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3-1
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3. Chart of Troubleshooting
3-1.Baseband
3-1-1. Power ON
'Power On' dose not work
Check the current
consumption more than
100mA
Check the
Vbat more than 3.3V
Check the VLDO7_1.8V of
UCD301 is more than 1.8V
Check VCCD_1.8V of
U302=1.8V
Check VRF of UCD301=2.9V
Check Pin #8 of U101
Freq=13Mhz, Vpp>0.4V
Check the initial
operation
END
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Change the Battery
Check UCD301 and C316
Check C384 of U302
Check UCD301 and C315
Check U101
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO