Canon imageRUNNER C1335 Series Service Manual page 77

2
Technical Explanation > Image Formation System > Controls > Drum Unit (Developing/Drum)
● Drum Unit Life Detection
Life of the Drum Unit (Photosensitive Drum) is detected.
This machine does not have a Photosensitive Drum film thickness detection mechanism
so the change in the film thickness is calculated by the rotation time of the Photosensitive
Drum + time that the primary charging DC bias is applied.
Detection timing
• At power-on
• At every print
• At recovery from sleep mode
Detection description
1) The count value for the drum life is calculated by the rotation time of the Photosensitive
Drum + time that the primary charging DC bias is applied as well as the time that the
developing AC bias is applied.
2) The count value calculated in step 1 of "Control description" is added to the drum
count value stored in the Drum Unit Memory PCB of the Drum Unit.
NOTE:
The life (displayed in %) can be checked by the following service mode:
None
Prior delivery alarm
Timing • Y/M/C/K-DRM-LF (*1)
= 100% (initial value)
The value can be
changed in service
mode.(*2)
Detected to (location) Drum Unit Memory PCB Drum Unit Memory PCB Drum Unit Memory PCB
Message (Operation *6
of the host machine) (Continuous printing is
enabled.)
Alarm code 40-0070 (Y)
40-0071 (M)
40-0072 (C)
40-0073 (Bk) (*4)
*1: (Lv.1) COPIER > COUNTER> LF > Y/M/C/K-DRM-LF
*2: (Lv.1) COPIER > OPTION > FNC-SW > D-DLV-CL/BK
*3: The value can't be changed. Display/Hide can be switched in (Lv.2) COPIER > OPTION >
USER > P-CRG-LF (0: Hide)
2 Technical Explanation > Image Formation System > Controls > Drum Unit (Developing/Drum)
Display to prompt Completion of
replacement replacement
• Y/M/C/K-DRM-LF (*1) When the Drum Unit is
= 170% detected
*3
*7 None
(Host machine is
stopped.)
None 35-0070 (Y)
35-0071 (M)
35-0072 (C)
35-0073 (Bk) (*5)
*4: During the period from when a pre-toner low alarm is sent to when a replacement
completion alarm is sent, the next pre-toner low alarm is not sent. It is printed in JAM/ERR
LOG REPORT (ALARM-2).
*5: It is printed in JAM/ERR LOG REPORT (ALARM-3).
*6:
*7:
T-2-24
2-46
F-2-63
F-2-64
2-46