sanyo no back ligth

[tom66]

Re: sanyo no back ligth

OK, so the inverter is definitely not working then. Even if a bulb were faulty you should at least see a quick flicker or 2~3 seconds working.

Can you check this resistor R322, it should appear less than 3 ohms on a DMM. (I think it is a fusible resistor.) If it is open, the transistors around that area could be shorted.

[budm]

Re: sanyo no back ligth

We are just using the 5vstb to simulate the BL_ON signal, all other connectors should be connected with the exception of the CN6 which is where the BL_ON from main board is from.
So you are not getting green light on the front panel, everything else should be normal.
Check the voltage at the BL_ON PIN where the resistor is.

[ealequi]

Re: sanyo no back ligth

No flickering at all

[tom66]

Re: sanyo no back ligth

OK, can you make sure in a dark room that the screen doesn't flicker at all?

[ealequi]

Re: sanyo no back ligth

The screen don't lit up

[ealequi]

Re: sanyo no back ligth

power has always been up. i has always been able to turn the tv, the video will play you can here it but can't see it. Nothing has change.

[tom66]

Re: sanyo no back ligth

But now powering it up with the resistor is the screen lit up or not?

[ealequi]

Re: sanyo no back ligth

I have a black screen that went you put a flash ligth you can see the video

[tom66]

Re: sanyo no back ligth

CN6 goes to main board? If that's the case you won't get a power LED, but the backlight should still turn on.

[ealequi]

Re: sanyo no back ligth

should i get power from another place?

[kevinm34232]

Re: sanyo no back ligth

Oh now I see inverter is part of power supply.. So you're just trying to jump the standby voltage over to BL_ON got ya..

[ealequi]

Re: sanyo no back ligth

Guys, don't give up on me, i really want to learn.

[ealequi]

Re: sanyo no back ligth

no, I got video but no backligth

[kevinm34232]

Re: sanyo no back ligth

Or is CN6 going to main board sorry didn't look at the 5 pages completely..

[kevinm34232]

Re: sanyo no back ligth

Bud you said not to have the CN6 harness plugged in, you want plugged in now correct?

Oh nevermind I just saw post above. I may be missing it but without that plugged in how would you get the voltage to the inverter?

[ealequi]

Re: sanyo no back ligth

I did and i have no power at all, not even the green ligth

[budm]

Re: sanyo no back ligth

No. but everything else should be plugged back in.

[ealequi]

Re: sanyo no back ligth

do i plug the cn6?

[budm]

Re: sanyo no back ligth

All the board mounted up, power up the TV and turn it on, the bacjklights should come on. You may want to look at the screen in the dark room so you can see if the backlights flash on at all, it should stay on if the inverter and the lamps are good.

[ealequi]

Re: sanyo no back ligth

now what?