LG LG-E960 - Page 121

4. TROUBLE SHOOTING
- 121 -
Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4.9.2 Checking WIFI,BT
START
Check ANT9001,9002
Check the Contact betwein
[ANT9001,9002] and
[Ant pads on battery cover]
No
Yes
Yes
Yes
Check U9001( LBDA525WVZ-575 )
Check TP1,2,3
C9005 is 1.3v
C23058 is 1.8v
C23052 is 3.0v
Check U23001(PM8921)
No
ANT9001 : Ant. Contact
ANT9002 : Ant. Contact
U23001 : PM8921
U9001 : LBDA525WVZ-575
Test Point Net name Description
TP1 VREG_S2_1P3
Power for WCN analog, digital,
and RF core circuits
TP2 VREG_L4_1P8
Power for XO circuit
and Internal 1.2V LDO input voltage.
Power for WCN digital I/O circuits (1.8V)
TP3 VREG_L10_2P9
Power for WLAN 5GHz, 2.4GHz PA,
, BT Tx and FM Tx driver amplier circuits