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5. Flow Chart of Troubleshooting and Circuit Diagrams
5-1 Power ON
'POWER ON'does not work
Check the Battery Voltage
pressed, the voltage of "D110 pin1"
Check for the clock signal at R516
Check the initial operation
5-1
Yes
is more than 3.2V
Yes
When the "END" key is
3.6V?
Yes
U102
U108
pin 5
2.5 V ?
Yes
U100 pin 5
3.3 V ?
U104 pin 5
3.0 V ?
Yes
Yes
END
No
Charge the Battery
No
Check the Dome sheet
No
Check the circuit related to U102, U108
No
Check U100, U104 and related circuit
No
Check the clock generation circuit
(related to U504 and Q500)
Flow Chart of Troubleshooting and Circuit Diagrams
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