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9. Flow Chart of Troubleshooting
9-1. Power On
9-1-1. PDA Part
Insert Power
Check pin 2 of V_BAT in
U402
is more than 3.1V
Check followings :
C432 is 1.8V
C444 is 3.0V
C440 is 3.0V
Check C437 is 1.2V
Check pin 1 of TR400
Check C445, C431 is 1.2V
Check pin 6 of U800 is 'H'
Check Other Power Circuit
NG
Yes
Yes
Yes
is 'H'
Yes
Yes
Yes
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No
Change the Battery &check ZD714
No
Check the U404
and the related cuircuit
No
Check the U404
and the related cuircuit
No
Check the UCP800
No
Check the U404
and the related cuircuit
No
Check the U800
and the related cuircuit
9-1
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