LG SL7Y Service Manual page 35

NO SOUND
2-3. HDMI
2-3-1. Solution
Replace MPEG/JACK board.
2-3-2. How to troubleshoot (Countermeasure)
1) Please check soldering status of HDMI jack and check HDMI_5V at IC308 pin1.
2) If soldering status and 5.1 VA are abnormal, replace MPEG/JACK board.
2-3-3. Service hint (Any picture / Remark)
5.1VA
HDMI_CTRL
C358
10uF
ONE POINT REPAIR GUIDE
[5.1VA to HDMI_5V]
IC308
R369 4.7K
5
IN
C359
1uF 4
EN/ENB
/25V
C360
1nF
DGND
DGND
C 2 1 3
< MPEG/JACK board bottom view >
1
OUT
2
GND
C361 C362
3 10uF 10uF
OCB
C 8 1 4
C 8 1 3
C 8 0 8
C 8 0 7
C 2 1 5
F B 2 0 3
C 8 2 4
D 8 0 1
3-10
Copyright © 2019 LG Electronics Inc. All rights reserved.
HDMI_5V
FB316
PZ1608U221-1R4TF
C363 C374
1uF 100nF
DGND
C 8 1 5
R 8 1 2
R 8 2 0
C 3 6 2
C 8 1 2
C 3 6 1
F B 3 1 6
C 3 6 3
C 8 2 1
C 8 1 8
I C 3 0 8
C 3 6 0
C 3 5 9
R 3 6 9
C 3 5 8
IC308 IC308
Only for training and service purposes.