I was very skeptical of having them transport my plasma, but they seemed very knowledgeable.

My plasma has been working great since they replaced the IC. In counting blinking LED you need to count "OFF" pulses. If you have any problem with the service center please PM me and I will give you the part number of the IC that is needing replacement for a 5 or 7 blinking power LED shut-down issue.

If you read your consumer unit in-home warranty card you will notice that the use of "in-home" repairs/diagnostics contains wording that pretty much leaves it open to the service center to decide if they are willing to fix it in your home or at their shop. While some don't mind soldering in your home, most will probably want to do this in their shop. What you may be able to do is convince your servicer to remove and take only the power supply board. It would make more sense for them to do this then to remove entire plasma from your home.

Please keep us posted...Hope you get your plasma repaired soon.

stef1

Panasonic TH 42PA20 shut down issue

Two schools of thought on the on-site repair issue.

1.) If the power supply module is exchanged, you need to recheck all of the voltages (as they may vary from one unit to another) to see that they are in spec. Tolerances are +/- 1 vdc for most. However, the PIX calibration is done on the assembly line AFTER the power supply is set-up. Swapping modules can possibly cause need for a major realignment.

2.) Usually, no realignment is necessary after replacing only the IC. But, this PCB (and most PCBs for that matter) are multi layer, dual sided. While it can be desoldered on the kitchen table using normal hand tools, this can lead to damaged foil traces of the actual printed circuit and carbonized board material which may lead to future failures. Modern service facilities use various "hot air" vacuum type desoldering systems to minimize board and component damage. Such tools are not easily transported for field use.

Each approach has good points and bad. Conservative shops don't want to risk turning a small repair into a major one by attempting PCB work on-site. Others may keep modern desoldering gear in all their service vehicles and can send out bench qualified techs on-site.

Either way, there should be no charge (consumer has in-home, broadcast does not) to the end-user and hopefully the work will be performed ASAP for all parties concerned.

Techniwizard

Panasonic TH 42PA20 shut down issue

Thanks, Techniwizard... appreciate this information. It serves as a reminder that swapping a PCB is not as straightforward as it might seem, even for those of us who wish it to be so...

I guess I can resign myself to the possibility of an in-shop repair, as long as there wouldn't be any unnecessary delays... I'm hearing now that some shops want to see the failure before they replace any parts, which I can understand the logic for in general, but I'd really like to avoid waiting for the set to die completely... we've already gotten rid of the old set that this one replaced...

Stef1,

Thanks for your feedback as well... I have one or two more shops to call, but it sounds like if I want this fixed, I'll have to pull the plasma down off the wall and let them take it in...

By the way, I'd greatly appreciate it if anyone able to recommend a particular servicer in the Austin area could send me a quick PM...

Thanks,
Descolada

Descolada

Panasonic TH 42PA20 shut down issue

my servicer had no problem pulling out a standard soldering gun and doing it in my living room, as he claimed to have done many times before.

It sounds like a preference of the servicer, but for the consumer model owners, I'd be pissed if they came and took it away for what it easily a 5 minute repair.

NickChicago

Panasonic TH 42PA20 shut down issue

Sorry, forgot to ask something else in my last post... does anyone have the actual service bulletin number for the bulletin that Panasonic sent out regarding this shutdown issue? I read back through the thread and didn't see it noted... I'm hoping this might help the servicers decide to go ahead and order a part before the display dies all the way...

Thanks!

Descolada

Panasonic TH 42PA20 shut down issue

I know of no "publicly" acknowledged service bulletin although Twiz commented in his previous post that this "known shut down issue" information is available internally within Panasonic service channels.

My service center was not aware of this issue at first, but I told them to call their Panasonic tech contact and request the information.

stef1

Panasonic TH 42PA20 shut down issue

I got my new 42PA20U last week and it was DOA (Dead on Arrival) with this problem. I took it back to the retailer for a replacement and the new unit has been operating fine for ~1 week. I didn't record the manufacturing date of the bad unit, but the replacement I got has a manufacturing date of Dec 2003.

Questions:

Based on the experiences of this forum, am I on risk of running into this issue with my new unit?

Has this issue been recognized by Panasonic? Any web links?

Walter L.

Panasonic TH 42PA20 shut down issue

Hello everyone,

I have extended Service Agreement on my 42" Plasma...

Got hit with the shut-down problem a just after 2 years -- close to 3000 hours of viewing time.

After waiting almost a month for the board (the service tech ordered a new board rather than the IC), it was put in and worked great -- for about 6 weeks.

Now it's worse than before, sometimes taking 20 or 30 minutes before it can actually power back on.

Any word from Panasonic on possible recalls, etc.?

The 3rd party that services the extended warranty contract won't consider the tv replaceable until the 4th time the problem occurs.

Thanks
CF

chrisef

Panasonic TH 42PA20 shut down issue

Hello Flt Instr,

My 3 year old Panasonic 42" plasma (TH-42PWD6) just experienced the shut down problem. It was manufactured in August of 2003.

I took your advice and ordered the replacement IC551 part (part # C5HABZZ00123) for $20.02 from Panasonic and installed it myself.

My TV works great now! My wife is so amazed we were able to fix it for so little money. I owe you big for saving us $400+.

THANK YOU!!!!

Peabo

peabo57

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by Techniwizard
When changing the SU and SD, you can remove the sef tapping screw that holds the bezel, lift it slightly and move the bezel forward to give better access to those troublesome ribbon cables. They must fit exactly. If not the unit may still shutdown, show black horizontal lines, or worse yet, short out the panel.

T Wiz
Hey all,
I've got a Panasonic TH-42PX6U with 7 blinks. I unplugged the SU board, bottom half of the screen was ok, so I ordered a replacement SU board. Put it in, the full screen appeared but with black lines across the top, and then a few minutes later, the TV powered down and went back to 7 blinks.

If I only leave the SU board plugged in, the top half of the screen comes on, dark grey color with black lines, then powers down. I've tried replugging the ribbon cables in multiple times, I don't think their alignment/fit is the issue.

Did I short out the SU board? Is there any other way apart from ordering another one to verify that it is in fact the culprit here?

And if I did short it out, does anyone have any spares laying around?

thanks,
Scott

skwiggly

Panasonic TH 42PA20 shut down issue

Sourced my component from Signals UK mentioned earlier & although unfortunately the first one went missing, it's replacement arrived quickly.
Fitted it this evening & so far so good... fingers crossed!

FYI the following is from the Signals website:
"Note: The Replacement IC C5HABZZ00123 is no longer available, The type number has now reverted back to a new STRF6668 B!"

Hopefully all remains well with my panel, many thanks to all the previous posters!

Cheers, Paul

Paden73

Panasonic TH 42PA20 shut down issue

Thanks for the info

Cheers, Paul

Paden73

Panasonic TH 42PA20 shut down issue

Earlier this month October 2003 42PDWD6UY developed shut down problem . Started search online for a solution and found this forum and read and read and read...this started a long time ago! Patient enough to put the puzzle pieces together. Confirmed transistor IC551 had "P" suffix. Ordered part # C5HABZZ00123 ("M" suffix) for about $27 with shipping. Not experienced with soldering electronics, so removed board and took to small tv repair shop in Northern VA: Paul's Audio and Video, 2221 N. Pershing Dr, Arlington, VA 22201 (703-522-5151). Paul has 30+ years experience and removed and replaced the IC for $60. So for less than $90, we're back in business! Trey

trey333

Panasonic TH 42PA20 shut down issue

I never thought my August 2003 built unit will ever be off the hook, 7 blinking lights and i knew right away that the IC551 had gone bad. As what the others did, i took the board to a TV repair shop and paid them $50 to put in the new IC that i bought in January '04, One thing's for sure, Panasonic will never ever have my business from now on, for not acknowledging this issue at all ! Shame on you Panasonic. As a sign of my disappointment, i just place an order thru one of AVS Forum sponsor, Invision Display a Pioneer PDP-5070HD. It could have easily been a Panasonic TH-50PX600U if not for the unacceptable manner Panasonic handled this shutdown issue. Oh well, time to think for my other panasonic brand tools/gadget replacements...digital camera, cordless phones, cordless power drill, dvd players, cellular phone...

