Table Of Contents - TANDBERG 15 Series General And Technical Information

Contents
1.0 Technical Specifications
1.1 Standard Model
1.2 SL Model
1.3
GT Model
2
2
3
3
5.10 Heads and Track Selector
5.10.1 Position DUO
5.10.2 Position NORMAL
5.10.3 Position EXTRA
25
25
26
26
5.11 Function Selector
26
2.0 Operating Controls
4
6.0 Alignment of Tape Path and Electric Circuits 27
3.0 Connections
5 6.1 Tape Guide Posts 27
6.2 Record/Playback Head
27
4.0 Mechanical Description and Adjustment Proce-
6.2.1 Initial Lateral Adjustment 27
dures
6
6.2.2 Height Adjustment 27
4.1 The Operating Lever
6 6.2.3 Azimuth Adjustment
27
4.1.1 Eccentric Segment (990203)
7
6.2.4 Final Lateral Adjustment 27
4.1.2 Pressure Wheel Arm (990202)
7 6.3 Erase Head
28
4.1.3 Operating Arm (248186)
7 6.3.1 Height Adjustment
28
4.2 Turntables
9
6.3.2 Azimuth Adjustment 28
4.2.1 Supply Turntable for Series 14 (990226)
9 6.3.3 Lateral Adjustment
28
4.2.2 Supply Turntable for Series 15 (990226) 10 6.4 Track Control
28
4.2.3 Tape Tensioner
10 6.4.1 Visual Track Control, 2-Track Model
28
4.2.4 Take-Up Turntable (990227) for Series 14 11 6.4.2 Track Control with Test Tape, 4-Track
4.2.5 Adjustment of Turntables
12 Model
28
4.3 Clutches
13 6.4.3 Height Adjustment of Record/Playback
4.3.1 Neutral
13 Head by Track Measurement on
4.3.2 Normal Forward Drive
14 4-Track Model
28
4.3.3 Fast Forward Winding
14 6.5 Bias Current 28
4.3.4 Fast Reverse Winding
15 6.5.1 Oscillator Frequency, 2-Track Model .. 28
4.3.5 Free
16
6.5.2 Oscillator Frequency, 4-Track Model .. 28
4.4 Motor Pulley (254040) for Series 14
16 6.6 Record Current and Record Level Indicator..
28
4.5 Motor Pulley (243940) for Series 15
16 6.7 Verification of Frequency Curves 28
4.6 Drive Belt (213997)
17 6.8 Distortion Check 29
4.7 Transfer Wheel (990233)
17
6.9 Output Amplifier 29
4.8 Lifting Arm (990201) Series 14
17 6.9.1 Output Symmetry
29
4.9 Lifting Arm (990201) Series 15
17 6.9.2 Quiescent Current 29
4.10 Flywheel (990312) with Capstan
18
4.11 Speed Selector, Series 14
19 7.0 Special Versions 29
4.12 Speed Selector, Series 15
19
7.1 Model 15 SL 29
4.13 Instantaneous Start/Stop Mechanism 20 7.1.1 Playback Amplifier 29
4.14 Pressure Pad Spring (Original Version) 20 7.1.2 Mechanical Interlock 29
4.15 Pressure Pad Spring (Modified Version) 20 7.2 Model 15 GT - Group Trainer 30
4.16 End Stop Mechanism 22 7.2.1 Input Amplifier 30
4.16.1 Neutral
22
7.2.2 Output Amplifier 30
4.16.2 Normal Forward Drive
22 7.2.3 Programme Amplifier
30
4.16.3 End Stop or Tape Break
22
7.2.4 Adjustment of Signal Levels 30
4.16.4 Free
22 7.3 Model 15 F
30
4.16.5 Tape Feeler Tension
22 7.3.1 Mechanical Operation
30
7.3.2 Electrical Operation 31
5.0 Electric Circuits
24
5.1 Line Amplifier
24 8.0 Modifications 30
5.2 Microphone Amplifier
24
8.1 Circuit Modification for Low Noise Tape 32
5.3 Buffer Amplifier
24 8.2 Modification of F-Model from Serial
5.4 Equalizing Amplifier 24 No. 2 510 020 32
5.4.1 Equalizing Network for Recording .... 24 8.2.1 Microswitch for Oscillator Voltage
32
5.4.2 Equalizing Network in Playback Mode.. 25 8.2.2 New Microswitch 33
5.5 Playback Booster
25 8.2.3 Rewiring 33
5.6 Indicator Amplifier 25 8.3 Modification from 2-Track to Full-Track Model 33
5.7 Oscillator
25 8.4 Modifications 50 to 60 Hz or Vice Versa .... 33
5.8 Output Amplifier 25
5.9 Power Supply and Voltage Regulator 25
9.0 Parts Lists
34
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