Studer Revox A77 tape sm
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Extracted text from Studer Revox A77 tape sm (Ocr-read)
Page 1
Service Manual
nEVox
A71-SYEIEO»VA£11:
Printed in Switzeriand 1018.16 10484 10th Edition)
Page 2
1. CONTENTS
2. GENERAL
2.1.
Front Panel Rear Panel
3. DISMANTLING
3.1.
3.2.
3.3.
3.4.
3.5.
3.6.
3.7.
3.8.
3.9
3.10.
3.11.
3.12.
3.13.
Removal of Housing
Removal of Cover Panel
Removal of Front Panel
Removal of Power Switch
Removal of Brake Unit
Removal of Reel Motors
Removal of Capstan Motor
Removal of Control Board
Removal of Power Transformer
Removal of Amplifier Cards
Removal of Potentiometer
Removal of Switch Board
Removal of Frame ( Removal of Rotary Switches)
4. MECHANICS
4.1.
4.2.
4.3.
4.4.
4.5.
4.6.
4.7.
4.8.
Headblock
4.1.1. Tape Guides
4.1.2. Head Mounting
Tape Tension
Brakes ( Stop )
4.3.1. Brake Torque Measurement
4.3.2. Brake Adjustment
Pressure Roller
4.4.1. Pressure Measurement
4.4.2. Pressure Solenoid Readjustment
4.4.3. Exchange of Pressure Roller
4.4.4. Pressure Lever Readjustment
Capstan Motor
4.5.1. Removal of Capstan Axis, Ball Bearings
Exchange of Reel Motor Bearings
Lubrication
End-of»Tape Switch
5. ELECTRONICS
5.1.
5.2.
5.3.
5.4.
5.5.
5.6.
5.7.
5.8.
5.9.
5.10.
Switch Board and VU-Meter Board
input Amplifier
Record Amplifier
Oscillator
Record Relay
Playback Amplifier
Power Amplifier ( Loudspeaker Amplifier)
Power Supply
Drive Control
5.9.1. Photoelectric End-of-Tape Switch
Speed Regulation, Capstan Motor
6. ELECTRICAL ADJUSTMENTS AND MEASUREMENTS
6.1.
6.2.
Demagnetizing
Tape Speed
62.1. Pick-up Head » Adjustment
6.2.2. Tacho Adjustment
6.2.3. Tacho Adjustment with Cathode-Ray Oscilloscope
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