sharp lc52d62u LCD TV no 12V coming out of PSU all other voltages ok

[budm]

Re: sharp lc52d62u LCD TV no 12V coming out of PSU all other voltages ok

Do you have 24vdc on LA CN5701?

[budm]

Re: sharp lc52d62u LCD TV no 12V coming out of PSU all other voltages ok

BTW, the BL-ON signal wire goes directly from main board to the MASTER inverter board. PNL power is not for inverter circuit, it is for switched 12V for the panel T-CON board.

[frankriz99]

Re: sharp lc52d62u LCD TV no 12V coming out of PSU all other voltages ok

CN5701
LA

10V - 10V -- GND --GND 60V -- 60V

cable from main board to inverter board (LB) has 0V on all pins

[budm]

Re: sharp lc52d62u LCD TV no 12V coming out of PSU all other voltages ok

Hmm, I need to look at the inverter board to see what the required Voltages are to run the inverter boards (there are 4 inverter boards).
BTW, did you look at the service manual regarding to the error codes?

[CapLeaker]

Re: sharp lc52d62u LCD TV no 12V coming out of PSU all other voltages ok

Sounds like you have a bad main board to me, since there isn't PNL PWR and no BLon either. Those are generated on the main board.

[frankriz99]

Re: sharp lc52d62u LCD TV no 12V coming out of PSU all other voltages ok

I ordered a new Main board should have it by tuesday fingers crossed

[budm]

Re: sharp lc52d62u LCD TV no 12V coming out of PSU all other voltages ok

So far it looks like your power supply is OK, but you should see error codes, may be the main board is really dead and not showing any blinking codes at all.

[frankriz99]

Re: sharp lc52d62u LCD TV no 12V coming out of PSU all other voltages ok

all i see for codes on main board is 2 solid red led and a constantly flashing red led.

[budm]

Re: sharp lc52d62u LCD TV no 12V coming out of PSU all other voltages ok

The code is in service shows what the power LED flashing codes are, see the service manual as suggested..

[jerry505]

Re: sharp lc52d62u LCD TV no 12V coming out of PSU all other voltages ok

Hi,

I realize this thread is a year old, but my Sharp LC60C52U is doing exactly the same things. In addition, my blink codes are: Power LED 3x, OPC LED 1 x indicating a communication error. Was there a resolution to the problem? Thanks!

Jerry505