Centronics 704 Manuals

Manuals and User Guides for Centronics 704. We have 1 Centronics 704 manual available for free PDF download: Technical Manual

Centronics 704 Technical Manual

Centronics 704 Technical Manual (152 pages)

Brand: Centronics | Category: Printer | Size: 14.65 MB

Table of Contents

Table of Contents
6
8080A Microprocessor Pin Designations
28
MPU Block Diagram
29
MPU Status Word
32
Control Character Interrupt Routine
33
Flow Charts
33
Bus Structure
34
- Bus Structure Block Diagram
  34
  - Detailed Description
    35
  - I/O Bus Transfers
    36
- System Timing
  40
Serial Communications
42
- Input Data
  42
- Data Bus Assignments (Baud Rate Commands)
  43
- Control Characters
  44
  - Firmware Response
    44
  - Control Codese
    46
Mri and Device Select Decoding
47
- 3.7.1 Device Select
  47
Control Panel/Mpu Communications
50
- Control Panel Status Word
  51
Printer Mechanism Operation
52
- 3.10.2 Vidint Generation
  54
- Exploded Section of Timing Fence
  54
- Video Amplifier Simplified Schematic
  55
- Video Edge Detector Circuit/Timing
  56
- Character Generation
  58
- Miscellaneous Operations
  58
- 3211-3 Motor Control
  59
- Stepper Motor Operation
  61
- Basic Stepping Motor Operation
  62
- Stepper Motor Drive Circuit
  63
- Power Distribution
  64
- Printer Initialization
  66
- Main Program Monitoring Loop
  67
- Print Routine
  68
- Video Interrupt Routine
  69
- Carriage Drive Interrupt Routine
  70
- Paper Drive Interrupt Routine
  71
- Control Character Interrupt Routine
  72
- Centronics Nameplate
  75
- Recommended Tools
  87
- Penetration Adjustment (Print Head Assembly). 5=2
  90
- Carriage Actuator Arms Adjustment
  91
- Main Drive Belt Adjustment
  91
- Main Drive Belt Adjustment
  92
- Paper Feed Timing Belt Adjustment
  92
- Platen Adjustment
  93
- Tractor Drive Timing Belt Tension
  93
- Paper Tension Adjustment
  94
- Optical Pickup/Timing Fence Alignment
  95
- Optical Pickup, Vertical Alignment
  95
- Duty Cycle and Phase Adjustment of Video
  97
- Removal/Replacement
  99
- Cover Assemblies
  99
- Carriage Assembly
  99
- Print Head Assembly
  101
- Power Driver Board Assembly
  102
- Timing Fence Assembly
  103
- Video Amplifier Assembly
  104
- Ribbon Cartridge Assembly
  105
- Stepper Motor Assembly, Carriage Drive
  108
- Stepper Motor Assembly, Paper Drive
  109
- Primary Voltage Assembly
  114
- Fan Assembly
  116
- Logic Board Assembly
  117
- Control Panel Assembly
  118
- Functional Schematics
  119
- 7=3 Device Select
  119
- Control Panel/Mpu
  119
- VFU Reader/Mpu. CG/STM/CRM/MPU
  119
- Schematic Diagrams
  119
- Logic Board
  119
- Power Driver Board
  119
- Video Amplifier Board
  119
- Memory Map
  149
VFU Reader/Mpu COMMUNICATIONS
52

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