Canon CP660 Service Manual page 8

CHAPTER 4 IMAGE FORMATION SYSTEM
I. OUTLINE..................................................4-1
A. Construction.......................................4-1
B. Operations..........................................4-2
II. FORMING LATENT STATIC IMAGES......4-5
A. Outline................................................4-5
B. Drum Cartridge Memory ....................4-6
C. Checking the Life of the Photosensitive
Drum ..................................................4-8
D. Monitoring the Waste Toner Case......4-9
III. DEVELOPMENT ....................................4-10
A. Outline..............................................4-10
B. Controlling the Developing Rotary ...4-12
C. Locking the Developing Rotary ........4-14
D. Detecting the Absence of the Toner
Cartridges ........................................4-14
E. Detecting the Level of Color Toner...4-16
F. Checking the Presence/Absence of a
Color Toner Cartridge.......................4-17
G. Checking the Level of Black Toner and
the Presence/Absence of the Black
Toner Cartridge ................................4-17
IV. TRANSFER............................................4-18
A. Outline..............................................4-18
B. Locking the Secondary Transfer
Belt ...................................................4-19
C. Controlling the ITD Cleaning
Roller................................................4-20
CHAPTER 5 PICK-UP/FEEDING SYSTEM
I. OUTLINE..................................................5-1
A. Outline................................................5-1
II. PICK-UP ASSEMBLY...............................5-3
A. Pick-Up from the Cassette .................5-3
B. Pick-Up from the Multifeeder Tray....5-16
C. Controlling the Pick-Up Motor ..........5-19
III. FEEDING/DELIVERY ASSEMBLY.........5-21
A. Outline..............................................5-21
IV. DUPLEXING UNIT .................................5-22
A. Outline..............................................5-22
B. Reversing Operation ........................5-25
C. Horizontal Registration
Adjustment .......................................5-26
D. Re-Pickup.........................................5-28
V. DETECTING JAMS................................5-29
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V. IMAGE STABILIZATION CORRECTION
CONTROL..............................................4-21
A. Environmental Changes Correction
Control .............................................4-21
B. Image Density Correction Control (maxi-
mum density control)........................4-21
C. Image Gradation Correction Control
(requires a PS/PCL Board) ..............4-22
D. Detecting the Density.......................4-23
VI. HIGH-VOLTAGE POWER SUPPLY
CIRCUIT.................................................4-24
A. Outline..............................................4-24
B. High-Voltage PCB 1 .........................4-26
C. High-Voltage PCB 2 .........................4-30
D. Separation Static Eliminating Bias
PCB..................................................4-33
VII. OTHER CONTROL MECHANISMS.......4-34
A. Developing Rotary Motor Control ....4-34
B. Controlling the Cartridge Motor .......4-36
C. Controlling the Drum Motor..............4-37
VIII. DISASSEMBLY/ASSEMBLY ..................4-38
A. Drive System....................................4-39
B. Charging, Developing, and
Cleaning ...........................................4-45
C. PCBs ................................................4-53
A. Detecting Jams in the Printer Unit ...5-29
B. Detecting Jams in the Duplexing
Unit...................................................5-32
VI. DISASSEMBLY/ASSEMBLY ..................5-34
A. Pick-Up Assembly ............................5-35
B. Delivery Assembly ...........................5-39
C. Feeding Assembly............................5-40
D. Registration Roller Assembly...........5-40
E. Multifeeder Pick-Up Assembly .........5-42
F. Multifeeder Tray Pick-Up Roller........5-44
G. Multifeeder Tray Separation Pad ......5-45
H. Cassette Pick-UP, Feeding, and
Separation Rollers ...........................5-45
I. PCBs ................................................5-46
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)