1:400_CLCTR

Panasonic TH 42PA20 shut down issue

Hey 1:400_clctr

As Panasonic's Saying :

"panasonic..... Slightly Behind In It's Time."

bbad4all

Panasonic TH 42PA20 shut down issue

bbad4all,

I couldn't agree more with you on that. Seriously, i just can't imagine why did Panasonic ignore this issue at all? Did they not realized that we, shutdown victims/owners will upgrade at some point?

1:400_CLCTR

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by 1:400_CLCTR
I never thought my August 2003 built unit will ever be off the hook, 7 blinking lights and i knew right away that the IC551 had gone bad. As what the others did, i took the board to a TV repair shop and paid them $50 to put in the new IC that i bought in January '04

Looks like I need to do the same. I have the replacement chip. Did you just call a local tv repair shop. I called one & I didn't feel too confident in them so I passed. It seemed they did not do much replacement of individual components but rather replacing whole boards when a chip went bad. Trying to find a place to do this in the bay area, esp the same day or 1 day turn around at most.
Any ideas anyone?

norcalsvt

Panasonic TH 42PA20 shut down issue

Norcalsvt,
Yes, i just look a for local tv repair shop(yellow pages) here in vegas and asked them how much they'll charge to replace an IC, tell them as well that you'll be taking the board with you. I'm assuming you've read this whole thread about this shutdown issue, if not you can go back to posts 376 and 378 where a fellow member took a picture of the board and the IC 551 that needs to be replaced, just to familiarized yourself. You can do it man....Good luck..

1:400_CLCTR

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by 1:400_CLCTR
Norcalsvt,
Yes, i just look a for local tv repair shop(yellow pages) here in vegas and asked them how much they'll charge to replace an IC, tell them as well that you'll be taking the board with you. I'm assuming you've read this whole thread about this shutdown issue, if not you can go back to posts 376 and 378 where a fellow member took a picture of the board and the IC 551 that needs to be replaced, just to familiarized yourself. You can do it man....Good luck..
Thanks for the reply. Actually based on those pages I already took it out & attempted to desolder the chip. It didn't work & I also noticed the chip is very close to a couple of solder pads that I might ruin. I put the board back in & am just trying to find a place to solder it. I will keep trying. Thanks

norcalsvt

Panasonic TH 42PA20 shut down issue

TO ALL PANASONIC OWNERS WITH SHUT DOWN ISSUES:
MY BROTHER, WHO IS A HIGH POWERED ATTORNEY IN NEW YORK CITY AND I HAVE BEEN DISCUSSING THE PROBLEMS THAT HAVE COME UP WITH ALL THE MODELS OF THE PANASONIC PLASMA TV'S. AFTER SHOWING HIM THE PROBLEM I HAVE WITH MY PANASONIC MODEL TH42PW5 (SHUT DOWN AND TWO BLINKING LIGHTS) HE HAS AGREED TO LOOK INTO SERVING A CLASS ACTION SUIT AGAINST PANASONIC. HE HAS ASKED ME IF I WOULD REQUEST THAT ANYONE THAT HAS HAD A FAILURE OF THEIR PLASMA MADE BY PANASONIC
TO CONTACT ME DIRECTLY BY THIS FORUM AT bbad4all WITH YOUR E-MAIL ADDRESS SHOWING YOUR PERSONAL NAME, MODEL/SERIAL NUMBER AND DATE PURCHASED. HE WILL THEN CONTACT YOU IN THE NEAR FUTURE WITH INFO. OF THIS CLASS ACTION SUIT. THIS WILL COVER OWNERS THAT HAVE HAD REPAIRED THEIR PLASMA OUT OF POCKET COST AND FUTURE FAILURES THAT MAYBE OUT OF WARRANTY .

bbad4all

Panasonic TH 42PA20 shut down issue

Add me to the list of Panasonic shutdown owners. I own a TH-42PA20 that I purchased August 2003 with a manufacture date of July 2003, and I just started experiencing the shutdown issue last week. I don't know what my run hours are, but I will use the useful information that was posted here to check. I will probably do what 1:400_CLCTR did and buy the part and remove the board and have a tv repair place install it. Thanks to all that posted their experiences and information on this issue.

andrewpantaleo

Panasonic TH 42PA20 shut down issue

I ordered the chip & brought it to a tv repair shop & he desoldered the old & installed the new chip I had already bought. He only charged me $20.00 for the job. No more shutdown & high pitch wine when turning it on.

norcalsvt

Panasonic TH 42PA20 shut down issue

I too have just joined the club. I purchased my TH42PA20 in Dec 2003 (July 2003 manufacture date) and wouldn't ya know it - last night during the 2nd half of the Superbowl I experienced my first shutdown. Like others, I heard the high pitched whining noise followed by the shutdown and red blinking lights. I was able to re-boot by unplugging. However this was only a temporary fix. It shutdown again and again. I see that there is a possible fix, however I have a question. Has anyone experienced this problem ONLY when using cable TV? After enduring a shutdown this morning while watching cable TV (Comcast) I decided to conduct a non-scientific test. I watched DVDs for hours without incident. Only when I returned to watching cable did I experience a shutdown (within 25 minutes). Is there a correlation between the shutdown and cable TV. Additionally, during the shutdown this morning I was receiving 7 blinking reds - now I'm only getting 5. Any help is greatly appreciated.

Panny hater

Panasonic TH 42PA20 shut down issue

Am in the club with my TH-42PA20. Thanks to all for the important technical information you've provided. I used the instructions here to find my service hours and found that we've only put about 5400 hrs on the set. (Not sure if that's low or high for a 4-yr-old set, but we travel a lot, so my guess is low.)

Mine shutdown for the first time last month. Am 6 mos pregnant and husband is deployed, so I can't get the TV off the wall for the repair, but am enduring the unplug and reboot process over and over. I find mine lasts for about 35 minutes at a time now -- regardless of what I'm watching (satellite or DVD).

I can't get to the serial number, but I assume the part is the same for all of these 2002 models, right? Am planning to go ahead and order it and have the husband deal with it when he gets home in April. Am in agreement with everyone else that a serious acknowledgment by Panasonic along with in-home repair would be a huge plus (especially in my situation) right now.

Thanks again, everyone.

preggers

Panasonic TH 42PA20 shut down issue

And boom there goes my TH-42PWD6 in the UK, 5 blinking lights and squealing noise. lasted a long time, set is probably 3.5 years old.

