LG GT500 - Page 112

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Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
4.11.3 Bluetooth RF path
Check Power level
a
t BT IC Output (C732)
with
Spectrum Analyzer
TP1: Range
0 ~ 4dBm ?
No
Yes
Replace BT Chip (U731)
TP2: Range
0~4dBm ?
Check Power level
a
t RF SW Output (C701)
with
Spectrum Analyzer
Replace ANT780
No
Yes
Replace RF Switch (FL700)
start
TP2
TP1
DEA212450BT-7043C1
5
BP1
4
BP2 BP_DC
2
3
G1
6
G2
1
U_BP
FL730
100pC732
VSS_BT_RF
BT_TXRX
R781
0
WIFI_RF_G
WIFI_RF_G
VSS_BT_RF
4.7nH
R780
XM0830SK-TL1301TMP
ANT
5
GND1
1
GND2
4
GND3
6
GND4
9
GND5
11
13
PGND
8
PORT1
PORT2
2
RFGND1
3
RFGND2
7
12
VCTL
10
VDD
0
FL700
C707
R700
1u
4p
C706C705
4p
C704
DNI
100pC701
R701 0
WIFI_RF_GWIFI_RF_G
C702
1p
VDDK_2V75
C700
0
DUMMY FEED
ANT780
BT_TXRX
WIFI_TXRX
ANT_SEL_N
TP1
TP2