User Guide

5. Flow chart of trouble shooting
5-1 Power ON
5-1 Flow chart of trouble shooting
'POWER ON' does not work
Charge the Battery
Check the Battery Voltage
is more than 3.4V
No
Yes
Yes
Check U100 and the path from +VBATT
to M100
The node
between D100 and M100 = 2.8V
No
Yes
U106 pin 2,3,4 > 3.4V
Check the circuit related to U106
No
END
Yes
Check the initial operation
U102, U105 pin3 = 3V ?
Check U102, U105 and related circuit
No
Check for the clock signal at R613
Check the clock generation circuit
(related to U613 and Q604)
No
Yes
Yes