LG 77EG9700, Service Manual

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LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
(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. UHD 4K Test
(1) Video Inspection(UDG-4004NS)
1)Insert the HDMI Cable to TV Set.
2) Convert to HDMI Mode using TV/AV Key on ADJ remote
controller
3)Inspect the sound and picture operation well.
(Color condition, Picture noise, Sound distortion etc.)
4)Inspection 2D → 3D conversion
(2) Pattern Inspection (MSPG-7100)
1)Insert the HDMI Jack to HDMI 3 Port.
2)Convert to UHD Inspection Pattern. (Use remote
controller)
3)Check Video and Sound.
4)Convert to 64 Gray Inspection Pattern. (Refer to Pictures)
5)Check Video and Sound.
6)Inspect HDMI-CEC function. (Push Play & Pause button)
(3) 4K Inspection.(HEVC Inspection model only)
1) Insert USB that 4K video file is saved.
2) Check that the video plays normally.
5.8. PIP/ W&R Function Inspection
(1) Objective : To check the connection between sub tuner and
PCBA, and their Function
(2) Test Method : This Inspection is available only Power-Only
Status.
1) Press exit key of the Adj. R/C and Press PIP key.
2) Check that the SUB TUNER pop up window on the TV
Set.
3) Check that the normal operation (picture, sound) of DTV
on the TV Set.
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)
(3) RGB PC: 1KHz sine wave signal (0.7Vrms)
6.2. Specification
No Item Min Typ Max Unit Remark
1 Audio
practical
max Output,
L/R
(Distor-
tion=10%
max Output)
10.35
9.09
11.5
9.59
12.65
10.05
W
Vrms
(1) Measurement
condition
- EQ/AVL/Clear
Voice: Off
(2) Speaker (8Ω
Impedance)