panasonic TX-P42X20B flashing red

[karlpowell]

Re: panasonic TX-P42X20B flashing red

let me know what to do and ill have all three in the morning

[tom66]

Re: panasonic TX-P42X20B flashing red

You need to wire them from STBY 5V to the power on signals: PANEL MAIN ON, TV SUB ON. And one from POWER OFF to 0V (GND). The rails should switch on.

[karlpowell]

Re: panasonic TX-P42X20B flashing red

cool , i will do this tomorrow and get back to you

[tom66]

Re: panasonic TX-P42X20B flashing red

Oh, and the connector should be disconnected from the A board before doing this.

[karlpowell]

Re: panasonic TX-P42X20B flashing red

OK , just to double check i have this 100% correct before i attack it the with 200 ohm resistors.




on P7
stnby 5v(pin 8) to panel main on (pin 7)

stnby 5v(pin8) to TV sub on (pin5)

all off (pin11) to GND 0v .. where is the best place to pick up 0v GND ?

You need to wire them from STBY 5V to the power on signals: PANEL MAIN ON, TV SUB ON. And one from POWER OFF to 0V (GND). The rails should switch on.

[tom66]

Re: panasonic TX-P42X20B flashing red

GND would have to go to a screw or the chassis -- for now leave it off and see if it works without.

[karlpowell]

Re: panasonic TX-P42X20B flashing red

it didnt work without the ground, to all off , ill add this and try again this afternoon

[karlpowell]

Re: panasonic TX-P42X20B flashing red

0volts on all pins on P6

P7 has changed and is now as below

pin1 (standby 5v) = 0v
pin3 (s0) = 0v
pin4 (s1) = 0v
pin7 (panel main on) = +5v
pin5 (tv sub on) = +5v
pin11 (all off) = 0v
pin8 (stb-5v 0n) = +5v
pin9 (sos p4) = 0v
pin12 (main-sw) = +5v
pin14 (main sw) = 0v

[karlpowell]

Re: panasonic TX-P42X20B flashing red

Should pin 14(main switch 1) and pin 12 (main switch2) not be conected as well ?

[tom66]

Re: panasonic TX-P42X20B flashing red

Yes. Forgot about those.

[karlpowell]

Re: panasonic TX-P42X20B flashing red

do i need to put the 200 ohm resistor between pin 14(main switch 1) and pin 12 (main switch2) as well ?

[karlpowell]

Re: panasonic TX-P42X20B flashing red

I need a little help confirming i have put 5v to the right places Tom .. HAVE I GOT THIS CORRECT ?


As you can see i have wires
pin1 (stby5v) to pin7 (panelmain on) with 200 ohm resistor
pin1 (stby5v) to pin5 (TV sub on) with 200 ohm resisitor
pin11(all_off) to GND with a 200 ohm resistor
pin12 and pin14 (main switch 1 and 2) short out

You need to wire them from STBY 5V to the power on signals: PANEL MAIN ON, TV SUB ON. And one from POWER OFF to 0V (GND). The rails should switch on.

I still hear the relay click over then click back and the P board looks to behave the same way as without the resistors in place and the only change in voltages are the now 5V on pin5 and pin7 we have conected to 5V stnby

[tom66]

Re: panasonic TX-P42X20B flashing red

That looks correct.
You should get sound +15.8V, do you?

[karlpowell]

Re: panasonic TX-P42X20B flashing red

NO I dont, Here is what i get on P6 with the above in place..

pin1 (sound +15v) = 0v
pin2 (sound +15v) = 0v
pin3 (p+15v) = 0v
pin7 (F+15v) = +15.8v
pin9 (F+15v) = +15.8v

This is the same as before the resisitors where put in place.

[tom66]

Re: panasonic TX-P42X20B flashing red

OK. P board is definitely looking bad. Final check. Unplug PSU, wait 30 seconds, plug it in. Do you get some clicks from the relay?

[karlpowell]

Re: panasonic TX-P42X20B flashing red

yes we do , i hear it click then a second click after about 3 seconds , OK i have ordered a new P board , should be here early next week

[karlpowell]

Re: panasonic TX-P42X20B flashing red

Aaaaaaaarrrr Damn it ... power supply swapped and still 10 red flashes looks like ill need to source a A board .

[tom66]

Re: panasonic TX-P42X20B flashing red

Darn. Did the supplier you ordered from offer a returns policy?

[karlpowell]

Re: panasonic TX-P42X20B flashing red

no i got it from ebay .... i can re sell it on ebay so im not bothered

[craig417]

Re: panasonic TX-P42X20B flashing red

Any one know what might need changed on the a board to repair it or where to get the data from a 42" a board to change it on my 37" a board.
Or even how to change the resolution to enable full picture.