Studer A80/VU MkI Tape Machine Manuals

Manuals and User Guides for Studer A80/VU MkI Tape Machine. We have 1 Studer A80/VU MkI Tape Machine manual available for free PDF download: Service Manual

Studer A80/VU MkI Service Manual (319 pages)

Brand: Studer | Category: Tape Deck | Size: 96 MB

Contents
2
Specifications
7
Condensed Operating Instructions
17
Mechanical Assembly
17
Cable Installation
18
Before Connecting Machine to Mains
19
Earthing
20
Function Check
21
Adaptors for 1/4 Machines
21
Amplifier Switching Playback-Record
21
Adaptors for 1/2, 1 and 2 Machines
22
Audio Connections
23
Level
23
Amplifier Remote Control
23
Operation of Push Buttons
24
Timing Indicator
24
Push Button EDIT
24
EDIT Control Knob
25
Fast Tape Start
25
Remote Control for Tape Deck
26
Speed Variation of Capstan Motor
26
Speed Variation Using External Power Supply
27
Tape Transport
28
Removal of Tape Transport Subassemblies
28
Removal of the Aluminum Covers from the Tape Deck
28
Removal of Capstan Motor
30
Removal of Spooling Motors and Breaking Mechanism
30
Removal of Headblock
30
Removal of Pinch Roller Mechanism
30
Removal of Tape Tension Sensor
31
Removal of Tape Guide Roller Left
31
Removal of Tape Guide Roller Assembly Right
31
Removal of Mains and Speed Selector Switch
31
Removal of Mains Unit
32
General Abbreviations
33
Signal Abbreviations
33
Signal Designations
33
Reference Designations
33
Photo Transistor
34
Transistor Connections
34
Micro-Switch Connections
34
Description of Operation of Tape Deck Controls
35
Arrangement of Control Electronics
35
Tape Deck Control
36
Push Buttons
36
Fader-Start
36
Locking
37
EDIT Button
37
Fast Wind Monitoring
38
Automatic Edit Operation
38
Input Attenuator and Preamp
39
Control Logic
39
Tape and Switch
40
Safety Circuit
40
IC Memory and Counter
41
Tape Movement Sensor Amplifier
41
IC Memory
42
Tape Direction Detector
42
Pulse Generation for the Tape Timer
43
Counting Direction Change over Logic
43
Tape Timer Signal Regeneration
43
IC Decoder and Drivers
44
Tape Movement Simulation
45
Spooling Motor Control
47
Brake Control Amplifier
49
Contactors
50
Warning Flasher Circuit
50
Capstan Servo
51
Tape Transport Adjustments
54
Mechanical Adjustments
54
Mechanical Brakes
54
Adjusting the Mechanical Brakes
54
Mechanica Braking Force
56
Capstan Pinch Roller Assembly
57
Tape Tension Sensor
60
Mechanical Adjustment of Tape Tension Sensor
60
D.C. Power Supply Regulator Adjustment
62
Power Transistors and Phase Shift Capacitors
63
Tape Tension Adjustment
64
Tape Tension, PLAY Mode
64
Peak Tape Tension Limiting for Fastwinding Modes
66
Tape Tension and Tension Symmetry, EDIT Mode
67
Brake Control Electronics
68
Capstan Motor Assembly Adjustment
70
Master Bias Erase Oscillator
72
Wiring Lists
73
Groups
73
Elements, Points
77
Wire Marks
77
Location Pin List
78
Capstan Motor Capacitors
79
Signal Wire List
100
Type of Connecting Joints
102
Function Description of Amplifier Electronics
119
Record Preamplifier GR 51 el 2
121
Record Adjustment GR 51 el 12
121
Driver Channel for AF/BIAS
122
Amplifier Channel for Erase Current
122
Reproduce Channel
123
Reproduce Preamplifier
123
Sync. Preamplifier
124
Reproduce Control Circuit
126
VU Meter GR 51 el 8
128
Stabilizer
129
Oscillator
129
Checking and Alignment of Amplifiers
131
Reproduce Alignment to NAB Standard
133
Reproduce Level Adjustment
133
Reproduce Head Azimuth Adjustment
134
Reproduce Frequency Response Equalization
135
Sync Channel Adjustment to NAB Standard
136
Level Adjustment of Sync Channel 15 and 7.5
136
Recording Head Azimuth Adjustment
137
Sync Frequency Response Equalization
138
Record Alignment to NAB Standard
139
Checking Erase Amplifier Adjustment
140
Record Input Level Adjustment
140
Bias Level Adjustment
141
High Frequency Record Equalization
143
Record-Reproduce Frequency Response Check
144
Recorder Adjustment for Operation at Higher Flux Density
145
Reproduce Amplifier Adjustment
146
Record Amplifier Adjustment
146
How to Identify Terminals
147
Channel Supply Transformer
162
Capstan Servo with Variable Speed Control
165

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Studer A80/VU MkI Service Manual (319 pages)

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