Printer Disassembly And Assembly - Epson 2070 - LQ B/W Dot-matrix Printer Service Manual

Disassembly and Assembly

3.2. PRINTER DISASSEMBLY AND ASSEMBLY

This section describes procedures for disassembling and assembling the main components of the printer.
When the procedure for installing a component is simply the reverse of removing the component, this chapter
does not describe the assembly procedure. If necessary, special notes on assembling or adjusting a component
are given at the end of the description of each procedure. Be sure to follow the instructions in these notes.
• Before disassembling any part of the printer, note the warnings in Section 3.1.
• Before beginning to disassemble the printer, remove the paper and the ink ribbon.
Also disconnect the interface cable.
• Whenever the printer is repaired, wipe the surface of the paper width (PW) sensor assembly
with a soft cloth, and keep it clean to avoid abnormal operation. If the surface is dirty from
any adhering material, sensor sensitivity goes down and operation is not correct.
• Be careful operating the release lever. Frequent operation of the release lever back and forth
without the upper housing cover may cause damage to the lever or dislocation of the engagement.
Note: Exploded diagrams in the appendix show you how the components fit together. Refer to them
as necessary. The flowchart below shows the order you need to use to disassemble the
printer. For details of the required adjustments, refer to Chapter 4.
3.2.2
Removing the Panel
Board Assembly
3.2.9.1
Removing th e PF
Motor Assembly
Figure 3-2 Flowchart for Disassembling the Printer
3-4
CAUTION
S T A R T
Disconnect power
cord and I/F cable.
3.2.1 Page 3-5
Before Starting
Disassembly
Page 3-6 3.2.3 Page 3-7 3.2.4 Page 3-8
Remo ving the
Removing the
Printhead
HP Sensor
3.2.7 Page 3-11
Removing the Upper
Housing Assembly
3.2.8 Page 3-1 2 3.2.9
Page 3-13
Removing the
Removing the CR
Printer Mechanism
Motor Assembly
Page 3-1 4 3.2.9.2 3.2.9.3 Page 3-16
Page 3-15
Removing the Removing the Right
P G Se nso r
Frame Asse mbly
3.2.9.6
Page 3-2 0 3.2.9.7 Page 3-2 1
Removi ng the RD
Removing the CR
Assembly
Assembly
LQ-2070 Service Manual
Bidirectional adjustment
required.
PG adjustment
required.
Bidirectional and PG
adjustment required.
Bidirectional adjustment
and factory setting required
(when part is replaced).
TPE level reset required
(when part is replaced).
Page 3-10
3.2.5 Page 3-8 3.2.6
Remo ving the Removing t he
PW Sensor Platen Assembly
3.2.10
Page 3-24 3.2.11 Page 3-25
Removing the Removing the
C1 86 M AIN Board C166 PSB /E Boa rd
3.2.9.4 Page 3-16 3.2.9.5 Page 3-1 9
Removing the Left
Disassembling the
Right Sub Frame Frame Assembly
3.2.9.9 Page 3-23
3.2.9.8 Page 3-2 3
Removing the Front
Removing the Rear
PE Sensor
PE Sensor
Rev.A