LP27 Line Printer Technical Manual

Company:Digital Equipment Corporation
Part:EK-0LP27-TM-003
Date:1986-06
Keywords:

Table of Contents

  • Chapter 1 Introduction
    • 1.1 Overview
    • 1.2 Functional Description
      • 1.2.1 Processing and Control
      • 1.2.2 Character Band Drive
      • 1.2.3 Paper Feed
      • 1.2.4 Interface
      • 1.2.5 Hammer Driver
      • 1.2.6 Timing and Status
      • 1.2.7 Ribbon Drive
    • 1.3 Printer Specifications
    • 1.4 Printer Options
    • 1.5 Applicable Documents
  • Chapter 2 Installation on VAX-11/PDP-11
    • 2.1 Site Preparation
      • 2.1.1 Long Line Connector Kit Assembly
    • 2.2 Transporting the Printer
    • 2.3 Unpacking the Printer
    • 2.4 Leveling the Printer
    • 2.5 Inspection
      • 2.5.1 Setting the DAVFU Switch
    • 2.6 Printer Power Connection
      • 2.6.1 Power Receptacles and Plugs
      • 2.6.2 Requirements for Special Plugs
      • 2.6.3 Common Configurations
      • 2.6.4 Procedure for Connecting AC Power Cord to Power Sources in Foreign Countries
    • 2.7 Printer Power-Up
    • 2.8 Interconnect to VAX-11 Systems
      • 2.8.1 VAX-11/730, -11/750, and -11/780, LP27-UA/UB, M7258 Controller and 70-16560 Cable
      • 2.8.2 VAX-11/730, -11/750, and -11/780, LP27-UA/UB, M7258 Controller and BC27A-XX Cable
      • 2.8.3 VAX-11/730, -11/750, and -11/780, LP27-VA/VB, DMF32 Controller and BC27A-XX Cable
      • 2.8.4 VAX-11/730, -11/750, and -11/780, LP27-DA/DB, M7258/M5973 Controller and Long Line Cable
      • 2.8.5 Installing the LP27-DA/DB on the VAX-11 System
      • 2.8.6 LP27-QA, QB Printer with M8027 Controller (LPV11)
        • 2.8.6.1 Installing the M8027 Controller in the BA23A Enclosure
        • 2.8.6.2 Installing the M8027 in the H9642 Deep Cabinet Enclosure
        • 2.8.6.3 Installing the M8027 in the BA123A World Box Enclosure
      • 2.8.7 Installing the M8027 Controller and Connecting Cable
    • 2.9 MicroVAX II MDM Diagnostics
      • 2.9.1 Prerequisites and Requirements
        • 2.9.1.1 Prerequisites
        • 2.9.1.2 Hardware Requirements
        • 2.9.1.3 Software Requirements
      • 2.9.2 Operator Commands
      • 2.9.3 Loading MicroVAX Maintenance Software
        • 2.9.3.1 Main Menu
      • 2.9.4 System Configurations and Devices
        • 2.9.4.1 System Configuration
        • 2.9.4.2 Sample Error Messages
      • 2.9.5 Service Menu
      • 2.9.6 Verify Exerciser Mode
      • 2.9.7 Functional Service Mode
      • 2.9.8 Service Menu Devices
      • 2.9.9 Program Functional Description
    • 2.10 VAX-11 Diagnostic Test
    • 2.11 Interconnect for PDP-11 Unibus Device
      • 2.11.1 LP27-UA/UB, M7258 and 70-16560-30 Cable
      • 2.11.2 LP27-UA/UB, M7258 and BC27A-XX Cable
      • 2.11.3 LP27-DA/DB, M7258/5973 Controller and Long Line Cable
      • 2.11.4 Installing the LP27-DA/DB on the PDP-11 System
    • 2.12 PDP-11 Diagnostic Test
      • 2.12.1 Test Descriptions
      • 2.12.2 Commands
      • 2.12.3 Setting Legal Switches
      • 2.12.4 FLAGS Usage
      • 2.12.5 Hardware Considerations
      • 2.12.6 Software Considerations
  • Chapter 3 Installation on DECsystem-10/-20
    • 3.1 Site Preparation
    • 3.2 Transporting the Printer
    • 3.3 Unpacking the Printer
    • 3.4 Leveling the Printer
    • 3.5 Inspection
    • 3.6 Printer Power Connection
    • 3.7 Printer Power-Up
    • 3.8 LP20 Installation
      • 3.8.1 Unpacking the LP20 Controller
      • 3.8.2 Inspection
      • 3.8.3 Installing the LP20 Controller
