Epson MX-80 Technical Manual page 4

TABLE OF CONTENTS
CHAPTER 1
GENRAL
1.1 Features of MX-80 1-1
1.2 Features of Interfaces 1-1
1.3 Serviceability 1-1
1.4 General Specifications of MX-80 1-2
1.4.1 Printer 1-2
1.4.2 Parallel Interface (Standard) 1-2
1.5 Major Components 1-3
CHAPTER 2
PRINCIPLES OF OPERATION
2.1 General 2-1
2.2 Block Diagrams 2-1
2.3 Principles of Operation 2-9
2.4 Electrical Circuits 2-9
2.5 Operating Principles of Printer Mechanism 2-23
2.5.1 Head carriage and paper feeding mechanisms 2-23
2.5.2 Print head 2-23
2.5.3 Ribbon feeding mechanism 2-34
2.5.4 Detecting mechanism 2-24
2.5.5 Frame section 2-24
CHAPTER 3
DISASSEMBLY, ASSEMBLY AND TROUBLESHOOTING
3.1 General 3-1
3.2 Tools and Measuring Instruments 3-1
3.3 Disassembly and Assembly 3-3
3.3.1 Removal of Upper Case 3-3
3.3.2 Disassembly of electric ciucuit block 3-5
3.3.3 Disassembly of M-3210 printer mechanism block 3-9
3.4 Symptoms of Trouble and Repair 3-15
3.4.1 General 3-15
3.4.2 Troubleshooting by symptom 3-1 6
3.4.3 Troubleshooting of control circuit board 3-20
CHAPTER 4
MAINTENANCE
4.1 General 4-1
4.2 Lubrication 4-1
4.2.1 Lubricants 4-1
4.2.2 Lubrication standards 4-1
4.2.3 Bonding Standards 4-2
4.3 Adjustments 4-4
4.3.1 Adjustment of head driving pulse width 4-4
4.3.2 Adjustment of timing pulse generating position 4-5
4.3.3 Adjustment of phase relationship
between timing signal and reset signal 4-6
CHAPTER 5
CIRCUIT DIAGRAMS
5.1 GENERAL 5-1
5.2 Connection Diagrams 5-1
5.3 Component Layout Drawings 5-5
CHAPTER 6
ir SIMPLE TROUBLESHOOTING
6.1 General 6-1
6.2 Troubleshooting 6-1
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