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Revox Manuals
Tape Deck
A77
Service manual
Table Of Contents - Revox A77 Service Manual
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Also See for A77
:
Service manual
(92 pages)
,
Operating instructions manual
(56 pages)
,
Operating lnstructions
(31 pages)
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
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Table of Contents
Contents
3
Technical Details
6
Dimensions Walnut Cabinet, Carrying Case, Chassis
7
Color Code
7
Dismantling
8
Removal Of Cover, Front Panel
8
Removal Of Housing, Power Switch
8
Removal Of Brake Unit
9
Removal Of Reel Motors
9
Removal Of Capstan Motor, Control Board
10
Removal Of Power Transformer
11
Removal Of Amplifier Cards
11
Removal Of Potentiometer
12
Removal Of Switch Board
12
Removal Of Frame
13
Mechanics
14
Hadblock, Tape Guides
14
Head Mounting
14
Tape Tension
15
Brake Torque Measurement
15
Brake Adjustment
15
Pressure Solenoid Readjustment
16
Pressure Roller, Pressure Measurement
16
Exchange Of Pressure Roller
16
Pressure Lever Readjustment
16
Capstan Motor With Ball Bearing
17
Removal Of Capstan Axis, Ball Bearings
17
Exchange Of Reel Motor Bearings
18
Lubrication
18
End-Of-Tape Switch
18
Electronics
19
Block Diagram
19
Switch Board And Vu-Meter Board
20
Input/Record Amplifiers
21
Record Relay
22
Playback Amplifier
22
Power Amplifier, Power Supply
23
Drive Control
24
Photoelectric End-Of-Tape Switch
25
Speed Regulation, Capstan Motor
25
Electrical Adjustments And Measurements
28
Demagnetizing
28
Tape Speed
28
Playback Adjustment
28
Azimuth Adjustment, Playback Head, Coarse
29
Playback Level From Test Tape
29
Frequency Characteristic, Playback
29
Oscillator And Rf - Adjustments
30
Rf - Voltages And Frequency Checking
30
Dummy Load
30
Rf - Tapes, Record
30
Record - Adjustments
31
Rf - Traps, Playback, Bias
31
Azimuth Adjustment, Record Head, Coarse
31
Distortion Factor Measurements
32
Azimuth Adjustment, Record Head, Fine
32
Record Level, Record Equalization
32
Frequency Characteristic Via Tape
32
Noise Voltage (And External Voltage) Via Tape/Before Tape
33
Erase Attenuation
34
Crosstalk, Mono/Stereo
34
Output Voltage Check
35
Wow And Flutter
35
Accessories
36
Remote Control
36
Operation With A Timing Clock
36
Modifications
37
Rewind Switch Noise, Rfi, Transfer Play Sensivity
37
Replacement Of Capstan Motor, Removal Of Capstan
37
Capstan Motor With Sleeve Bearings, Shaft And Low-Friction Thrust Washer
37
Troubleshooting
38
Faults In The Drive
38
Faults In Circuitry
41
Tape Speed Calibration
44
Power Supply Alimentation
47
Switch Board, Vu - Meter Board Overview
51
Input Amplifier
54
Frequency Characteristics: Record Amplifier
57
Equalization
58
Oscillator
60
Record Relay Overview
63
Playback And Drive Amplifier
66
Loudspeaker Amplifier
69
Speed Control
73
Replacement Parts List
76
Revox A77-Dolby
92
Circuit Operation: Record Processor 1.077.853
92
Use Of The Dolby Circuit In The Tape Recorder
94
Matching And Mismatching
95
Alignment Instructions Revox A-77 Dolby
97
Function Diagram A77 Dolby
99
Playback Processor Diagram
100
Record Processor Diagram
103
Interconnection
107
Switch Board Printed Side
110
Vu-Meter Board
110
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Table of Contents
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