Just wanted to check the part number i need
#C5HABZZ00123

not #C5HABZZ00115 as i have seen in some threads?

also anyone know of a UK parts seller?

thanks for all the great advice, i would have been forever lost, if it wasn't for this place!

findon

Panasonic TH 42PA20 shut down issue

Another joins the club

My TH-42PWD6 started the shut down problem yesterday.
My unit Manufactured Date JUL 2003
Serial# YB3420048

findon,

I called Panasonic and they told me that C5HABZZ00123 is the same as C5HABZZ00115.

linnmagic

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by linnmagic
Another joins the club

My TH-42PWD6 started the shut down problem yesterday.
My unit Manufactured Date JUL 2003
Serial# YB3420048

findon,

I called Panasonic and they told me that C5HABZZ00123 is the same as C5HABZZ00115.
Not true. 00123 is the one you want.

Techniwizard

Panasonic TH 42PA20 shut down issue

Techniwizard:

I Had My Panasonic Th42pw5 With 2 Flashes Looked At For $65.00 Diagnostic Charge. Tech Guy Says My " Y Buffer " Is Bad. He Wants To Charge Me $450.00 For Labor And The Part . I Took It Home Opened It Up And Found That On Start Up The Ss Board Diode Light Does Come On - But The Sc Board Diode Light Will Not Come On.
Can You Tell Me What Is Wrong?
Thanks!

bbad4all

Panasonic TH 42PA20 shut down issue

My TH-42PA20 took a dump last week while I was turning it on "power-up" and the L.E.D. flashes twice . I've tried to unplug and try again with no luck, just tries to start up then fails and blinks twice at me again and again. I've read this entire thread and unless I missed it didn't see what part I might be able to replace. I've gone through panasonic and got the name of the repair shop and spoke to them and our hrs won't mesh until my business slows down and I can take some time off to take it down. I'd really like to tear into it myself if any one "TW" has any tips or ideas.
It's lame to have a $4000 (not in todays dollars but what I spent) dead display on the wall that I totally did the remodel of my living room around. I work with my hands and am sure I can replace whatever part on whichever board. I believe It was spoke of ( 2 blinks ) in an earlier post but the model of the display was not the same as mine.

Thanks for all the info I've already got as a lurker in past posts.

leading edge

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by bbad4all
Techniwizard:

I Had My Panasonic Th42pw5 With 2 Flashes Looked At For $65.00 Diagnostic Charge. Tech Guy Says My " Y Buffer " Is Bad. He Wants To Charge Me $450.00 For Labor And The Part . I Took It Home Opened It Up And Found That On Start Up The Ss Board Diode Light Does Come On - But The Sc Board Diode Light Will Not Come On.
Can You Tell Me What Is Wrong?
Thanks!
Doesn't sound right. Try running with the SU and SD alternately disconnected from the SC board (leave ribbons connected, and only do one board at a time)

Look for a good top or bottom half of a picture depending on which board is removed. Probably the SU board but if not, find another service center.
Where are you located ?

T Wiz

Techniwizard

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by leading edge
My TH-42PA20 took a dump last week while I was turning it on "power-up" and the L.E.D. flashes twice . I've tried to unplug and try again with no luck, just tries to start up then fails and blinks twice at me again and again. I've read this entire thread and unless I missed it didn't see what part I might be able to replace. I've gone through panasonic and got the name of the repair shop and spoke to them and our hrs won't mesh until my business slows down and I can take some time off to take it down. I'd really like to tear into it myself if any one "TW" has any tips or ideas.
It's lame to have a $4000 (not in todays dollars but what I spent) dead display on the wall that I totally did the remodel of my living room around. I work with my hands and am sure I can replace whatever part on whichever board. I believe It was spoke of ( 2 blinks ) in an earlier post but the model of the display was not the same as mine.

Thanks for all the info I've already got as a lurker in past posts.
This is not the classic failure symptom spoken of in this thread. The power supply failure is usually 5 or 7 blinks.

Yours is probably a similar problem to the unit mentioned before your post although a different model. Same troubleshooting procedure...

Try running with the SU and SD alternately disconnected from the SC board (leave ribbons connected, and only do one board at a time)

Look for a good top or bottom half of a picture depending on which board is removed. Probably the SU board but if not, there is not much more you can do by yourself without electronic test equipment - it wouls need to go to a service center. Where are oyou located ?

T Wiz

Techniwizard

Panasonic TH 42PA20 shut down issue

Albuquerque NM and THANKS

leading edge

Panasonic TH 42PA20 shut down issue

Sorry, I'm not familiar with any service centers out your way.

Try this number:

Plasma Hotline for Priority Service at 1-800-973-4390

The old on-line locator now points to this number only.

T Wiz

Techniwizard

Panasonic TH 42PA20 shut down issue

Techniwizard:
I live in Prescott, AZ will the parts from a TH-42PWD7UY fit my TH-42PW5UZ.
Thanks

bbad4all

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by bbad4all
Techniwizard:
I live in Prescott, AZ will the parts from a TH-42PWD7UY fit my TH-42PW5UZ.
Thanks
Sorry, no they will not. All model years are different.

Industrial TH42PWD5UY boards will fit consumer TH42PW5UZ

Consumer TH42PA20 boards will fit TH42PWD6UY except the tuner and input boards of course.

T Wiz

Techniwizard

Panasonic TH 42PA20 shut down issue

bbad4all,

did you ever figure out which board has failed on your plasma?

I have spare SU, SD, D1, D2, and power boards from the broken plasma (a 5UZ) I bought off of ebay. I don't have a known working SS or SC boards though, as I replaced both of those in my plasma.

Also to anyone swapping out these actual boards, those little ribbon cables are a real PITA to get seated properly. It took me about 20mins to get them right....

boykster

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by boykster
bbad4all,

did you ever figure out which board has failed on your plasma?

I have spare SU, SD, D1, D2, and power boards from the broken plasma (a 5UZ) I bought off of ebay. I don't have a known working SS or SC boards though, as I replaced both of those in my plasma.

Also to anyone swapping out these actual boards, those little ribbon cables are a real PITA to get seated properly. It took me about 20mins to get them right....
FWIW the SC in a TH37PW5UZ and TH37PWD5UZ is the same as TH42PW5UZ. The SS, SU, and SD are different. THE D1, D2, and PS are also the same in the 37 and 42 W5 series.

Prime suspect is the SU. By pulling it from the SC, you can look at the tops of the drive ICs on the underside of these boards. Any cracks or obvious overheating on these ICs will point out the bad board.

When changing the SU and SD, you can remove the sef tapping screw that holds the bezel, lift it slightly and move the bezel forward to give better access to those troublesome ribbon cables. They must fit exactly. If not the unit may still shutdown, show black horizontal lines, or worse yet, short out the panel.

T Wiz

Techniwizard

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by Techniwizard
FWIW the SC in a TH37PW5UZ and TH37PWD5UZ is the same as TH42PW5UZ. The SS, SU, and SD are different. THE D1, D2, and PS are also the same in the 37 and 42 W5 series.

Prime suspect is the SU. By pulling it from the SC, you can look at the tops of the drive ICs on the underside of these boards. Any cracks or obvious overheating on these ICs will point out the bad board.

When changing the SU and SD, you can remove the sef tapping screw that holds the bezel, lift it slightly and move the bezel forward to give better access to those troublesome ribbon cables. They must fit exactly. If not the unit may still shutdown, show black horizontal lines, or worse yet, short out the panel.

T Wiz
Good to know about the SC board being the same with the 37-5U series as well. I spent a good amount of time cross referencing part numbers to make sure that I bought a dead plasma that would provide the proper parts for my 5UY.

