CHAPTER 5 TROUBLESHOOTING
B. Dcon Check
1. LED
Checks the operation of each of the
LEDs.
Figure 5-225
1) CIS Led
Checks the reading unit LED light. Open
the upper unit and press the
corresponding button to light the LED.
Press the button again to turn the LED
off.
2) Panel Led
Checks that the panel unit LED lights.
Select [DFR] to light the DFR LED.
Select [Error] to make the Job No. LEDs
flash.
Select the buttons again to return to the
original state.
2. Sensors and Buttons
Checks the operation of the sensors and
buttons.
When the sensor detects its target, the
corresponding mark lights.
The display screen is divided into “Upper
Unit”, “Base Unit”, “Rear”, and “Panel Unit”.
These are displayed by selecting the
corresponding tabs.
1) Upper Unit
Pre-registration
Ultrasonic
Post-registration
Eject
Figure 5-226
Open the upper unit, place the
appropriate paper in the sensor area,
and close the upper unit. The mark lights
up when the paper is detected.
For the ultrasonic sensor, the double
circle mark lights when there are two or
more sheets of paper.
Note:
Although the mark lights up if the upper
unit is open, this does not confirm the
correct operation. You should confirm
the operation by actually moving the
unit as described.
5-16
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CANON ELECTRONICS INC. 2011 CANON DR-M140 FIRST EDITION
