LG SL8YG Service Manual page 38

NO SOUND
2-3. HDMI
2-3-1. Solution
Replace MAIN board.
2-3-2. How to troubleshoot (Countermeasure)
1) Please check soldering status of HDMI jack and check HDMI_5 V & HDMI_5.1 VA at IC207 pin1.
2) If soldering status and HDMI_5 V(FB211) & HDMI_5.1 VA(R2H1) are abnormal, replace MAIN board.
2-3-3. Service hint (Any picture / Remark)
[5.1VA to HDMI_5V]
5.1VA
FB220
220
C2C1
100nF
MICOM
HDMI_P_CTRL
R2H1 R2H1
A R 8 0 1
A R 8 0 2
A R 8 0 3
A R 8 0 4
R 1 3 0
R 8 7 0
R 8 7 1
R 8 7 2
R 8 7 3
R 8 7 4
R 8 7 5
ONE POINT REPAIR GUIDE
IC207
5
IN
C2C2
4
10uF
EN/ENB
DGND
R2C8 4.7K
 
D 2 1 2
R 2 H 1
D 2 0 7
R 8 2 9
I C 8 0 0
R 8 3 6
R 8 3 7
R 8 3 5
< MAIN board top view >
1
OUT
2
GND
3
OCB
C2C4
10uF
DGND
C 2 8 7
F B 2 1 5
L 8 0 1
A R 8 1 3
F B 8 1 5
A R 8 1 2
A R 8 1 1
A R 8 1 0
R 8 6 7
I N T
R 8 4 2
FB211 FB211
R 8 4 3
R 8 3 8
R 8 3 2
C 3 D 8
C 3 D 7
 
C 3 C 9
R 8 7 7
R 8 7 6
I C 2 0 7
R 8 3 3
R 8 3 4
IC207 IC207
C 8 0 2
R 2 8 6
R 2 C 8
3-11
Copyright © 2019 LG Electronics Inc. All rights reserved.
HDMI_5.1VA
HDMI_5V
FB221
R2H1
PZ1608U221-1R4TF
 
0
C2C3
100nF
C 2 1 4
C 2 2 2 R 2 3 7
Z D 2 0 1
C 2 2 0 R 2 3 6
C 2 0 7
C 2 1 9 R 2 3 5
C 2 0 5
C 2 H 6
C 2 1 6 R 2 3 4
R 2 2 2
I C 2 0 1
X 2 0 1
C 2 1 5
R 2 3 1
R 2 3 8 R 2 3 2
C 2 1 8
L 3 0 3
C 3 C 8
C 3 2 6
R 3 1 8
Only for training and service purposes.
 
R
R 2 2 1
R 2 2 0
C 3 B 6
R 2 1 9
R 2 2 3
C
F B 3 1 5
C 2 P 2