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SGH-E316 Flow Chart of Troubleshooting and Circuit Diagrams
5-
3
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3. Sim Part
(Picture 1)
Check the Voltage at
pin#1
of CN100 ≥ 2.8V
"Insert SIM" is displayed on the LCD
Check the U102
Check the SIM Card
END
No
Yes
Yes
Yes
No
Check the U302
Is there any Signals
pin#2, #3, #4 of CN100?
Check the SIM
connector's(CN100)
connection to SIM card
Resolder or change CN101
Yes
No
SI-LAB
C412
100PF
10K,1%
R428
XTAL2
6
8
X
T
A
LE
N
_
P
D
N
26
V
D
D
14
V
D
D
32
30
V
D
D
7 XAFC
9
X
D
R
V
E
N
27
X
E
N
28
X
O
U
T
5 XTAL1
17
RFIPN
RFIPP
16
22
R
F
O
D
23
R
F
O
G
12
S
C
LK
13
S
D
I
10
S
D
O
11
S
E
N
B
GND
35
36
GND
NC
37
38
NC
19
RFIDN
18
RFIDP
21
RFIGN
20
RFIGP
1 BQP
24
D
IA
G
1
D
IA
G
2
25
15
GND
29
G
N
D
31
G
N
D
GND
33
GND
34
4 BIN
3 BIP
BQN
2
U403
VRF
100PF
C414
C413
100PF
C401
33PF
C454
10NF
C407
22NF
C400
47PF
GND1
2
4
GND2
1
HOT
HOT
3
OSC402
VRF
AFC
S
E
R
LE
S
E
R
D
A
T
S
E
R
C
LK
GSM_LNA_IN_P
GSM_LNA_IN_N
RTX_QP
RTX_QN
RTX_IP
RTX_IN
PCS_LNA_IN_P
PCS_LNA_IN_N
R
F
_
E
N
1
3M
H
Z
_B
B
X
O
E
N
A
_
O
U
T
PCS_PAM_IN
GSM_PAM_IN