5. Flow chart of trouble shooting
5-1 Power ON
Flow chart of trouble shooting
5-1
’POWER ON’ does not work
Charge the Battery
Check the Battery Voltage
is more than 3.2V
No
Yes
Yes
Check U100 and the path from +VBATT
to M100
The node
between D100 and M100 = 3V
No
Yes
U106 pin 1,4,10 > 3.2V
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 R646
Check the clock generation circuit
(related to U613 and Q604)
No
Yes
Yes