Samsung GT-S5230 - Flow Chart of Troubleshooting; Power On

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9. Flow Chart of Troubleshooting
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9-1
9-1.
Power On
Check the current consumption
more than
100
mA
'
Power On
'
does not work
Yes
Yes
No
Download again
Check the VBAT
more than
3.3V
No
Check the Battery
Yes
Check the related circuit
No
C300
(
VBAT
)=3.0
V?
Yes
①
Check the U300
No
Check the MEM_1.8V of U300
is more than
1.8V
1.8V
Yes
Check U300
3.0
V_DIG
=3.0V
3.0
V_ANLG
=3.0V
1.2
V_ANLG
=1.2V
②
No
Check the U300 and C352, C319, C333
Yes
③
Yes
Yes
Check the clock
32
KHz_DIGIT
No
Check CLK32K
Freq
=32
KHz
Check the initial operation
END