Preface; Outline - Canon imageCLASS MF269dw Service Manual

Preface

Outline

This chapter describes disassembly and reassembly procedures of the host machine. The service technician is to identify the
cause of host machine failures according to follow the disassembly procedures of each part to replace the defective parts or the
consumable parts. Note the following precautions when working on the host machine.
• Before disassembling or reassembling the host machine, be sure to disconnect its power cord from the electrical outlet.
• Remove the Toner Cartridge and Photosensitive Drum, when setting the host machine down on its rear side of the host
machine to the bottom.
• When having removed the Drum Unit from the host machine before disassembling and assembling the machine, be sure to
put the Photosensitive Drum in a protective bag even in a short period of time to prevent the adverse effect of light.
• Reassembling procedures are followed by the reverse of disassembly unless otherwise specified.
• Note the length, diameters, and locations of screws as you remove them. When reassembling the host machine, be sure to
use them in their original locations.
• Do not run the host machine with any parts removed as a general rule.
• Ground yourself by touching the metal part of the host machine before handling the PCB to reduce the possibility of damage
caused by static electricity.
• When you replace the part that the rating plate or the product code label is attached, be sure to remove the rating plate orthe
product code label and put it to the new part.
4. Parts Replacement and Cleaning
63