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9.
Flow Chart of Troubleshooting
9-1
9-
1. Baseband
9-1-1. Power ON
check the current
consumption
>= 100mA
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'Power ON' does not work
No
Yes
Yes
END
Yes
Check the Initial Operation
Yes
Charge the battery
No
Check the Voltage of
the Battery
>= 3.3V
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No
Check the pin C145,
C146, C148, C149 is
>=2.9V
Check "Power
On with jig
box"
key?
No
check
'END KEY'
of keypad
Yes
1
Check the clock signal at
pin #4 of OSC400
Freq=26Mhz,
Vrms >=300mV
No
Check the clock generation
circuit OSC400
Yes
2