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 U504
(Serial EEPROM) and data stored in it
Yes
Phone can't access SIM card
Yes
Содержание SGH-N620
Страница 2: ...Samsung Electronics Co Ltd Printed in Korea 12 2001 Rev 1 0 GH68 02583A ELECTRONICS ...
Страница 36: ...Flow chart of trouble shooting 5 10 C532 U501 R525 R527 C561 C560 MIC VX 1P C553 R530 VX 1N R531 C538 V C C ...
Страница 43: ...5 17 Flow chart of trouble shooting R215 1K 100K R217 1 3 2 Q201 MMBT2222AWT1 BACKLIGHT B_LIGHT ...