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OTARI MTR-90 Operating And Maintenance Manual

Master tape recorder

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Operating and maintenance manual (190 pages)

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Table of Contents

Table of Contents
Introduction
Otari Mtr-90 Master Tape Machine
MTR-90 Master Tape Recorder
Tape Transport Controls
Cue Button and Cue Control Knob
VU Meter Panel
MTR-90 Upper and Lower Circuit Card Cages
Installation
Preliminary
Inspection
Reproduce EQ Selection
Cue Level Attenuation Selection
Auto Locator and Remote Control Box
Connections
Remote Cable for Transport Logic
Two Remote Cables for Mode Switching
Logic Cable for Optional Auto Locator
AC Power Cord
NR Remote Connector Pin Assignment
Basic Operation and Functional Checkout
Transport Functional Checkout
Reel Installation
Powering up
Thread Tape
Initialize the Servos
Load the Servos
Tape Threading Path
MTR-90 Transport Features and Controls
Select the Tape Speed
Check Play Mode
Check Fast Winding Modes
Normal Cue Mode
Fast Cue Mode
Head Shields
Tape Unload
Spot Erase
Remote Control Box and Audio Electronics Functional Checkout
Remote Transport Controls
Speed Mode Selection
Remote Box Features
Speed Display and Coordinate Switches
Ready/Safe Switches
Record Button
Individual Channel Output Drive Selection
INPUT Mode
SEL-REP Mode
REPRO Mode
Master Output Drive Selection
Audio Alignment
General Description
Demagnetizing the Heads and Tape Guidance Path
Demagnetizing Caution
Cleaning the Tape Path
Repro Amp Alignment
Sync Amp Alignment
Bias Alignment
Record Alignment
Phase Compensation
Record Section
Gain Structure
Phase Compensation Adjustment
MTR-90 Block Diagram
Transport Alignment
Head Geometry
Repro Head Azimuth
Record Head Azimuth
Transport Cover Plate Removal & Replacement
Transport Deck Flip-Up
Replacement
Transport Cover Plate Removal
Swing Arm Travel
Swing Arm Travel Limit Adjustment
Tape Arming Solenoids
Fast/Forward/Rewind Damping Solenoids
Swing Arm Tension
Tape Lifter Mechanism
Tape Lifter Adjustment(S)
Brakes
Measuring Brake Tension
Brake Tension Adjustment Nut
Brake Tension Adjustment
Reel Turntable Height
Reel Turntable Height Adjustment
Reel Tension Servo
Upper and Lower Limit Adjustment
Preliminary Center Position and Gain Adjustments
Tape Tension Check
Reel Motor Tracking of Capstan
Fine Adjustment of Position and Gain
Reel Size Detector Adjustment
Capstan Servo
Output Waveform
Location of the Capstan Tachometer PC Board
Capstan Tachometer Adjustment
Adjustment of Capstan Control PCB Assembly
Adjustment of PLAY GAIN
Adjustment of PLAY DUMP
Adjustment of FAST GAIN and DAMP
Capsstan Control Circuit Board, Adjustments
Adjustment of Transport PCB Assembly
Adjustment of Master CPU PCB Assembly
Adjustment of I/O PCB Assembly
Adjustment of Cue Tone Filter
Output Waveform at the Test Point
Adjustment of Fast Wind Speed
Adjustment of Cue Speed
Adjustment of Bias Control PCB Assembly
Adjustment of Bias Output
Adjustment of Erase Output
Adjustment of Test Signal Level
Operation
General
Recording Initial Tracks
Playback of Initial Tracks
Sel-Rep Recording (Overdubbing)
Sel-Rep Recording (Punch-Ins)
Rehearsal of Overdubs and Punch-Ins
To End the Punch-In
Mixdown
Use of the Cue Button and Knob
Use of the Variable Speed Mode
Use of an External Speed Reference
About Smpte Location Control and Synchronization
Voltage Conversion
Frequency Conversion
BCD out
Serial I/O
Auto Locator
Auto Locator Front Panel Features
Tape Time
Locate Time
Stop Watch
Keyboard Numerals
Shift Left and Shift Right
Load
Memory Store
Memory Recall
+/- Key
Direct Store, Direct Search and All Clear
How to Cancel Memories
Zero Set
Search Zero
Search
Shuttle
Auto Rewind
Transport Controls
Examples of Auto Locator Operation
Store a Cue for Future Recall
Illegal Commands
16/24 Track Conversions
Circuit Descriptions
Playback Head and Preamp
Speed Selection and High Frequency Playback Equalization
Low Frequency Playback Equalization
Sync Playback
Output Stage
Input Circuitry
Audio/Bias Mixing Circuitry
Erase Head Driver
Reel Control Board
Maintenance
Transport Mechanical & Electro-Mechanical
Removing and Reinserting Printed Circuit Boards
Reel Motor Replacement
Brake Pad Replacement
Meter or Meter Lamp Replacement
Capstan and Tacho Roller Replacement
Head Shield Position Adjustment
Cleaning and Lubrication
Head Shield Screw (Worm)
Specifications
Tape Transport
Electronics
Physical
Accessories

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053-039

TR-90

MASTER TAPE RECORDER

OPERATING AND MAINTENANCE MANUAL

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