COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 4MECHANICAL SYSTEMI. EXTERNALS ............................................. 4-1A. External Covers ................................... 4-1B. Control Panel ....................................... 4-2C. Removing the Display Panel ............... 4-2D. Fan ...................................................... 4-3E. Counter ................................................ 4-4II. DRIVE SYSTEM ........................................ 4-5A. Scanner Drive System ......................... 4-5B. Lens Drive Assembly ......................... 4-10C. Main Motor ......................................... 4-14III. PICK-UP/FEEDING SYSTEM ................. 4-15A. Pick-Up Assembly ............................. 4-15B. Multifeeder Assembly ........................ 4-17C. Registration Roller Assembly ............ 4-20D. Feeding Assembly ............................. 4-22E. Delivery Assembly ............................. 4-22F. Duplexing Assembly .......................... 4-23G. Cassette Unit ..................................... 4-24H. Paper Deck Pedestal-K1 ................... 4-27IV. EXPOSURE SYSTEM ............................. 4-34A. Illuminating Assembly ........................ 4-34V. CHARGING SYSTEM ............................. 4-38A. Drum Unit .......................................... 4-38B. Primary Charging Assembly .............. 4-39C. Transfer Charging Assembly ............. 4-40D. Drum Heater ...................................... 4-41VI. DEVELOPING SYSTEM ......................... 4-42VII. FIXING SYSTEM ..................................... 4-45VIII .ELECTRICAL ........................................... 4-50A. DC Controller PCB ............................ 4-50B. Composite Power Supply PCB ......... 4-50C. AE Sensor PCB ................................. 4-511. Before disassembly or reassembly work, disconnect the heating (if a heater is installed)and main body power cord(s).2. Group the screws by type (length and diameter) and location.3. The fixing screw for the grounding wire and varistors is fitted with a washer to ensureelectric continuity; be sure to use the washer for reassembly.4. If possible, avoid operating the machine with any of its parts removed.5. Unless otherwise noted, reassembly is the reverse of disassembly.