User Guide

SAMSUNG Proprietary-Contents may change without notice
SGH-D720 Flow Chart of Troubleshooting and Circuit Diagrams
2-10
This Document can not be used without Samsung's authorization
2-1-3. Sim Part
YES
YES
YES
YES
Check the SIM
connector's
(SIM500)
Check the circuit related to
U500
NO
resolder or change
SIM500
NO
Check the relate d circuit of
SIM500
NO
Phone can't access
SIM card
Check the circuit around
U500 output
and voltage supply circuitry
END
Check the pin 1 of
SIM500
Voltage = 3V
Check the circuit around SIM500
input circuitry
Check the related circuit of
U500
NO
C502
C505
VCCD
7
GG
89
GG
10
SIM500
11
22
33
4
4
5
5
6
6
C507
C506
H11
K12
1
O
I
_
D
D
V
UP_IO
R10
UP_RST
3
J
1
D
D
V
J13
VDD12
3
M
2
D
D
V
6
N
3
D
D
V
VDD34
C11
0
1
C
5
D
D
V
3
1
B
7
6
D
D
V
K14
SIM_CLK
J11
SIM_IO
K11
SIM_RST
N9
UP_CLK
P10
1
1
F
R
U
C
H
_
D
N
G
5
1
B
1
C
S
P
_
D
N
G
5
1
K
2
C
S
P
_
D
N
G
8
E
Q
D
N
G
C510
VBAT
C503
C509
C508
SIMRST
SIMCLK
SIMDATA