Also good to know about moving the bezel, too bad I didn't know this before I wrestled with those cables I was getting the black horizontal lines, so I would power the unit on briefly to determine which ribbon cable was mis-adjusted (each cable represents a section of the screen), power off, adjust that one and re-power. I'm glad I DIDN'T know that it could result in a panel short out, as I probably would have gotten nervous and broken something .

Quick question: is there a "trick" to disconnecting the SS2/SS3 child boards from the SS board? I actually ruined the cable/connector on my "old" board when disassembling (was putting together a disassembly/packing how-to for the person I bought the parts from), but it sure looks like those boards "should" be able to seperate. No big deal, as I was going to replace the SS / SS2 / SS3 boardsets anyhow, just curious.

Cheers,

Rich

boykster

Panasonic TH 42PA20 shut down issue

Rich,

The connector pulls straight up from the SS2 and SS3. Notice there are small "tabs" on either side of these connectors. Gingerly use the thumb and forefinger to "rock" the beast until it pulls up.

Sometimes it's just easier to change the entire assembly including the sub-boards.

TW

Techniwizard

Panasonic TH 42PA20 shut down issue

TW,

Thanks, that's how I figured it should work, but for some reason the board I tried to remove I somehow applied too much pressure in the wrong place. I did end up just replacing the entire assembly, and had the seller of the "donor" plasma pull all 3 boards as one unit to avoid him possibly doing the same damage.

If I ever need to re-visit the SS board issues (replaced SC and SS boards without fully diagnosing which board was the culprit) I could possibly replace the sub-board I damaged and re-purpose the "old" SS board. Those pesky SS and SC boards are expensive.....

Cheers,

Rich

boykster

Panasonic TH 42PA20 shut down issue

Code:
         
       o          "We're not worthy, we're not worthy"  
      <|\      o__
     _/ \_    _/  \_ 
 Techniwizard

jlib

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by jlib
Code:
         
       o          "We're not worthy, we're not worthy"  
      <|\      o__
     _/ \_    _/  \_ 
 Techniwizard
No need to grovel, just remember knowledge is power...

Techniwizard

Panasonic TH 42PA20 shut down issue

I got the parts(C5HABZZ00123) yesterday, it took me 30 mins. to install it. No more shut down problem. For those of you installing it yourself, be careful not to put too much solder, the trace on the pc board are very close to each other that if you put too much solder, it can make a short circuit. if somebody needs help with the same problem, let me know. I live in the Bay Area.

linnmagic

Panasonic TH 42PA20 shut down issue

Hi! We've had this problem with our TH-37PA20 over the past three years but just dealt with it until now, it won't turn on at all, just whistles. So now we have to get it fixed. We've considered trying to do it ourselves to save money but I'm kind of afraid we'll mess something up. Any idea of a good repair center in the Seattle area that is aware of this issue?

Thanks!
Kelly

girlfloyd

Panasonic TH 42PA20 shut down issue

Techniwizard
I Have A Broken Panasonic Th-42pw5 Plasma Tv.
Can You Tell Me What Panasonic Plasma Model Tv's Are Available On E-bay That Can Be Used For Parts To Fix My Plasma Tv.

Thanks

bbad4all

Panasonic TH 42PA20 shut down issue

TH42PWD5UY is the same as TH42PW5UZ

Thw 37 inch versions TH37PWD5UY and TH37PW5UZ use the same power supply, D board, and SC board. The SS, SU, and SD boards are different between the 37 and 42 inch units.

Be very careful of what you buy on Ebay.

Techniwizard

Panasonic TH 42PA20 shut down issue

If you look a few pages back, I listed the ebay search phrase I used. I got lucky and got essentially a brand new plasma with a broken panel. Hard to say what you might find....

boykster

Panasonic TH 42PA20 shut down issue

Our 37" Plasma TV, model # TH-37PD25 EDTV, died Friday (April 27)-- without any warning!

We get the 1 long light and 11 blinking lights. Anybody know what that diagnostic code is for? What part do we need to order from Panasonic?

We'd appreciate any help we can get from the members of this forum. Our LAST resort will be to take it to an authorized Panasonic repair shop here in Indianapolis.




***As a side note: We've had the TV for only 2 1/2 years ( bought Sept 2004 - built May 2004). We paid $2500 for it and figured it would last a LOT longer before dying! We paid $800 in 1980 for our Sony console TV. It lasted 24 years and never had one repair!***

dvder

Panasonic TH 42PA20 shut down issue

I've got a broken TH-42PA25 I'm trying to fix.

It had fried SU and SD boards. I took off most of the chips on those boards and now I have 1/8th of my screen working (~ 64 rows) so I think its just those boards. However the heatsink on IC551 gets too hot to touch if the tv is on for just a few minutes. Is this normal?

The temperature seems to stabilize, it just seems wierd that there isn't a fan there if the heatsink is meant to run that hot. All voltages check out.

Also, please let me know if anyone has any extra compatible SU and SD boards sitting around they want to sell. ;-)

jimp40

Panasonic TH 42PA20 shut down issue

Add another to the list!!! I have a TH-37PD25U-P manufactured OCT 2004. Bedroom set, wall mounted, rarely used. Never shut down, then one day a big POP and green flash of light from the rear and it's dead. Red light flashes 7 times. I open the back and find that damn IC551 has EXPLODED! It is on the AH board and has the M suffix. THIS IS A JOKE PANASONIC! I will NEVER buy another Panasonic product again! There are SO MANY people on here reporting this problem, just imagine all the people who are NOT REPORTING on this site that have had the same problem! UGGGH!

TuffyRosie

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by TuffyRosie
Add another to the list!!! I have a TH-37PD25U-P manufactured OCT 2004. Bedroom set, wall mounted, rarely used. Never shut down, then one day a big POP and green flash of light from the rear and it's dead. Red light flashes 7 times. I open the back and find that damn IC551 has EXPLODED! It is on the AH board and has the M suffix. THIS IS A JOKE PANASONIC! I will NEVER buy another Panasonic product again! There are SO MANY people on here reporting this problem, just imagine all the people who are NOT REPORTING on this site that have had the same problem! UGGGH!
TuffyRosie...I've started a new THREAD for our Plasma TV ("Panasonic TH-35PD25 - DEAD") http://www.avsforum.com/avs-vb/showthread.php?t=841583

How about if you, and EVERYONE that has one of these DEAD Plasma TV's, add your post to that thread, too. Also, let us know if any of you were able to repair the TV at a reasonable price.

dvder

Panasonic TH 42PA20 shut down issue

Replaced IC551 and it didn't help at all. Any other suggestions? Still getting the red light flashing 7 times.

TuffyRosie

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by jimp40
I've got a broken TH-42PA25 I'm trying to fix.

It had fried SU and SD boards. I took off most of the chips on those boards and now I have 1/8th of my screen working (~ 64 rows) so I think its just those boards. However the heatsink on IC551 gets too hot to touch if the tv is on for just a few minutes. Is this normal?

The temperature seems to stabilize, it just seems wierd that there isn't a fan there if the heatsink is meant to run that hot. All voltages check out.

Also, please let me know if anyone has any extra compatible SU and SD boards sitting around they want to sell. ;-)
Did you ever find these PCBs ?

TW

Techniwizard

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by TuffyRosie
Replaced IC551 and it didn't help at all. Any other suggestions? Still getting the red light flashing 7 times.
Likely that you may need the entire Power Supply PCB. Something caused the IC551 failure so just replacing that would probably not fix it as you have discovered.

TW

Techniwizard

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by Techniwizard
Did you ever find these PCBs ?

