Epson 2070 Service Manual - Page 98

Removing the Driven Pulley Holder, Removing the RD Assembly

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Disassembly and Assembly LQ-2070 Service Manual 3.2.9.6 Removing the Ribbon Drive (RD) Assembly 1. Remove the rear/front edge guide assembly, front cover, paper eject assembly, rear/front tractor unit, and printer cover (see Section 3.2.1). 2. Remove the panel board (see Section 3.2.2) and upper housing assembly (see Section 3.2.7). 3. Remove the printer mechanism (see Section 3.2.9). 4. Remove the left frame assembly (see Section 3.2.9.5). 5. Remove the driven pulley holder by loosing CBS screw(3 x 6, F/Zn), and then remove the driven cover. CBS Screw (3x6, F/Zn) Left Frame Assembly Shaft of Driven Pulley Assembly Driven Pulley Cover pulley Driven Pulley Holder Timing Belt Driven Pulley Assembly Figure 3-25 Removing the Driven Pulley Holder 6. Remove 2 CBS screws (3 × 8, F/Zn ) securing the RD assembly to the front frame. 7. Remove the RD assembly from the front frame. 8. Remove the timing belt from the RD assembly. Driven Pulley Assembly RD Assembly Timing Belt Figure 3-26 Removing the RD Assembly Assembly Notes Notice how the gears in the RD assembly are engaged. Refer to the following figure. The tightening torque for the CBS screw (3 × 8, F/Zn) = 0.78 ~ 0.98 Nm (8 ~ 10 Kg f- cm) Adjust the platen gap and perform the bidirectional print alignment. See Chapter 4. Rachet, RD Combination Spring (7g/23g) Driven Pulley Assembly Spur Gears (11mm) Spur Gear (25mm) Figure 3-27 Engaging Gears for the RD Assembly 3-20 Rev.A

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3.2.9.6 Removing the Ribbon Drive (RD) Assembly
1.
Remove the rear/front edge guide assembly, front cover, paper eject assembly, rear/front tractor
unit, and printer cover (see Section 3.2.1).
2.
Remove the panel board (see Section 3.2.2) and upper housing assembly (see Section 3.2.7).
3.
Remove the printer mechanism (see Section 3.2.9).
4.
Remove the left frame assembly (see Section 3.2.9.5).
5.
Remove the driven pulley holder by loosing CBS screw(3 x 6, F/Zn), and then remove the driven
pulley
cover.
6.
Remove 2 CBS screws (3
×
8, F/Zn ) securing the RD assembly to the front frame.
7.
Remove the RD assembly from the front frame.
8.
Remove the timing belt from the RD assembly.
Notice how the gears in the RD assembly are engaged. Refer to the following figure.
The tightening torque for the CBS screw (3
×
8, F/Zn)
=
0.78 ~ 0.98 Nm (8 ~ 10 Kg f- cm)
Adjust the platen gap and perform the bidirectional print alignment. See Chapter 4.
Driven Pulley Cover
Shaft of Driven Pulley Assembly
Timing Belt
Left Frame Assembly
CBS Screw (3x6, F/Zn)
Driven Pulley Assembly
Driven Pulley
Holder
Figure 3-25 Removing the Driven Pulley Holder
Driven Pulley Assembly
RD Assembly
Timing Belt
Figure 3-26 Removing the RD Assembly
Rachet, RD
Combination Spring
(7g/23g)
Spur Gear
(25mm)
Spur Gears
(11mm)
Driven Pulley Assembly
Figure 3-27 Engaging Gears for the RD Assembly
Disassembly and Assembly
LQ-2070 Service Manual
3-20
Rev.A