Calcomp 142 Manuals

Manuals and User Guides for Calcomp 142. We have 1 Calcomp 142 manual available for free PDF download: Technical Manual

Calcomp 142 Technical Manual

Calcomp 142 Technical Manual (109 pages)

Brand: Calcomp | Category: Floppy Disk Drive | Size: 4.55 MB

Table of Contents

Table of Contents
4
Section Page
5
Introduction
8
Description
8
Physical and Electrical Characteristics
8
Special Tools and Test Equipment
10
2 Installation and Operation

12
- Unpacking
  12
- Installation
  12
  - Ac Power Cable
    12
  - DC and Signal Cabling
    12
  - Data Output Selection
    17
  - Checkout
    17
- Operation
  17
  - Floppy Disk Storage and Handling
    17
  - Write-Protect Option
    18
  - Floppy Disk Loading and Unloading
    18
  - Data Recording Method
    21
  - Peak Shift Precompensation
    22
  - Track Accessing
    22
  - Read Data Timing
    22
  - Write Data Timing
    22
  - Power-On to Data Transfer
    25
3 Theory of Operation

21
- Functional Areas
  25
  - Control System
    25
- Disk Drive General Block Diagram
  26
  - Positioning System
    27
  - Read/Write System
    28
- Mechanical System
  28
  - Drive Mechanism
    28
  - Disk Centering Mechanism
    28
  - Head Load Mechanism
    28
  - Positioning Mechanism
    28
- Disk Centering and Head Load Mechanism
  29
- Positioning Mechanism
  29
- Logic Symbology and Definitions
  30
- Detailed Logic Description
  30
  - Control Logic
    30
- Logic Symbology (Sheet 1 of 2)
  31
- Ramp Generator
  31
- Head Load Relay Driver
  32
  - Read/Write Head Positioning Logic
    35
- Stepper Motor Position Control Simplified Logic Diagram
  36
- Stepper Motor Direction Sequencing
  37
  - Read/Write Logic
    38
- Track 00 Detector Circuit
  38
- Write Channel, Simplified Logic Diagram
  39
- Raw Data Output Gating
  42
  - VDC Regulator Description
    43
- One-Shot Data Decoders
  43
- Read Decoder with PLO Assembly
  44
- RAW and NRZ Read Data Decoder Waveforms
  44
- Read Decoder with PLO Block Diagram
  44
- Data Decoder Waveforms
  44
  - Normal PLO Operation
    45
  - Missing-Pulse PLO Operation
    46
  - Sync-Up PLO Operation
    46
- Data Decoder
  46
- Read Sync
  48
4 Maintenance

52
- Preventive Maintenance
  52
  - Monthly (Covers On)
    52
  - Semiannually (Covers Removed)
    52
- Disk Drive Exerciser
  52
- Maintenance Procedures
  54
  - Tools and Test Equipment
    54
  - Plugs and Jacks
    54
  - PWB Assembly Data and Control
    55
  - PWB Replacement
    55
  - Power
    55
  - Drive System
    56
  - Position System
    60
  - Read/Write System
    62
  - Data Decoder with PLO Board Adjustments
    65
5 Illustrated Parts Breakdown

67
- Group Assembly Parts List
  67
- Part Number
  67
- Description
  67
- Quantity Per Assembly
  67

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