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SGH-P400 Flow Chart of Troubleshooting
3-
18
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(XOUT_EN)
MICRO STRIP LINE
C915
10PF
C912
10PF
100PF
C914
100PF
C911
VOSC
22NF
C903
C910
22NF
100PF
C918
VRFV
RF
3.9nH
L900
VOSC
VOSC
SDO
10
11
SENB
5
VDDD
VDDI
28
25
VDDR
XI
N
7
20
RFL
A
RFL
B
19
RFL
C
17
RFL
D
16
23
RFLON
RFLOP
24
SCLK
12
13 SDI
GND
30
3
IFLA
IFLB
2
IFLON
26
27
IFLOP
NC
8
NC
14
9
PDNB
GND
32
GND
4
GND
6
15
GND
18
GND
21
GND
GND
22
29
GND
U902
1
GND
31
GND
47PF
C907
33PF
C908
C909
22NF
C920
22NF
100PF
C917
VRF
22NF
C905
C916
VDD4
26
VOSC
100PF
25
RFOG
6
TXIN
5
TXIP
TXQN
8
7
TXQP
23
VDD1
VDD2
14
VDD3
32
19
RFIDP
RFIGN 22
21
RFIGP
RFIPN 18
17
RFIPP
RFLON
13
RFLOP
12
RFOD 24
10
IFLO
N
IFLO
P
9
ION
1
2
IOP
29
L1
L2
28
31
PDNB
RFIDN 20
15
DIAG
2
11
GND
27
GND
GND
30
33
GND
GND
34
GND
35
GND
36
U901
CKN
3
CKP
4
DIAG
1
16
C913
22NF
100PF
C919
C906
22NF
VOSC
SCL
K
SDI
18
15
SDO
SENB
16
VDDA
20
6
VDDC
7
XI
N
19
XOUT
ION 12
11
IOP
PDNB 14
5
RXIN
4
RXIP
3
RXQN
RXQP
2
17
CKN
CKP
9
1 GND
8
GND
13
GND
21
GND
GND
22
GND
23
GND
24
U900
10
C904
100PF
VRF
GSM_PAM_IN
DPCS_PAM_IN
PCS_LNA_IN_P
PCS_LNA_IN_N
XOENA
SERCLK
SERDAT
SERLE
13MHZ_BB
DCS_LNA_IN_P
TXIN
TXIP
TXQN
TXQP
SYN_EN
SERDAT
SI_EN
GSM_LNA_IN_N
GSM_LNA_IN_P
DCS_LNA_IN_N
RXIP
RXIN
RXQP
RXQN
CLK13M_RF
SERLE
SERCLK
CLK13M_RF
SI_EN