Canon 1120 Service Manual page 10

C. Controlling the Attraction
Charging Mechanism and
Transfer Charging Current .. 6-20
1. Operations..................... 6-20
D. Controlling the Separation
Charging Current ................ 6-21
1. Operation ...................... 6-21
E. Controlling the External/Internal
Static Eliminating Current ... 6-23
1. Operation ...................... 6-23
F. Controlling the Post-Cleaning
Charging Current ................ 6-24
1. Operations..................... 6-24
G. Controlling the Temperature of
the Photosensitive Drum ..... 6-25
1. Control........................... 6-25
2. Controlling the Power
Using the Environment
Switch SW6 ................... 6-25
H. Controlling the Primary Charging
Wire Cleaning Mechanism .. 6-27
1. Operations..................... 6-27
2. Conditions for
Operation ...................... 6-27
IV. DEVELOPING
ASSEMBLIES .......................... 6-28
A. Outline ................................. 6-28
B. Locking the Developing
Assembly ............................. 6-29
C. Controlling the Concentration of
Color Toner .......................... 6-31
1. Outline ........................... 6-31
2. Measuring the
Concentration of Color
Toner on the Developing
Cylinder Assembly ........ 6-32
3. Controlling the Color
Toner Concentration
Measurement Mechanism
of the Photosensitive
Drum ............................. 6-33
4. Sequence of
Measurement ................ 6-34
D. Controlling the Concentration of
Black Toner .......................... 6-35
1. Outline ........................... 6-35
2. Controlling the Supply of
Black Toner .................... 6-35
2. Controlling the Supply of
Black Toner .................... 6-35
3. Measuring the Concentration
of Black Toner
(patch detection) ........... 6-36
4. Detecting Dirt on the
Window ......................... 6-38
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5. Sequence of Operations
6. Error Code (E020)
E. Supplying Toner .................. 6-48
V. PHOTOSENSITIVE DRUM
CLEANER ASSEMBLY ............ 6-49
A. Outline ................................. 6-49
B. Controlling the Reciprocating
Mechanism of the Cleaning
Blade ................................... 6-50
C. Controlling the Collection of
Waste Toner ........................ 6-50
1. Checking the Waste
2. Detecting a Waste Toner
VI. DISASSEMBLY/ASSEMBLY .... 6-52
A. Photosensitive Drum
Assembly ............................. 6-53
1. Construction .................. 6-53
2. Removing the
3. When Replacing the
4. Cleaning the
5. Removing the Drum
6. Removing the Drum
B. Pre-Exposure Lamp ............ 6-61
1. Removing the
C. Charging Assembly ............. 6-62
1. Outline ........................... 6-62
2. Removing the Primary
3. Removing the Grid
4. Replacing the Wire
5. Removing the Post-Cleaning
6. Adjusting the Height of the
D. Developing
Assemblies .......................... 6-65
1. Construction of the Y/M/C
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
(measurement) ............. 6-39
Related to Control of Toner
Concentration ................ 6-40
Toner Case (full) ............ 6-50
Feedscrew Lock
Condition ....................... 6-51
Photosensitive Drum ..... 6-53
Photosensitive Drum ..... 6-57
Photosensitive Drum ..... 6-59
Heater ........................... 6-60
Heater Brush ................. 6-61
Pre-Exposure
Lamp Unit ...................... 6-61
Charging Assembly ....... 6-62
Plate .............................. 6-62
Cleaning Pad of the
Primary Charging
Assembly ....................... 6-63
Charging Assembly ....... 6-64
Charging Wire ............... 6-64
Developing Assembly.... 6-65