Samsung SGH-P400 Service Manual page 29

SG H- P400 F low Chart of Troubleshooting
VOSC
C903
22NF
22 21 20 19 18
1 GND
2
RXQP
RXQP
3
(XOUT_EN)
RXQN
RXQN
U900
4
RXIP RXIP
5
RXIN
RXIN
VOSC
23 24 6 7 8
C910
22NF
C911
100PF
CLK13M_RF
C914
100PF
CLK13M_RF
SYN_EN
SERLE
SERCLK
SERDAT
C916 C917
C919
100PF 100PF
100PF
13MHZ_BB
SERDAT
SERCLK
SERLE
17 16
15
SDO
PDNB 14
SI_EN
13
GND
XOENA
ION 12
11
IOP
9 10
VOSC
L900
C912
3.9nH
10PF
GND
GND
GND
GND
VDDI
NC
IFLOP
PDNB
U902
IFLON
SDO
VDDR
SENB
SCLK RFLOP
SDI
RFLON
GND
NC
C918
100PF
MICRO STRIP LINE
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VRFV
C906
C905
22NF
22NF
34 33 32
31 30 29 28 27 26
1
ION
2
IOP
3
CKN
4
CKP
U901
5
TXIP TXIP
6
TXIN
TXIN
7
TXQP
TXQP
8
TXQN
TXQN
35 36 10 11 12 13 14 15
9
VOSC
C913
22NF
C915
10PF
VOSC
C920
22NF
3- 18
SI_EN
C904
RF
100PF
C907
47PF
GSM_PAM_IN
DPCS_PAM_I N
C908
33PF
VRF
RFOD 24
C909
22NF
23
VDD1
RFIGN 22
GSM_LNA_IN_N
21
RFIGP
GSM_LNA_IN_P
RFIDN 20
DCS_LNA_IN_N
19
RFIDP
DCS_LNA_IN_P
RFIPN 18
PCS_LNA_IN_N
17
RFIPP
PCS_LNA_IN_P
16
VRF