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SGH-E810 Flow Chart of Troubleshooting
2-
12
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TRANSMITTER & RECEIVER
C404
47PF
0.75PF
C417
33PF
C433
C408
0.5PF
R406
220
C403
10NF
33PF
C430
2.2PF
C414
100K
L401
6.8nH
R401
R402
10
33PF
C435
820
R403
2.2PF
C416
15
VRF
47PF
C418
R405
2.7nH
L402
NC
L403
OUT
3
4
OUT
VPAC
VRF
U402
G
2
G
5
1
IN
NC
VBAT
C400
L404
C406
2.2PF
6.8nH
27nH
L405
C434
33PF
C419
0.75PF
1UF
C429
OUT
CN400
G1
3
G2
4
1
IN
2
2
L407
15nH
G
G
6
7
G
G
9
12
G
G
13
14
G
11
VC1
VC2
U401
8
ANT
1
DCS_RX
3
DCS_TX
EGSM_RX
10
EGSM_TX
5
4
R407
270
100NF
C420
22PF
C405
C411
270PF
ANT_GND
C407
0.75PF
25
G
1
IN
OUT
3
4
OUT
U403
G
820
R404
6.3V
100UF
C402
R400
0
27
X
O
U
T
_
P
D
N
10
12
_
S
E
N
5
TXIN
TXIP
4
7
TXQN
TXQP
6
V
D
D
9
32
V
D
D
26
X
E
N
8
X
IN
R
F
O
G
23
3
RXIN
RXIP
2
RXQN
1
R
X
Q
P
28
13
S
C
L
K
S
D
I
14
11
S
D
O
GND
19
RFIDN
18
RFIDP
21
RFIGN
RFIGP
20
17
RFIPN
RFIPP
16
22
R
F
O
D
D
IA
G
2
15
GND
29
G
N
D
30
G
N
D
G
N
D
31
33
G
N
D
34
G
N
D
GND
35
36
U404
24
D
IA
G
1
25
C412
33PF
6
5
VREG
1NF
C413
7
GSM850/900IN
9
GSM850/900OUT
PCSOUT
11
TXEN
3
VBATT
4
V
C
C
10 8
V
C
C
2
V
C
C
2
12
VRAMP
U400
RF3140
BAND
21
DCSIN
GND
13
C410
33PF
33PF
C409
ANT1
C431
22NF
C401
47PF
22PF
C415
C421
33PF
ANT
SERLE
SERCLK
SERDAT
GSM_LNA_IN_P
GSM_LNA_IN_N
DCS_LNA_IN_P
DCS_LNA_IN_N
TX_BAND_SEL
DCS_TX_EN
GSM_TX_EN
DCS_LNA_IN_P
DCS_LNA_IN_N
GSM_LNA_IN_N
GSM_LNA_IN_P
SI_EN
RXQP
GSM_PAM_IN
DCS_PAM_IN
CLK13M_R
TXIN
TXIP
TXQN
TXQP
TXPOWER
GSM_PAM_IN
DCS_PAM_IN
TX_EN
RXIP
RXIN
RXQN