LG OLED77G6P, Service Manual, Page: 20 / 108

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Only for training and service purposes
5.8. HDMI ARC Function Inspection
5.8.1. Test equipment
- Optic Receiver Speaker
- MSHG-600 (SW: 1220 ↑)
- HDMI Cable (for 1.4 version)
5.8.2. Test method
(1) Insert the HDMI Cable to the HDMI ARC port from the
master equipment (HDMI2)
(2) Check the sound from the TV Set
(3) Check the Sound from the Speaker or using AV & Optic
TEST program (It’s connected to MSHG-600)
5.9. Tool Option Inspection
(1) Press Adj. key on the Adj. R/C, and then check Tool option
5.10. 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
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
(1) Test voltage
- GND: 1.5KV/min at 100mA
- SIGNAL: 3KV/min at 100mA
(2) TEST time: 1 second
(3) TEST POINT
- GND Test = POWER CORD GND and SIGNAL CABLE
GND.
- Hi-pot Test = POWER CORD GND and LIVE &
NEUTRAL.
(4) LEAKAGE CURRENT: At 0.5mArms
7. AUDIO output check
No Item Min Typ Max Unit Remark
1 Audio practical
max Output, L/R
(Distortion=10%
max Output)
9 10 12 W EQ Off
AVL Off
Clear Voice Off
6.07 8.10 10.8 Vrms
2 Speaker
(8Ω Impedance)
9 10 12 W EQ On
AVL On
Clear Voice On
*Measurement condition:
(1) RF input: Mono, 1KHz sine wave signal, 100% Modulation
(2) CVBS, Component: 1KHz sine wave signal (0.4Vrms)