3M DELTA Series - Table of Contents

TABLE OF CONTENTS
Page
INTRODUCTION/SPECIFICATIONS ............................. 1-1
A General Description and Features .............. 1-1
B. Delta Specifications ..................................... 1-2.
INSTALLATION AND OPERATION ................................ 2-1
A Unpacking. Handling, and
Pre-Installation Checkout .............................. 2-1
B. Installation ................................................... 2-1
1. Special Consideration for Cooling ....... 2-1
2. Forced Air Cooling — Delta III Units ..... 2-2
C. External Audio Connections ....................... 2-2
D. External Remote Control Connections ..... 2-3
1. Remote Control Specifications .............. 2-3
E. Control and Indicators ............................... 2-6
F. Operational Options ................................... 2-8
1. Ready Lamp Flash ................................. 2-8
2. Repeat Play Lockout .............................. 2-8
3. E.O.M. High Speed Recue ..................... 2-8
4. Reproduce Amplifier Level ................... 2-8
5. Reproduce Output Impedance ............ 2-8
6. Balanced Transformerless Output ......... 2-8
7. Record Input Impedance ..................... 2-8
8, Input Level Strapping ............................ 2-8
9. Differential (Transformerless) Input ..... 2-8
10. Servo Motor Speed ................................. 2-9
MECHANICAL ADJUSTMENTS ....................................... 3-1
A Important Considerations ............................ 3-1
B. Pressure Roller Shaft. Capstan Shaft
Location — Procedure for Delta I
and II Units ..................................................... 3-1
C. Procedure for Delta III Deck Adjustment ... 3-2
D. Pressure Roller Pressure, Solenoid
Adjustment ..................................................... 3-2
E. Solenoid Dampening Adjustment .............. 3-3
F. Cartridge Guidance System Alignment ... .3-3
G. Tape Guide Adjustments ............................ 3-4
H. Head Height and Zenith Adjustment ......... 3-6
I. Monophonic Head Azimuth Adjustment ... .3-7
J. Stereo System Head Azimuth Adjustment ... 3-7
1. Master Reproduce Head Azimuth ......... 3-8
2. Master Record Head Azimuth ................ 3-9
3. Other Reproduce Head Azimuth .......... 3-9
K. Head Replacement ................................. 3-10
Page
ELECTRICAL ADJUSTMENTS ........................................ 5-1
A. General ........................................................ 5-1
B. Reproducer ................................................. 5-1
1. Servo Motor Duty Cycle ........................ 5-1
2. Program Playback Amplifier ............... 5-1
3. Cue Detect Sensitivity .............................. 5-1
C. Recorder ...................................................... 5-1
1. Input Level Strapping ............................ 5-1
2. Program Record Bias ............................ 5-2
3. Program Record Equalization .............. 5-2
4. Cue Bias ................................................... 5-2
5. Cue Master Levels ................................. 5-2
6. Meter Calibration ................................... 5-3
PRINCIPLE OF OPERATION ............................................. 6-1
A Power Supply Systems ................................... 6-1
1. Reproducers ............................................ 6-1
2. Recording Amplifier .............................. 6-1
B. Reproduce Amplifier and Audio Output ...6-2
C. Play Logic .................................................... 6-2
D. Record Logic ............................................... 6-3
1. General .................................................. 6-3
2. Bias Generation ...................................... 6-3
3. Cue Tone Generation ............................ 6-4
4. Head Control .......................................... 6-6
E. Cue Tone Detector ...................................... 6-4
F. Motor Control and Motor ............................ 6-4
G. Solenoid Control ....................................... 6-6
H. Record Amplifier ........................................ 6-6
I. Meter Amplifier ........................................... 6-6
J. Bias Amplifier ............................................. 6-6
ELECTRICAL DRAWINGS AND PARTS LIST ........... 7-1
MAINTENANCE ................................................................... 8-1
A General .......................................................... 8-1
B. Mechanical ................................................. 8-1
C. Electrical ...................................................... 8-1
D. Recommended Tools, Gauges ................... 8-1
E. Test Tapes .................................................... 8-2
WARRANTY .............................................................................. 9-1
PARTS LIST .......................................................................... 10-1
CHANGE INFORMATION ............................................. 11-1
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