42LG72 (CHASSIS:LA86B) - LG TV Service Manual (repair manual). Page 14

(1) Preparing for the automatic test on the GND & resisting

pressure 

- Make sure that the power cord is completely inserted into

the set. (When it is disconnected or loosened, test after
inserting it)

(2) Perform the automatic test on the GND & resisting pressure

1) The set with power cord, the cord and the A/V

completely inserted into the tuner is loaded on the pallet
and entered into the automatic test process.

2) Connect the D-terminal AV JACK tester
3) Turn on the automatic (GWS103-4)
4) Perform the GND TEST
5) If it is not good, the buzzer is operated to notify the test

result to the operator.

6) If it is OK, it is automatically switched to the resisting

pressure test. (Disconnect the cord and the A/V from the
AV JACK BOX)

6) Perform the resisting pressure test
7) If it is not good, the buzzer is operated to notify the test

result to the operator.

8) If it is OK, the GOOD LAMP is turned and the stopper is

moves down, and it moves to the next process.

(1) TEST voltage

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

(2) TEST time:1 second
(3) TEST POINT

- GND test = between Power cord GND and Signal cable

metal GND

- Resisting pressure test = between Power cord GND and

Live & Neutral

(4) LEAKAGE CURRENT: Set to 0.5mArms 

The Micom upgrade via the external port for the service for
the customer.

1) PC
2) B/D for the interface (IIC & ISP)
3) Jig for downloading (for the power supply)

1) IC name & circuit number: MYSON MTV416GMF & IC4015
2) Power supply: 5V (P4004 Pin 3)
3) SCL: D-sub Pin 10
4) SDA: D-sub Pin  7

1) After executing LGE Monitor Tools v1.1, click the first icon.

(See the figure)

2) When the screen is displayed as shown at the below figure,

set the items as follows:

- MCU Select: MTV512M64
- R/W Option: Auto Write(Verify)
- Jig Option: Myson
- Transmit Speed: Medium
- Check: blank
- PORT: Select the Parallel Port to use (LPT1 in general)

* caution: Select the EPP as LPT from the ROM BIAS setting.

3) Click the Load File Button, and select the desired Hex File

to download. (If no file is displayed, make sure that the file
format is selected as Hex file (*.hex))

4) Click 'Send Button

- 14 -

Interface B/D

Main B/D

PC

PIN No.

KJ705