资料介绍
D520_Schematics_GH68-10734A-TSHOO-99. Flow Chart of Troubleshooting
9-1.Baseband
9-1-1. Power ON
'Power On' does not work
Check the current consumption Yes Current consumption >= 100mA Yes Check the Vbat Voltage No
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Voltage >=3.3V
No
Yes Check the pin of U100
Pin#J12 >= 2.8V
Check the clock signal at C601
o M
Yes Pin#A13 and pin#A14 =2.8V Yes Freq = 26MHz Vrms >=300mV Vpp
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