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Equipment Repairs => LCD TV forum => Topic started by: WILLYAM1 on June 27, 2009,01:37:52

Title: lcd graetz(beko)
Post by: WILLYAM1 on June 27, 2009,01:37:52

hi everyone.
i have lcd graetz model .
nr gr 30cwlb9 beko chasis L6B.
PROBLEM IS POWER ON LED GREEN IS LIGHT BACK LIGHT IS ON FOR 2 SEC AND THEN OFF.
IS ANYONE HAS THE SAME PROBLEM (PSU IS OK 12V 24V 3.3V OK).
INVERTER BOARD???.
WILLYAM1

Title: Re: lcd graetz(beko)
Post by: mulja on June 27, 2009,05:35:19

Yes inverter board
one of transformers faulty

check resistance between pin 1 and 8, 4 and 5 al of transformers
to find faulty one.

Good luck

Title: Re: lcd graetz(beko)
Post by: WILLYAM1 on June 28, 2009,14:16:45

mulja thanks for repyling me i will check your advice and get back to you.
 if one of the transformer is bad were can i get it???.
willyam1.

Title: Re: lcd graetz(beko)
Post by: WILLYAM1 on June 28, 2009,14:38:58

hi again dose anyone has schamatic diagram for inverter board made by DARFON modelV144-001.
IT FOR LCD BEKO CHASIS L6B.
WILLYAM1

Title: Re: lcd graetz(beko)
Post by: lubos55 on June 28, 2009,15:28:59

Quote from: WILLYAM1 on June 28, 2009,14:38:58

hi again dose anyone has schamatic diagram for inverter board made by DARFON modelV144-001.
IT FOR LCD BEKO CHASIS L6B.
WILLYAM1

Hi,the inverter board is not described in service manual L6B.It is policy of producers.

Title: Re: lcd graetz(beko)
Post by: WILLYAM1 on June 29, 2009,06:33:10

thanks to mulja and lubos55 for reply.
i checked transformes resistence.
7 transfo resistance are the same resis between pin 1 to 8(980 ohom).
resis pin 4-5(970 ohom).
1transf resis pin 1-8(980 ohm)and pin 4-5 (1350 OHM).
 I'Mnot sure that transf is the problem in this inverter.
could be ic oz960g-any way a new board  cost 100 USD''.
I HOPE COSTOMER EXEPET MY OFFER  TO REPLASING A NEW BOARD.
WILLYAM1