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140
Calcomp 140 Floppy Disk Drive Manuals
Manuals and User Guides for Calcomp 140 Floppy Disk Drive. We have
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Calcomp 140 Floppy Disk Drive manual available for free PDF download: Technical Manual
Calcomp 140 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
Controls~ Indicators~ and Test Points
52
Preparation for Offline Checkout
52
Disconnecting the Exerciser
54
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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