LG S90QY Service Manual page 44

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_5V at IC3008 pin6.
2) If soldering status and HDMI_5 V are abnormal, replace MAIN board.
2-3-3. Service hint (Any picture / Remark)
5.1VA
L3006
220
HDMI_PCTRL
ONE POINT REPAIR GUIDE
IC3008
1
IN
C3043
C3039
2
100nF
GND
10uF
/16V
/10V
3
EN
DGND
R3036
51K
DGND
< MAIN board bottom view >
OUT
6
ISET
5
R3045
OCB
4
470
3-9
Copyright © 2022 LG Electronics Inc. All rights reserved.
HDMI_5V
C3051 C3057 C3064
10uF 10uF
100nF
/10V /10V
/16V
DGND
IC3008 IC3008
Only for training and service purposes.