Canon CiRC2550, Руководство по обслуживанию

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Chapter 7
7-34
F-7-40
Do not replace drum units with new ones unnecessarily, in order to check function operations during service, etc. The device blows the drum fuse as soon as it
detects a new drum unit and resets the drum life counter to 0. Even if the old drum unit is replaced immediately, the drum life counter will increment as a new drum
unit.
Service Mode:
COPIER > FUNCTION > INSTALL > AINR-OFF
Invalidates drum initialisation that is performed when a new drum unit is installed. Also, the fuse is not blown, as it would usually be after drum initialisation is
completed.
This mode would be used to replace a drum unit temporarily in order to check image quality, for example when trying to trace the cause of a problem.
0: Initialisation carried out for new unit. Fuse blown. (Default)
1: No initialisation for new unit. Fuse not blown.
Further, this service mode should be set to [1] only when necessary for service. After the service is complete, the setting must always be returned to [0].
Start
Detect presence of drum unit
All drum units present?
No
Yes
Detect presence of fuses
Display 'No drum unit' message
All fuses present?
No
Yes
Identify as new drum unit
End
End
Blow fuse
Fuse detection
Fuse blown
Yes
No
Drum life counter reset