Ex-Cell-O Remex RFS4820 Manuals

Manuals and User Guides for Ex-Cell-O Remex RFS4820. We have 1 Ex-Cell-O Remex RFS4820 manual available for free PDF download: Technical Manual

Ex-Cell-O Remex RFS4820 Technical Manual

Ex-Cell-O Remex RFS4820 Technical Manual (151 pages)

DISKETTE SUBSYSTEM

Brand: Ex-Cell-O | Category: Recording Equipment | Size: 8 MB

Table of Contents

Table of Contents
6
Title Page
7
Equipment Description
13
- RFS4810 Flexible Disk Subsystem
  13
  - Rfs48Xo and 24Xo Features
    14
  - Maintenance Equipment Required but Not Supplied
    15
  - Equipment Warranty
    15
  - Specifications
    15
  - Specifications for the RFS4810/4820/2410/2420
    16
  - Diskette
    17
Recording Format
17
- Storage Element Physical Dimensions, Single Sided Diskette
  19
  - Storage Element Physical Dimensions, Two Sided Diskette
    20
  - Maintenance and Reliability
    22
    
    Design Life
    22
    
    Recoverable Read Error
    22
Model Number Designation and Options
22
- Model Number Configurations
  23
- Installation and Interface
  24
- Operation
  31
Non-Recoverable Read Error Rate
22
- Interchangeability
  22
Input-Output Signals
31
Operator Controls
31
Power up Mode
31
Start-Up and Diskette Loading Instructions
31
Modes of Operation
36
- I/O Transaction Sequence
  36
- Master Reset
  36
  - Relative Event Sequence for Read
    42
  - Bootstrap
    43
  - Load Sector Count
    43
  - Read Last Track/Side/Unit/Sector
    43
  - Read Main and Auxillary Status
    43
  - System Ready
    43
  - Connnand
    44
  - Copy
    44
  - Read Data
    44
  - Write Data
    44
  - Format
    45
  - Comparison of a Read
    46
  - Read Ready Status
    46
  - Special Maintenance Commands
    47
  - Power down Mode
    48
- Error Detection and Correction
  48
  - Write Error
    48
  - Read Error
    48
- Initial Checkout
  49
- Theory of Operation
  50
- Block Diagram Description
  50
  - Diskette Drive Mechanism
    50
  - Head Positioning Mechanism
    50
Read/Write Head
51
- Electronics
  51
System.mnemonics
53
- Functional Description
  53
  - Microprocessor System
    53
  - Fd1791 Controller Description
    54
  - Direct Mode Data Flow Operation
    55
  - Direct Read Operation
    56
  - Direct Write Operation
    56
  - Buffer Data Flow Operation
    57
  - Buff er Write Operations
    57
  - Buffer Read Operation
    58
  - Format Operation
    59
  - Drive Select and Signal Mux Circuits
    59
  - Read Circuits and Clock Generator
    60
  - Write Circuits
    62
  - Erase Circuits
    63
  - Step Motor Drive Circuits
    64
  - Index Sector Circuits
    64
  - Write Protect and Track 00 Circuits
    66
  - Power on Reset and Master Reset Circuits
    66
- Slave Drive Circuits
  66
- Signal Mnemonics
  67
General
69
Maintenance
69
Maintenance Procedures
69
- Alignment Diskette
  69
- Maintenance Equipment Required
  69
Read/Write Head Cleaning
70
Read/Write Head Cleaning, RFS24XO Only
70
Read/Write Head Cleaning, RFS48XO Only
70
Electrical Adjustments
72
Troubleshooting
72
Track Alignment
74
- Troubleshooting Chart
  74
Index Alignment
80
Track 00 Switch and Mechanical Stop Adjustment
80
Write Protect Adjustment
82
Read Clock Generator Adjustments
83
Rl CROSSOVER DETECTOR INPUT DC BALANCE ADJUSTMENT
83
Latch Plate/Carrier Adjustment
84
Mechanical Adjustments
84
WRITE PRECOMPENSATION ADJUSTMENT (RFS4810 and RFS2410 ONLY)
84
Diskette Load Arm Adjustment
85
Head Pad Cartridge Assembly Replacement
86
- Diskette Load Arm Adjustment
  86
RFS24XO Only
87
General
88
- Title Page
  88
Parts Replacement
88
Drive Motor Assembly Replacement
89
Motor Drive Belt Replacement
89
Printed Circuit Card Replacement
89
Hub Pulley Replacement
90
Index L.e.D. Assembly Replacement
90
Track 00 Optical Switch Replacement
90
Carrier Assembly Replacement
91

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