Technical information

CHAPTER 4
MECHANICAL SYSTEM
1. Disconnect the power cord for safety before disassembly or reassembly work.
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 ensure electric
conductivity; be sure to use the washer for reassembly.
4. One of the mounting screws of the rear cover is fitted with a washer to protect against static
electricity; be sure to use the washer for reassembly.
5. If possible, avoid operating the printer with any of íts parts removed.
6. Unless otherwise noted, reassembly is the reverse of disassembly.
7. Take care not to bend the contact springs or soil contact surfaces; clean the contacts using an
alcohol solution if they are soiled.
1. EXTERNALS ........................................
4-1 IV.
A. Externa1 Covers ...............................
4-I
B. Control Panel ...................................
4-4
C. Copyboard Cover.. ...........................
4-4 V.
D. Fans.. ...............................................
4-5
II.
DRIVE SYSTEM ...................................
4-7
A. Lens Dríve Unit ................................
4-7 VI.
B. Scanner Drive Unit.. .........................
4-9
C. Main Motor Unit ...............................
4-12 VII.
III. FEED SYSTEM
....................................
4-13
A. Pick-Up Unit .....................................
4-13
B. Feeder Unit ......................................
4-16
EXPOSURE SYSTEM .____._,........,___,.,... 4-18
A. Illuminating Unit . ..__._......____...........
4-18
B. Blank Exposure Unit __.______.._,.,_____.... 4-19
CORONA SYSTEM ____..__._.,._.__............. 4-21
A. Drum Unit .
4-21
B. Primary and Transfer Corona Units 4-22
DEVELOPMENTSYSTEM _.________._______. 4-25
A. Developing Assembly _._,_.__..._.________ 4-25
FIXING SYSTEM .__...___.._..._____.............. 4-28
A. Fixing Assembly .._...........................
4-28
COPYAIGNT 0 1992 CANON ING.
CANON NPZWZMO RN.0 MAY 1990 PAINTEG IN JAPAN IIMPRIME AU JAPGNI