Panasonic TC-P50U50 8 blinks SS board fixed.

[capwizard]

Yes this is old thread: Thanks to Sevenqi, gave us so detailed description.

Panasonic Plasma TC-P50U50 8 blinks SS board fix
http://mobile.badcaps.net/forum/showthread.php?t=39625

I want to add two more Tips: You always can sub the parts with better rating one, same as capacitors, Q16051 (DG302), 330V IGBT. I sub with DG502, 500V IGBT, same as DG402. The next tips is the other side of screws need to change the one with washer on it.

PS: thermal paste I use this https://www.badcaps.net/forum/showthread.php?t=59177 #9 WHY! I use grease Because it never become hardened.


DG302
http://www.datasheetcafe.com/dg3c302...00v-250a-igbt/

[ReeceyBurger123]

Re: Panasonic TC-P50U50 8 blinks SS board fixed.

Good fix but you added any thermal paste to the new parts ?

[keeney123]

Re: Panasonic TC-P50U50 8 blinks SS board fixed.

I think you should contact the manufacturer of the grease you use to see if it conducts heat and if it has a high resistance. The information I have attached does not show it conducts heat. If fact it may insulate from heat. It also does not show it's electrical resistance. As far as WD40 only the makers of it really know the chemicals in it. I would not use it in electronic circuits of low voltage and low current. In high voltage and high current circuits it may not matter as a little resistance or contaminants will not matter as much.

[ReeceyBurger123]

Re: Panasonic TC-P50U50 8 blinks SS board fixed.

I think you should contact the manufacturer of the grease you use to see if it conducts heat and if it has a high resistance. The information I have attached does not show it conducts heat. If fact it may insulate from heat. It also does not show it's electrical resistance.

+1 them parts get hot as well !

[capwizard]

Re: Panasonic TC-P50U50 8 blinks SS board fixed.

But..but..I already had used for 20 years, none of redo, the problem of the white thermal paste always dry out, better use none, it stop dispatch the heat, every time I scrub white paste out, it dried and harden as drywall, . the non-melting, Thermo Guard Grease, I used, the company already out of business, do conducts heat is for transmission and gear box high temperature application.


For keeney123, My bad, we should use more low end white thermal paste, the more return customers.

[capwizard]

Re: Panasonic TC-P50U50 8 blinks SS board fixed.

Q16051 is a IGBT switch for plasma panel..WHY, use IGBT, because its high voltage and high current capacity. .


PS: R16051 (5.6 Ohm resistor) can use any 2 to 20 Ohm is a gate driver current protector. can I shorted or bypass it. YES, you can and the TV will work, but next time burn out again you will need to change the 8 pins driver IC, that will be C0ZBZ0001920 = BD8694 = IC152

panasonic tc-p50u50 chassis service manual

[keeney123]

Re: Panasonic TC-P50U50 8 blinks SS board fixed.

But..but..I already had used for 20 years, none of redo, the problem of the white thermal paste always dry out, better use none, it stop dispatch the heat, every time I scrub white paste out, it dried and harden as drywall, . the non-melting, Thermo Guard Grease, I used, the company already out of business, do conducts heat is for transmission and gear box high temperature application.


For keeney123, My bad, we should use more low end white thermal paste, the more return customers.

So what is wrong with this http://www.universal-science.com/the...hermal-grease/

The purpose of transmission and gear box grease is so the parts do not rub together dry with friction. It is not used to sink heat out to a metal heat sink. Inj gears one does not want the grease to thin out with high temperature allowing gears to rub on each other creating higher temperatures by causing more friction. This is a thermal grease because it does not break down at high temperatures. I recommended that you contact the manufacturer to see if it had the quality of transferring the heat through it to a metal heat sink which is another type of application then what it was intended for.

[keeney123]

Re: Panasonic TC-P50U50 8 blinks SS board fixed.

Q16051 is a IGBT switch for plasma panel..WHY, use IGBT, because its high voltage and high current capacity. .


PS: R16051 (5.6 Ohm resistor) can use any 2 to 20 Ohm is a gate driver current protector. can I shorted or bypass it. YES, you can and the TV will work, but next time burn out again you will need to change the 8 pins driver IC, that will be C0ZBZ0001920 = BD8694 = IC152

panasonic tc-p50u50 chassis service manual

So what are you trying to tell us with the 5.6 ohm resistor?

[capwizard]

Re: Panasonic TC-P50U50 8 blinks SS board fixed.

I thought about use Silicon grease, at that time I can't afford, now less and less TV parts really need it, because of the SMD technology,high efficiency power supply, parts mount right on the PCB, now I used on my pools o ring and gasket.

look this guy, almost same as me..
Having used Vaseline on aquarium filter parts once I'd NEVER EVER use it on pool parts. Every rubber O ring or gasket I used Vaseline on got hard. Silicone left the same parts in great condition but was not really able to recondition the parts that I had messed up with Vaseline.

UniGrease 800: silicon based thermally conductive one part grease. The compound is ideal for use in a wide variety of electronic and electrical applications....

[capwizard]

Re: Panasonic TC-P50U50 8 blinks SS board fixed.

replace with thin copper wire. If you cant find the part.

[keeney123]

Re: Panasonic TC-P50U50 8 blinks SS board fixed.

I thought about use Silicon grease, at that time I can't afford, now less and less TV parts really need it, because of the SMD technology,high efficiency power supply, parts mount right on the PCB, now I used on my pools o ring and gasket.

look this guy, almost same as me..
Having used Vaseline on aquarium filter parts once I'd NEVER EVER use it on pool parts. Every rubber O ring or gasket I used Vaseline on got hard. Silicone left the same parts in great condition but was not really able to recondition the parts that I had messed up with Vaseline.

UniGrease 800: silicon based thermally conductive one part grease. The compound is ideal for use in a wide variety of electronic and electrical applications....

So there was other unigrease if you read down that are not silicon.. It depends on the application. This is just one example. I am sure other manufacturers offer similar products. I am sure cost varies depending on who you buy it from and what manufacturer is selling the product.

[keeney123]

Re: Panasonic TC-P50U50 8 blinks SS board fixed.

replace with thin copper wire. If you cant find the part.

Nothing wrong with repairing traces with copper wire of equal cross sectional area. Resistors are designed by electrical engineers to limit the current. Engineers usually use a +40% tolerance on electrical/electronic parts for safety.

[nobbnobb1]

Re: Panasonic TC-P50U50 8 blinks SS board fixed.

Hi guys, I'm trying to diagnose the same 8 blink issue. The TV does initially stay on for a few minutes before it trips. I tested the diodes (RF2001) and the MOSFETs (DG302), they all seem to test fine via the multimeter. They also stay relatively cool (<40C).

Is there still any point in changing out the parts? Or is this a failure on the SS board elsewhere?