OTARI MX-5050 BIII-2 User Manual

MX-5050mkIV-2, BIII-2
Master Tape Recorder
Operation and Maintenance Manual
Fifth Edition
Part No. OS3-298-
Ed5 1999-02 (WM)
1. Introduction
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1
1.1 The New MX-5050 Series
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1
1.2 Specifications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
2. Installation
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2.1 Unpacking and Inspection
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4
2.2 Audio Signal Connection
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2.2.1 Audio Connectors
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2.2.2 Balanced/Unbalanced Connection
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2.3 Switch Position Adjustment
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2.4 PCB Assembly Location
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2.4.1 MX-5050BIII
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2.4.2 MX-5050MKIV-2
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2.5 Power Connection
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2.6 Fuse Replacement
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2.7 Speed Conversion (BIII)
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2.8 Equalization Change
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3. Controls and Indicators
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3.1 Tape Transport
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3.2 Transport Control Panel
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3.3 Head Assembly
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3.4 Amplifier Panel
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3.5 Audio Connector Panel
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3.6 Connector Pin Assignment
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4. Operation
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4.1 Operation Mode Reference Tables
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4.2 Modes of Operation
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4.2.1 Transport Modes
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4.2.2 Audio Channel Modes
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4.3 Operating the MX-5050
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4.3.1 Placing Reels on the Machine
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4.3.2 Threading the Tape
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4.4 Operation of the Transport
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4.4.1 Playing Back the Tracks
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4.4.2 Recording the Tracks
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4.4.3 Sel·Rep Recording
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4.4.4 Fast Wind and Cue Monitor
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4.4.5 Tape Editing
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4.4.6 Using the Pitch Control Feature
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4.5 Locator Operation
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4.5.1 Storing Tape Locations
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4.5.2 Search Mode
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4.5.3 Search Play Mode
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4.5.4 Search Zero Mode
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4.5.5 Search Start Mode
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4.5.6 Repeat Mode
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4.6 Test Oscillator
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5. Maintenance
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5.1 Maintenance Scheduling
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5.2 Demagnetizing
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5.3 Cleaning the Tape Path
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5.4 Lubrication
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6. Transport Adjustment and Parts Replacement
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6.1 Transport Access
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6.2 Brake Torque Adjustment
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6.3 Tape Lifter Adjustment
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6.4 Capstan Motor Adjustment and Pitch Control Adjustment
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6.5 Pinch Roller Pressure Adjustment
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6.6 Tape Speed Adjustment
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6.7 Reel Table Height Adjustment
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6.8 Head Assembly Replacement
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6.9 Head Position Adjustment
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7. Audio Alignment
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7.1 Tools and Equipment Required
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7.2 Preliminary Adjustments
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7.2.1 Peak Indicator Level Adjustment
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7.2.2 Test Oscillator Waveform and Level Adjustment
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7.3 Reproduce Adjustments
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7.3.1 Reproduce Head Azimuth Adjustment
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7.3.2 Reproduce Level Adjustment
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7.3.3 Reproduce Equalization Adjustment
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7.4 Record Electronics Adjustments
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7.4.1 Record Bias Level Adjustment
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7.4.2 Record Head Azimuth Adjustment
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7.4.3 Record Level Adjustment
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7.4.4 Record Equalization Adjustment
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7.4.5 Low Frequency Reproduce Equalization Adjustment
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7.4.6 Sel·Rep Level Adjustment
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Appendix
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Table of Contents

OTARI MX-5050 BIII-2 Specifications

General

Brand	OTARI
Model	MX-5050 BIII-2
Category	VCR
Language	English

Summary

Introduction

1.1 The New MX-5050 Series

Overview of the different models within the MX-5050 Series.

1.2 Specifications

Technical specifications including track configuration, heads, motor, speed, and dimensions.

Installation

2.1 Unpacking and Inspection

Procedures for unpacking and inspecting the equipment for damage.

2.2 Audio Signal Connection

Details on connecting audio signals, including connector types and pin assignments.

2.3 Switch Position Adjustment

Guide to setting various switches on the rear panel and control PCB.

2.4 PCB Assembly Location

Instructions for accessing and rotating PCB assemblies for adjustments.

2.5 Power Connection

Procedures for connecting the power cable and AC voltage connector.

2.6 Fuse Replacement

Step-by-step guide for replacing blown fuses with correct types.

2.7 Speed Conversion (BIII)

Instructions to change the speed version of the BIII-2 model.

2.8 Equalization Change

How to change equalization settings between NAB and IEC standards.

Controls and Indicators

3.1 Tape Transport

Identification and description of tape transport components.

3.2 Transport Control Panel

Explanation of buttons and displays on the transport control panel.

3.3 Head Assembly

Details about the erase, record, and reproduce heads.

3.4 Amplifier Panel

Description of controls and indicators on the amplifier panel.

3.5 Audio Connector Panel

Overview of the audio input/output connector panel layout.

3.6 Connector Pin Assignment

Detailed pin assignment for the Parallel I/O connector.

Operation

4.1 Operation Mode Reference Tables

Tables summarizing transport, audio channel, and locator modes.

4.2 Modes of Operation

Explanation of Transport Modes and Audio Channel Modes.

4.3 Operating the MX-5050

Procedures for placing reels and threading tape onto the machine.

4.4 Transport Operations

Detailed procedures for playing, recording, editing, and pitch control.

4.5 Locator Operation

Guide to using the auto locator functions like storing points and searching.

4.6 Test Oscillator

How to use the built-in two-frequency test oscillator.

Maintenance

5.1 Maintenance Scheduling

Suggested schedule for routine maintenance tasks.

5.2 Demagnetizing

Procedure and precautions for demagnetizing the tape heads.

5.3 Cleaning the Tape Path

Instructions for cleaning all parts of the tape path to ensure performance.

5.4 Lubrication

Guidance on lubricating the Capstan Motor bearing.

Transport Adjustment and Parts Replacement

6.1 Transport Access

Instructions on how to access internal transport parts.

6.2 Brake Torque Adjustment

Procedure for measuring and adjusting brake torque for supply and take-up reels.

6.3 Tape Lifter Adjustment

How to adjust the gap between the tape lifters and the tape.

6.4 Capstan Motor Adjustment and Pitch Control Adjustment

Adjusting capstan motor speed and pitch control for accurate playback.

6.5 Pinch Roller Pressure Adjustment

Procedure for adjusting pinch roller pressure for proper tape contact.

6.6 Tape Speed Adjustment

Steps to measure and adjust tape speed using a test tape.

6.7 Reel Table Height Adjustment

How to adjust the height of the reel tables for proper reel placement.

6.8 Head Assembly Replacement

Procedure for replacing tape head assemblies.

6.9 Head Position Adjustment

Adjusting head height, zenith, and wrap for optimal tape contact.

Audio Alignment

7.1 Tools and Equipment Required

List of necessary tools and alignment tapes for audio setup.

7.2 Preliminary Adjustments

Adjusting peak indicator levels and test oscillator output.

7.3 Reproduce Adjustments

Aligning reproduce head azimuth, level, and equalization.

7.4 Record Electronics Adjustments

Adjusting record bias, azimuth, level, and equalization for optimal recording.

Appendix

Troubleshooting Hints (Transport)

Diagnostic flowcharts for transport-related issues.

Troubleshooting Hints (Electronics)

Diagnostic flowcharts for electronics-related issues.