Ampex 230 Manuals

Manuals and User Guides for Ampex 230. We have 1 Ampex 230 manual available for free PDF download: Service Manual

Ampex 230 Service Manual

Ampex 230 Service Manual (94 pages)

VIDEO DISPLAY TERMINALS

Brand: Ampex | Category: Touch terminals | Size: 7 MB

Table of Contents

Table of Contents
4
1 Purpose and Scope

8
- General Description
  8
- Overview
  8
- References
  8
- Ampex 230/219 Video Display Terminal
  9
- Ampex 230 Specifications
  10
- Ampex 219 Specifications
  12
- Installation
  16
- Introduction
  16
2 Serial Port Interfaces

16
- Primary Port Interface
  16
- Printer Port Interface
  17
- Printer Port Pin Signal Assignments
  17
- Installation Requirements
  18
  - Space Allocation
    19
- User-Installable Options
  18
- Overall Dimensions
  19
  - Input Power
    20
- Input Power Requirements
  20
- Voltage Strapping Plug (Versions 1 and 2)
  21
  - AC Power Cord and Plug
    22
- Interface Cable Connections
  22
  - Keyboard Port Connection
    22
- Keyboard Port on Display Terminal
  23
- Power-On and Reset
  24
- Self-Test
  24
- General Description
  26
3 Introduction

26
- Operation and Components of the Terminal Controller PWBA
  26
- Theory of Operation
  26
- Terminal Basic Block Diagram
  27
- Controller PWBA Block Diagram
  28
  - Input/Output Mapping and the CPU
    29
- Communication I/O
  29
  - Keyboard I/O
    29
  - Central Processing Unit
    29
    
    Functions of the CPU
    29
    
    Buses Used for Interfacing
    30
    
    3.3.2.3 Memory Interfaces
    31
- Display I/O
  29
- Program Instruction Memory Configurations
  31
  - Operation of CPU Memory
    33
    
    Program ROM/PROM
    33
- 3.3.3.2 Data RAM
  33
- Attribute Delimiter Bits
  33
  - Video PWBA Block Diagram
    34
  - General Information
    35
- Operation of Display Circuitry
  33
- Operation of the PVTC Chip
  35
- PVTC Chip Initialization Register Selection
  35
  - Initialization Register Parameters
    36
  - Valid Address/Blanking and Sync Signals Relationship
    37
    
    Horizontal Sync
    38
    
    Vertical Sync
    40
    
    Cursor Signal
    40
- Character Generation
  40
  - Generation of Video Signals
    41
  - Basic Video
    41
  - Attribute Control Signals
    41
- Operation of the Display RAM
  40
- Driver-Receiver Operation
  42
  - Primary Port - RS232C Interface
    42
  - Primary Port - Current Loop Interface (Option)
    42
- Operation of Serial Interface Circuitry
  42
- RS232C Pin Signal Assignments
  42
  - Primary Port - RS422 (Option)
    43
  - Printer Port
    43
  - Operation of Bus Interface Chip
    43
- Current Loop Pin Signal Assignments
  43
- RS422 Pin Signal Assignments
  43
4 Introduction

44
- Maintenancj
  44
- Test Equipment
  44
- Performance Testing
  45
  - Power on Self Test
    45
  - Test Pattern
    45
  - Bad Component Error Messages
    45
  - Keyboard Test
    46
- Video Adjustments
  46
  - Brightness
    46
  - Horizontal Size
    46
  - Vertical Linearity
    46
- Dimensions of E Character
  49
  - Interconnection Diagram
    50
  - Video Waveform
    51
- Vertical Sync Waveform
  51
- Horizontal Sync Waveform
  52
- Vertical Deflection Waveform
  52
- Horizontal Deflection Waveform
  53
- Subassembly and Parts List
  54
  - Subassembly Location Diagram
    55
- Removing the Display Cover
  56
- Removing the Pedestal Cover
  57
- Discharging the CRT
  58
- Table
  78

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