Lnb Voltage And 22Khz Tone Check; Option Selection Per Country; Tool Option Selection; Gnd And Internal Pressure Check - LG 42LB65 Series Service Manual

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 Adj 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. Option selection per country

4.8.1. Overview
- Option selection is only done for models in Non-EU
4.8.2. Method
(1) Press ADJ key on the Adj. R/C, then select Country Group
Meun.
(2) Select Country Group Code 04 or Country Group EU.

5. Tool Option selection

▪ Method : Press "ADJ" key on the Adjustment remote control,
then select Tool option.
6. Ship-out mode check(In-stop)
▪ After final inspection, press "IN-STOP" key of the Adjustment
remote control and check that the unit goes to Stand-by
mode.
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes

7. GND and Internal Pressure check

7.1. Method
(1) GND & Internal Pressure auto-check preparation
- Check that Power cord is fully inserted to the SET.
(If loose, re-insert)
(2) Perform GND & Internal Pressure auto-check
- Unit fully inserted Power cord, Antenna cable and A/V
arrive to the auto-check process.
- Connect D-terminal to AV JACK TESTER
- Auto CONTROLLER(GWS103-4) ON
- Perform GND TEST
- If NG, Buzzer will sound to inform the operator.
- If OK, changeover to I/P check automatically.
(Remove CORD, A/V form AV JACK BOX.)
- Perform I/P test
- If NG, Buzzer will sound to inform the operator.
- If OK, Good lamp will lit up and the stopper will allow the
pallet to move on to next process.
7.2. Checkpoint
▪ TEST voltage
(1) DQA Test
- GND: 1.5 KV / min at 100 mA
- SIGNAL: 3 KV / min at 100 mA
(2) Mass Production Line Test
- GND: AC 1.5 KV / sec, Cut off current not exceed 100 mA
▪ TEST time: DQA 1 min, Mass Production Line 1 sec
▪ TEST POINT
- GND TEST = POWER CORD GND & SIGNAL CABLE
METAL GND
- Internal Pressure TEST = POWER CORD GND & LIVE &
NEUTRAL
▪ LEAKAGE CURRENT: At 0.5 mArms
8. Audio
Measurement condition:
No. Item Min
Audio practical
max Output, L/R
1.
(Distortion=10%
max Output)
Speaker (8Ω
2.
Impedance)
(1) RF input: Mono, 1 KHz sine wave signal, 100 % Modulation
(2) CVBS, Component: 1 KHz sine wave signal 0.5 Vrms
(3) RGB PC: 1 KHz sine wave signal 0.7 Vrms
- 19 -
Typ Max Unit
9 10 12 W
EQ Off
8.10 10.8 Vrms
AVL Off
Clear Voice Off
9 10 12 W
LGE Internal Use Only
Remark