Canon imagePRESS 1135 Series Service Manual page 106

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Technology > Image Formation System > Various Types of Control > Drum-related
■ Drum-related
● Drum Homeposition Detection
Improves the detection accuracy of the patch image density by forming the patch image on
the same position of the photosensitive drum.
Timing
1) At the time of execution of D-max.
2) At the time of execution of D-half.
Description
1) The drum HP sensor (PS127) detects the HP detection flag on the photosensitive drum
shaft.
2) Patch image is formed on the photosensitive drum.
Related Error Code
• Drum motor error
E012-0010: While driving, lock comes off 5 times consecutively
E012-0011: During standby, off-timing lock is detected.
• Drum HP detection error
E070-0001: Home position is not detected when the photosensitive drum is rotating.
The host machine stops. Massage and animation are displayed.
● Drum Heater Control
Keep the temperature of the photosensitive drum at a specified level, and stabilize the
potential characteristics of charging and exposure, etc. so that there is no environment
difference.
Timing
1) When the main power switch is turned on.
2) When the main power switch is turned on AND the environment heater switch is turned on.
Description
Warm up the photosensitive drum with the sheet-type drum heater (H1) attached inside of the
photosensitive drum.
MEMO :
When the drum unit is replaced, apply the barrierta IMI on the sliding unit of the drum
heater contact point.
2 Technology > Image Formation System > Various Types of Control > Drum-related
Drum unit
Drum heater
<Back View>
2-58
F-2-82
Environment
heater switch
F-2-83
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