Canon imageRUNNER ADVANCE C350 series Service Manual page 309

4
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. During disassembly, reassembly or transportation of the printer, remove the cartridge if
required.
When the cartridge is out of the printer, put it 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, take care not to apply too much force when
tightening the screw.
The recommended torque value is shown below as a reference value.
RS tight
Fastened member Metal Resin Metal
Tightening M4 Approx. Approx. Approx.
torque 1.6 1.6 1.6
(N*m)
M3 Approx. Approx. Approx.
0.8 0.8 0.6
* For PCB, refer to the tightening torque value of resin (fastened member).
Type of Screws
RS tight W Sams
F-4-1
Type of Screws
W Sams Binding TP
Resin Metal Resin Metal
Approx. Approx. Approx. Approx. Approx.
0.8 1.6 0.8 1.6
Approx. Approx. Approx. Approx. Approx.
0.6 0.6 0.6 0.6
Binding TP
4-2
Resin
0.8
0.6
T-4-1
F-4-2
4-2