LG 26LH20 Series, Service Manual

Copyright © 2009 LG Electronics. Inc. All right reserved. 
Only for training and service purposes

LGE Internal Use Only

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5.6. Tool Option selection

• Method: Press Adj. key on the Adj. R/C, then select Tool
option. 

5.7. Ship-out mode check (In-stop)

• After final inspection, press In-Stop key of the Adj. R/C and

check that the unit goes to Stand-by mode.

• After final inspection, Always turn on the Mechanical S/W.

6. GND and Internal Pressure check

6.1. 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.

6.2. Checkpoint

• TEST voltage

- GND: 1.5KV/min at 100mA
- SIGNAL: 3KV/min at 100mA

• TEST time: 1 second
• TEST POINT

- GND TEST = POWER CORD GND & SIGNAL CABLE

METAL GND

- Internal Pressure TEST = POWER CORD GND & LIVE &

NEUTRAL

• LEAKAGE CURRENT: At 0.5mArms

7. USB S/W Download (option)

(1) Put the USB Stick to the USB socket 
(2) Automatically detecting update file in USB Stick

- If your downloaded program version in USB Stick is Low,

it didn’t work.

But your downloaded version is High, USB data is
automatically detecting

(3) Show the message “Copying files from memory”

(4) Updating is staring.

(5) Updating Completed, The TV will restart automatically
(6) If your TV is turned on, check your updated version and

Tool option. (explain the Tool option, next stage)

* If downloading version is more high than your TV have,

TV can lost all channel data. In this case, you have to
channel recover. if all channel data is cleared, you didn’t
have a DTV/ATV test on production line.

* After downloading, have to adjust TOOL OPTION again.

1) Push "IN-START" key in service remote controller.
2) Select "Tool Option 1" and Push “OK” button.
3) Punch in the number. (Each model has their number.)

Model

Tool1 Tool2 Tool3 Tool4

Menu

42LH30 24705 2600

932

1152 3HDMI, CAN Tuner, 1RCA