Canon imageRUNNER ADVANCE C350 series Service Manual page 104

2
Technical Explanation > Image Formation System > Controls > Drum Unit (Developing/Drum)
● Drum Unit Detection
Whether the Drum Unit is installed or not is detected.
Detection timing
1) At power-on, at recovery from sleep mode (of 4 or more hours), when the Front Door
and Right Door are opened/closed.
Detection description
This machine detects the presence/absence of a Drum Unit in the following order.
1) The Drum Unit Memory PCB of the Drum Unit is detected.
If the Drum Unit Memory PCB can be detected, it is judged that the Drum Unit is
attached.
If the Drum Unit Memory PCB cannot be detected, step 2 is executed.
2) It is determined by the DC current monitor value at warm-up rotation.
When the current monitor value is less than the specified value (5 micro A):
Drum Unit absent
When the current monitor value is the specified value (5 micro A ) or higher:
Drum Unit present
Execution time
Within 1 second
2 Technical Explanation > Image Formation System > Controls > Drum Unit (Developing/Drum)
Operation of the host machine
The machine is stopped and "No drum unit" is displayed on the Control Panel at the same
time.
Drum Unit
Memory PCB (Y/M/C/Bk)
(UN12)
Life
Information
DC Controller PCB
(UN04)
1) Drum Unit
detection
2) DC current monitor value
NOTE:
Drum Unit detection may not be executed at times such as at recovery from sleep mode
(of 4 or more hours).
"No drum jam" is detected when a print job is executed with no Drum Unit installed in
the machine.
Related jam codes
00-0B0D: No drum jam
2-61
Drum Unit
F-2-80
2-61