Lg 60pa6500 black spots on tv

[pansatdishman]

Re: Lg 60pa6500 black spots on tv

Thanks I used my multimeter I get weird readings on q302 , q202, and another one , is there something else I should test ? I know I should change those ones
Thanks

[Biruslapio]

Re: Lg 60pa6500 black spots on tv

What are those weird readings?

Anything below 500 ohms is a problem.

[pansatdishman]

Re: Lg 60pa6500 black spots on tv

There low and fluctuating alot compared to the others around 200 and fluctuates
Q302 auk b2c25 smk0825
Q282 auk b2c25 smk0825
Q281auk b2c25 smk0825
Where do I find them? And the other types on this are
Rkp30h2a 4p 026 and auk b3103 sf200400sd2
Thanks

[Biruslapio]

Re: Lg 60pa6500 black spots on tv

You got some part numbers wrong. For q302, q281 and q282 is SMK0825, an IGBT.

RJP30H2A is an IGBT, nothing comes up with RKP30.

SF20D400SD2 is a diode.

If they are suspect of being shorted, then they have be desoldered from the board and tested off-circuit.

[pansatdishman]

Re: Lg 60pa6500 black spots on tv

Heres pics of the 3 different components and the writing on them . Where can I get these? Thanks also is there something else i should check?
Thanks

[dick_barton]

Re: Lg 60pa6500 black spots on tv

You can check SF20D400SD2 as Biruslapio says since they are dual diode pack which your meter can test. Unfortunately the best way to test them is if they test short on the board to desolder them and test again.

[pansatdishman]

Re: Lg 60pa6500 black spots on tv

Thanks if I desolder it I'm just going to change all of them as theres only a few, with new ones, where can I find these ? Do I just search for smk0825 , RJP30H2A and SF20D400SD2 ?

[petehall347]

Re: Lg 60pa6500 black spots on tv

you can just desolder the legs and lift them up a bit .

[RJARRRPCGP]

Re: Lg 60pa6500 black spots on tv

Here's the z sustain board , does it look like theres anything wrong thanks in advance

I see 2012, week 50!

[pansatdishman]

Re: Lg 60pa6500 black spots on tv

Okay so I was able to find a parts tv. Bit I'd like to fix both. So I know what's wrong g with the one I got today the main board had the hdmi component ripped off. I tried swapping a sustain boards and it did the exact same thing. So it's not the z sustain, power supply or?

[Biruslapio]

Re: Lg 60pa6500 black spots on tv

Test the buffer boards for short-circuit on the output pins.
It takes some seconds for the screen to fully recover from these black spots when the sustain issue is solved.

The other tv you bought works fine except for the HDMI?

[pansatdishman]

Re: Lg 60pa6500 black spots on tv

Okay so I swapped all the boards the issue for the black hazr was the y sustain board. The tv I bought yesterday all that's wrong with it is the hdmi port was broke off the tv so the tv wont power on. So right now I have a working tv, and a y sustain board and a main board with the hdmi port broke off

[pansatdishman]

Re: Lg 60pa6500 black spots on tv

Heres the y sustain board, this looks like the issue causing the black haze?

[pansatdishman]

Re: Lg 60pa6500 black spots on tv

Heres the control board with the broke off hdmi board with this board the tv wont power on

[Biruslapio]

Re: Lg 60pa6500 black spots on tv

Heres the y sustain board, this looks like the issue causing the black haze?

I woundn't have guessed it just by the photos, certainly looked like a Z-SUS fault.

I see no problems in the picture, only that it has a dot that has been resoldered, that brown stuff is flux, either at the factory or someone else touched only that spot.

If you want to fix the Y sustain follow the same procedures that I pointed at #16 and measure the main voltages it produces, -VY and VSC.

[pansatdishman]

Re: Lg 60pa6500 black spots on tv

For the main board should I just get another hdmi port and which one am I looking for thanks

[mmartell]

Re: Lg 60pa6500 black spots on tv

If you see any shorts where the hdmi port came off run your iron over them to remove them. The board will still work fine without the port there provided the cpu isn't seeing a short.

[pansatdishman]

Re: Lg 60pa6500 black spots on tv

Yeah the board isn't working without the hdmi, and I see the board is missing one trace for it

[vinceroger69]

Re: Lg 60pa6500 black spots on tv

The main board should work with the hdmi port removed can you upload a picture of the missing trace area

[pansatdishman]

Re: Lg 60pa6500 black spots on tv

Here