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Level 3 Repair
8-6
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8-3-1. Power On
END
Check the current consumption
more than 100mA
' Power On ' does not work
Download again
No
Yes
Check the VBAT
more than 3.3V
Check the Battery
No
Yes
C300(VBAT) = 3.0V?
Check the related circuit
No
Yes
Yes
Check U300
3.0V_DIG = 3.0V
3.0V_ANKG = 3.0V
1.2V_ANLG = 1.2V
Check the U300 and C324, C325, C333
Yes
Check the CLK32K
Freq = 32KHz
Check the clock 32kHz_DIGIT
Yes
Check the initial operation
Yes
Yes
Check the MEM 1.8V of
U300 is more than 1.8V
Check the U300 and L301
No
No
No