LG 55LA9709, Service Manual

Page: 20 / 24

- 20 -
LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4.6. Wi-Fi Test
Step 1) Turn on TV
Step 2) Select Network Connection option in Network Menu.
Step 3) Select Start Connection button in Network Connection.
Step 4) If the system finds any AP like blow PIC, it is working
well.
4.7. LNB voltage and 22KHz tone check
(only for DVB-S/S2 model)
▪ Test method
(1) Set TV in Adj. mode using POWER ON.
(2) Connect cable between satellite ANT and test JIG.
(3) Press Yellow key(ETC+SWAP) in Adj Remote control to
make LNB on.
(4) Check LED light ‘ON’ at 18 V menu.
(5) Check LED light ‘ON’ at 22 KHz tone menu.
(6) Press Blue key(ETC+PIP INPUT) in Adjustment Remote
control to make LNB off.
(7) Check LED light ‘OFF’ at 18 V menu.
(8) Check LED light ‘OFF’ at 22 KHz tone menu.
▪ Test result
(1) After press LNB On key, ‘18 V LED’ and ‘22 KHz tone
LED’ should be ON.
(2) After press LNB OFF key, ‘18 V LED’ and ‘22 KHz tone
LED’ should be OFF.
4.8. Inspection of light scattering
▪ Test Method
(1) Push “Power only” key.
(2) Push “HDMI” hot key.
(3) Inspect whether light scattering is occurred in internal
black pattern or not.
(4) Push “Power only” key.
4.9. Option selection per country
4.9.1. Overview
- Option selection is only done for models in Non-EU.
4.9.2. Method
(1) Press ADJ key on the Adjustment Remote Control, then
select Country Group Meun
(2) Depending on destination, select Country Group Code 04
or Country Group EU then on the lower Country option,
select US, CA, MX. Selection is done using +, - or ►◄
key.
4.10. MHL Test
(1) Turn on TV
(2) Select HDMI4 mode using input Menu.
(3) Set MHL Zig(M1S0D3617) using MHL input, output and
power cord.
(4) Connect HDMI cable between MHL Zig and HDMI4 port.
(5) Check LED light of Zig and Module of Set.
Result) If, the LED light is green and the Module shows
normal stream → OK, Else → NG