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LQ 1050 - B/W Dot-matrix Printer
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Epson LQ 1050 - B/W Dot-matrix Printer - Page 117
225 pages
Manual
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REV.-A
~ttach
the left and right locking tabs.
Slide the print head all the
Figure 4-4. Locking Tabs Installation
way to the left, and insert the print head
protector as shown below.
Figure 4-5. Printhead Protector Installation
4-4
116
118
Table of Contents
Main Page
Rev.-A Chapter 1 General Description
7
Table of Contents
7
General Description
7
Figure 1-1. Exterior Views of the FX-850/1050
10
Hardware Specifications
12
Cut Sheet Paper Printable Area
15
Fanfold Paper Printable Area
16
Figure 1-5. Head Adjustment Lever Positioning
17
Firmware Specifications
19
Interface Overview
21
8-Bit Parallel Interface Specifications
21
Figure 1-6. Data Transmission Timing of 8-Bit
21
Dip Switches and Jumper Setting
26
DIP Switch Settings
26
Self Test Operation
28
Printer Mechanism
28
Chapter 1 Features
29
Hexadecimal Dump Function
29
Hexadecimal Dump Printing
29
Hexadecimal Dump Mode
29
Turn off the Printer
29
Printer Initialization
30
Hardware Initialization
30
Software Initialization
30
Buzzer Operation and Error Conditions
31
Buzzer Operation
31
Error Conditions
31
Paper Handling Functions
32
Autoloading and Backout Function
32
Short Tear-Off Function
32
Paper End Detection
33
Main Components
34
PEGX Board (Main Board)
34
PEBFIL-11 Board (Filter Board) and Power Transformer
34
PGPNL Board (Control Panel)
34
Figure 1-11. Component Locations
34
Figure 1-12. Model-3B10 (FX-850)
35
Figure 1-13. Model-3B60 (FX-105O)
35
Figure 1-15. PEBFIL-11 Board and Power Transformer
37
Figure 1-16. Control Panel
38
Figure 1-17. Housing
40
Rev.-A Chapter 2 Operating Principles
41
Operating Principles
41
CHAPTER 2 Cable Connections
45
General
45
Figure 1-14. PEGX Board
46
Printer Mechanism Operation
47
Printhead
47
Carriage Mechanism
47
Home Position Sensor
49
Ribbon Feed Mechanism
50
Paper Feed Mechanism
51
Push Tractor Feeding Method
52
Circuit Operation
54
Information
54
Power Supply Section
54
Control Circuit Section
56
Memory Mapping
58
Power Supply Circuit
59
Filter Circuit
60
Transformer
60
Rectifier and Smoothing Circuit
61
Regulator Circuit
62
Pulse-Width Modulation (PWM) Circuit
63
Regulator Circuit
65
DC Supply Circuit
69
VX Voltage Supply Circuit
70
Main IC Function
71
CPU Functions
71
E05A15HA Gate Array Functions
73
E05A16GA Gate Array Functions
75
Main Circuit Operation
77
Interface Control Circuit
77
Reset Circuit
77
DIP Switch Circuit and Jumpers
81
Memory Back-Up Circuit
82
Chapter 4 Disassembly, Assembly, and Adjustment
110
General Repair Information
114
Parallel Interface
115
Disassembly and Assembly
118
Upper Case Removal
120
Control Panel Removal
121
Push Tractor Unit Removal
121
Circuit Board Removal
122
PEGX Board Removal
122
PEBFIL-11 Board Removal
124
Printer Mechanism Disassembly
125
Printer Mechanism Removal
126
Printhead Removal
127
FPC (Flexible Printed Cable) Removal
128
Carriage Motor Removal
129
Timing Belt-Belt-Driven Pulley Removal
131
Home Position Sensor Removal
132
Friction/Tractor Sensor Removal
134
Plunger Removal
135
Platen Unit Removal
136
Paper Release Lever Removal
137
Main and Base Frame Removal
138
Ribbon Driver Unit Removal
141
Carriage Removal
142
Paper Guide Plate Removal
144
Paper End Sensor Removal
145
Paper Holding Roller Set and Paper
146
Push Tractor Unit Disassembly
148
Paper Tension Unit Disassembly
149
A D J U S T M E N T
150
Chapter 5 Troubleshooting
157
Troubleshooting
157
General
158
Diagnostic Tool
159
PDOS System Feature
159
System Overview
159
How to Select the Host Computer
160
System Activation
160
Mode Selection
161
PDOS for RAM and CPU Check
164
Programmer Tips
165
Unit Replacement
166
Power Supply Circuit
174
Control Circuit
177
List of Figures
178
List of Tables
178
Lubrication and Adhesive Application
179
Preventive Maintenance
179
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