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TM-L90 series
Epson TM-L90 series User Manual
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3-12
Disassembly and Assembly
Rev.C
Confidential
Main Case
Assem
bly
1.
With the main assembl
y upside down, remove two S5
screws and one S3 screw.
2.
Remove the main case assembly.
CAUTION:
When instal
ling the case, d
o not pinch the lead wir
e. Doing so may cause failures.
Inst
all in
the re
vers
e seq
uen
ce of
rem
oval.
Main case asse
mbly
S3
S5
32
34
Table of Contents
Default Chapter
1
Service Manual
1
Table of Contents
6
For Safe Repair and Maintenance Work
9
Key to Symbols
9
Safety Precautions on Maintenance/Repair/Inspection
9
Modular Connector
10
About this Manual
11
Aim of the Manual
11
Contents of the Manual
11
Related Documentation
12
Chapter 1 Product Overview
13
Specifications and Configurations
13
Chapter 2 Troubleshooting Guide
14
Preparations for Troubleshooting
14
Before Servicing
15
Diagnosing Failures
15
Symptoms and Solutions
16
How to Use the Self-Test
17
Print Tests
17
Troubleshooting Using the ERROR LED
18
Test Points on the Printer Mechanism
21
Chapter 3 Disassembly and Assembly
22
Notes for Assembly and Disassembly
22
How to Read this Chapter
23
Structure of this Chapter
23
Shortest Route for Disassembly of Major Parts
24
Representation of Small Parts
24
Replacing the Thermal Print Head Assembly
25
Disassembly and Assembly of the TM-L90
30
First Level
30
Disassembly and Assembly of the Printer Mechanism
36
First Level
36
Second Level
56
Third Level
68
Chapter 4 Adjustment and Settings
74
Threshold Value Setting for Detectors
74
Chapter 5 Maintenance, Inspection, Lubrication, and Cleaning
76
Periodic Maintenance or Inspection
76
Lubrication
76
Cleaning
76
Recommended Cleaning
76
Cleaning the Case
77
Cleaning the Thermal Head
77
Chapter 6 Installation
78
Installation Precautions
78
Installation Position
78
Vertical Installation
78
Horizontal Installation
79
Wall Mounting
79
Setting the Installation Position for the Roll Paper Near-End Detector
80
Adjusting the Detecting Point of the Roll Paper Near-End Detector
81
Setting the Paper Roll Cutting Method
82
Setting the Paper Roll Width
84
Attaching the Power Switch Cover
85
Setting the DIP Switches
86
Location of the DIP Switches
86
DIP Switch Settings
87
Connecting Cables
89
Setting the NV Memory
90
Memory Switch Setting Mode
90
Paper Layout Automatic Setting Mode
91
Memory Switches
91
Customized Values
93
Serial Communication Conditions
93
Chapter 7 Handling
94
Safety Precautions
94
Precautions on Handling the Printer
95
Precautions on Paper Handling
96
Part Names
96
Leds and Button
97
Handling
97
Powering the Unit on or off
97
Loading the Paper Roll
99
Removing the Roll Paper
100
Appendix A General Specifications
101
Printing Specifications
101
Paper Specifications
101
Autocutter
104
Paper Roll Supply Device
105
Electrical Specifications
106
Dimensions and Mass
106
Environmental Conditions
107
Drawer Kick-Out Connector
108
Interfaces
108
Buttons and Switches
108
Power Switch
108
Panel Button
108
DIP Switches and NV Memory
109
Indicators
109
Panel Leds
109
Appendix B Overview of the Mechanisms
111
Cover Unit
112
Print/Paper Feed Unit
113
Thermal Print Head
114
Paper Supply Unit
115
Changing the Paper Width
116
Autocutter Unit
116
Full Cut and Partial Cut
117
Manual Cut
117
Appendix C Tools
118
Appendix D Parts List
119
Alphanumeric List
119
Reference Number List
122
Overall Exploded Diagram
127
Case Unit
127
Printer Mechanism
128
Appendix E Lubrication Points Diagram
129
Appendix F Overview of Electric Circuits
130
General Description
130
Main Circuit Board Unit
131
Switch Circuit Board Assembly
134
Sub Circuit Board Assembly
134
Interface Circuit Board Unit
134
Test Points
135
Test Points on the Main Circuit Board
135
Test Point Locations
136
Parts Layout
137
Main Circuit Board Unit
137
Switch Circuit Board Assembly
139
Sub Circuit Board Assembly
139
Circuit Board Diagrams
140
Main Circuit Board (1 of 3) (Drawing Number 1
140
Main Circuit Board (2 of 3) (Drawing Number 2
141
Main Circuit Board (3 of 3) (Drawing Number 20
142
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Epson TM-L90 series Specifications
General
Brand
Epson
Model
TM-L90 series
Category
Printer
Language
English
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