Panasonic TH-42PZ80U 2 blink

[ryan74]

Happy Holidays
when I first got this tv it was cold from the trip home when I powered it on and backlights dimmed and brightened repeatedly.
After that all I have got is the 2 blink error.

I was reading about the 2 blink sos troubleshoot and I checked for 15vdc at connector P7, pin1.
After pluging in and hearing relay click I get 1.393vdc.
About 15sec later I hear a relay and voltage drops but no blink code at this point.
When I hit power on, 1.3v flashes quick before shutdown and error code.

I also tried a resistance/short test but honestly I dont know if the results are ok on my dmm. It took 30 sec for it to show a stable 1.748kohm

Should there be 15vdc just after pluging in?

[tom66]

Re: Panasonic TH-42PZ80U 2 blink

2 blink fix:
https://www.youtube.com/watch?v=LjpGKaBt8hg

You do not need to replace the IC, only the capacitor.

[ryan74]

Re: Panasonic TH-42PZ80U 2 blink

I saw that video and read this thread, mainly post 10-20
https://www.badcaps.net/forum/showth...asonic+2+blink
I suspected caps but wasnt sure.

I think this should be a replacement but I have to verify first.
http://www.digikey.com/product-detai...179013?cur=USD

[tom66]

Re: Panasonic TH-42PZ80U 2 blink

Norcal used a 10uF 50V(?) SMD cap, you could also use a through hole one. The ceramic cap in this case appears to fail earlier than it should.

[DavidOH]

Re: Panasonic TH-42PZ80U 2 blink

This post will show you what some others have done.


https://www.badcaps.net/forum/showth...nic+th-50pz85u

[ryan74]

Re: Panasonic TH-42PZ80U 2 blink

Norcal used a 10uF 50V(?) SMD cap, you could also use a through hole one. The ceramic cap in this case appears to fail earlier than it should.

he used a 1uf 50v.
I assume other values dont matter?
I think it would be easier to use through hole or a smd like in video.

[ryan74]

Re: Panasonic TH-42PZ80U 2 blink

I was going to order
http://www.digikey.com/product-detai...179013?cur=USD

Will these work?
http://www.digikey.com/product-detai...2CT-ND/1985194

http://www.digikey.com/product-detai...3460-ND/949735

http://www.digikey.com/product-detai...285-ND/1972409
The Nichicon is smaller and would fit better.

a recomendation would be great. Maybe something like in pic

[ryan74]

Re: Panasonic TH-42PZ80U 2 blink

I ordered the surface mount ceramic cap. Hopfully I can solder something that small.
http://www.digikey.com/product-detai...179013?cur=USD

[DavidOH]

Re: Panasonic TH-42PZ80U 2 blink

The yellow on in the first pic is the one I did on 50PZ80U. It's a
1.0uf Tantalum Capacitor 35WVDC bought at Radio shack for about $2. The fix I did was on the MC301 for 10 blinks. I didn't do the MC201 even though some said you should do both. I've thought about opening it back up to do it. But it's been just over a year and the set is still working. So I figure heck with it. If it stops I'll worry about it then. Yes the soldiering is a challenge. I took the board off the PS to make it easier.

[ryan74]

Re: Panasonic TH-42PZ80U 2 blink

I got the caps today and want to make sure i get them in correctly.
http://www.digikey.com/product-detai...179013?cur=USD
There are no positive or negative markings on it that I can see but the video I watched said to put the negative side toward top of board.
how do I know what end is negative?

I also picked up a few 1uf 50v alum smd caps like in video as a backup/spare

[tom66]

Re: Panasonic TH-42PZ80U 2 blink

There is no polarity for a ceramic capacitor. Either way is fine.