LG GT500 - Bluetooth Trouble

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
4.11 Bluetooth Trouble
Bluetooth IC (STLC2593) gets power from PMIC (AB3100) and clock (MCLK) from RFIC. (RF3300)
After checking them, Bluetooth RF path should be examined.
4.11.1 Bluetooth Power path
TP2
TP1
start
1. Check
BT IC Block
TP1: 1.8V , TP2 : 2.75V
2. Check
Mainboard Connector
TP3: 1.8V , TP4 : 2.75V
1
1
2
Go to 4.11.2
OK
NG
Replace Sub
PCB
OK
NG
Check AB3100
(U300)
Sub PCB
Main PCB (Bottom side)
2
TP3
(2
nd
pin from the end
of the connector)
TP4
(3
rd
pin from the end
of the connector)
VDDK_2V75
VDD_BT
C735 0.1u C736 0.1u
D4
NC1
NC2
F7
F8
NC3
NC4
L4
C1
C2
BT_RSVR_N
BT_RSVR_RF
M2
E6
BT_VDD_CLD
BT_HVD
N7
BT_REG_CTRL
J4
BT_RSVR_CL1
B2
BT_RSVR_CL2
C3
M8
BT_RSVR_D
BT_RSVR_DSM
0R742
TP1
TP2
59
60
G1 G2
556
57
583
4
2
CN601
1
VDDE_1V8
R638
0
VDDK_2V75
TP3
TP4