hitachi L42S02A

[willyam1]

HI.
problem is sound ok no backlight.
inverter 6632L-0503B.
24VOK.
FROM MAIN BOARD- 3.3V OK INV/ON 3.1V OK .
4 FET NOT SHORT SMD FUSE OK.
INV IC CONTROLLER OZ9966SN.
Icheck all resi diode and tra smd all ok.
any schematic to this inv or anyone already repear this inv any data to this ic.
i change 3 capi 680/35 but no cure.
thanks willyam1

[tom66]

Re: hitachi L42S02A

Does LED light on inverter?

[willyam1]

Re: hitachi L42S02A

no i dont see any led.
willyam.
i notice that the vcc pin8 in the comperator 2903 is missing i will check were is the suooly to that pin.
willyam

[willyam1]

Re: hitachi L42S02A

need schematic.
willyam

[tom66]

Re: hitachi L42S02A

No schematics for LG inverters exist AFAIK, apart from the ones which have been reverse engineered. However, if you don't even get the thing attempting to light the bulbs, I'd look towards the main controller chip being bad, or one of its supply voltages being low.