LG 42LE5400, Service Manual

Page: 16 / 85

- 16 - LGE Internal Use Only Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
6. GND and Hi-pot Test
6.1. Method
6.1.1. GND & HI-POT auto-check preparation
(1) Check the POWER CABLE and SIGNAL CABE
insertion condition
6.1.2. GND & HI-POT auto-check
(1) Pallet moves in the station. (POWER CORD / AV
CORD is tightly inserted)
(2) Connect the AV JACK Tester.
(3) Controller (GWS103-4) on.
(4) GND Test (Auto)
- If Test is failed, Buzzer operates.
- If Test is passed, execute next process (Hi-pot test).
(Remove A/V CORD from A/V JACK BOX)
(5) HI-POT test (Auto)
- If Test is failed, Buzzer operates.
- If Test is passed, GOOD Lamp on and move to next
process automatically.
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