sharp aquos LC-80LE632U led tv lamp error

[freakaftr8]

Re: sharp aquos LC-80LE632U led tv lamp error

[freakaftr8]

Re: sharp aquos LC-80LE632U led tv lamp error

okay guys it's working now I don't know how or why but as soon as I did a series of tests I tried another key combination back on the keyboard this time I used volume up and channel down well plugging in the TV at the same time and long and behold beautiful picture came up. Obviously volume up and channel down reset the main board to factory specs. I didn't look to see how many error counts are in there but it works!

now here's the kicker as soon as you unplug to TV plug it back in it's back to the one fast flash one slow flash lamp error. But if you do the vol up channel down its back in action and powers up and off with no problem.

I did notice OFL pin is 3.3v constantly now when on.

[budm]

Re: sharp aquos LC-80LE632U led tv lamp error

That is Stand by pin, same as PS_ON. 3.3v = ON, 0V = off.

[freakaftr8]

Re: sharp aquos LC-80LE632U led tv lamp error

There is a pin labeled STB. 0v on the pin until lamps come on. Tjen jumps to 3.3v. As soon as lamps go back out it goes back to 0v

[freakaftr8]

Re: sharp aquos LC-80LE632U led tv lamp error

SDA pin is brightness control data signal
SCL pis is brightness control clock signal
I tried a series of jumpers jumping 3.3 volts from panel power to error and still shut down then I tried panel powers 3.3 volts to OFL pin. Same result

[freakaftr8]

Re: sharp aquos LC-80LE632U led tv lamp error

Well error pin stays at 0 the whole process. However OFL is on the duration of powerup and as soon as the leds come up its voltage dies off.

PS_ON dies off after led shutdown

[freakaftr8]

Re: sharp aquos LC-80LE632U led tv lamp error

oh okay I get it okay so service state is when I get the panel lite up and shut downas soon as I get home I'll check it out report

[tom66]

Re: sharp aquos LC-80LE632U led tv lamp error

I thought you press buttons and got panel to light up briefly right? That's what I mean by service state.
RS232 can be connected to PC, using settings in user manual. It might output some useful information.

[freakaftr8]

Re: sharp aquos LC-80LE632U led tv lamp error

yes it does have an rs232 port. what do you mean when you say monitor it in service state. and what do I do with the RS 232 port?

[tom66]

Re: sharp aquos LC-80LE632U led tv lamp error

Does the main board have an RS232 port on it perhaps?
Monitor ERROR as set powers on.
If ERROR does not change state from standby to power on, it's probably NOT a lamp error.
Then monitor BLON, in the service state. When backlight goes off, does BLON die immediately, or afterwards?

[freakaftr8]

Re: sharp aquos LC-80LE632U led tv lamp error

Nothing on the pinout is defined as lamp_error. Just error. I tried removing the pin from the loom and also tried shorting the pin to ground using a 150 ohm resistor. same fault. I have researched the net and found someone who had the same fault on a.70 inch version and he replaced the inverter/power supply to restore the backliight issue cause he had no backlights at all with any key combination he tried. Then had the same problem im at. Then he replaced the mainboard and bingo worked great

[freakaftr8]

Re: sharp aquos LC-80LE632U led tv lamp error

Heres the pinout.

[budm]

Re: sharp aquos LC-80LE632U led tv lamp error

I hate EEPROM problems!

[johnboy1313]

Re: sharp aquos LC-80LE632U led tv lamp error

What happens if u put in your old board?

When I put the old board back in, it worked fine but no HDMI's. I wound up pulling the EEPROM from the old board and putting in on the new board. Now everything works but the WI-FI, which did work on the old board. I haven't figured that one out yet. Ethernet does work however.

[tom66]

Re: sharp aquos LC-80LE632U led tv lamp error

Ugh, well it's probably a semi custom Sharp IC without a datasheet.
Check LAMP ERROR what does it do? Go high, low, what? After this, BL ON/OFF (or similar) changes too?

[freakaftr8]

Re: sharp aquos LC-80LE632U led tv lamp error

Here's the whole back side of the board

[freakaftr8]

Re: sharp aquos LC-80LE632U led tv lamp error

Btw I used a 150 ohm from error pin to ground. Same issue.

[freakaftr8]

Re: sharp aquos LC-80LE632U led tv lamp error



led controller/ driver

[tom66]

Re: sharp aquos LC-80LE632U led tv lamp error

Yeah through a 100 ohm resistor to limit current though.

[freakaftr8]

Re: sharp aquos LC-80LE632U led tv lamp error

Got a pic, ill upload it. What would I short lamp error signal to on the wire loom to the mainboard. Ground possibly?

Pin22 on cable is just stated error. Thats it is this lamp error possibly?