LG 50PK550 clicking - plasma newbie

[budm]

Re: LG 50PK550 clicking - plasma newbie

No need to do anything now just make sure the female end is seated properly and then do the resistance test, use 200 Ohms scale.

[jason424]

Re: LG 50PK550 clicking - plasma newbie

Check the resistance between the LINE (HOT) prong of the AC male plug and the red connector with Brown wire, see what you get, then check the resistance between the Neutral prong of the AC plug and the red connector with the blue wire to see what you get.
That female end of the power cord does not look like it is inserted all the way in.

I get .4 for resistance on the Hot/Brown. And I get .7 for the Neutral/blue.

[vinceroger69]

Re: LG 50PK550 clicking - plasma newbie

when you touch both your multi meter leads together on 200 ohms whats you meter read?

[jason424]

Re: LG 50PK550 clicking - plasma newbie

00.3 not sure why it's not at 0.00 any more...meter bad? Is there a way to zero it?

[vinceroger69]

Re: LG 50PK550 clicking - plasma newbie

no not bad thats about what mine reads have you tested another item in the wall outlet to make sure its ok and works as i have no idea now why you have no mains voltage to that connector on the pcb hopefully budm can advise further
also have you got another item you can check your meter works on ac mode and reads 120v or whatever your voltage usually is be carefull though as mains voltage

[budm]

Re: LG 50PK550 clicking - plasma newbie

So the wiring is good all the way one end of AC male plugs to the connector end of the circuit board, but yet no 120Vac present at the Brown and Blue wire's ends.
So you are sure that
1) you do have 120vac at the outlet.
2) you are making good contact with the two legs of the red incoming AC connector.
3) operator error.

[vinceroger69]

Re: LG 50PK550 clicking - plasma newbie

thanks budm im still learing but was trying to go by step by step how i would trace this fault myself its just explaining things/terms to use i still get stuck with.

[jason424]

Re: LG 50PK550 clicking - plasma newbie

It was operator error, more so meter error. I went to test my outlet and my meter wouldn't turn on. I went out and got my better meter (GDT-11) and the red connector tests 125.5 volts at the red connector/brown and blue wires.

I apologize for the goose chase with my junk/cheap meter.

[budm]

Re: LG 50PK550 clicking - plasma newbie

So all the power cord ends, red connector, and AC male plugged in properly and you do have 120VAC at the AC wall outlet, meter set to 200VAC and you put one of your meter probe at L, another one at N, the meter shows 0 VAC, correct?
Notes: we already verified that the resistance between the L on the red connector and AC plug L has < 1 Ohm, same for N on the red connector and the AC plug.

[jason424]

Re: LG 50PK550 clicking - plasma newbie

No now with one on L and the other on N,I have 125.5.

[vinceroger69]

Re: LG 50PK550 clicking - plasma newbie

now you have ac power to the set check what dc voltages you have on the connector in post 66

[budm]

Re: LG 50PK550 clicking - plasma newbie

Never mind, test equipment error.

[jason424]

Re: LG 50PK550 clicking - plasma newbie

I've unplugged the connector that leads to the video board and tested the 18 pins (stacked 9+9) of the female connector on the board and don't get any voltage to any of them.

[vinceroger69]

Re: LG 50PK550 clicking - plasma newbie

ti think it was just his faulty meter budm now hes swopped too a new one maybe he will have some dc readings too as he didnt even have 5v stby not sure if you have read the whole thread budm but he fitted a new ic and when i asked him to clean the board one pad was lifted hence the red wire to join the tracks since then board seems dead no lights no clicking etc

[vinceroger69]

Re: LG 50PK550 clicking - plasma newbie

I've unplugged the connector that leads to the video board and tested the 18 pins (stacked 9+9) of the female connector on the board and don't get any voltage to any of them.

is your neter on dc volts black probe on tv metal chassis?

[jason424]

Re: LG 50PK550 clicking - plasma newbie

Yes set at 200. I get nothing, except when I get to the 4th pin on the bottom instead of just "0.00" I get "-0.00" so the negative symbol (-) comes up. Looks like that pin is marked as "ERROR DET"

[vinceroger69]

Re: LG 50PK550 clicking - plasma newbie

when your testing these voltages are all the boards connected if not try measuring again with alll connecting wires etc in place

[jason424]

Re: LG 50PK550 clicking - plasma newbie

Power cord is plugged in to an outlet and all cables are connected except the one at that connector I'm testing.

[vinceroger69]

Re: LG 50PK550 clicking - plasma newbie

thats the one i mean plug it back in and maybe carefully touch the pins on the connector itself i dont know if the main board needs to be connected to get voltages etc. Hopefully reece or budm may advise us more regarding all the missing dc voltages

[jason424]

Re: LG 50PK550 clicking - plasma newbie

I plugged that cable in and still get 0.00 across all pins (pic) with black on metal chassis.

And I do still have 125 volts at the red connector