LG GT500 - Page 114

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Only for training and service purposes
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4. TROUBLE SHOOTING
4.12.2 Wi-Fi RF path
TP2
TP1
Check Power level
a
t Wi-Fi module Output (C717)
with
Spectrum Analyzer
TP1: Range
13 ~ 17dBm
at 802.11b?
No
Yes
Replace Wi-Fi module (M710)
TP2: Range
13~17dBm
at 802.11b ?
Check Power level
a
t RF SW Output (C701)
with
Spectrum Analyzer
Replace ANT780
No
Yes
Replace RF Switch (FL700)
start
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
TP2
C725
DNI
WIFI_RF_G
6
SCLK
5
SPI_SDO_
S
7
ESCN
GND1
1
GND2
3
GND3
8
ANT
2
4
ANT_SEL_
P
TP713
100p
WIFI_RF_G
C717
WIFI_TXRX
TP1