Preface; Outline; Points To Note When Tightening A Screw - Canon imageRUNNER ADVANCE C3325 Series Service Manual

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Disassembly/Assembly■>■Preface■>■Points■to■Note■when■Tightening■a■Screw

Preface

Outline

This■chapter■describes■disassembly■and■reassembly■procedures■of■the■printer.
The■service■technician■is■to■identify■the■cause■of■printer■failures■according■to■the■"Chapter■6■
TROUBLESHOOTING"■and■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■printer.
1)■CAUTION:■Before■disassembling■or■reassembling■the■printer,■be■sure■to■disconnect■its■
power■cord■from■the■electrical■outlet
2)■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.
3)■Reassembling■procedures■are■followed■by■the■reverse■of■disassembly■unless■otherwise■
specified.
4)■Note■the■length,■diameters,■and■locations■of■screws■as■you■remove■them.■When■
reassembling■the■printer,■be■sure■to■use■them■in■their■original■locations.
5)■Do■not■run■the■printer■with■any■parts■removed■as■a■general■rule.
6)■Ground■yourself■by■touching■the■metal■part■of■the■printer■before■handling■the■PCB■to■reduce■
the■possibility■of■damage■caused■by■static■electricity.
7)■When■you■replace■the■part■that■the■rating■plate■or■the■product■code■label■is■attached,■be■
sure■to■remove■the■rating■plate■or■the■product■code■label■and■put■it■to■the■new■part.
4 Disassembly/Assembly■>■Preface■>■Points■to■Note■when■Tightening■a■Screw
Points■to■Note■when■Tightening■a■Screw
For■reduction■in■weight,■thin■plates■are■used■in■some■parts■of■this■machine.
In■the■case■of■a■screw■hole■with■a■triangle■mark■near■it■as■shown■in■the■figure■below,■strongly■
tightening■the■screw■may■damage■or■deform■the■screw■hole.
In■the■case■of■a■screw■hole■with■a■triangle■mark,■carefully■tighten■the■screw,■taking■care■not■to■
apply■too■much■force.
The■recommended■torque■value■is■shown■below■as■a■reference■value.
Screw■(RS■
tightening)
Fastened■member Metal Resin
Tightening■torque■ M4 Approx.■ Approx.■ Approx.■
(N*m) 1.6 1.6
M3 Approx.■ Approx.■ Approx.■
0.8 0.8
*■For■PCB,■refer■to■the■tightening■torque■value■of■resin■(fastened■member).■
Type of Screws
RS tight W Sams
F-4-1
Types■of■screws
W■Sems Binding TP
Metal Resin Metal Resin Metal Resin
Approx.■ Approx.■ Approx.■ Approx.■ Approx.■
1.6 0.8 1.6 0.8 1.6
Approx.■ Approx.■ Approx.■ Approx.■ Approx.■
0.6 0.6 0.6 0.6 0.6
Binding TP
4-2
0.8
0.6
T-4-1
F-4-2
4-2