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10. Flow Chart of Troubleshooting
10-1.Baseband
10-1-1. Power ON
'Power ON' Does not work
Check the current consumption
Current consumption
≥ 100mA ?
Check the V bat. voltage
Voltage ≥ 3.3V ?
Check the pins of U102
C119 ≥ 1.8V ?
C116 and C121 = 2.8V?
Check the clock signal
at pin #1 of OSC700
Freq.=13MHz,Vrms ≥ 300mV
Check the Initial operation
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YES
YES
YES
YES
YES
END
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NO
NO
NO
NO
C113=1.5V?
YES
NO
10-1
Down load again
Charge the Battery
Check U102 and C119
NO
Check U102 and C113
Check the clock generation
circuit (OSC700, U104 pin#4)
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