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a710
Studer a710 User Manual
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8
10
Table of Contents
Contents
2
General
7
Controls for Playback Mode
7
Controls for Recording Mode
8
Connectors
8
Front Panel
8
Rear Panel
8
Connector Pin Assignment
9
Care and Maintenance of Recorder
9
Tape Transport Adjustments
9
Audio Adjustments
10
Disassembly
11
Removing the Top Cover
11
Removing the Bottom Cover
11
Removing the Side Cover
11
Removing the Top Crossie
12
Removing the Keyboard and Display Pcbs
12
Removing the Toggle Switches
13
Removal of PEAK READING METER PCB
13
Removing the Rear Cover
13
Removing the Connector Panel Cover
13
Unfastening the Spooling Motor Cover
14
Tools and Aids
15
Preliminary Steps and Checks
15
Checking the Pinch Roller
15
Checking the Pinch Roller Arms
16
Checking the Position of the Centering Pin
16
Checking the Dash Pot
16
Adjusting the Pivoting Carrier
17
Preparatory Steps
18
Adjusting the Soundheads
18
Adjusting the Erase Head
19
Adjusting the Pinch Rollers
19
Adjusting the Pinch Solenoid and the Dash Pot
20
Capstan Motors
21
Adjustments to the Tape Transport Electronics
21
Measuring Instruments and Aids
21
Adjusting the Light Barrier
21
Tuning the Quartz Frequency
22
Adjusting the Move Sensor
23
Checking the Tape Motion
23
Checking the Tape Tension
24
Adjustment of Magnetic Tape Heads and Pressure Rollers
26
Preparations
26
Adjustment of Pressure Rollers
27
Circuit Description of Main Assemblies
29
Power Supply
29
Microprocessor Control
29
Capstan Motor Control
30
Back Tension
30
Tape Drive Chassis
30
Interconnection
30
Oscillator
31
Dolby-C Encoder
32
Input/Output PCB
32
Peak Meter Electronics
33
Stereo Balancing Unit
33
RC Interface
33
Checks
34
Checking the Supply Voltage
34
Checking and Adjusting the Signal Path Without Tape
35
Checking and Calibrating the PEAK READING METER
35
Checking and Adjusting the MPX Filters
36
Checking the Signal-To-Noise Ratio
36
Checking the Calibrating Button
36
Measurements and Adjustments with Tape
37
Adjusting the Reproduce Level
37
Adjusting the Azimuth of the Reproduce Head
37
Checking the Tape Selector Switch
38
Checking the Reproduce Frequency Response
38
Checking the Oscillator Frequency
38
Adjusting the Azimuth of the Record Head
39
Adjusting the Tape Bias
39
Adjusting the Record Level and Equalization
40
Measuring Various Characteristics
40
Distortion
40
Signal-To-Noise Ratio with Tape
41
Erase Depth and Interchannel Cross Talk
41
Wow and Flutter
41
Boards Location
43
Tape Drive/Block Diagram
46
Back Tension PCB
49
Program Preset Switches
50
Toggle Switches PCB
51
Remote Control Interface PCB
52
Remote Control PCB
53
Remote Control/External Wiring
54
Counter Display PCB
55
Keyboard
57
Capstan Motor Control Block Diagram
58
Capstan Motor Driver PCB
61
Audio Block Diagram
66
Wiring of Cassette Cooling Switches
67
Service Wiring List
96
Operating Section
100
Cassette Tape Transport
102
Technical Specifications
108
4
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Studer a710 Specifications
General
Tape Speed
4.76 cm/s
Track System
4-track, 2-channel stereo
Signal-to-Noise Ratio
72dB (dolby C)
Inputs
Line
Outputs
Line, Headphones
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