Broadcast Electronics 3000 Series - Page 133

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BROADCAST

ELECTRONICS,

INC.

The

NAB

Tape

Cartridge

and

Its

Maintenance

TABLE

CONTENTS

PAGE

NO.

The

NAB

Tape

Cartridge

Maintenance Tips

Cartridge Recording Procedure

Cartridges in Stereophonic Systems

Main Page

Table of Contents4
Section I6
Introduction6
Genera 1 Description6
Equipment Identification6
Specifications8
Installation10
Desk Mounting10
Rack Mounting10
Filler Panels10
Audio Output Connections10
Audio Input Connections10
Optional Microphone Input12
Remote Control Connections12
Recorder-Reproducer Remote Control13
Power Connections13
Operation14
Playback15
Recording15
Optional Auxiliary Cue Tones (Q-Trips)16
Delay Option17
Theory of Operation18
Playback/Logic Board Circuit Description18
Configuration18
Program Circuitry18
Cue Track Audio and One Kilohertz Stop Sensor19
Optional Three Kilohertz Stop Sensor19
Optional Q-Trip Sensors20
Stop/Start Logic20
Power Supply Board20
Configuration20
Voltage Supp 1 I es21
Solenoid Control21
Fast Forward and Q-Trip Relays21
Record Amplifier/Bias Board22
Configurations22
Bias Oscillator23
Program Track Record and Bias Control Circuitry23
Cue Circuitry Bias Control24
Record Control and Tone Generator Board24
Configurations24
Record Logic Flip-Flop25
One Kilohertz Stop Cue Generator and Control25
Auxiliary Cue Tone Generators and Control26
VU Meter Amp 1 I Fi er27
Delay Option27
Routine Maintenance28
Extender Board28
Component Replacement on Printed Circuit Boards28
Module Locations and Adjustment Points29
Electronic Adjustments29
General29
Program Playback Adjustments30
Output Level30
Playback Equalization30
VU Meter Calibration (Record Units Only)30
Cue Sensitivity Adjustment30
Program Record Adjustments31
Bias Trap Tuning31
Program Bias Level31
VU Meter Calibration32
Record Equalization32
Cue Record Adjustments32
Bias Trap Tuning32
Cue Bias Level32
Cue Tone Generator Frequency32
Mechanical Adjustment and Maintenance32
Mechanical System33
Maintenance33
Cleaning33
Demagnetizing33
Cartridge Maintenance33
Mechanical Parts Replacement34
Motor Replacement34
Pressure Roller Replacement35
Power Transformer Replacement35
Tape Head Replacement35
Solenoid Replacement35
Solenoid Chain Replacement36
Solenoid Plunger Adjustment36
Tape Deck Adjustments36
Pressure Roller Adjustment36
Release Speed Adjustment37
Tape Head Alignment37
General37
Tracking Height and Zenith37
Azimuth38
Stereo Phasing Test38
Parts List and Drawings40

Broadcast Electronics 3000 Series - Page 133

Table of Contents