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TK50
Technical manual
Digital Equipment TK50 Technical Manual
Tape drive subsystem
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Contents
Table of Contents
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Table of Contents
Table of Contents
Chapter 1 Introduction and Specifications
Gene R a 1
TK50 Tape Drive Unit Specifications
Drive to Controller Interface Specifications
TK50 Related Documentation
Chapter 2 Drive Unit Theory of Operation
General
Unit Designations
Drive Unit Variations
M7546 Controller
Cabling
Power
Physical Description
Appendix A Tqkso Detailed Block Diagram, Tkso Exploded View
Appendix B Tkso Subsystem Error Codesand Status
Desktop TK50
Drive Board
Block Diagram: Drive Board
Tape Transport
Controls and Indicators
TK50 Tape Drive Transport
Load Procedures
TK50 Front View
Unload Procedures
Lights
States of Lights
Drive Board Description
Write Data Chain
Write Erase
Write Head Selection
TK50 Rear View
DC Low Circuit
Volt Path
Low Voltage Effect
DAC Reference Voltage Generation Circuit
Automatic Gain Control Circuit
Read Head Select Circuitry
Read Amplifier Circuit
Phase Lock Loop Circuit
Pump down Circuit
Pump up Circuit
Pump up and Pump down Signal Generation
Data Detection
Drive Commands and Status
Tape Hub
Link Arms
Tape Cartridge Insertion
Tape Load to Beginning of Tape
Tape Motion
Read/Write Head
Initialization: Writing and Reading CALTRACKS
Wr I T I Ng da Ta
Physical Tape Configuration
Recording Direction
Differential Signal Pair Description
Signal Interface Timing
Differential Signal Pairs
Signal Interface Timing {A-P
Signal Interface Timing {Q-U
Serial Controller to Drive Communications
Basic Controller/Drive Communications Protocol
Frame Format of Data Coming from Controller
Contro11Er-To-Drive Command Protocol
Drive-To-Contro1Ler Status Protocol
Change of Dri Ve Sta te
Drive Detected Errors
TK50 Commands
TK50 Command S
TK50 Drive States
Drive State Status
Non-Error Drive States
Done
Dropou T Sensed
Enable Write Gate
Load/Run State Change
Send Status Byte Bit Assignments
Track Boundary
Drive Error Status
Chapter 3 Drive Unit Repair
General
Failure to Load to Beginning of Tape
Failure to Load Tape into Cartridge
General Motor or Tachometer Failure
Motor a Failure
Motor B Failure
Drive Lost Control of Tape or Bad Tachometer
Excessive Drag in Tape Transport
Failure to Stop Tape or Remain Stopped
Cartridge Insert Error
Cartridge Extract Error
Move Errqr
Deceleration Error
Check Byte Error
Unload Error
8155 Memory Error
8155 Timer Error
Read Head 1 Error
Read Head 2 Error
Cartridge Insert/Extract Error
BOT Sensed in Read/Write/Seek State
TQK50 High Level Block Diagram
Miscellaneous Control Register Bit Assignments
Common Jumper Pack Settings
Floating CSR Address Chart
Unit Number Switch Pack Settings
Revision Level Switch Pack
Q-Bus Timing
Read Data Timing
Drive Error Sub-Code Values
Controller Internal Status Byte
Drive Error Code Byte
Unrecoverable Drive Faults
Controller Specific SA Error Codes
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EK-OTKSO-TM-001
.. TK50 Tape Drive
Subsystem
Technical Manual
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