Canon Cassette Module-AE1, Service Manual

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*2: Presence of the cassette is detected when the size switch is pressed.
(When none of the switches are pressed, it is judged as "no cassette".)
Guide Plate
Link Arm
Size Plate
Cassette
Size Switch
Paper Level Detection Control
Paper level inside the cassette is detected by the sensors shown in the following table.
The level of paper in the cassette is detected by the Cassette 2 Lifter Motor, Cassette 2 Paper Sensor, Cassette 2 Lifter Sensor,
and Cassette 2 Paper Level Sensor.
Cassette 2 Paper
Sensor
Cassette 2 Lifter
Sensor
Cassette 2 Paper
Level Sensor
Paper level Display on the Control
Panel
OFF ON OFF* 100% to 50% of the capacity*
OFF ON OFF Approx. 50% to approx. 50
sheets
OFF ON ON Approx. 50 sheets or less
The control that switches the paper level display on the Control Panel is as follows:
• When the icon displayed on the Control Panel shows 3 bars or 2 bars:
The paper level is detected based on the time for which the Cassette 2 Lifter Motor remains ON. Or, the paper level is detected
based on the time from when the Cassette 2 Paper Sensor is turned ON to when the Cassette 2 Lifter Sensor is turned ON.
The paper level during paper feed is detected based on the signal status of the Cassette Paper Level Sensor that changes
as the Cassette Lifter Plate is lifted up.
• When the icon displayed on the Control Panel shows 2 bars or 1 bar:
The icon displayed on the Control Panel changes to "1 bar" when the Cassette 2 Paper Level Sensor is turned ON.
Related service mode
• Adjustment of the threshold value for detection of the Cassette X paper level (Lv.2):
COPIER > ADJUST > CST-ADJ > CST-VLMX
2. Technical Explanation
9