TU56 DECtape Transport Maintenance Manual

Chapter 1 General Information
- 1.1 Introduction
- 1.2 Specifications
- 1.3 Options
- 1.4 Major Assemblies and Systems
  - 1.4.1 Controls and Indicators
  - 1.4.2 Tape Motion System
  - 1.4.3 Power Supply
Chapter 2 Installation
- 2.1 Unpacking and Inspection
- 2.2 Mechanical Installation
  - 2.2.1 Mounting Support Plate Bracket and Spacer Block Installation
  - 2.2.2 Spacer Support Bracket Installation
  - 2.2.3 Transport Installation
- 2.3 Electrical Installation
- 2.4 Operation
  - 2.4.1 Tape Loading and Unloading
  - 2.4.2 On-Line Operating Procedures
Chapter 3 Theory of Operation
- 3.1 Interface
  - 3.1.1 Input Interface Lines -- Command Cable -- A06/A07
    - 3.1.1.1 Select 0-7
    - 3.1.1.2 CON STOP
    - 3.1.1.3 CON GO
    - 3.1.1.4 CON REV REM
    - 3.1.1.5 CON FWD REM
    - 3.1.1.6 CON ALL HALT
    - 3.1.1.7 CON PWR UP DLY
  - 3.1.2 Output Interface Lines -- Command Cable -- A06/A07
    - 3.1.2.1 Select Echo
    - 3.1.2.2 Write Echo
  - 3.1.3 Bi-Directional Interface Lines -- Information Cable -- AB10/AB11
    - 3.1.3.1 Timing Track (TT)
    - 3.1.3.2 Mark Track (MT)
    - 3.1.3.3 Data Tracks (D0-D2)
- 3.2 Functional Information
  - 3.2.1 Read/Write Head
  - 3.2.2 DECtape Format
- 3.3 Local (off-line) Operation
  - 3.3.1 Forward Tape Motion
  - 3.3.2 Hold Tape Motion
  - 3.3.3 Reverse Tape Motion
- 3.4 Remote (on-line) Operation
  - 3.4.1 Tape Transport Addressing
  - 3.4.2 Error Checks
    - 3.4.2.1 Select Echo
    - 3.4.2.2 Write Echo
  - 3.4.3 Tape Motion Control
  - 3.4.4 Write Operation
  - 3.4.5 Read Operation
- 3.5 Module Description
  - 3.5.1 G847 Dual Motor Voltage Control
  - 3.5.2 G848 Motor Control Module
  - 3.5.3 G859 Clock Regulator Module
  - 3.5.4 G888 Manchester Reader/Writer Module
Chapter 4 Maintenance
- 4.1 Recommended Tools and Test Equipment
- 4.2 Preventive Maintenance
  - 4.2.1 Weekly PM Procedure
  - 4.2.2 Monthly PM Procedure
  - 4.2.3 Tape Care and Cleaning
- 4.3 Corrective Maintenance
  - 4.3.1 Control Panel Lamp Replacement
  - 4.3.2 Reel Motor
    - 4.3.2.1 Motor Removal
    - 4.3.2.2 Motor Replacement
    - 4.3.2.3 Reel Hub Clearance Adjustment
    - 4.3.2.4 Reel Motor Electronic Brake Adjustment
    - 4.3.2.5 40 Hz Oscillator Adjustment
  - 4.3.3 Read/Write Head
    - 4.3.3.1 Head Removal
    - 4.3.3.2 Head Replacement
    - 4.3.3.3 Head Output Check
    - 4.3.3.4 Head Skew Check and Adjustment
    - 4.3.3.5 Write Enable Circuit Check
- 4.4 Troubleshooting
  - 4.4.1 Initial Checks
  - 4.4.2 Signal Source and Termination Tests
- 4.5 Recommended Spare Parts
Appendix A Reference Drawings

Company:	Digital Equipment Corporation
Part:	DEC-00-HRTC-D
Date:	1972-07
Keywords:

Address:	http://wwcm.synology.me/pdf/DEC-00-HRTC-D TU56 DECtape Transport Maintenance Manual.pdf
Site:	Wilber Williams' Computer Museum
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Address:	http://bitsavers.org/pdf/dec/dectape/tu56/DEC-00-HRTC-D_TU56_Mantenance_Manual_Jan73.pdf
Site:	Al Kossow's Bitsavers
Format:	PDF
Size:	3854073 bytes (3.7 MiB)
Notes:	Second printing, 1973-01, corrects one missing graphic

Address:	http://bitsavers.org/pdf/dec/dectape/tu56/DEC-00-HRTC-D_TU56_Mantenance_Manual_Jul72.pdf
Site:	Al Kossow's Bitsavers
Format:	PDF
Size:	3558687 bytes (3.4 MiB)

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TU56 DECtape Transport Maintenance Manual

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