Detection - LG UBK80 Service Manual

6. NO DETECTION
6-1. USB
6-1-1. Solution
Replace MAIN board.
6-1-2. How to troubleshoot (Countermeasure)
1) Please check USB Jack, FB901 soldering status. And check 5 V IC213 pin1, pin5.
2) If soldering status and voltage is abnormal status, replace MAIN board.
6-1-3. Service hint (Any picture / Remark)
[5.1VA to 5V_USB2.0]
PWR_CTL5
ONE POINT REPAIR GUIDE
IC213
5.1VA
EN/EN
4
 
IN
5
C276 C284
C281
10uF 1nF _NC
100nF
DGND DGND
USB_DP_P0_FUSB
USB_DM_P0_FUSB
IC213 IC213
 
 
< MAIN board bottom view >
5.1VA
FLT
3
GND  
2
OUT
1
FB901
1 2
CN902
4 3
1
_NC
2
3
DGND
3-41
Copyright © 2020 LG Electronics Inc. All rights reserved.
5V_USB2.0
R270
0OHM
DGND DGND
GND
USB_DP
USB_DM
Only for training and service purposes.