Table of Contents
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5. Flow chart of trouble shooting
5-1 Power ON
'POWER ON' does not work
Check the Battery Voltage
is more than 3.2V
between D303 and BAT300 = 3V ?
U410 pin 1,4,10 > 3.2V
U306,U308 pin 3 = "H"?
U306, U308 pin5 = 3V ?
Check for the clock signal at R107
Check the initial operation
5-1
Yes
Yes
The node
Yes
Yes
Yes
Yes
Yes
END
No
Charge the Battery
No
Check U303 and the path from +VBATT
to BAT300
No
Check the circuit related to U410
No
Check the circuit related to U306, U308
No
Check U306, U308 and related circuit
No
Check the clock generation circuit
(related to U100 and Q100)
Flow chart of trouble shooting
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