TW
Panasonic sells them for $100 each. I'm now sure enought that the tv should work with new boards that I will probably spend the 200 on new boards if I don't find a cheaper source.

I'm an electrical engineering student, I bought the tv already broken as a project to see if I could fix it easily. I was hoping it would be ic551 or something small.

I emailed someone who bought a broken tv on ebay to see if he used those boards. He told me he thinks he still has them and will check in a few days when he gets home.

I'll let you know if that doesn't work out.

Thanks,
Jim

jimp40

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by Techniwizard
Likely that you may need the entire Power Supply PCB. Something caused the IC551 failure so just replacing that would probably not fix it as you have discovered.

TW
At this point I'd rather just sell the thing to someone who needs parts. That, or roll a few bowling balls at it.

What a major, major bummer this has been. I swear I will NEVER buy another Panasonic product again. They should acknowledge the design flaw and fix it. It's the right thing to do.

TuffyRosie

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by Flt Instr
Shutdown Fix for the 42PWD6UY (Commercial Unit) & 42PA20 (Consumer Unit)


Problem: Upon turning on TV, loud hissing noise could be heard. Once the TV was on and running, when the power was interupted the TV would shut down. Either 5 or 7 blinks will occur depending on unit. It would take 15min to 4hrs to be able to get the TV back on, followed by it shutting down once again.

Fix: Order the new transistor (Part# C5HABZZ00123) from Panasonic for $20.02 plus shipping, comes up to about $30 total.

Remove the back off the unit, find the IC551 on the power supply board. The board is located near the top and off center to the right. The transistor your looking for is located to the far right on the board, attached to a cooling bar. You'll notice most the IC's on this board begin with the number 5, you've got the right board.

Find IC551 and the black transistor with a screw through it, this is the transistor you want. This part number should be CXA1315P, but don't be worried if you don't find it printed on the transistor. Remove the board by unplugging everything and unscrewing the board (5 screws I believe). I wraped the board and

I went to a Local TV Repair guy (a friend) and had him replace the old transistor (CXA1315P) with the new transistor (C5HABZZ00123). Took about 15min with no charge. If you were charged, I'd estimate maybe $20 for his time.

Replace the board, plug everything back in, screw everything into place, and your ready to go. I ran my TV for hours on end to make sure it wouldn't quit. After three weeks of testing the TV through everything that would shut it down, I have yet to experience anything. The TV is NEW AGAIN!!! I am confident this was the issue and has been solved with the new transistor.

The Panasonic Authorized Repair Center in Denver, CO quoted me $500+ for the repair. Another posting showed a bill of $519.19 for his repair from Denver, and he was without his unit for nearly a week. With a little research online, I fixed my Plasma for $30, and it took about an hour from off the wall to back on the wall!!!

I don't check these posts regularly, but figured I owed it to these forums to post this considering this is where I received most of my research. I hope this posting helps.

Thanks for the information. my TH42PA20 is as good as new again! Total Cost is 55 bucks.


Jack

jacky9961

Panasonic TH 42PA20 shut down issue

Hi everyone, as a new member of the 7 blink club. I'm glad I came across this forum, cuz my TH-42PA25 Panny did the shutdown mischief as everyone else's in this thread. I took out the board with the culprit part (IC551) and after reviewing this thread, part number P6668M for IC551 which is supposed to be the updated version, is what I have originally installed on the board. Manufactured date for the unit is March 2004. Has onyone had theirs fail even with the updated IC551? I will just order the chip from Panasonic and install it myself, but before I do I would like to know if this has happened to anyone else with the new IC.

Dinomax

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by Dinomax
Hi everyone, as a new member of the 7 blink club. I'm glad I came across this forum, cuz my TH-42PA25 Panny did the shutdown mischief as everyone else's in this thread. I took out the board with the culprit part (IC551) and after reviewing this thread, part number P6668M for IC551 which is supposed to be the updated version, is what I have originally installed on the board. Manufactured date for the unit is March 2004. Has onyone had theirs fail even with the updated IC551? I will just order the chip from Panasonic and install it myself, but before I do I would like to know if this has happened to anyone else with the new IC.
This would not be the same problem. The IC 551 with the B suffix was only on June-Aug 2003 production. Every failure of this model is not automatically IC 551 even though many of you would like to believe so.

The TH42PA25 is an updated TH42PA20 similar to the TH42PWD6UY and the updated TH42PWD6UYA. IC 551 was changed at the factory long before these models were introduced, (Jan 2004) so there is probably some other failure on the Power Supply PCB that requires service.

This board is the later TNPA2841AH, with the AH suffix having the newer IC 551.

Most service centers will quote $3-400 for this PCB, which can only be ordered by a service dealer, plus labor.

It becomes more economical to swap the entire PCB that to troubleshoot at $150-$200 per hour labor rate and end up with a $600 labor charge and a $20 part.

Techniwizard

Panasonic TH 42PA20 shut down issue

Thanks Techniwizard for your reply. As you mentioned, swapping the pcb may be a more cost effective solution in this case where the parts are the updated version, and yes, the board has the "AH' suffix on it. I'm glad I came across this forum, and people willing to share their knowledge with this technology. I used to work on old TV's (vacuum tubes and a few transistors) in my days, and have been out of it for awhile.

Dinomax

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by PowerStrokeHD
Dead_42PW5 & boykster...

If you look back a page in this thread you can see I had the same problem as both of you. Well sorry it took so long but I have a update. Its been fixed.
It turned out to be the SC PCB. Once I was able to get the board, it took about 15 minutes to pop it in.

Note to others reading this:

This problem while being a shut down issue is in no way related to the power supply problem that started this thread, although similar. Below is a link from another member to a video showing our problem. So if your plasma does this, it is more than likely a SC PCB gone bad.

http://www.vimeo.com/clip:73124

MadnSA was your problem power supply or SC PCB related?
Hi all,

I finally decided to bite the bullet and purchase an SC board (TNPA2534AE). Total costs was about $580 ($520 + tax and shipping) from www.partstore.com. I installed it last night and it works. I would like to point out 3 things:

1. This is the REV E board. My origianal board was REVD. I did a quick check and noticed that 4 Power MOSFETS or bipolar transisotrs were added. These were unstuffed in the REVD board. Since these "placeholders" existed in REVD it is obvious that Panasonic anticipated a potential problem in this circuitry. Instead of stuffing these components at a cost of maybe $0.50 or a $1 they decided not to, their board became less reliable, and they pissed off alot of customers. Great job Panasonic.

2. I did not see the exact failure shown in the video. I did get the 2-flash diagnostic but no screen flash.

3. Panasonic customer service is so worthless as you all know. The said they "might" be able to give me a discount on a new set if I took my bad set in and paid for the diagnostic. Yeah right.


Anyway, thanks for all of the info on this great board. You may want to look back at some of my previous posts to see if my observations (LED sequence, probe voltages, etc.) match what you are seeing if you have the 2-flash diagnostic code.

Good luck to all

Dead_42PW5

Panasonic TH 42PA20 shut down issue

With respect to my previous comments I don't know if the board failure was related to the circuitry where Panasonic added more transistors. However, the fact that they added them on REVE still tells me that this circuit still needed to be improved.

Also, if you do any probing be careful because there is alot of high voltage on these boards.

Dead_42PW5

Panasonic TH 42PA20 shut down issue

Wow, glad it worked out for you, but ouch on the price!!!

