GX20
2 – 62
CONFIDENTIAL
15. SIM Card is not recognized.
Can SIM card be recognized after replacement?
SIM card defective or undesignated SIM card used.
2.8 V Output at Q208 5 pin?
IC104 defective.
2.85 V Output at SIM power supply IC202 18 pin?
IC202 or Q208 defective.
Do Jumper (IC104 196 pin to CN202 24 pin) and jumper
(IC104 177 pin to CN202 25 pin)regularly output pulse
waves?
IC104 defective.
Does TP301 (SIM power source) output 2.85 V?
Are appearance and mounting of jumper (CN306 17 pin to
CN301 1 pin) and C303 properly given?
Relay FPC_A or CN306 and CN202 defective.
Or jumper (CN306 17 pin to CN301 1 pin) and C303 defective.
Do CN301 3 pin and 6 pin regularly output pulse waves?
Are appearance and mounting of jumper (CN306 14 pin to
CN301 6 pin) and R305 properly given?
Relay FPC_A or CN306 and CN202 defective.
Or jumper (CN306 14 pin to CN301 6 pin) and R305 defective.
Does SIM reset signal CN301 2 pin output 3.0 V?
Are appearance and mounting of R363 properly given?
Relay FPC_A or CN306 and CN202 defective.
Or R363 and IC104 defective.
Are appearance and mounting of SIM card connector (CN301)
properly given?
SIM card connector (CN301) defective or defective mounting.
IC104 defective.
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES