Re: LG 65EC970V 65EC9700 - OLED TCON bad fpga voltage?

Hello, I'm back after few days. Finally I got proper scart output converter and connected to second TV via euro scart cable. Picture and sound from cable TV connected to oled, and transferred to second TV is ok. But it looks that OSD from oled is not transmitted over scart cable, only pure picture and sound. I think it's normal, because even if I do volume up or down on oled, it is changing sound level on oled TV only. On second TV sound is always on the same level. Volume control on oled doesn't affect on sound in oled scart...

Re: LG 65EC970V 65EC9700 - OLED TCON bad fpga voltage?

No picture happened at cold start few days later from last use. I used it for few hours a week. Just only sound from cable tv. TV is normally operable by remote control. Panel was in very good condition, no any burned pixels. Last time I've checked at service menu, UTT was about 1450 hours, so not very much at all. It may have maybe 100 hours more right now, played by me for last half a year.

There are two "Lock" (exactly there are three) LEDs on boards, which indicates good LVDS signal between boards...

Re: LG 65EC970V 65EC9700 - OLED TCON bad fpga voltage?

I measured voltages on connectors on downside of panel. There seems to be no short circuits:

EVDD = 24.08 V
SVDD_L = 16.00 V
SVCC1.8 = 1.79 V
VPRED = 6.05 V
VPRER = 0.30 V
VPRES = 0

Left side photo attached, right side has the same measurements (altrough SVDD_R = 16.00V)

After 1 minute power up:
With panel ribbons connected 34.9 W on power cord
with panel ribbons disconnected 30.2 W on power cord

So not driven panel takes some power.....

Re: LG 65EC970V 65EC9700 - OLED TCON bad fpga voltage?

I didn't remove any coils so far. I've also wondering why they are not straight soldered, but I can see the same on other t-con on web, 6870C-0514D and 6870C-0514J also have strangly positioned coils. It looks this must be done so wierd in factory.

Anyway, L12 should be ok, volgate after it is rock solid 1.802V...

Hello,

This is my first repair of new digital TV, I've only repaired mobile phones, notebooks etc. so far and some old TVs.

Symptoms: no picture; power on normally, joystick key and remote control works ok, tv is programmed with cable tv, changes channels, play sound normally, etc. TV has been working normally, but just picture disapearred one day.

TV has 4 boards:
- power supply
- mainboard
- some kind of OSD+Video mixer board (called URSA9 in service manual)
- T-con board.

Video signal goes like that: mainboard...

Re: New Members - please post your introductions here

Hello, I'm 34 years old and I've been working full-time at mobile phones repair service since 2003. Electronics was my hobby as far as i can remember I like fixing some electronics stuff like laptops, tv and any other home stuff for family and friends. I'm here to learn more from you.