COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 4 IMAGE FORMATION SYSTEM4-38VIII. DISASSEMBLY/ASSEMBLYMake sure of the following when disassembling or assembling the machine:1. When the printer unit power switch is turned off, the fans will operate for about30 min to cool the machine (so as to prevent caking of toner). Be sure to performeither of the following in addition to disconnecting the power plug:• Wait for 30 min after turning off the printer unit power switch; or• Turn off the printer unit power switch, and remove the fixing assembly of theprinter unit.2. Assemble the parts by reversing the steps used to disassemble them, unless other-wise mentioned.3. Identify the screws by type (length, diameter) and location.4. Do not leave out the toothed washer that comes with one of the mounting screws onthe rear cover to protect against static electricity.5. Do not leave out the washer that comes with the screw used for the grounding wireand the varistor to ensure electrical continuity.6. Do not operate the machine with any of its parts removed, unless otherwise men-tioned.7. Do not throw a toner cartridge into fire. It may explode.8. Keep any toner cartridge in a protective cover whenever it has been taken out of thecopier for disassembly/assembly work even for a short time.9. Remove the cartridge and the intermediate transfer drum before disassembly/assem-bly work or moving the machine.10. Touch the machine’s metal section before starting the work to discharge the build-upof static electricity so as to prevent static damage before handling any PCBs.11. To slide out the printer unit from the rack (if the reader unit is also mounted to therack), pull halfway out the two side pins at the bottom of the rack (middle pin orienta-tion *), and then remove the printer unit fixing member from the left of the copier. Besure also to remove the printer side power cord and the interface cable.For removal of the external covers of the printer unit, see IV.A. “External Covers of thePrinter Unit” in Chapter 3.Download free service manual at http://printer1.blogspot.com
