Panasonic P50G20E

[tw2005]

Re: Panasonic P50G20E

Cant fool it with a resistor....

Fan has tacho-generator that supplies mainboard with square-wave depending on speed. no square-wave, it shuts down....

you just find the point in the board that turns to high, earth it or open it up. I had to use a G10 board in a S10 because nothing else was around. That how I sorted the missing fans.

[tw2005]

Re: Panasonic P50G20E

So just using the G20E 42 & 50 for some clues what eeproms are the same.

42G20E

IC1101 TVRR326

IC4205 TVRR333

IC8921 TVRR329

IC8950 TVRR320

IC9304 TVRR330

50G20E

IC1101 TVRR328

IC4205 TVRR333

IC8921 TVRR329

IC8950 TVRR320

IC9304 TVRR330

So it would appear if you got lucky and found a 42G20E A board, just 1 IC swap.

I can't tell you the best way from here but it would appear looking at he images the Shopjimmy 42 & 50G20B A-boards are physically the same so should be a good basis to convert from.

In the image of the 42G20B, IC8921 is labelled 329 and using the same logic with what we see in the 42 & 50 E region boards IC9304 is the same so safe to assume that's the case there too.

this would mean if you got the 42G20B, leaves potentialy only 3 eeproms to do.

What bugs me is why does the 50" show 921 on ic8921? A little unusual as that is the software and would be the same across the same spec models all G20 series.

That's what I generally see.

So a part of me thinks maybe the 50" board could simply work in your region as it is and a part of me suggests getting the 42G20B which would make the solder work easier leaving just 3 chips.

Note 4 of the 5 are on the back(easy)

1 is under that large card slot ( could be a problem)

the images are of the 42" SHopjimmy board showing the eeproms and an image of what i believe yours is.


I can say this from experience. If the boards are electrically the same and all the eeproms are swapped over then the donor board will turn into your old board with all it's settings and hours, fault history intact

[tw2005]

Re: Panasonic P50G20E

So just using the G20E 42 & 50 for some clues what eeproms are the same.

42G20E

IC1101 TVRR326

IC4205 TVRR333

IC8921 TVRR329

IC8950 TVRR320

IC9304 TVRR330

50G20E

IC1101 TVRR328

IC4205 TVRR333

IC8921 TVRR329

IC8950 TVRR320

IC9304 TVRR330

So it would appear if you got lucky and found a 42G20E A board, just 1 IC swap.

I can't tell you the best way from here but it would appear looking at he images the Shopjimmy 42 & 50G20B A-boards are physically the same so should be a good basis to convert from.

In the image of the 42G20B, IC8921 is labelled 329 and using the same logic with what we see in the 42 & 50 E region boards IC9304 is the same so safe to assume that's the case there too.

this would mean if you got the 42G20B, leaves potentialy only 3 eeproms to do.

What bugs me is why does the 50" show 921 on ic8921? A little unusual as that is the software and would be the same across the same spec models all G20 series.

That's what I generally see.

So a part of me thinks maybe the 50" board could simply work in your region as it is and a part of me suggests getting the 42G20B which would make the solder work easier leaving just 3 chips.

Note 4 of the 5 are on the back(easy)

1 is under that large card slot ( could be a problem)

the images are of the 42" SHopjimmy board showing the eeproms and an image of what i believe yours is.


I can say this from experience. If the boards are electrically the same and all the eeproms are swapped over then the donor board will turn into your old board with all it's settings and hours, fault history intact

So I just got a hand on this one from Kilroys. The service manual for the TX-P50G20B says this for the chips.

IC1101 TVRR328

IC4205 TVRR333

IC8921 TVRR329

IC8950 TVRR321

IC9304 TVRR330


So based on that I'm tempted to ignore what's showing on that label in Shopjimmy, could be a stuff up and the 921 refers to the location 8921? seems a coincidence but the manual at leasts suggests what I've seen in the past and that is IC8921 would be the same across the G series in that region.

Roll the dice, pick a board but one 8 pin eeprom swapped and I think you could be in business.

If you want to keep the hours right etc I'm not sure which chip it will be stored, a problem for later I guess

[bluebear]

Re: Panasonic P50G20E

@tw2005
Wow, thanks. Would be an interesting task. You have done some serious digging in the matter.
I´ll see what comes up in regards to the boards. At the moment it works
kind of all the time. When it starts scrolling a simple restart at the unit fixes it and usually works for hours, 1 restart yesterday. The backpanel is restricting air flow due to the small holes. Could be if opened completely it would not restart at all.

