3. TROUBLE SHOOTING
- 143 -
Copyright © 2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
START
Replace Main Board
Check USIM,
Check or Replace J13000 (Main PCB)
Check or Replace NFC ANT
in Battery Cover
Check or Replace CN5202, CN5200
Check or Replace U4100
Check or Replace U5200
CN5200, CN5202 : Ant. Contacts
U5200: NFC Chipset
U4100 : PM8941
USIM read ?
NFC ANT. In Battery Cover is normal ?
CN5202, CN5200, ANT Contacts are
normal ?
Signal of C117(TP1)is 19.2MHZ ?
C120(TP2) Voltage is +1.8V ?
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
To Next Page
Loading...