I'm glad I was able to find a dead 5UY off of ebay to act as a donor.....

boykster

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by Dead_42PW5
With respect to my previous comments I don't know if the board failure was related to the circuitry where Panasonic added more transistors. However, the fact that they added them on REVE still tells me that this circuit still needed to be improved.

Also, if you do any probing be careful because there is alot of high voltage on these boards.
Changes are quite common during a model's production run. Usually it involves parts changes, many times to a cheaper part or different source vendor. The additional parts did nothing for reliability or improvement in this case, the later boards were used across both consumer and industrial lines to lower the required number of replacement parts that needed to be stocked. This board also fit the 37 inch models of this series.

Techniwizard

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by Dinomax
Thanks Techniwizard for your reply. As you mentioned, swapping the pcb may be a more cost effective solution in this case where the parts are the updated version, and yes, the board has the "AH' suffix on it. I'm glad I came across this forum, and people willing to share their knowledge with this technology. I used to work on old TV's (vacuum tubes and a few transistors) in my days, and have been out of it for awhile.
I've been bit by the HV out of a 6JE6 many times. Fond memories.

Techniwizard

Panasonic TH 42PA20 shut down issue

I'd also like to thank everyone on this forum. This forum has been a great resource for me in fixing my 42PA25.

I put in new SD and SU boards and it seem to work fine. I also added a 12v fan pointing at the IC551 heatsink since it was very hot and I want the tv to keep working.

I'm attaching some pics of my burned chips and boards and the fan I added.

-Jim

jimp40

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by Techniwizard
Changes are quite common during a model's production run. Usually it involves parts changes, many times to a cheaper part or different source vendor. The additional parts did nothing for reliability or improvement in this case, the later boards were used across both consumer and industrial lines to lower the required number of replacement parts that needed to be stocked. This board also fit the 37 inch models of this series.
No disrespect Techniwizard but designer's usually don't put options on the boards unless there is the potential for a future problem. The REVE board appears the same as REVD but REVD had unstuffed components. If this was a cost reduction cheaper components or different circuitry would have been used. Generally speaking cost reductions utilize 2nd-source components which are pin-compatible to the previous components but which are cheaper or from a preferred vendor. I would agree with your comments if transistors had been REMOVED, and not added.

Dead_42PW5

Panasonic TH 42PA20 shut down issue

Well they could have switched to cheaper transistors that can take less current and used more of them instead. But if the part numbers are the same, then they probably anticipated the problem.

jimp40

Panasonic TH 42PA20 shut down issue

My 42" Panny ED 42PWD6 is shutting off again with the 5 to 7 light blink thing. I am frustrated as it has done this for 2 years. I have never taken the time to research the problem as it would correct itself for a period of time. Now, I cannot get the TV to stay on for just a few minutes. Like everyone else, it whines when it is turned on. It also whines when it cuts off. Now I am whininig.

Should I order the replacement part C5HABZZ00123 to fix this problem? The IC 551 part that I have is Part #F6668B. It was manufactured in Sept 2003. Quite likely it was using the culprit product.

Alan

alank

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by Dead_42PW5
No disrespect Techniwizard but designer's usually don't put options on the boards unless there is the potential for a future problem. The REVE board appears the same as REVD but REVD had unstuffed components. If this was a cost reduction cheaper components or different circuitry would have been used. Generally speaking cost reductions utilize 2nd-source components which are pin-compatible to the previous components but which are cheaper or from a preferred vendor. I would agree with your comments if transistors had been REMOVED, and not added.
No disrespect taken. However as it turns out, there were only two versions of this PCB, TNPA2534 originally with no suffix for the 42 inch and with suffix AB for the 37 inch. Only the 37 inch board was stocked as a service replacement and had as you have seen 4 extra power mosfets and one other in another location.
As the power mosfets appear to be all in parallel, perhaps they were driving the 37 harder to achieve the same level brightness or some other reason that we can only speculate now some 5 model series later.

The 37s came with the "extra parts" from the start of production so their reason for being was not some "improvement" but as part of the original 37 design.

The schematic never changed throughout production although the board layout may have leading to the D and E revisions, D for the 42s and E for the 37s.
SC schematic attached showing 37 additional parts noted in dashed boxes.

BTW, did you check with "PARTS STORE" for a DUD credit ? Many of these boards carried a $150 board return credit that would take some of the sting out of that board's high price tag.

Techniwizard

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by jimp40
Well they could have switched to cheaper transistors that can take less current and used more of them instead. But if the part numbers are the same, then they probably anticipated the problem.
See above...

Techniwizard

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by alank
My 42" Panny ED 42PWD6 is shutting off again with the 5 to 7 light blink thing. I am frustrated as it has done this for 2 years. I have never taken the time to research the problem as it would correct itself for a period of time. Now, I cannot get the TV to stay on for just a few minutes. Like everyone else, it whines when it is turned on. It also whines when it cuts off. Now I am whininig.

Should I order the replacement part C5HABZZ00123 to fix this problem? The IC 551 part that I have is Part #F6668B. It was manufactured in Sept 2003. Quite likely it was using the culprit product.

Alan
Yes, order the part, it will have an "M" suffix instead of your "B"
Order number is different than the number stamped on the part.
C5HABZZ00123 is the correct part to order.

Techniwizard

Panasonic TH 42PA20 shut down issue

Thanks Techniwizard. There is a packing slip which states that I should get a DUD credit although partstore did not specifically say so. When I was looking at another distributor it did say that there was about a $150 core charge included in the price (also ~$520) so I assume that I will get a similar amount back. I will let everyone know if I get the credit back.

Dead_42PW5

Panasonic TH 42PA20 shut down issue

Wpozo,

From the city, bring the unit over to the Factory Service Center in Secaucus.

Call 201-348-7975 and ask about "Plasma Repair" they'll hook you up.

Techniwizard

Panasonic TH 42PA20 shut down issue

Thanks for the reply T Wiz. I actually didn't even count the blinks. Within a few minutes, I was on the line with DTV City and Panasonic, and within an hour the PDP was boxed and ready for exchange. I'm hoping this is a fluke and not something that will happen again.

MDRbone

Panasonic TH 42PA20 shut down issue

No, defects on the 8 series are quite low, in the tenths of 1% like 0.1- 0.2 so you're pretty safe.

Techniwizard

Panasonic TH 42PA20 shut down issue

I bought a Panasonic TH42PA20 in August of 2003 (manufactured in June 2003) and last week or so it started the infamous shutdown. Prior to coming to the website I contacted Panasonic to get an idea as to what might be causing the problem and they told me that it could be that the power to the outlet is fluctuating and the TV is protecting itself by shutting down. They suggested trying a different outlet, so 9 outlets later I was still having the problem.

With this information I contacted the power company and they came to the house to check the power supply and lines that run to my house and said I was fine, but to be sure they installed a device that monitored my power for several weeks to see if things were kosher.

In the meantime I started to do some research and came to the forums and found that folks had the same problem as me. Techwizard laid things out well and I appreciate your dedication to this issue. My unit had an extended warranty through Mack Camera and the call was made. A little hassel with them to get the paperwork in and to find a local vendor willing to come to the house to make the repair and a week later the tech arrived.

The tech came yesterday, I helped him remove the TV from the wall and he went to work. He took out the board and began removing the faulty part by removing the solder and screw holding the part to the board. He replaced the part with a new part, put it back together and hung it on the wall. This took approximately 45 minutes total for the tech to do all the repairs and to have my TV back working. The cost that was submitted to Mack Camera for the work was $165.00 total. I have not had the TV on much since the fix, but so far so good.

