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LG 43LF510T Service Manual page 13

Chassis lt55a
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4.4. GND & Hi-pot test
4.4.1. GND & HI-POT auto-check preparation
(1) Check the POWER CABLE and SIGNAL CABE insertion
condition
4.4.2. 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.
4.4.3. Checkpoint
(1) Test voltage
1) 3 Poles
- GND: 1.5KV/min at 100mA
- SIGNAL: 3KV/min at 100mA
2) 2 Poles
- SIGNAL: 3KV/min at 100mA
(2) TEST time: 1 second
(3) TEST POINT
1) 3 Poles
- GND Test = POWER CORD GND and SIGNAL CABLE
GND.
- Hi-pot Test = POWER CORD GND and LIVE &
NEUTRAL.
2) 2 Poles
- Hi-pot Test = Accessible Metal and LIVE & NEUTRAL.
(4) LEAKAGE CURRENT: At 0.5mArms
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LG Electronics. Inc. All rights reserved.
Only for training and service purposes
- 13 -
LGE Internal Use Only

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