10.
Flow Chart of Troubleshooting
10-1
10-
1. Baseband
10-1-1. 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
check keypad
No
Check the pin C152,
C153,C155 of
UCP107 is >= 2.8V
>=2.8V
Check
"Power On"
key?
No
check
UCP107
and
C153
Yes
1
Check the clock signal at
pin #4 of OSC100
Freq=26Mhz,
Vrms >=300mV
No
Check the clock generation
circuit OSC100
Yes
2