        • 3.8.3.1 Module Configuration
        • 3.8.3.2 Installing a Single LP20 Controller
        • 3.8.3.3 Installing Two LP20 Controllers
    • 3.9 DECsystem Diagnostic Test
  • Chapter 4 Operation
    • 4.1 Controls and Indicators
    • 4.2 Printer Interlocks
    • 4.3 Operating Procedures
      • 4.3.1 Ribbon Installation/Removal
        • 4.3.1.1 Ribbon Installation
        • 4.3.1.2 Ribbon Removal
      • 4.3.2 Character Band Removal/Installation
        • 4.3.2.1 Character Band Removal
        • 4.3.2.2 Character Band Installation
      • 4.3.3 Paper Loading
      • 4.3.4 Power-Up/Restart
      • 4.3.5 Power Down
      • 4.3.6 Tractor Vertical Alignment Procedure
      • 4.3.7 Paper Puller Operation
      • 4.3.8 Registration Check
      • 4.3.9 Forms Length Select Switch
    • 4.4 Status Indicators
    • 4.5 Care and Maintenance
    • 4.6 Paper Selection Guide
  • Chapter 5 Theory of Operation
    • 5.1 General Description
    • 5.2 Printer Electronics
    • 5.3 Processor PCB
    • 5.4 Character Band Electronics and Drive
      • 5.4.1 Band Gate PCB
        • 5.4.1.1 Band Drive Circuitry
        • 5.4.1.2 Ribbon Drive Circuitry
      • 5.4.2 Ribbon Deskew Operation
    • 5.5 Paper Feed System
      • 5.5.1 Paper Feed Driver PCB
      • 5.5.2 Paper Feed Motor
      • 5.5.3 Tractors
      • 5.5.4 Paper Motion/Paper Low Detection
    • 5.6 Format Control
      • 5.6.1 Direct Access Vertical Format Unit (DAVFU)
    • 5.7 Paper Puller
    • 5.8 Interface
      • 5.8.1 Interface PCB
      • 5.8.2 Interface Timing
      • 5.8.3 Timing and Status PCB
      • 5.8.4 Interface Handshaking
      • 5.8.5 Interface Connections
    • 5.9 Motherboard PCB
    • 5.10 Hammer Driver PCB System
      • 5.10.1 Hammer Driver PCB
    • 5.11 Power Supply
      • 5.11.1 Constant Voltage Transformer (CVT)
      • 5.11.2 Linear +5 V Regulator
      • 5.11.3 Circuit Breaker
    • 5.12 Printer Cooling
  • Chapter 6 Maintenance
    • 6.1 General
      • 6.1.1 Protection and Safety
    • 6.2 Maintenance Preparation
    • 6.3 Preventive Maintenance
      • 6.3.1 Inspection
      • 6.3.2 Cleaning
    • 6.4 Corrective Maintenance
    • 6.5 Alignments and Adjustments
      • 6.5.1 Band Gate Latch Assembly Adjustment
      • 6.5.2 Band Gate Latch Switch Adjustment
      • 6.5.3 Band Tracking Adjustments
        • 6.5.3.1 Band Tracking -- Drive Pulley Adjustment
        • 6.5.3.2 Band Tracking -- Tilt Adjustment
        • 6.5.3.3 Band Tracking -- Motor Side Pulley Adjustment
        • 6.5.3.4 Band Tracking -- Idler Side Pulley Adjustment
      • 6.5.4 Character Phasing Adjustment
      • 6.5.5 Hammer Flight Time Adjustment
      • 6.5.6 Paper Feed Adjustment
      • 6.5.7 Ribbon Guide Adjustment
      • 6.5.8 Ribbon Mask Adjustment
      • 6.5.9 Ribbon Skew Control Adjustment
      • 6.5.10 Tractor Eccentric Tension Adjustment
      • 6.5.11 Transducer Adjustment
      • 6.5.12 VCL Adjustment
    • 6.6 Removal and Replacement Procedures
      • 6.6.1 Plug-In PCB Removal/Replacement
        • 6.6.1.1 Removal
        • 6.6.1.2 Replacement
      • 6.6.2 Fuse Removal/Replacement
        • 6.6.2.1 Removal
        • 6.6.2.2 Replacement
      • 6.6.3 Band Cover Sensor Removal/Replacement
        • 6.6.3.1 Removal
        • 6.6.3.2 Replacement
      • 6.6.4 Band Drive Pulley and Motor Removal/Replacement
        • 6.6.4.1 Removal
        • 6.6.4.2 Replacement
      • 6.6.5 Band Gate PCB Removal/Replacement
        • 6.6.5.1 Removal
        • 6.6.5.2 Replacement
