Audio Output Check; Gnd And Hi-Pot Test; Hdmi Arc Function Inspection; Gnd & Hi-Pot Auto-Check - LG 32LH550B Service Manual

5.6. HDMI ARC Function Inspection

5.6.1. Test equipment
- Optic Receiver Speaker
- MSHG-600 (SW: 1220 ↑)
- HDMI Cable (for 1.4 version)
5.6.2. Test method
(1) Insert the HDMI Cable to the HDMI ARC port from the
master equipment (HDMI1)
(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)
* Remark: Inspect in Power Only Mode and check SW version
in a master equipment
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.
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Only for training and service purposes

6. AUDIO output check

6.1. Audio input condition
(1) RF input: Mono, 1KHz sine wave signal, 100% Modulation
(2) CVBS, Component: 1KHz sine wave signal (0.4Vrms)
6.2. Specification
No Item Min
1 Audio 4.5
practical max 6.0
Output, L/R
(Distor-
tion=10%
max Output)
2 2.7
4.03

7. GND and HI-POT Test

7.1. GND & HI-POT auto-check preparation
(1) Check the POWER CABLE and SIGNAL CABE insertion
condition
7.2. 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 automatica
- 15 -
Typ Max Unit Remark
5.0 6.0 W (1) Measurement
6.32 6.93 Vrms condition
- EQ/AVL/Clear
Voice: Off
(2) Speaker (6Ω
Impedance)
(3) 49/43LH57
3.0 3.6 W (1) Measurement
4.24 4.64 Vrms condition
- EQ/AVL/Clear
Voice: Off
(2) Speaker (6Ω
Impedance)
(3) 32LH57
LGE Internal Use Only