Digital Equipment LA30 N Printer Ribbon Manuals

Manuals and User Guides for Digital Equipment LA30 N Printer Ribbon. We have 1 Digital Equipment LA30 N Printer Ribbon manual available for free PDF download: Service Manual

Digital Equipment LA30 N Service Manual

Digital Equipment LA30 N Service Manual (141 pages)

Companion Printer

Brand: Digital Equipment | Category: Printer | Size: 1 MB

Table of Contents

Table of Contents
7
Chapter 1 Printer Specifications, Performance, and Configuration

14
- Overview
  14
- Figure 1.1 LA30N and LA30W Printers
  14
- Equipment Structure
  15
- Overview
  15
- Model Configuration
  15
- Structure
  16
- Figure 1.2 Printer Component Structure
  16
- Upper Cover Assembly
  17
- Figure 1.3 Upper Cover Assembly (LA30N)
  17
- Printing Mechanism Assembly
  18
- Lower Cover Assembly
  19
- Figure 1.4 Printer Lower Assembly (LA30N)
  19
Chapter 2 Unpacking, Performance Check, and Connection

20
Chapter 3 Troubleshooting

24
Chapter 4 Maintenance

40
- Overview
  40
- Notes on Use
  40
- Maintenance Tools
  41
- Maintenance Levels
  41
- Preventive Maintenance
  41
- Parts Drawings
  42
- Figure 4.1 Basic Components
  42
- Parts that Must Not be Disassembled
  43
- Figure 4.2 Location of Parts that Must Not be Disassembled
  43
- Level 1 Maintenance
  44
- Figure 4.3 Cleaning and Lubrication
  44
- Level 2 Maintenance
  45
- Parts Replacement
  45
- Acoustic Cover Replacement
  46
- Tractor Unit Replacement
  47
- Cover Replacement, Including Platen Knob
  50
- Control Panel Replacement
  54
- Printing Mechanism Replacement
  55
- Power Supply and Fuse Replacement
  56
- Board Replacement
  57
- Platen Roll Assembly Replacement
  60
- Paper Feed Motor (LF Motor) Replacement
  61
- Space Motor (SP Motor) Assembly Replacement
  62
- Sensor T Replacement
  63
- Carriage Unit Replacement
  64
- Print Head and Ribbon Feed Assembly Replacement
  66
- Gear Assembly Replacement
  67
- Paper Feeder Assembly Replacement
  68
- Card Guide Replacement
  69
- Ribbon Shift Unit (Color Kit) Replacement
  70
- Adjustment
  71
- Print Head Gap Adjustment
  71
- Vertical Alignment
  73
- Top-Of-Forms Adjustment (Factory Use)
  75
- Lubrication
  76
- Ribbon Drive Assembly
  77
- Color Ribbon Shift Motor (Option)
  78
- LF Gear Bearing and Continuous/Single Lever
  79
- Back Cover Assembly
  80
- Paper Feed Roller Shaft
  81
- Shaft
  82
- Stay Shaft
  83
- Front and Top Covers (LA30N)
  84
- Front and Top Covers (LA30W)
  85
- Sheet Guide Assembly
  86
- Diagnostics
  87
- Self-Test Printing
  87
- Starting Self-Test Printing
  87
- Checking Printer Performance
  88
- Stopping Self-Test Printing
  88
- Hex Dump
  89
- Starting Hex Dump Printing
  89
- Stopping Hex Dump Printing
  89
- Control Panel Maintenance Functions Initiated When Power Goes on
  90
Chapter 5 Principles of Operation

92
- Overview
  92
- Figure 5.1 Function Sequence
  92
- Mechanical Operation
  93
- Print Head Drive
  93
- Figure 5.2 Print Head
  93
- Carriage Drive
  94
- Figure 5.3 Carriage Drive
  94
- Ribbon Feed
  95
- Figure 5.4 Ribbon Feed
  95
- Paper Feed
  96
- Figure 5.5 Paper Feed Path
  96
- Continuous Forms Feeding
  97
- Figure 5.7 Continuous Form Feeding (Pull-Feed Tractor)
  98
- Cut-Sheet Feeding
  99
- Paper Selection
  100
- Figure 5.9 Paper Selection
  100
- Autoloading
  101
- Figure 5.10 Autoloading
  101
- Paper End Detection
  102
- Figure 5.11 Paper End Detection (Cut Sheet)
  102
- Figure 5.12 Paper End Detection (Continuous Forms Via Push-Feed Tractor)
  103
- Figure 5.13 Paper End Detection (Continuous Forms Via Pull-Feed Tractor)
  104
- Print Head Gap Control (Paper Thickness Adjustment)
  105
- Figure 5.14 Print Head Gap Control
  105
- Color Ribbon Shift Motor (Option)
  106
- Figure 5.15 Color Ribbon Shift Motor
  106
- Option Detection Mechanism
  107
- Figure 5.16 Option Detection Mechanism
  107
- Electrical Operation
  108
- System Configuration
  108
- Printer Control Board (ROM Board)
  110
- Power Supply Unit
  110
- Sensors
  110
- Control Panel
  110
- Figure 5.20 MB90706 Block Diagram
  112
- Main Controller
  114
- Figure 5.22 Memory Configuration
  114
- Interface Control
  116
- Centronics Parallel Interface
  116
- Figure 5.23 Centronics Parallel Interface Signal Timing
  116
- Serial Interface
  117
- Figure 5.24 RS-423 Serial Interface Signal Timing
  117
- Carriage Motor Control
  118
- Figure 5.25 Stepping Motor Drive Circuit
  118
- Figure 5.26 Phase Switching and Carriage Drive Direction
  119
- Figure 5.27 Relationship between Carriage Drive Speed and Phase Excitation
  120
- Figure 5.28 Carriage Drive 1/2-Phase Excitation at Low Speed
  121
- Figure 5.29 Carriage Drive 2-Phase Excitation at High Speed
  121
- Print Head Control
  122
- Figure 5.31 Print Timing
  123
- Paper Feed Control
  124
- Figure 5.32 Phase Switching and Paper Feed Direction
  124
- Figure 5.33 Paper Feed Speed
  125
- Figure 5.34 1/2-Phase Excitation of Paper Feed
  125
- Ribbon Shift Control
  126
- Figure 5.35 Phase Switching and Ribbon Shift Direction
  126
- Figure 5.36 Ribbon Shift Speed
  127
- Figure 5.37 Ribbon Shift Phase Excitation
  127
- Fire Check Control
  128
- Short-Mode Detection
  128
- Long-Mode Detection
  128
- Figure 5.38 Fire Check Circuits
  129
- Control Panel Control
  130
- Power Supply
  131
- Surge Current Prevention
  131
- Rectifying and Smoothing
  131
- Figure 5.40 Surge Current Prevention Circuit
  131
- Main Voltage Regulation Switching
  133
- Protection
  133
- External Signal
  135
- Figure 5.42 PWSTOP Signal
  135
- Firmware Overview
  136
Chapter 6 Recommended Spare Parts

138

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