10. Flow Chart of Troubleshooting
10-1.Baseband
10-1-1. Power ON
'Power On' does not work
Check the current consumption
Yes
| Current consumption | No | ||||
| >= 100mA |
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| Check the Vbat Voltage |
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| No |
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| Voltage >=3.3V |
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| Check the pin of U107 |
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Download again
Charge the Battery
Pin#J12 >= 2.8V
Yes
No
Check U107 and C173
①
Pin#A13 and
pin#A14 =2.8V
Yes
Check the clock signal at pin#8 of U102
No | pin#G11 = | No |
| 1.8V |
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| Yes |
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③
Check U107 and C174
②
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| Freq = 13MHz | No | ||||||
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| Vrms >=300mV |
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| Vpp≒ 900mV |
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Check the initial operation |
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Check the clock generation circuit
(related to OSC100)
④
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