kdl-40nx723 e double image help please

[tom66]

Re: kdl-40nx723 e double image help please

Do these voltages change when the ribbons are removed?

[wreksta]

Re: kdl-40nx723 e double image help please

not rreally tom but whats bothering me is
inb and out b both are 1v or lower

according to that lad should be at 7-8v

shed any light on this please

[wreksta]

Re: kdl-40nx723 e double image help please

where can I get data or specs of this tcon tom

[tom66]

Re: kdl-40nx723 e double image help please

Nobody publishes such information; anmol's info will be from his testing or elsewhere.

I think your T-con is working OK - the IN/OUT will depend on the exact image being displayed at any one time.

You should focus on why the image becomes distorted when only one ribbon is in place. I'd focus on the panel driver PCB and tab bonds. Maybe one of the signals is shorted on the COF IC (bad source COF IC = bad panel)

[wreksta]

Re: kdl-40nx723 e double image help please

right if I take the left ribbon out the screen will come on then fade the pic to bright white with spots lol

if I remolved right ribbon I get full pic on left side no errors but right stays white

[tom66]

Re: kdl-40nx723 e double image help please

Yeah, I don't know what else to say but it has every symptom of a bad panel issue. You can try a T-con board but I don't expect any difference.

Maybe anmol will have more ideas.

[wreksta]

Re: kdl-40nx723 e double image help please

tom

what is ina outa -inb outb if they control each picture side and b shows low voltage could this be an issue as anmol said the should be 6-7 v on both

[tom66]

Re: kdl-40nx723 e double image help please

I don't know for sure.
They could be low if the panel is shorted, or if one half is not outputting such a signal.
Maybe check each end for shorts to ground (power off, 2000 ohm range.)

[wreksta]

Re: kdl-40nx723 e double image help please

Maybe check each end for shorts to ground (power off, 2000 ohm range.)

explain tom please

[tom66]

Re: kdl-40nx723 e double image help please

Go and look up Youtube videos or online tutorials on how to use a multimeter. To be more specific, test the resistance from each point to ground, using your meter's 2000 ohm range.

[wreksta]

Re: kdl-40nx723 e double image help please

ok so test vofee vone vcc33 etc yeah

[tom66]

Re: kdl-40nx723 e double image help please

For now, only INA/OUTA/INB/OUTB.

[wreksta]

Re: kdl-40nx723 e double image help please

I don't get readings from the ina outa inb outb
Using meter on the 2k ohms

I do get readings on the other points

[tom66]

Re: kdl-40nx723 e double image help please

No shorts there then, so it's not an obvious fault. Any further troubleshooting is probably best done using a scope.

For now, my bet is 5% T-con, 95% panel fault.