The few things I took away from this whole experience is:

1. Get the extended warranty for equipment that costs greater than $1000
2. Before placing the TV on the wall, get the serial number and write it down somewhere so you have it for issues like these.
3. Use this forum for issues you may be having with your equipment, as other folks may be in your same situation.

By the way, the power company called me today and said I had no time during the last two weeks where I had a drop in power coming into the house. So that is some good news there that I can use in the future when someone tells me to check the power.

I would like to thank everyone in here, especially techwizard for their insight and experiences. It led to me having an almost painless experience in getting the repair done. Thanks Again!

Tillerman

Tillerman

Panasonic TH 42PA20 shut down issue

Glad it worked out for you. Others have paid twice that amount which of course will vary by area and is not unusual.

Techniwizard

Techniwizard

Panasonic TH 42PA20 shut down issue

Long time lurker, first time poster. I have followed this thread with some interest when it first came out as I have a TH-50PHD6UY purchased in Sep '03. Due to no reports of 50" issues, figured I was safe. Panicked call from wife today at work indicated that I may have the same issue. On power-on, the screen dies and the standby light flashes 7 times. The part I'm concerned about is that the screen displays a smallish box in the upper right quadrant with some vertical lines in it prior to shut-down.

Techniwizard, or whoever may know. Does the box w/ the vertical lines indicate another issue, or is this similar to the known 42" ED issue?

pplatt

Panasonic TH 42PA20 shut down issue

bump

pplatt

Panasonic TH 42PA20 shut down issue

The 50 inch never had the problem that the first couple months of the 42 WD had.

The "lines" are probably the corrupted initial menu video. Sounds like the scan sustain has gone south.

Actually, the scan flash codes are counted as they go dark,not as they light up. So if you have 7 lit, it may really be a code 6 which is only fan rotation failure. There are two fans in the 50H6. If one should get clogged with dust bunnies or develop a bad bearing and slow or stop rotation, the unit will go to shutdown with 6 blinks of the LED.

You might be able to check the fan by yourself if you are brave, otherwise it needs to go in for service. Depends on your location where it should go.

Techniwizard

Panasonic TH 42PA20 shut down issue

T. Wiz,

Thanks for the response. I mis-typed in my first post. I meant to say that it looks like the light goes dark 7 times. Do I count from the first dark? If so, it goes dark 7 times.

Based on one of your earlier posts, the first thing I checked was that both fans did spin up. From what I can tell, both fans do spin up on startup. I did take apart the back casing and cleaned both fans in case there was another issue. I also disconnected each of them in turn. With one or both fans disconnected, the flash code did not change.

Question, when does the shutdown sequence check fan rotation? If it's early in the sequence, this would point to one/both fans spinning below spec.

You mention the scan sustain, could that cause a shutdown issue by itself?

If the issue doesn't sound like a faulty fan or some other relatively easily diagnosible/fixable issue, any recomendations on where to take it for service would be appreciated. I'm in Colorado Springs, CO.

pplatt

Panasonic TH 42PA20 shut down issue

Has anyone experienced the shut down issue with the Panasonic TH-42PX50U ?

I purchased 2 in July '05 and one has has shut down randomly about 12 times since then (The other was for a relative and gets very minimal use). Initially, I thought maybe the sleep timer was set incorrectly - I had originally set it to shut down every night at midnight, incase I fell asleep while watching . However, I can now rule out the timer(disabled), but the problem persists. On my first call to Panasonic, the rep asked if there were any diagnostic lights upon shut down - there are none. The TV is now in the shop for almost 2 weeks, and I can't seem to get a clear status from the service provider or from Panasonic. I called Panasonic today, and the rep indicated that if they can't reproduce the problem at the shop, they will have to look at other issues, like "environment". She then proceeded to ask a bunch of questions about how/where the TV is installed. Is it over a fireplace? (yes), gas or wood-burning? (gas), is it on a Panasonic mount? (not sure). I get the feeling that if they can't reproduce the problem, that they are going to blame it on the installation. Lastly, I asked the rep if there were any Panasonic rules/protocols for transporting plasma sets, and she indicated that they should always be transported vertically. Although I provided the pedestal stand to the service tech, he insisted on placing the unit on it's back in his van. Should I be concerned about this? Thanks

codejockey

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by pplatt
T. Wiz,

Thanks for the response. I mis-typed in my first post. I meant to say that it looks like the light goes dark 7 times. Do I count from the first dark? If so, it goes dark 7 times.

Based on one of your earlier posts, the first thing I checked was that both fans did spin up. From what I can tell, both fans do spin up on startup. I did take apart the back casing and cleaned both fans in case there was another issue. I also disconnected each of them in turn. With one or both fans disconnected, the flash code did not change.

Question, when does the shutdown sequence check fan rotation? If it's early in the sequence, this would point to one/both fans spinning below spec.

You mention the scan sustain, could that cause a shutdown issue by itself?

If the issue doesn't sound like a faulty fan or some other relatively easily diagnosible/fixable issue, any recomendations on where to take it for service would be appreciated. I'm in Colorado Springs, CO.
You can go to the web www.Panasonic.com and search under SUPPORT - FIND A SERVICER which will ask for the model number and zip code and then return a list of those in the area.

If you need more, PM me tomorrow and I'll hook you up with the regional engineer in Denver.

TW

Techniwizard

Panasonic TH 42PA20 shut down issue

Looks like I'm part of the blinking light club. I have a August 2003 42PA20 that just started shutting down last week. It flashes 6Xs and stays steady on the 7th. It normally shuts down after using the set for an hour or more. Is this the IC 551 issue that is well documented here or possibly a fan issue. Usually after having the 42PA20 on for a while the room temperature rises. I haven't noticed that as much recently. It could be that the house is a bit cooler since it is February.

It's out of warranty so should I still call the Panasonic 800-211-7262 support number first? Any suggestions on service centers in Central Jersey, East Brunswick area? Any help to make this as painless as possible would be much appreciated.

floodhaus

Panasonic TH 42PA20 shut down issue

Quote:
Originally Posted by floodhaus
Looks like I'm part of the blinking light club. I have a August 2003 42PA20 that just started shutting down last week. It flashes 6Xs and stays steady on the 7th. It normally shuts down after using the set for an hour or more. Is this the IC 551 issue that is well documented here or possibly a fan issue. Usually after having the 42PA20 on for a while the room temperature rises. I haven't noticed that as much recently. It could be that the house is a bit cooler since it is February.

It's out of warranty so should I still call the Panasonic 800-211-7262 support number first? Any suggestions on service centers in Central Jersey, East Brunswick area? Any help to make this as painless as possible would be much appreciated.
Send me a PM tomorrow

TW

Techniwizard

Panasonic TH 42PA20 shut down issue

Mine just started doing it last week... have an Oct '03 42PWD6UY... I get "Unable to locate a matching model number." ... for zip 91362

Anyhow found out servicers & made a few calls AUDIO SERVICE CENTER in LA (323) 935-1175 were the most upfront... $150 for the fix & $75 for pickup & delivery.

Techniwizard & those who know, did any of you have had any experience with this center ? Mine is scheduled to be picked up tomorrow afternoon.

Thanks for the responses in advance!

dadnan

Panasonic TH 42PA20 shut down issue

I dunno , for west coast you can call the Panasonic Broadcast Service center in Universal City at 323-436-3503 and ask for my friend Jim. I think this is one of their authorized service centers.

T Wiz

Techniwizard

Panasonic TH 42PA20 shut down issue

TechWizard and the many fine contributors of this thread.

