panasonic tx42-p42x20b

[tom66]

Re: panasonic tx42-p42x20b

So 15V always dead? Not changing as TV turns on? Just need to confirm that.

[adamp91gvm]

Re: panasonic tx42-p42x20b

[adamp91gvm]

Re: panasonic tx42-p42x20b

no 15v is allways dead

[tom66]

Re: panasonic tx42-p42x20b

There is a fuse PA5610. It's not marked but I've highlighted it in the PCB print. See if you can locate it and check if it is open, also the voltages on both ends, red on each end and black going to chassis. Expecting ~15V if all is well with fuse. See attached.

[adamp91gvm]

Re: panasonic tx42-p42x20b

[vinceroger69]

Re: panasonic tx42-p42x20b

fuse is open circuit but whats caused it to blow a good spot tom some good fault finding tips in this thread

[tom66]

Re: panasonic tx42-p42x20b

Check from the ~0.4V end to chassis ground on ohms. Hold the reading for several seconds. Is it zero, or near zero?

[adamp91gvm]

Re: panasonic tx42-p42x20b

this is where u loose me :S

[tom66]

Re: panasonic tx42-p42x20b

OK, set your meter to the 2000 ohm range. It looks like this: 2000Ω. The "Ω" indicates ohms.

The TV should be off and unplugged.

Then put the red probe on the side of the fuse which is measuring low voltage (about 0.4V) and the black probe on the chassis. Record the reading you get, after letting it settle for five seconds.

If your meter shows a single "1", i.e. the same as not connecting the probes, this is "open circuit".

[adamp91gvm]

Re: panasonic tx42-p42x20b

it just says on 1

[adamp91gvm]

Re: panasonic tx42-p42x20b

if i put both to the chassis it goes to 0

[tom66]

Re: panasonic tx42-p42x20b

OK, so probing the FUSE to CHASSIS the multimeter reading doesn't change from the reading you'd have if you just don't touch the probes anywhere or on anything?

If so, the fuse could have randomly failed. You can replace it.

I can't find the rating of it, but it's stocked by Encompass for $1.08.
http://www.encompassparts.com/item/7...4022A0031/Fuse

What is printed on the device itself?

[adamp91gvm]

Re: panasonic tx42-p42x20b

there is a blue x on the fuse is there a way to bridge this for a few seconds to test if its gone?

[adamp91gvm]

Re: panasonic tx42-p42x20b

they dont ship for under $200 u think maplins might be able to get them

[tom66]

Re: panasonic tx42-p42x20b

I am making a guess here, but I think 4A/32V will work, I do not see this line exceeding 1~2A under normal operation. If your multimeter has a 10A fuse built in you can try using the 10A mode to measure power usage. Post a pic of your meter to confirm.

CPC stock fuse:
http://cpc.farnell.com/littelfuse/04...-4a/dp/FF01225
(pack of 10, keep some spares)

Free delivery on ANY order to UK.

Can you post a picture of that fuse to confirm dimensions? Make sure other components are visible so I can get a sense of scale. It's most likely 1206 type.

[adamp91gvm]

Re: panasonic tx42-p42x20b

ill order some now but if there is only 15v coming into the board from the ss could i not just solder it over ?

[tom66]

Re: panasonic tx42-p42x20b

No, you risk damaging wiring harnesses or other parts of the board. See above for both pic requests - DON'T order until dimensions confirmed!

[adamp91gvm]

Re: panasonic tx42-p42x20b

i just took a quick risk got a wire bent it in to a horse shoe shape and put it on both ends and turned it on and BOOM THE TV COME ON amazing thank you so much your a true gentleman !!!!! but it was only v quick and im ordering fuses now i know it was i risk but i had to try :s

[tom66]

Re: panasonic tx42-p42x20b

Uh, OK... Lucky you :P
Just make sure to install an actual fuse!

Since it works, the current it is drawing can be measured and a fuse can be sized.
Pic of meter please
and of fuse

[adamp91gvm]

Re: panasonic tx42-p42x20b

what so do the loop again turn it on and measure whats going through the loop ?