Shugart SA860 Manuals

Manuals and User Guides for Shugart SA860. We have 2 Shugart SA860 manuals available for free PDF download: Service Manual, Owner's Manual

Shugart SA860 Service Manual (126 pages)

Sigle/Double-Side Half Height diskette storage drive

Brand: Shugart | Category: Storage | Size: 40.21 MB

Table of Contents
5
List of Figures
7
Section I Introduction
9
- General Description
  9
- Specifications Summary
  9
- Functional Characteristics
  11
  - Electronics
    11
  - Drive Mechanism
    11
  - Positioning Mechanism
    12
  - Read/Write Heads
    12
  - Recording Formats
    12
- Functionaloperations
  12
  - Power Sequencing
    12
  - Drive Selection
    12
  - Motor on
    12
  - Track Accessing
    14
  - Step out
    14
  - Step in
    14
  - Side Selection (Sa8600Nly)
    15
  - Read Operation
    16
  - Write Operation
    17
  - Sequence of Events
    18
Electrical Interface
19
- Introduction
  19
- Signal Interface
  19
  - Input Lines
    19
  - Input Line Termination
    21
  - Drive Select
    21
  - Side Select (SA860 Only)
    21
  - Direction Select
    22
  - Step
    22
  - Write Gate
    22
  - Write Data
    22
  - Motor on (Alternate Input)
    22
  - In Use (Alternate Input)
    22
  - External Write Current Switch (Alternate Input)
    22
  - Output Lines
    23
  - Track 00
    23
  - Index
    23
  - Sector (Hard Sector Only)
    23
  - Ready
    23
  - Read Data
    24
  - Sep Data
    24
  - Sepclock
    24
  - Write Protect
    24
  - True Ready
    24
  - Disk Change (Optional Output)
    24
- Frame Ground
  24
Physical Interface
27
- Introduction
  27
- J2/P2 Connector
  28
Theory of Operations
29
- Generaioperations
  29
- Read/Write Operations
  29
- Read/Write Head
  29
- Write Circuit Operation
  32
- Read Circuit Operation
  33
- Drive Motor Control
  34
- Track Accessing
  34
  - Stepping
    34
  - Carriage Actuator
    34
  - Actuator Control Logic
    35
  - Track Zero Indicator
    37
  - Stepper Timing
    37
Section V Maintenance
39
- Maintenance Equipment
  39
  - Alignment Diskette
    39
  - SA809 Exerciser
    39
  - Special Tools
    39
- Diagnostic Techniques
  40
  - Soft Error Detection and Correction
    40
  - Write Errors
    40
  - Read Errors
    40
  - Seek Errors
    40
- Trouble-Shooting
  40
- Write Protect Inoperative
  41
- Adjustments
  43
  - Side 1 Downstop Adjustment (SA860 Only)
    43
  - Head Radial Alignment
    43
  - Side 1 Downstop Adjustment
    43
  - Motor Plate Mounting Screws
    44
  - Read/Write Head(S) Azimuth Check
    45
  - Azimuth Burst Patterns
    45
  - Head Amplitude Check
    46
  - Track 00 Detector Assembly
    46
  - Track 00 Carriage Limiter
    46
  - Index Sector Timing
    46
  - Door Lock
    47
  - Track 00 Carriage Limiter Clearance
    47
  - Ejector/Bail
    48
  - Diskette Stop Clearance
    48
  - Stepper Motor
    49
  - Bail Assembly Adjustment
    49
  - Stepper Motor Adjustment
    49
- Removals and Replacements
  50
  - Faceplate and Door Knob
    50
  - Drive Motor Assembly
    50
  - Top Plate Assembly
    50
  - Spindle Hub Assembly
    51
  - Drive Motor Assembly
    51
  - PCB Assembly
    52
  - Door Lock Assembly
    52
  - Side 1 Arm Assembly (Sa8600Nly)
    52
  - Head and Carriage Assembly
    52
  - Clamp Hub Assembly
    53
  - Bail Assembly
    53
  - Track 00 Detector
    53
  - Index/Sector LED Assembly
    53
  - Index/Sector Detector Assembly
    54
  - Head Radial Alignment
    55
  - Schematic Diagram. PCB 25227 (4 Sheets)
    57
  - Logic Equivalent PIN 16271. Location U13
    57
  - Logic Equivalent PIN 51420. Location U14
    57

