Lg42pq2000

[mitarrazor]

Hello everyone !
Well a have a LG42PQ2000-ZA I seend it to service they sad it can't be fixed,
so I decided to do it myself,when i removed the back cover and started to do the measurements gues what I have a few components missing.

On the power board is missing Q801 and Q906 the power board is a EAY59544701.Also from Z-Sus Q1 is missing and from Y-Sus Q22.

I have searched the entire internet for schematics but in those I found these components are not specified



I am very grateful to those who can help me in this issue!

Thank you !

[tom66]

Re: Lg42pq2000

I just fixed a 42PQ3000. There were a few omitted components, it is possible it never had these? Any sign of work being done on them? Solder marks, cleared holes, flux residue etc.?

[mitarrazor]

Re: Lg42pq2000

Before service tv was working but after some time will go off,after servicing it stays off all the time and on the boards is visible flux residue,its obiouvs there were components,I google it and seen some pictures of the PCB's the components should be there I just don't now what are the values.

Thank you very much !

[tom66]

Re: Lg42pq2000

Can you show a picture then of these parts?

[mitarrazor]

Re: Lg42pq2000

I will do some pictures on this afternoon and will post them .
Thank you for the interess .

[mitarrazor]

Re: Lg42pq2000

Well I arrived home and did the pictures ...I hope it will help.

[mitarrazor]

Re: Lg42pq2000

More detaliate picture.
You see more wrong placements or maybe more missing components ?
If you need more picturesc or details please let me know.

[tom66]

Re: Lg42pq2000

Unfortunately the boards are completely different from mine, so I'm unable to help you there .

[mitarrazor]

Re: Lg42pq2000

Thank you very much anyway ,I hope that in close future someoane will help me with this .
Thank you for yuo patience and good thought to help me .

[tom66]

Re: Lg42pq2000

I can at least suggest that the one missing FET on the heatsink of the power board should be identical to the other one, as part of the Vs/Va supply.

Note, you should always replace the driver IC and other parts if you replace the MOSFETs on the power supply otherwise, repeat failure is possible.

The other FET will be a small one, rated at least 400V and around 2 amps, it is for discharging Vs and Va after shut down.

[mitarrazor]

Re: Lg42pq2000

I have been told about older parts I have intention to replace them but can't stat work without knowing the missing parts name,if it was just a component missing it woudn''t bee so hard to identify but they all over missing is so frustrating.
I'm gonna search for the IC driver and see if I can find some applications with the MOSFETs