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9. Flow Chart of Troubleshooting
9-
1
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9-1. Power On
Check the current consumption
more than 100mA
' Power On ' does not work
Yes
Yes
No
Download again
Check the VBAT
more than 3.3V
No
Check the Battery
Yes
Resolder
D800
No
Check
D800
DC Resistance,solder
Yes
①
Replace
U400
No
VDDE
C418
=1.8V ?
VADC
C417
=2.65V ?
VRAD
C415
=2.8 V ?
Yes
②
Yes
Yes
Check the clock
OSC400 ,
C412 , C413
No
Check CLK32K
R403
= 32KHz
Check the initial operation
END
Check the pin #15 of U102
Check the pin #1 of
OSC100
Yes
No
Check the U102 ,
OSC100
③
④