sanyo no back ligth

[ealequi]

Re: sanyo no back ligth

should i get power from another place?

[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

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

[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

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.

[ealequi]

Re: sanyo no back ligth

The screen don't lit up

[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

No flickering at all

[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.

[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.

[ealequi]

Re: sanyo no back ligth

ok i will check it now

[ealequi]

Re: sanyo no back ligth

one more thing, if i don't plug cn6 i get nothing. when it is plug i get the green ligth in from, video and sound, withou cn6 it wont even turn on.

[budm]

Re: sanyo no back ligth

That means must be using output signal from one of the pin on CN6, what you can do is to put CN6 back in, but cut the BL_ON WIRE, leave the wire long enough so you can splice it back together. I will look at the diagram to see what is going on.
OK, it also uses pin 1 of CN6 for supplying the 5VSTBY to board beside 5vstby on CN2.

[tom66]

Re: sanyo no back ligth

Just don't cut it right close to the pin or you won't be able to reconnect it easily.

[MisterD]

Re: sanyo no back ligth

Pic is very good one of the best I have seen for some time.
If you pan along the white line in the middle to the hole
Just below the hole there are 3 resistors and next to them
C902 Just below that there is an odd bit of solder?
May not be doing any harm but can you check it out.

I agree with selldoor that looks like solder to me and not dust, it appears that someone may have been soldering something and some of the hot solder dripped there, I recommend examining the bottom of this board very close and with the power off and TV Unpugged, brush off anything that looks like that.

[ealequi]

Re: sanyo no back ligth

the reading on r322 is 3ohm

[ealequi]

Re: sanyo no back ligth

I agree with selldoor that looks like solder to me and not dust, it appears that someone may have been soldering something and some of the hot solder dripped there, I recommend examining the bottom of this board very close and with the power off and TV Unpugged, brush off anything that looks like that.

i already did.

[ealequi]

Re: sanyo no back ligth

That means must be using output signal from one of the pin on CN6, what you can do is to put CN6 back in, but cut the BL_ON WIRE, leave the wire long enough so you can splice it back together. I will look at the diagram to see what is going on.
OK, it also uses pin 1 of CN6 for supplying the 5VSTBY to board beside 5vstby on CN2.

when you said wire, are you refering to the resistor i put on?

[MisterD]

Re: sanyo no back ligth

He is saying plug connector CN6 back in and to just cut the one BL_ON wire into that's on CN6, leave it at least 3 inches long at the end going to that connector (CN6) so you will be able to splice it back together later, Leave the resistor where it is and turn on the TV and see if you now have backlights.

[ealequi]

Re: sanyo no back ligth

what about the wire that he want fromstb5v on cn2 to stb5v oncn6?