Jam Detection; Outline; Pickup Delay Jam; Pickup Stationary Jam - Canon imageCLASS LBP6780dn Service Manual

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Technology > Pickup Feeding System > Jam Detection > Internal stationary jam 1

Jam Detection

Outline

■
The printer uses the following sensors to detect the presence of printing paper and to check
whether the paper is being fed correctly or has jammed:
• Face-down tray media full sensor (PS4)
• TOP sensor (PS215)
• Fixing delivery sensor (PS2)
• Media width sensor (PS225)
• Duplex media feed sensor (PS502)
• PF media feed sensor (PS8008)
PS4
PS2
PS502
2 Technology > Pickup Feeding System > Jam Detection > Internal stationary jam 1
PS215
PS225
PS8008
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The printer detects the following jams:

1. Pickup delay jam 1

2. Pickup stationary jam

3. Delivery delay jam

4. Delivery stationary jam

5. Internal stationary jam 1

6. Internal stationary jam 2

7. Door open jam

8. Fixing paper wrapping jam

9. Duplex re-pickup jam

■ Pickup delay jam 1
In case of picking up paper from the Multi-purpose Tray or Cassette or feeding the 2nd side
of paper at duplex print, when the leading edge of paper is not detected within the specified
period of time by the TOP Sensor, it is judged as a pickup delay jam.
■ Pickup stationary jam
When the trailing edge of paper is not detected by the TOP Sensor even if the specified
period of time is elapsed after the leading edge of paper is detected by the TOP Sensor, it is
judged as a pickup stationary jam.
■ Delivery delay jam
When the leading edge of paper is not detected within the specified period of time by the
Fixing Delivery Sensor after the leading edge of paper is detected by the TOP Sensor, it is
judged as a delivery delay jam
■ Delivery stationary jam
When the trailing edge of paper is not detected within the specified period of time by the
Fixing Delivery Sensor after the trailing edge of paper is detected by the TOP Sensor, it is
judged as a delivery stationary jam.
■ Internal stationary jam 1
When either TOP Sensor, Fixing Delivery Sensor, Paper Width Sensor or Duplex Sensor
detects presence of paper at the time of warm-up rotation, it is judged as a internal stationary
jam 1.
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