Panasonic TH-42PZ81 - 10 Blink / Flash

[noledud]

Hi All

Got a TH-42PZ81 been on the look for a while but never had one

Looking at lots of other posts it does look like the TEA1611T on 201 and 301

However i would like to triple check

Is there any indicators that this is the "normal" 10 blink error ?

Also where is the best place for the bits ?

[tom66]

Re: Panasonic TH-42PZ81 - 10 Blink / Flash

Give that area a blast of freeze spray - normally it'll kick it into life for about 10 minutes or until you turn it off.
Sometimes it is the IC, but most times, it's only the adjacent capacitor.

[tom66]

Re: Panasonic TH-42PZ81 - 10 Blink / Flash

See here:
https://www.youtube.com/watch?v=LjpGKaBt8hg

[noledud]

Re: Panasonic TH-42PZ81 - 10 Blink / Flash

cool need to grab a can of air then only got switch cleaner lol

[tom66]

Re: Panasonic TH-42PZ81 - 10 Blink / Flash

Poundland sell such cans for £1 each for 200ml, works great, much cheaper than eBay.

[noledud]

Re: Panasonic TH-42PZ81 - 10 Blink / Flash

brilliant top tip mate will be there tomoz

[tw2005]

Re: Panasonic TH-42PZ81 - 10 Blink / Flash

Just did my PZ800 for 2 blink. Replaced the tiny ceramic cap and came good straight away.

[noledud]

Re: Panasonic TH-42PZ81 - 10 Blink / Flash

iv got my compressed air but i cant get it to come on

iv followed the video and mine dosnt have the 10 flash until iv pushed the power button

then the tv does 2 quick clicks and then a pause 2 - 3seconds then the 3rd click and then flashes 10 times

the tv is really really dusty so im going to clean up and re-seat all connectors

while im doing that can you guys suggest what i can check next ?

[noledud]

Re: Panasonic TH-42PZ81 - 10 Blink / Flash

iv tried all connections and still no joy, how do i go about testing each board ?

[tom66]

Re: Panasonic TH-42PZ81 - 10 Blink / Flash

It's more likely you have a 10 blinks after power button fault then, this is possibly main board related. You should check all the power supplies on the main board such as the SUB5V and SUB9V. Also check if Vsus rises briefly.

[noledud]

Re: Panasonic TH-42PZ81 - 10 Blink / Flash

hi tom and all replaced the mainboard - tv powers on now and i see the screen charge - however i cant get anything to display its just black

[noledud]

Re: Panasonic TH-42PZ81 - 10 Blink / Flash

also no fans come on so i dont think its powering up right

[tom66]

Re: Panasonic TH-42PZ81 - 10 Blink / Flash

None of my 10 blinkers ever fired up the fans. If the sustain LEDs are lit up (SC/SS) I'd suspect a bad mainboard. I guess you had a bad one originally and your replacement isn't working right. Of course check all connectors etc are fully seated. Try checking the 1.2V & 1.8V supplies for the CPU, if they are missing, you will get this effect, which will confirm bad main board.

[noledud]

Re: Panasonic TH-42PZ81 - 10 Blink / Flash

i have noticed some empty sockets do you think someone has been inside this befor or are they ment to be no wires in these connections

[noledud]

Re: Panasonic TH-42PZ81 - 10 Blink / Flash

hi tom thanks - i have both LED's lit

can you show me where these test points are please ?

[noledud]

Re: Panasonic TH-42PZ81 - 10 Blink / Flash

also i only get the 2 clicks when i power on and not the 3 i expected

[tom66]

Re: Panasonic TH-42PZ81 - 10 Blink / Flash

All those are debugging/factory use sockets, that's fine.

Two clicks should be very quickly followed by a third click for a SOS10 on PSU. However if you have an SOS10 due to main board that might not occur. Note when the TV is working you should only hear two clicks. All my PZ80s do this. I've a 46PZ82 I'm working on right now, can do a few brief checks if you like.

Do you have the schematic for the A board, I will highlight them.

[noledud]

Re: Panasonic TH-42PZ81 - 10 Blink / Flash

i dont have the schematics no the seller does have another one so would like to confirm it is bad before proceeding to get it swapped

i dodnt get any SOS it just powers as if it should be working

now dont call me daft but this is first working (well sort of ) panasonic you dont need any inputs connected >? i thought i would still get a picture and menu etc

[tom66]

Re: Panasonic TH-42PZ81 - 10 Blink / Flash

You will get an input indicator in top left corner, but otherwise blank until you press a button like the menu button.

Full picture of the A board and I'll take a stab at guessing location, could be wrong but worth a shot. Can't find any manual for PZ81. The main board is different because of Freesat support, but all other boards are more or less identical.

[noledud]

Re: Panasonic TH-42PZ81 - 10 Blink / Flash

thanks tom here it is