Samsung SGH SGH X105, Service Manual

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SGH-X105 Flow Chart of Troubleshooting
4- 16
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MICRO STRIP LIN
E
RF314
0
10PF
VOSC
C433
VR
F
C421
6.3V
CN400 G1
3
G2
4
IN
1
OU
T
2
100UF
C435 10N
F
C438 10NF
OSC400
2
GND
3
OUT VCC
4
VT
1
1.2P
F
270PF
C426
C416
1N
F
C432
22NF C401
0.75PF
C408
100 R416
10NF C423
22NF C424
10PF C425
TP71
7TP71
8
VRF
TP715
TP716
560 R414
G1
1
G2
3
5
G3
IN
2
OUT1
4 6
OUT2
R415 10
K
F401
VRF
AN
T
1
1 2
2
PCSRX
13
VC1 VC2
11
VC3
5
R402
0
EGSMRX EGSMRX
2
12
EGSMTX
7
G
G
14
16
G
G
19
20
G
6
F400
ANT
15
DCSRX
3
DCSRX
4
DCS/PCSTX
10
1
NC R411
100K
R410
22NF C403
C422 NC
C430
1N
F
C411 22NF
0
R406
NC
C418
NC C428
2.7nH
L407
NC C409
L402 27nH
150
C439 10N
F
R412
C429
0.5PF
0.75PF
C410
47PF C405
C415
1.2PF
30
R407
C404 22NF
C434 1N
F
R417 150
4
OU
T
VC
C
5
VRF
U404
3
GND
2
IN
NC
1
VPAC
VRAM
P
6 5
VREG
VBAT
7
GSM850/900OU
T
9
PCSOUT
11
TXEN
3
VBATT
4
VCC
10
8
VCC2
VCC2
12
U402
BAND
2
1
DCSI
N
GND
13
GSM850/900IN
1.5K R413
VOSC
C436 1NF
33PF C406
VOS
C
270
R409
180
R405
R408
270
R404
100PF C419
180
22NF C431
20
6.3V
R403
VDDC
7 XI N 19
XOUT
100UF
C420
RXIP
3
RXQN RXQP
2
17
SCLK
SD I
18
15
SD
O
SENB
16
VDDA
20
6
GND
GND
22
GND
23
GND 24
IO
N
12 11
IO
P
PDNB
14
5
RXIN
4
10 CKN
CKP 9
1
GND
8
GND
13
GN
D
21
U400
R401
0
33nH
L406
VOS
C
L404
C437 10NF
6.8nH
VR
F
C440
100PF
3.9nH L405
VOSC
NC L401
28 25
VDDR
XI N
7
VRF
C402 100PF
16
23
RFLO
N
RFLO
P
24
SCLK
12 13
SD
I
SDO
10 11
SENB
5
VDDD
VDD
I
26 27
IFLO
P
NC
8
NC
14 9
PDNB
20
RFL A
RFL B
19
RFL C
17
RFL D
GND
18
GND
21
GND
GND
22 29
GND GND
30
3
IFLA
IFLB
2
IFLO
N
U403
1
GND
31
GN
D
GN
D
32
GND
4
GND
6
15
TXIP TXQ
N
8 7
TXQ
P
23
VDD1
VDD2
14
VDD3
32
VDD4
26
RFIG
P
RFIPN
18 17
RFIPP
RFLON 13
RFLOP
12
RFOD
24
25
RFOG
6
TXIN
5 2
IO
P
29
L1
L2
28
31
PDNB
RFIDN
20 19
RFID
P
RFIG
N
22 21
GND
GND
30
33
GND
GND
34 GND
35
GND
36
10
IFLO N
IFLO P
9
IO
N
1
U401
CK
N
3
CK
P
4
DIAG1 16
15
DIAG2
11
GND
27
22NF C407
10PF C417
33PF C427
100PF C414
DPCS_PAM_IN
GSM_PAM_IN
TX_BAND_SEL TXPOWER
AF
C
CLK13M_TR CLK13M_MC CLK13M_RF CLK13M_YM
U
TX_EN
PCS_RX_E
N
GSM_TX_EN DCS_TX_EN
GSM_PAM_IN
DPCS_PAM_IN
SI_EN
SERDAT
SDO
SD
O
SI_E
N
TXIN
TXIP
TXQN TXQP
SYN_E
N
RXIP RXI
N
RXQ
P
RXQ
N
CLK13M_RF
SERL
E
SERCLK
SERDAT SERCL
K
SERL
E