Samsung B2700 Service Manual page 65

Flow Chart of Troubleshooting
F200
C207
C206
1 4
3G_TX OUT
IN
G G G
2 3 5 L205
L204
RF_DAC2
VREF_3G_B1
VCC_RX_TX_2.8V
C103
RAMP_PAM
GSM_850_900_TX
DCS_PCS_TX
C106
18 17
PON_4220 _PDN
19
PCS_RXP
RFIPP
20
PCS_RXM
RFIPN
21
DCS_RXP
RFIDP
22
AERO4221HN/1
DCS_RXM
RFIDN
23
GSM_RXP_900
RFIEP
24
GSM_RXM_900
RFIEN
25
GSM_RXP_850
RFIAP
26
GSM_RXM_850
RFIAN
27
28
29 3 0 31
VCC_RX_TX_2.8V
C126
D_REF_CLK
0
BT_CLK_REQ
L200 L201
PAM200
C201 C200
C208
C205
L206
13
19 18 17 16 15 14
1 12
RFIN VCC2
2
11
VCC2
NC
3
10
VCC2
VMODE
4
RFOUT 9
VREG
20
NC
5 6 7 8
C215 C216
VCC_SYN_2.8V
C101
C100
VDD_IO_LOW_1.8V
R102
C107
10
16 15 14 13 12 11
C110
_RES
9
XOUT
8
BIP
7
U100
BIN
6
BQP
5
BQN
4
SCLK
3
SDIO
2
_SEN
1
C115
37 39
38 R105
32 33 34 35 3 6
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VBAT
DUF200
C211
C210
L220
L209
L208
RAMP
<VCTCXO>
BT_CLK_26M
VCC_RX_TX_2.8V
BB2G_REF_CLK
IRX_TX_P
IRX_TX_N
C113
R103
QRX_TX_P
QRX_TX_N
RF_CLK
RF_DATA
AFC
RF_EN
C117
10-28
C204
L203 C209
2
C213
ANT
7 TX RX 5
1 3 4 6 8 9
L210 C214
OSC401
C111
26MHZ
D_REF_CLK
4 3
VCC OUT
2
1 VCONT GND
5 6 7 8
3G
LNA_IN