Flow chart of trouble shooting
5-7
5-4 Sim Part
U300 pin4,6 = 3V ?
U300 pin5 = "H" ?
Check the circuit related to U102
END
Replace the PBA
Yes
No
No
U300 pin2,3 = 3V ?
CN310 pin1,7 = 3V ?
Replace U300
Resoldering CN301 and check open
connection from U300 to CN301
Yes
Yes
No
No
After Power ON,
Check SIMCLK Signal on CN310 pin 1
in a few second
After SIM card insert,
CN310 pin 2 = "H"(SIMRST) ?
Replace the PBA
Replace the PBA
Yes
Yes
No
No
Check the circuit around U520
(Serial EEPROM) and data stored in it
Yes
Phone can't access SIM card
Yes
Содержание SGH-N625
Страница 2: ...Samsung Electronics Co Ltd Printed in Korea 08 2002 Rev 1 0 GH68 03123A ELECTRONICS ...
Страница 9: ...PCB Diagrams 2 1 2 PCB Diagrams 2 1 Main Top ...
Страница 10: ...PCB Diagrams 2 2 2 2 Main Bottom ...
Страница 27: ...5 Flow chart of trouble shooting 5 1 Power ON 5 1 Flow chart of trouble shooting ...
Страница 30: ...Flow chart of trouble shooting 5 4 VCC VCC R509 C526 SIMPWDN_BOOT F_WP SYSRST GPIO3 DTR1 F ...
Страница 35: ...5 9 Flow chart of trouble shooting 5 5 Microphone Part ...
Страница 36: ...Flow chart of trouble shooting 5 10 C532 U501 R525 R527 C561 C560 MIC VX 1P C553 R530 VX 1N R531 C538 VCC ...
Страница 43: ...5 17 Flow chart of trouble shooting R215 1K 100K R217 1 3 2 Q201 MMBT2222AWT1 BACKLIGHT B_LIGHT ...
Страница 44: ...Flow chart of trouble shooting 5 18 5 10 Melody Part ...