Samsung GT-B2100 Service Manual page 68

2
VLOGIC
3
VRAMP
4
TX_EN
27
GSM_IN
29
DCS|PCS_IN
PCS RX
BAL2
9
BAL2 8
BAL1
7
HIGH_RX UNBAL BAL1 6
1
F101
DCS RX
GSM900 RX
GSM900_OUT 9
GSM900_OUT
8
GSM850_OUT
7
LOW_RX 1 IN GSM850_OUT 6
F102
GSM850 RX
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PAM100
C120
L106
C121
L107
L108
L109
L110
L111
L112
C122
L113
C123
VCC_SYN_2.8V
REF_ON_PMU
R102
RF_RESET
C124
C125
OSC100
RF_CLK
RF_EN
RF_DATA
10-31
Flow Chart of Troubleshooting
BS1 5
BS2 6
12
RX1
RX2 13
NC 11
14
NC
XMODE
XDIV RFOH
AFC
RFOL
VDD
GND
VDD VDD
U101
XTAL2
VDD
XTAL1
VIO
XEN
_RESET
GND
_PDN
NC
NC
R101
DCS_TX
EGSM_TX
R103
VDD_RX_TX_2.8V
VDD_IO_LOW_1.8V
RF_RESET
PON_3587_SYNTH
C126
D_REF_CLK
C127
BT_CLK
RX_TX_IP
RX_TX_IN
RX_TX_QP
RX_TX_QN