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SGH-D720 Flow Chart of Troubleshooting and Circuit Diagrams
2-1-3. Sim Part
Phone can't access
SIM card
Check the pin 1 of
SIM500
Voltage = 3V
YES
Check the SIM
connector's
(SIM500)
YES
Check the circuit around SIM500
input circuitry
YES
Check the circuit around
U500 output
and voltage supply circuitry
YES
END
VCCD
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NO
NO
NO
NO
VBAT
C502
C503
C505
VDD34 C11
J13
VDD12
N9
UP_CLK
SIMCLK
R10
UP_RST
SIMRST
P10
UP_IO
SIMDATA
J11
SIM_IO
K11
SIM_RST
K14
SIM_CLK
K12
H11
SAMSUNG Proprietary-Contents may change without notice
Check the circuit related to
U
500
resolder or change
SIM500
Check the related circuit of
SIM500
Check the related circuit of
U500
SIM500
6 6
1
1
5
5
2
2
4 4
3
3
G G
G G
7
8 9
10
C506
C509
C510
2-10
C507
C508
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