Shugart SA860 Owner's Manual (62 pages)

Single/Double-Sided Half-Height Diskette Storage Drives

Brand: Shugart | Category: Computer Hardware | Size: 2.77 MB

Table of Contents
2
Section I Introduction
8
- General Description
  8
- Specifications Summary
  8
- Functional Characteristics
  10
  - Electronics
    10
  - Drive Mechanism
    10
  - Positioning Mechanism
    11
  - Read/Write Heads
    11
  - Recording Formats
    11
- Functional Operations
  11
  - Power Sequencing
    11
  - Drive Selection
    11
  - Motor on
    11
- SA810/860 Functional Diagram
  12
  - Track Accessing
    13
  - Step out
    13
  - Step in
    13
- Track Access Timing, Standard Seek
  13
  - Side Selection (SA860 Only)
    14
- Track Access Timing, Buffered Seek
  14
- Read Initiate Timing
  14
  - Read Operation
    15
- Read Signal Timing (FM Encoding)
  15
- FM and MFM Code Comparisons
  15
  - Write Operation
    16
- Write Initiate Timing
  16
  - Sequence of Events
    17
Electrical Interface
18
- Introduction
  18
- Signal Interface
  18
  - Inputlines
    18
  - Input Line Termination
    20
  - Drive Select 1-4
    20
  - Side Select (SA860 Only)
    20
- Interface Signal Driver/Receiver
  20
  - Direction Select
    21
  - Step
    21
  - Write Gate
    21
  - Write Data
    21
  - Motor on (Alternate Input)
    21
  - In Use (Alternate Input)
    21
  - External Write Current Switch (Alternate Input)
    21
  - Output Lines
    22
  - Track 00
    22
  - Index
    22
  - Sector (Hard Sector Only)
    22
  - Ready
    22
- Index Timing
  22
- Sector Timing
  22
  - Read Data
    23
  - Sep Data
    23
  - Sepclock
    23
  - Write Protect
    23
  - True Ready
    23
  - Disk Change (Optional Output)
    23
  - Two Sided (Optional Output)
    23
  - Alternate I/O Pins
    23
- Power Interface
  23
- Frame Grounding
  24
- DC Power Profile
  24
Physical Interface
26
- Introduction
  26
- J2/P2 Connector
  27
Section IV Drive Physical Specifications
28
- Introduction
  28
- Mechanical Dimensions
  28
- Mounting
  28
- Stacking Dual Drives
  28
- Physical Dimensions
  29
Error Recovery
30
- Write Errors
  30
- Read Errors
  30
- Seek Errors
  30
Recording Format
32
- Recording Format (Single Density)
  32
  - Bit Cell
    32
- Data Pattern
  32
  - Byte
    33
  - Recording Format (Double Density)
    33
- Data Bytes
  33
  - Rules of Encoding
    34
    
    FM Encoding
    34
    
    MFM Encoding
    34
  - Tracks and Recording Formats
    34
    
    Tracks
    34
    
    Track Format
    34
    
    Hard Sector Recording Format
    34
    
    Soft Sector Recording Format
    34
    
    Typical Track Index Format
    34
- FM and MFM Encoding
  35
- SA810/860 Hard Sector Recording Format (FM)
  35
- MFM Track Format Comparison
  36
- MFM Index Pre Address Mark
  37
- Index Address Mark FM
  37
MFM Index Address Mark
38
Address Mark FM
38
MFM Pre ID/Data Address Mark
39
Data Address Mark FM
39
Deleted Data Address Mark FM
39
MFM Data Address Mark
40
MFM Deleted Data Address Mark
40
Customer Installable Options
42
Radial Ready Circuit
51
Write Protect Circuit
51
Operation Procedures
52
Packaging
54
- Pallet Loading
  55
Appendix A Machine Level Code Information
56
Appendix Bordering Information
58

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