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Flow Chart of Troubleshooting
7-6
7-3. SIM Part
Yes
After SIM card insert,
CN401 pin 2 = "H(USIM_RST)"?
Replace PBA
No
Yes
After Power ON,
Check SIM_CLK Signal on
CN401 pin3 in a few second
It is 3.84MHz?
Check the 32.768KHz OSC(XTAL 401)
&
19.2Mhz(OSC201)
No
Yes
Yes
Yes
No
END
Check the SIM Card
Check the SIM POWER
Phone can't access SIM Card
CN401 pin 1 = "H"?