Service Mode Operation Procedures - Canon MP640 Service Manual

4-2. Service Mode

(1) Service mode operation procedures

Use the Service Tool on the connected computer.
1) Start the machine in the service mode.
i. With the machine power turned off, while pressing the Stop button, press and hold the ON button. (DO NOT release the
buttons.)
ii. When the Power LED lights in green, while holding the ON button, release the Stop button. (DO NOT release the
ON button.)
iii. While holding the ON button, press the Stop button 2 times, and then release both the ON and Stop buttons. (Each
time the Stop button is pressed, the Alarm and Power LEDs light alternately, Alarm in orange and Power in
green, starting with Alarm LED.)
iv. When the Power LED lights in green and the machine displays "Service Mode Idle," the machine is ready for the
service mode operation.
2) Start the Service Tool on the connected computer.
i. When a button is clicked in the Service Tool dialog box, that function is performed. During operation of the selected
function, all the Service Tool buttons are dimmed and inactive.
ii. When the operation is completed, "A function was finished." is displayed, and another function can be selected.
iii. If a non-supported function is selected, "Error!" is displayed. Click OK in the error message dialog box to exit the
error.
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