LP27 Line Printer Technical Manual

Part	Date	Title
EK-0LP27-TM-001		LP27 Line Printer Technical Manual
EK-0LP27-TM-002		LP27 Line Printer Technical Manual
EK-0LP27-TM-003	1986-06	LP27 Line Printer Technical Manual

Table of Contents (from EK-0LP27-TM-003)

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

Company:	Digital Equipment Corporation
Part:	EK-0LP27-TM
Keywords:
Cited by:	EK-0LP27-UG-002, LP27 Line Printer User's Guide

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LP27 Line Printer Technical Manual

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Table of Contents (from EK-0LP27-TM-003)