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9-1-2 : Abnormal initial operation (Normal +4.0V voltage source)
Press PWR KEY
Signal on R1006
is exist?
C642 voltage level
= 1.1~1.3V?
C650 voltage level
= 1.8V?
C514 voltage level
= 1.2V?
R400 voltage level
is high after low?
YES
YES
YES
YES
YES
END
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NO
Check OSC601 and
neighboring circuits
NO
Check L601 and neighboring
NO
Check L603 and neighboring
NO
and neighboring circuits
NO
and neighboring circuits
if necessary change the board
9-3
Flow Chart of Troubleshooting
circuits
circuits
Check U501
Check U400
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Table of Contents
Troubleshooting
