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VT52
Maintenance manual
Digital Equipment DECscope VT52 Maintenance Manual
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Also See for DECscope VT52
:
Service manual
(60 pages)
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
CONTENTS (Cont)
General Description
Specifications
Auxiliary Keypad
CAPS LOCK Key
Documentation Ordering Information
Chapter 2 Installation
Site Planning
Unpacking and Inspection
Installation and Setup
Acceptance Test Procedures
Chapter 3 Operation
The BREAK Key
The REPEAT Key
The SCROLL Key
The COPY Key
Per Ating Procedure
Off-Line
On-Line
User Maintenance
Technical Description
General
Functional Description
VT52 Video Terminal
Upper Case
Lower Case
VT52 Input Terminal
VT52 Output Terminal
Module Description
Data Paths, Memory, and Decoders Module (DP)
Video Shift Register (VSR)
Decoders
Cycle Time
Character Generator
ROM, UART, Timing Module (RUT)
ROM and PC
Timing
Uart
The Monitor and Power Supply Module
The CRT
Beam Deflection
Power Supply
Keyboard
Microprogram
Servicing the Keyboard
Hold-Screen Mode
Terminal Identification
Flashing the Cursor
Chapter 5 Servicing
Service Philosophy
Subassembly Level Troubleshooting
Identifying the Faulty Subassembly
Analyzing the Symptoms
Subassembly Replacement
I Removing the Base Assembly
Replacing the ROM. UART and Timing (RUT) or Data Path
Memory and Decoder (DP) Module
Replacing the Monitor/Power Supply Module
Replacing the Keyboard
Replacing the CRT Assembly
Captive Screws
Replacing the Transformer Assembly
Display Alignments and Adjustments
CRT Yoke Alignment
Display Adjustments
Height
Width
Vertical Linearity
Focus
Voltage Checks
Testing the no VOLTAGE Condition
Testing the +5 V Supply
Testing the -12 V Supply
Timing Waveforms
Monitor Waveforms
Copier Block Diagram
Copier Timing
Operating the Copier
Programming the Copier
Copier Removal and Replacement Procedure
Copier Maintenance
Copier Troubleshooting
Copier Specifications
Related Documentation
Vt52 Printer Interface Option
Vtxx-Ka Introduction
Printer Interface Block Diagram
Parallel Operation
Vtxx-Ka Installation
Installation of the VTXX-KA Module
Vtxx-Ka
Serial EIA Printer Interface Cable Installation
Parallel Printer Interface Cable Installation
Parallel Interface Cable
Initial Set up
Initial Test Procedure
Vtxx-Ka Operation Instructions
Vtxx-Ka Programming Information
Host Computer Commands
Data Format
Status Reporting
Vtxx-Ka Troubleshooting
Reference Data
Aprom. Rom Cross Reference Chart a
IC Pin Location Drawings
Truth Table
Data Inputs
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EK-VT52-MM-002
VT52 DECscope
Maintenance Manual
digital equipment corporation maynard, massachusetts
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Table of Contents
Troubleshooting
CHAPTER 5 SERVICING
67
COPIER TROUBLESHOOTING
105
VTXX-KA TROUBLESHOOTING
127
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