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Flow Chart of Troubleshooting
10.
10-
1. Baseband
10-1-1. Power ON
'Power ON' does not work
check the current
consumption
>= 100mA
Check the Voltage
of the Battery
>= 3.3V
Check the pin C152,
C153,C155 of
UCP107 is >= 2.8V
>=2.8V
Check the clock signal at
pin #4 of OSC100
Freq=26Mhz,
Vrms >=300mV
Check the Initial Operation
END
Yes
Yes
No
Yes
Yes
Yes
No
Download again
No
Charge the battery
Check
"Power On"
key?
Yes
Check the clock generation
No
circuit OSC100
10-1
No
check keypad
check
UCP107
and
C153
2
1
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