COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)viCHAPTER 5 PICK-UP/FEEDING SYSTEMI. OUTLINE..................................................5-1A. Outline................................................5-1II. PICK-UP ASSEMBLY...............................5-3A. Pick-Up from the Cassette.................5-3B. Pick-Up from the Multifeeder Tray....5-16C. Controlling the Pick-Up Motor ..........5-19III. FEEDING/DELIVERY ASSEMBLY.........5-21A. Outline..............................................5-21IV. DUPLEXING UNIT .................................5-22A. Outline..............................................5-22B. Reversing Operation ........................5-25C. Horizontal RegistrationAdjustment .......................................5-26D. Re-Pickup.........................................5-28V. DETECTING JAMS................................5-29A. Detecting Jams in the Printer Unit ...5-29B. Detecting Jams in the DuplexingUnit...................................................5-32VI. DISASSEMBLY/ASSEMBLY ..................5-34A. Pick-Up Assembly ............................5-35B. Delivery Assembly ...........................5-39C. Feeding Assembly............................5-40D. Registration Roller Assembly...........5-40E. Multifeeder Pick-Up Assembly .........5-42F. Multifeeder Tray Pick-Up Roller........5-44G. Multifeeder Tray Separation Pad ......5-45H. Cassette Pick-UP, Feeding, andSeparation Rollers ...........................5-45I. PCBs ................................................5-46CHAPTER 4 IMAGE FORMATION SYSTEMI. OUTLINE..................................................4-1A. Construction.......................................4-1B. Operations..........................................4-2II. FORMING LATENT STATIC IMAGES......4-5A. Outline................................................4-5B. Drum Cartridge Memory ....................4-6C. Checking the Life of the PhotosensitiveDrum ..................................................4-8D. Monitoring the Waste Toner Case......4-9III. DEVELOPMENT ....................................4-10A. Outline..............................................4-10B. Controlling the Developing Rotary ...4-12C. Locking the Developing Rotary ........4-14D. Detecting the Absence of the TonerCartridges ........................................4-14E. Detecting the Level of Color Toner...4-16F. Checking the Presence/Absence of aColor Toner Cartridge.......................4-17G. Checking the Level of Black Toner andthe Presence/Absence of the BlackToner Cartridge ................................4-17IV. TRANSFER............................................4-18A. Outline..............................................4-18B. Locking the Secondary TransferBelt ...................................................4-19C. Controlling the ITD CleaningRoller................................................4-20V. IMAGE STABILIZATION CORRECTIONCONTROL..............................................4-21A. Environmental Changes CorrectionControl .............................................4-21B. Image Density Correction Control (maxi-mum density control)........................4-21C. Image Gradation Correction Control(requires a PS/PCL Board) ..............4-22D. Detecting the Density.......................4-23VI. HIGH-VOLTAGE POWER SUPPLYCIRCUIT.................................................4-24A. Outline..............................................4-24B. High-Voltage PCB 1 .........................4-26C. High-Voltage PCB 2 .........................4-30D. Separation Static Eliminating BiasPCB..................................................4-33VII. OTHER CONTROL MECHANISMS.......4-34A. Developing Rotary Motor Control ....4-34B. Controlling the Cartridge Motor .......4-36C. Controlling the Drum Motor..............4-37VIII. DISASSEMBLY/ASSEMBLY ..................4-38A. Drive System....................................4-39B. Charging, Developing, andCleaning ...........................................4-45C. PCBs ................................................4-53Download free service manual at http://printer1.blogspot.com