panasonic TX-P42X20B flashing red

[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

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

[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 ?

[tom66]

Re: panasonic TX-P42X20B flashing red

Yes. Forgot about those.

[karlpowell]

Re: panasonic TX-P42X20B flashing red

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

[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

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

[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

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

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

[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

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

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

[tom66]

Re: panasonic TX-P42X20B flashing red

Do you have three?

[karlpowell]

Re: panasonic TX-P42X20B flashing red

OK , i have a 200 ohm here

[tom66]

Re: panasonic TX-P42X20B flashing red

Any value from 100 to 470 ohm is fine.

[karlpowell]

Re: panasonic TX-P42X20B flashing red

Yes, Please give me the exact values and how many i need and ill pick them up in the morning .

[tom66]

Re: panasonic TX-P42X20B flashing red

We can prove that the P board is working. You will need to get hold of some 100 to 470 ohm resistors. Can you get those...?

[karlpowell]

Re: panasonic TX-P42X20B flashing red

so would an A board swap fix this or could this still be a P board fault

[tom66]

Re: panasonic TX-P42X20B flashing red

pin11 (all off) = 0v
pin7 (panel main on) = 0v
pin5 (tv sub on) = 0v

OK, so for some reason the A board isn't telling the P board to turn on...