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9. Flow Chart of Troubleshooting
9-1.Baseband
9-1-1. Power ON
'Power On' dose not work
Check the Vbat more
Check the VLDO7_1.8V
of U300 is more than 1.
Freq=13MHz, Vpp>0.4V
Check the initial operation
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YES
Check the current
consumption more
than 100mA
YES
than 3.3V
YES
8V
YES
Check VCCD_1.8V
of U307=1.8V
YES
Check VRF of
U300=2.9V
YES
Check C130
YES
YES
END
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NO
NO
NO
Check U300 and C315
NO
NO
Check U300 and C317
NO
Check the clock C130
9-1
Down load again
Change the Battery
Check C340 of U307
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