LG S90QY - Connecting with an HDMI Cable

3-10
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
ONE POINT REPAIR GUIDE
NO SOUND
2-4. USB
2-4-1. Solution
Replace MAIN board.
2-4-2. How to troubleshoot (Countermeasure)
1) Please check soldering status of USB Jack(JK2000) and check USB_VBUS1 at JK2000 pin1 or TP2041.
2) If soldering status and USB_VBUS1 are abnormal, replace Main board.
2-4-3. Service hint (Any picture / Remark)
R2025
4.7
FL2003
NC
1
2
3
4
D2002
uCLAMP0561P
TP2044
TP2043
TP2042
DGND
TP2041
C2022
10uF
C2021
10uF
C2023
100nF
R2024 4.7
D2000
DF3D6.8MS
3
1
2
DGND
MT8532_USB_DP_P1
MT8532_USB_DM_P1
USB_VBUS1
JK2000
USB JACK_1ST
1
VCC
2
USB_DN
3
USB_DP
4
GND
< MAIN board top view > < MAIN board bottom view >
TP2041
TP2041
JK2000
JK2000