Panasonic 65" VT20 10 blink code

[tw2005]

Re: Panasonic 65" VT20 10 blink code

Nothing in the V20 is compatible for VT20 except the Su board , power filter, the speakers and the stand

[infrag]

Re: Panasonic 65" VT20 10 blink code

I was thinking the bezel would be? Anyway I'd read what I wanted to read and thought I had 2 birds with 1 stone. The A board for the 65" and the Bezel for the 50" and if that didnt fix it swap parts from the 50" to make the V20 work...

Again sorry for reading it wrong. :0

[tw2005]

Re: Panasonic 65" VT20 10 blink code

I was thinking the bezel would be? Anyway I'd read what I wanted to read and thought I had 2 birds with 1 stone. The A board for the 65" and the Bezel for the 50" and if that didnt fix it swap parts from the 50" to make the V20 work...

Again sorry for reading it wrong. :0

Funny, I just gutted a smashed V20 and kept the chassis and bezel all because of your crazy problem.

[tw2005]

Re: Panasonic 65" VT20 10 blink code

i guess you don't have an eeprom programmer?

[infrag]

Re: Panasonic 65" VT20 10 blink code

Not unless I can use one of my arduino boards to program it?

How much for postage?

[infrag]

Re: Panasonic 65" VT20 10 blink code

Can you test on the bezel the resistance from the surface of the EMI strip to the frame its stuck to? Does the resistance change if you push harder on the surface of the EMI strip?

[tw2005]

Re: Panasonic 65" VT20 10 blink code

Not unless I can use one of my arduino boards to program it?

How much for postage?

Postage of what?

I'm thinking down the track a bit for the 65"

No manuals will make it hard but essentially if you think of the board as a processor then the only difference between any model is the firmware , data, program loaded on non volatile memory.

some of it is common. So either desolder and swapover or copy the data and overwrite the chips but you'd need a clip.

I've had some fun with a CH341 but the clips supplied are rubbish

[infrag]

Re: Panasonic 65" VT20 10 blink code

And now I'm back to trying to repair the A board on the 65". I've noticed that the voltage on what I believe is pin 10 & 11 on connector A3 kicks in but is not constant and varies from 1-3ish volts when I turn the TV on. Now I'll try the schematics to find where that comes from but reading them is not my strong point..

[tw2005]

Re: Panasonic 65" VT20 10 blink code

Can you test on the bezel the resistance from the surface of the EMI strip to the frame its stuck to? Does the resistance change if you push harder on the surface of the EMI strip?

not right now, maybe tomorrow evening plus it's screwed together. Time for some zzzzzzzzzzzzzzzz s

[infrag]

Re: Panasonic 65" VT20 10 blink code

Postage of what?

I'm thinking down the track a bit for the 65"

No manuals will make it hard but essentially if you think of the board as a processor then the only difference between any model is the firmware , data, program loaded on non volatile memory.

some of it is common. So either desolder and swapover or copy the data and overwrite the chips but you'd need a clip.

I've had some fun with a CH341 but the clips supplied are rubbish

I was joking about postage for the bezel you pulled off
I know its not worth it. Sorry I have lame humour.


Have you done the firmware/eeprom mod to lower your black levels on your TV's or is that not something you care about? The one where you erase the power on hours...

[infrag]

Re: Panasonic 65" VT20 10 blink code

Can the firmware not be erased and reprogrammed through the service port?

[tw2005]

Re: Panasonic 65" VT20 10 blink code

I was joking about postage for the bezel you pulled off
I know its not worth it. Sorry I have lame humour.


Have you done the firmware mod to lower your black levels on your TV's or is that not something you care about?

No , I'm not into mods, just plain old get it working and keeping it standard

[infrag]

Re: Panasonic 65" VT20 10 blink code

Hey would you be willing to help the guy on gumtree out fix his TV if he posts on this forum? I've told him he can probably fix it with some help from you awesome guys

edit: I've told him to post on this forum so hopefully he perseveres and can be helped out. The more TV's fixed the better I reckon.

[tw2005]

Re: Panasonic 65" VT20 10 blink code

Can the firmware not be erased and reprogrammed through the service port?

Which port? Never tried, don't have the knowledge or gear but would not surprise me but i don't know where you'll find the info for that.

[tw2005]

Re: Panasonic 65" VT20 10 blink code

Hey would you be willing to help the guy on gumtree out fix his TV if he posts on this forum? I've told him he can probably fix it with some help from you awesome guys

edit: I've told him to post on this forum so hopefully he perseveres and can be helped out. The more TV's fixed the better I reckon.

You can tell him I have some repaired SC boards I will sell for a fair price.

[infrag]

Re: Panasonic 65" VT20 10 blink code

Which port? Never tried, don't have the knowledge or gear but would not surprise me but i don't know where you'll find the info for that.

Its a socket I believe on the A board. You can use an arduino to interact with the EEprom and read and write to it. The thread calls it a service port. I havent done it so I didnt look too far into it.

This is the guide someone made if your interested in the information.

http://panasonic.mironto.sk/

[tw2005]

Re: Panasonic 65" VT20 10 blink code

Its a socket I believe on the A board. You can use an arduino to interact with the EEprom and read and write to it. The thread calls it a service port. I havent done it so I didnt look too far into it.

This is the guide someone made if your interested in the information.

http://panasonic.mironto.sk/

Sounds interesting, maybe you could try it yourself and contribute what you find.

I'd be interested in say clearing fault codes of adjusting the hours for exmple replacing A boards to match up with the original board but doing eeprom swaps carries the DNA of the old TV across anyway.

I guess people have gone a step further which is cool .

I have stumbled across a couple of 1 blink errors which traditionally people would just replace the Aboard but I got lucky with one reflashing the panel data eeprom.

It was incredible, just one character somehow got corrupted and changed, that killed the whole TV. Found it doing a comparison of a dump file.

I find they're pretty good anyway, but I don't sit in front f my Tellie wondering about my black levels.

[infrag]

Re: Panasonic 65" VT20 10 blink code

I've been comparing read outs of each board. The only difference found so far is a resistance value for Q4201.
I think its pin 6 to pin 3 gives a reading on the bad board of 34 ohms while the good board has 65 ohms.

The schematics I have are apparently wrong and doesnt have that chip in them. I guess I got a similar manual but not the right one.

[infrag]

Re: Panasonic 65" VT20 10 blink code

Quick upload of what I'm on about. Hope to add some other ones without flash tomorrow.

https://drive.google.com/open?id=0B-...k9wMmpWc0tBOGc

[infrag]

Re: Panasonic 65" VT20 10 blink code

not right now, maybe tomorrow evening plus it's screwed together. Time for some zzzzzzzzzzzzzzzz s

OK thanks for your time and help regardless!