Tandberg 3000 Service Manual

Page 1

TAM DEERG
mu nun:

For Service Manuals Contact
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Oxon OX9 4QY
Tel:- 01844351694 Fax:- 01864-35654
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b)

Contents

1.0 TECHNICAL SPECIFICATIONS .......... 2
2.0 MECHANCIAL ADJUSTMENTS ............ 4
2.1 Clutches ................. 4
2.1.1 Take~up Turntable. 4

2.1.2 Take-up Tarntable 4

2.1.3 Supply Turntable ..... 4

2.1.4 Supply Turntable .. ........ 4

2.2 Brakes ........................... S
2.3 Pressure Pad Adjustment . . ...... 6
2.4 End Stop Mechanism ..-. ............. 6
2.4.1 Tape Feeler Tension ............ 6

2.4.2 Adjustment of Tape Feeler ...... 6

3.0 ALIGNMENT ........ . . . . ...... 7
3.1 Demagnetlzlng ...... 7
3.2 Blas- and Erase Clrculta ...... 7
3.2.1 Oscillator Frequency . 7

3.2.2 Erase Voltage ......... . . . . 7

3.2.3 Bias Current ................... 7

4.0 TAPE PATH 8
4.1 Vlsual Check ........................ 8

4.2 Mechanlcal adjustment oI tape path . . . B

5.0: HEAD ALIGNMENT WITH TANDBERG TEST

TAPES. MODEL 3041X .................. 9
5.1 Playback head ........... 9
5.1.1 Height Adjustment 9
5.1.2 Azimuth Adjustment . 9
5.2 Record Head ........................ 9

52.1 Height Adjustment by Visual
Inspection ...................... 9

5.2.2 Height Adjustment by Track
Measurement . .................. 9
5.2.3. Azimuth Adjustment . 9
5.3 Blas Head ..................... 9
5.3.1 Vertical Adjustment ...... 9
5.3.2 Height Adjustment ........... 9
5.3.3 Horizontal Adjustment . ...... 9
5.4 Erase Head ...................... 9
5.4.1 Height Adjustment .............. 9
5.4.2 Azimuth Adjustment ............ 10
5.5 Model 3021X ........................ 10

6.0 HEAD ALIGNMENT WITHOUT TANDBERG

TEST TAPES, MODEL 3041X ............. 10
6.1 Playback Head ................. 10
6.1.1 Height Alignment ...... 10
6.1.2 Azimuth Alignment .. ...... 10
6.2 Record Head ................. 10
0.3 BIas Head .. . . .. ...... 10
6.4 Erase Head ..... ' ........... 10
6.4.1 Height Adjustment . 10

6.4.2 Azimuth Adjustment 9.
9.5 Model 3021X

7.0 TRACK CONTROL ....................... 10
7.1 Model 3041X ................... 10
7.1.1 Record Head ....... 10
7.1.2 Erase Head ....... 10
7.1.3 Playback Head ............ 11
7.2 Model] 3021X .................. 11
7.2.1 Erase Head .. ....... 11
7.2.2 Record Head ............. 11
7.2.3 Playback Head ................. 11
0.0 ADJUSTMENT AND CONTROL OF
THE AMPLIFIERS . ...................... 11
8.1.1 Playback Level Adjustment ...... 11
8.1.2 Adjustment of Bias Current ...... 11
8.1.3 Record/Playback Level Adjustment 11
8.1.4. Record/Playback Curves ........ 11
8.1.5 Distortion ............. 11
8.1.6 Control of Playback Amplifier 11
0.2 Tape Speed Control ................. 12

8.2.1 Using Frequency Meter or Counter 12

8.2.2 Using Transformer and Vacuum
Tube Voltmeter ................ 12

8.2.3 Using Tape of Known Length . 12

9.0 RECORD/PLAYBACK CURVES ............ 12
9.1 Readjustment ol Record/Playback Level 12
9.2 Dlstortlon ........................... 12
9.3 Control 01 Playhack and Record
Amplifiers . ..........................
9.3.1 Playback Amplifier ..
9.3.2 Record Amplifier ............... 13
10.0 MODIFICATIONS ........................ 15
10.1 Modillcatlons from 115/130/230/240 V,
50/60 Hz Operatlon .................. 15
10.2 Modlllcatlon from Four-Track to Two-
Track Verslon . ...................... 15
10.3 Component Modltlcatlon In Serles 3000X 15
11. LUBRICATION ........................... 15
12.0 ILLUSTRATIONS WITH REFERENCE
PART NUMBERS . . .' ..................... 16_
13.0 SPARE PARTS LIST FOR MODEL 3000X .. 22
13.1 Mechanical Parts ................... 22
13.2 Electrlcal Components .............. 26

14.0 TABLE OF TRANSISTORS USED IN
MODEL 3000)(

15.0 BLOCK DIAGRAM FOR MODEL 3000K 28
16.0 PRINTED WIRING BOARDS AND WIRING
DIAGRAM '
16.1 Eulopean Verslon .................. 28

16.2 U.S. Verslon ........................ 30