I just joined the 7 blink club. TH-42PWD6 Manf 6/03 I was one of the first in the country to have one. Never a problem. I bought from Visual Apex, a great forum sponsor.

I went back and reviewed nearly every post on this thread. and have counted many different reactions to this shameful Panasonic issue. It can be offered that in the day of beancounters saving a Yen or two makes a difference. Yet, add it all up to how fast bad word of mouth travels, this has to cost Panasonic loads in the long haul not to have sent a campaign notice for repair to all that could possibly been included. This has been reported on this thread to be a very small percent.
I also remember Techwizard saying it failure rate would be within early use if it was to fail. I wonder how many of these are yet to come?

All I can say judging from the amount of people who had it on this forum, this must be much larger than reported. I would think Panasonic would want to contain this one, given how early it was detected. I am only sorry I had not seen it on this forum before the expiration of my warranty date.

If I get this right, if this well noted ticking bomb went off earlier than latter for those over the warranty period, then they get stuck compared to some leniency offered by Panasonic.

Techwizard, Although you have been of considerable help and support to people here who have been pulling their hair out, I still have to view you as someone who work in public relations for Panasonic. I might add you do a superb job at it. I have to remember it is your job to put out or put water on fires.

Up to date it has cost me $3 a day to view this (and I must say) very good viewing plasma. That number will go up now. This reminds me of when Ii was a teenager (a long time ago-I'm now 55) I bought a Sony Receiver and in short time it failed. I told I myself, I would never buy Sony again, and I didn't. That was 37 years ago.
I will say now that I will never buy a Panasonic product again and neither will those who ask my opinions of them.
It was not that this problem happened it was and continues to be the shameful way Panasonic has handled this. I will go have it repaired and learn a valuable lesson. Thanks all for their very valuable contributions to this thread. Tom

Mine is the what you refer to as the commercial model TH-42PWD6 manf 6/03 I haven't looked hours up,but we don't look at it too much.

TechWizard or anyone, if you can please direct me appropriate repair facility, I would appreciate it. I live in Central Florida between Tampa and Orlando zip 33803 carmantom@highstream.net

Thanks, I feel better.

Carmantom

Panasonic TH 42PA20 shut down issue

Shutdown Fix for the 42PWD6UY (Commercial Unit) & 42PA20 (Consumer Unit)


Problem: Upon turning on TV, loud hissing noise could be heard. Once the TV was on and running, when the power was interupted the TV would shut down. Either 5 or 7 blinks will occur depending on unit. It would take 15min to 4hrs to be able to get the TV back on, followed by it shutting down once again.

Fix: Order the new transistor (Part# C5HABZZ00123) from Panasonic for $20.02 plus shipping, comes up to about $30 total.

Remove the back off the unit, find the IC551 on the power supply board. The board is located near the top and off center to the right. The transistor your looking for is located to the far right on the board, attached to a cooling bar. You'll notice most the IC's on this board begin with the number 5, you've got the right board.

Find IC551 and the black transistor with a screw through it, this is the transistor you want. This part number should be CXA1315P, but don't be worried if you don't find it printed on the transistor. Remove the board by unplugging everything and unscrewing the board (5 screws I believe). I wraped the board and

I went to a Local TV Repair guy (a friend) and had him replace the old transistor (CXA1315P) with the new transistor (C5HABZZ00123). Took about 15min with no charge. If you were charged, I'd estimate maybe $20 for his time.

Replace the board, plug everything back in, screw everything into place, and your ready to go. I ran my TV for hours on end to make sure it wouldn't quit. After three weeks of testing the TV through everything that would shut it down, I have yet to experience anything. The TV is NEW AGAIN!!! I am confident this was the issue and has been solved with the new transistor.

The Panasonic Authorized Repair Center in Denver, CO quoted me $500+ for the repair. Another posting showed a bill of $519.19 for his repair from Denver, and he was without his unit for nearly a week. With a little research online, I fixed my Plasma for $30, and it took about an hour from off the wall to back on the wall!!!

I don't check these posts regularly, but figured I owed it to these forums to post this considering this is where I received most of my research. I hope this posting helps.

Flt Instr

Panasonic TH 42PA20 shut down issue

TechnoWizard,

Thanks for your help hooking me up w/ the Regional guy here. He sent me the I.C. It cost about $25 shipped and I had an authorized repair facility in town. He charged me $75. I suppose $100 for after 2 1/2 years use wasn't too bad.

I think I was more freaked out not knowing how bad it might be. It's a good thing for these forums.

Tom

Carmantom

Panasonic TH 42PA20 shut down issue

Glad it worked out for you.

Techniwizard

Panasonic TH 42PA20 shut down issue

This is cross-posted on the "Official Panny Thread" for the PX50U models. While it doesn't relate to the 42PA20 model, I thought someone here might be able to help. I apologize for any inconvenience.

I purchased my TH42PX50U in mid-December, and in the last week it has begun to act badly. When it has been on for about an hour, it will suddenly cease operating. The small red light on the from panel, which is supposed to communicate to the informed user what is wrong, glows steadily for a minute, then begins flashing in a code that is too rapid for my eyes to comprehend. Finally, after five minutes or so, the thing switches off, then back on, and operates normally for 30 minutes or so.

I have called the licensed repair folks in my area (Sacramento, CA), and they have ordered a new power supply from Panasonic. But, they report that this does not appear to have happened to anyone else.

So, my questions: First, has anyone had a problem similar to mine? And, second, does anyone have any thoughts on what might be wrong?

Thanks for any thoughts you might have.

dday

Panasonic TH 42PA20 shut down issue

I have a TH-42PWD6UY. It sounds like I have the usual problem, but I'd appreciate Techniwizard's and others thoughts.

Here are the symptoms:
(1) Whistling/squealing sound at initial startup.
(2) After the unit has warmed up and typically adjacent to a black screen (between commercials, for instance) the unit shuts down and whistles/squeals again.
(3) The red Power On light flashes on for six short intervals and one long interval (or off for seven short intervals). This pattern repeats.
(4) To turn on the unit, I have to push the power switch on the unit twice, to turn it off then on. Again, the unit whistles/squeals at startup.
(5) Steps (2) to (4) recur a few times each evening.

I live in zip code 94062 in the San Francisco Bay Area. I would appreciate advice. Thanks, in advance!

steves59

Panasonic TH 42PA20 shut down issue

sounds like it.

Check the web for a service center nearby.

Techniwizard

Panasonic TH 42PA20 shut down issue

Steves59,
In the BA, I had Media Associates fix my 6UY. They are authorized Panasonic servicer, ph. (650) 968-2444

hiker

Panasonic TH 42PA20 shut down issue

Thanks, gents!

steves59

Panasonic TH 42PA20 shut down issue

I've happily owned a Panasonic TH-42PA20 for over 2 years now. Just this past week, it began to shut itself off (I think only during HD viewing, but I haven't been able to verify this--I'm using a Comcast box via DVI). After it shuts itself off, the power light indicator (by the power button) blinks a few times, pauses, and repeats itself. The panel is not responsive to any remote control commands or by the buttons on the panel itself (including power). The only way I've been able to (temporarily) fix this problem is by unplugging the power supply. I was able to watch a 1.5h movie (via component input) without this happening but otherwise it seems to be after at least an hour or more of viewing. Has this happened to anyone else? Any help?

By the way, I live at 7500 ft altitude but haven't had problems to this point (even the buzzing has been minimal).

acousticbiker

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