[tw2005]

Re: Panasonic P50G20E

@tw2005
Wow, thanks. Would be an interesting task. You have done some serious digging in the matter.
I´ll see what comes up in regards to the boards. At the moment it works
kind of all the time. When it starts scrolling a simple restart at the unit fixes it and usually works for hours, 1 restart yesterday. The backpanel is restricting air flow due to the small holes. Could be if opened completely it would not restart at all.

I would say it will eventually die. And boards are not always easy to find and that SJ price is about $100 USD less than you'd expect for a used board.

If it was my set and planned on keepng it, I'd bank a board for a rainy day.

In fact that 's what i have done for min eover the years. Accumalated evry board spare plus 2 mains, 5 sc,sd,su sets which it's not looking like I'l be needing.

The shitty thing is I never regarded speakers as perishable. They are, mine fell apart, lucky had one set of speakers but should have had at least 2 sets more but never grabbed them.

[bluebear]

Re: Panasonic P50G20E

Yeah, you are right. I will see what i can find.

[bluebear]

Re: Panasonic P50G20E

@tw2005
I jumped on a similar board for the P50gw20,
for a reasonable price. Could not find much info but seems to be very close to mine. Often also referred to as p50gw20e. The difference is, I hope, that it has a secondery dvb-s board. I have an external dvb reciever anyways, only need hdmi. I Will post when its due. Thanks for the help so far.

[bluebear]

Re: Panasonic P50G20E

The new board finally arrived, installed it this morning and works great.
I used a board from a P50GW20. Thanks tw2005 for all help.

[tw2005]

Re: Panasonic P50G20E

The new board finally arrived, installed it this morning and works great.
I used a board from a P50GW20. Thanks tw2005 for all help.

Sure, no worries mate.

[Motsey]

Re: Panasonic P50G20E

So I just got a hand on this one from Kilroys. The service manual for the TX-P50G20B says this for the chips........

HI, have a TX-P50G20B with 8 blinks and was wondering if you could guide me to the service manual you were looking at please?
I thought my issue was the SS board but once replaced it still blinks 8 times. However when i remove the SS33 cable of the SS board the Tv blinks 6 times. I think the issue may be the A board and am about to purchase one but would to have a read of the manual to investigate further.
I really hope it is not a filed Panel, out of interest is there a way to text to see if the panel is good before spending money on boards?

Thank you

[tw2005]

Re: Panasonic P50G20E

HI, have a TX-P50G20B with 8 blinks and was wondering if you could guide me to the service manual you were looking at please?
I thought my issue was the SS board but once replaced it still blinks 8 times. However when i remove the SS33 cable of the SS board the Tv blinks 6 times. I think the issue may be the A board and am about to purchase one but would to have a read of the manual to investigate further.
I really hope it is not a filed Panel, out of interest is there a way to text to see if the panel is good before spending money on boards?

Thank you

Sure and since you've just joined, if you need to do more on this when your account is activated, start a separate thread for Panasonic TX-P50G20B - 8 blinks.

have you used search yet to see if there is any history?

Don't get many 8 blinks, can't remember if I've read more than one on this series.

There should be some results tables for results expected with different boards and cables removed in that guide

It does say disconnect ss33 if it still shuts downs check ss, c2 board and A-board connections if good , A-board,

Have a good look at those white ribbons just in case there is corrosion, I had a HD 2010 model give me 8 blinks due to corroded ribbons.

You can disconnect sc2, ss11, p35, and the 3 white ribbons to turn the TV on and see if it errors. It should turn on . If you do this, don't reconnect sc2,ss11 and important not P35 for a good 5-10 mins due to voltage still stored, or get a meter and check those first . Spike p35 and can fry the panel ribbon ICs.

[Motsey]

Re: Panasonic P50G20E

You can disconnect sc2, ss11, p35, and the 3 white ribbons to turn the TV on and see if it errors. It should turn on.

Hi tw2005, thank you for you response.

When i removed all the above cables the tv did turn on, well the green light came on but the screen was black.

Do you think this now excludes the A board as being the problem? I have replaced the SS board to one i believe is good, so based on the guides you attached most likely failed is 1 SS board, 2 A board and 3 panel! I hope it is not the panel!

Once this has discharged i will have a good look at the cables before plugging them back in.