      • 6.6.6 Band Gate Latch Switch Removal/Replacement
        • 6.6.6.1 Removal
        • 6.6.6.2 Replacement
      • 6.6.7 Band Gate Striker Plate Roller Removal/Replacement
        • 6.6.7.1 Removal
        • 6.6.7.2 Replacement
      • 6.6.8 Control Panel Removal/Replacement
        • 6.6.8.1 Removal
        • 6.6.8.2 Replacement
      • 6.6.9 Cover Removal/Replacement -- LF Side
        • 6.6.9.1 Removal
        • 6.6.9.2 Replacement
      • 6.6.10 Cover Removal/Replacement -- RT Side
        • 6.6.10.1 Removal
        • 6.6.10.2 Replacement
      • 6.6.11 Latch Solenoid Driver PCB Removal/Replacement
        • 6.6.11.1 Removal
        • 6.6.11.2 Replacement
      • 6.6.12 Fan Assembly Removal/Replacement
        • 6.6.12.1 Removal
        • 6.6.12.2 Replacement
      • 6.6.13 Hammer Bank Assembly Removal/Replacement
        • 6.6.13.1 Removal
        • 6.6.13.2 Replacement
      • 6.6.14 Hammer Module Removal/Replacement
        • 6.6.14.1 Removal
        • 6.6.14.2 Replacement
      • 6.6.15 Forms Length Select and FLS/VFU Switch Removal/Replacement
        • 6.6.15.1 Removal
        • 6.6.15.2 Replacement
      • 6.6.16 Paper Feed Drive Belt Motor Removal/Replacement
        • 6.6.16.1 Removal
        • 6.6.16.2 Replacement
      • 6.6.17 Paper Low Sensor Removal/Replacement
        • 6.6.17.1 Removal
        • 6.6.17.2 Replacement
      • 6.6.18 Paper Motion Sensor Removal/Replacement
        • 6.6.18.1 Removal
        • 6.6.18.2 Replacement
      • 6.6.19 Paper Puller/Paper Guide Removal/Replacement
        • 6.6.19.1 Removal
        • 6.6.19.2 Replacement
      • 6.6.20 Paper Puller Drive Roller/Sleeve Removal/Replacement
        • 6.6.20.1 Removal
        • 6.6.20.2 Replacement
      • 6.6.21 Paper Puller Motor Removal/Replacement
        • 6.6.21.1 Removal
        • 6.6.21.2 Replacement
      • 6.6.22 Plenum Interlock Switch Removal/Replacement
        • 6.6.22.1 Removal
        • 6.6.22.2 Replacement
      • 6.6.23 Power ON/OFF Switch Removal/Replacement
        • 6.6.23.1 Removal
        • 6.6.23.2 Replacement
      • 6.6.24 Power Supply PCB Removal/Replacement
        • 6.6.24.1 Removal
        • 6.6.24.2 Replacement
      • 6.6.25 Power Supply PCB Fuse Removal/Replacement
        • 6.6.25.1 Removal
        • 6.6.25.2 Replacement
      • 6.6.26 Power Supply Transformer Assembly Removal/Replacement
        • 6.6.26.1 Removal
        • 6.6.26.2 Replacement
      • 6.6.27 Tractor Removal/Replacement
        • 6.6.27.1 Removal
        • 6.6.27.2 Replacement
      • 6.6.28 Tractor Cable Removal/Replacement
        • 6.6.28.1 Removal
        • 6.6.28.2 Replacement
      • 6.6.29 Transducer Removal/Replacement
        • 6.6.29.1 Removal
        • 6.6.29.2 Replacement
    • 6.7 Troubleshooting
      • 6.7.1 General
      • 6.7.2 Problem Solving
      • 6.7.3 System Troubleshooting
  • Appendix A 64 Data Processing (EDP) Character Set
  • Appendix B 96 Data Processing (EDP) Character Set
  • Appendix C Printer Code Chart
  • Appendix D VAX-11 Diagnostics
  • Appendix E DECsystem-10/-20 Diagnostics
    • E.1 General
  • Appendix F Interface Connector -- Pin Assignments
  • Appendix G Motherboard -- Pin Assignments
  • Appendix H Special Bands List
  • Appendix I Specifications
    • I.1 Electrical
    • I.2 Printing
    • I.3 Dimensional
    • I.4 Environmental
    • I.5 DAVFU
    • I.6 Controller Specifications
  • Appendix J Configuration Switch Settings

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