Epson AcuLaser C2900N Service Manual page 256

Chapter 3 Removal and Replacement Procedures
1.1 Before starting service procedure
- Start the procedure after turning off the power and removing the power cord from the outlet.
- When performing the service operation around the FUSER UNIT, ensure that FUSER UNIT and its
surrounding area have cooled down sufficiently.
- Pay sufficient attention to the parts during the procedure because they may be broken or may not
perform their functions properly if unreasonable force is applied.
- Since various types of screws are used, ensure that the right screws are used in their right positions.
Use special caution not to confuse the screws for plastic and the ones for sheet metal, because
using the wrong type of screw may result in damage to the screw threads or other troubles.
No. Type
Plastic
Screw for
1 plastic
Silver, tap
Parts etc Plastic
Plastic
Screw for
plastic
2
Silver, tap,
with flange
Sheet metal
Screw for
3 metal sheet
Silver
Parts etc Sheet metal
Sheet metal
Screw for
metal sheet
4 Silver, with
an external
tooth washer
Parts etc Sheet metal
Epson AcuLaser C2900N
Application Shape
Parts etc Plastic
How to distin-
guish
•Silver-colored
•Thread is coarser
than that of the
sheet metal
Coarse
type.
•Screw tip is thin.
•Silver-colored
•It has a flange.
•Screw thread is
coarse compar-
ing to the sheet
Coarse
metal type.
•Screw tip is thin.
•Silver-colored
•Diameter of the
thread section is
uniform.
•Silver-colored
•Provided with an
external tooth
washer.
•Diameter of the
thread section is
uniform.
3 - 2
Revision B
Major
Points to be applica-
noted tion loca-
tions
Oblique screwing
damages the
thread because
this screw cuts -
female threads in
the base material
as it goes in.
As it has a func-
tion to cut the
thread by itself, if
the screw is
•FUSER
inserted in an
UNIT
angle and tight-
ened, the screw
thread will be
damaged.
-
•Mounting
positions
of the
ground
wires.
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