So, I got this UE40K1502AK(XXH) TV from a friend.
TV has no picture or sound, but it reacts on remote control and power button on bottom side.
- When plugged into mains, the LED is red on. If I use remote to power it on for the first time, it flashes 6x then LED remains off. I assume this would be the same as by normal tv?
- LED also flashes fast when I push any button on remote controller. If I turn it off with remote, the LED will lit solid red. And by next turn-on with remote, it flashes 5x. Also will flash fast when any remote button is pressed.
- The background illumination LED strips are dead, so I can not confirm about the picture - at least I didn't see anything with flashlight.
- I disconnected backlight and used 2 resistors 47ohm/20W in series, to stimulate backlight. Power supply gives 66 V and 710 mA (100% PWM) when Mainboard is disconnected, and 25% PWM when Mainboard is connected.
- All voltages I measured seems reasonable and present (8/13V for Mainboard when standby/full_on, its 5 V ; 3,3 V ; 1,8 V are present at LDOs.) Also voltages on LCD-panel are there (30V ; 12 V ; 3,3 V ; 1,8 V ; 1,2V...). The only fuse there is OK.
- Capacitors on Power-supply were measured and OK. The main capacitor on DC-Link and for backlight primary supply hold their charge for 10 minutes after disconnection from mains.
- CPU is reasonably warm, but not very hot.
- I have desoldered IC801 and IC805 memories and have it here.
Can anyone see anything from the memory content, or is there other fault to be known?
Thank you!
TV has no picture or sound, but it reacts on remote control and power button on bottom side.
- When plugged into mains, the LED is red on. If I use remote to power it on for the first time, it flashes 6x then LED remains off. I assume this would be the same as by normal tv?
- LED also flashes fast when I push any button on remote controller. If I turn it off with remote, the LED will lit solid red. And by next turn-on with remote, it flashes 5x. Also will flash fast when any remote button is pressed.
- The background illumination LED strips are dead, so I can not confirm about the picture - at least I didn't see anything with flashlight.
- I disconnected backlight and used 2 resistors 47ohm/20W in series, to stimulate backlight. Power supply gives 66 V and 710 mA (100% PWM) when Mainboard is disconnected, and 25% PWM when Mainboard is connected.
- All voltages I measured seems reasonable and present (8/13V for Mainboard when standby/full_on, its 5 V ; 3,3 V ; 1,8 V are present at LDOs.) Also voltages on LCD-panel are there (30V ; 12 V ; 3,3 V ; 1,8 V ; 1,2V...). The only fuse there is OK.
- Capacitors on Power-supply were measured and OK. The main capacitor on DC-Link and for backlight primary supply hold their charge for 10 minutes after disconnection from mains.
- CPU is reasonably warm, but not very hot.
- I have desoldered IC801 and IC805 memories and have it here.
Can anyone see anything from the memory content, or is there other fault to be known?
Thank you!
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