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LP27 Line Printer Technical Manual
Company:
Digital Equipment Corporation
Part:
EK-0LP27-TM
Keywords:
Cited by:
EK-0LP27-UG-002,
LP27 Line Printer User's Guide
Versions
Part
Date
Title
EK-0LP27-TM-003
1986-06
LP27 Line Printer Technical Manual
Copies of EK-0LP27-TM-003
No copies known to be online.
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