Nakamichi dragon cassette deck

Page 2

CONTENTS

1.
2.

3.
4.

5.

10.
11.

General ...................................................................... 2
Mechanical Adjustments .......................................................... 2
2. 1. Mechanism Control Cam Adjustment .......................................... 2
2. 2. Reel Motor Speed Adjustment in Play Mode ..................................... 2
2. 3. Record Head and Playback Head Tilt Adjustment .................................. 2
2. 4. Head Base Stroke Adjustment ............................................... 3
2. 5. Erase Head Stroke Adjustment and Tape Guide Height Check .......................... 4
2. 6. Erase Head Height and Tilt Adjustment ........................................ 4
2. 7. Back Tension Adjustment ................................... ' .............. 5
2. 8. Playback Head and Record Head Height Adjustment and Azimuth Alignment ............... 5
2. 9. Record Head Stroke Adjustment ............................................. 6
2. 10. Tape Travelling Adjustment ................................................ 7
2.1 1. Flywheel Ass y Height Adjustment ........................................... 7
2.12. Lubrication ........................................................... 7
Parts Location for Electrical Adjustment ..... . .......................................... 8
Electrical Adjustments and Measurements ............................................... 9
4. 1. Adjustment and Measurement Instructions ...................................... 9
4. 2. Frequency Response Adjustment ............ . ................................ 12
4. 3. Dolby NR Circuit Check .................................................. 13
Mechanism Ass'y and Parts List ...................................................... 14
5. 1. Synthesis ............................................................ 14
5 2. Cassette Lid Assy (A01) ................................... - ............... 15
5 3. Chassis Assy (A02) ...................................................... 16
5 4. Rear Panel Assy (BOl) ................................................... 16
6 5. Mechanism Assy (302) ................................................... 17
5 6. Flywheel Holder Assy (COl) ............................................... 17
6 7. Sub Mechanism Chassis Assy (CO2) ........................................... 18
5. 8. Main Mechanism Chassis Ass'y (COS) .......................................... 19
5. 9. Head Mount Base Assy (D01) ............................................... 20
5. 10. Supply Pressure Roller Assy (D02) ........................................... 20
5. 11. Take-up Pressure Roller Assy (D03) .......................................... 20
5 12. Head Base Assy (D04) ................................................... 20
5 13. Cassette Case Holder L Assy (D05) ........................................... 20
5 14. Cassette Case Holder R Ass'y (D06) ........................................... 21
5 15. Auto Shut-off Assy (007) ................................................. 21
5 16. Pneumatic Damper Assy (D08) .............................................. 21
5. 17. PA-1L Playback Head Assy (E01) ............................................ 21
5.18 R-8L Record Head Ass y (E02) .............................................. 21
Mou unting Diagrams and Parts List .................................................... 22
6. 1. Power Switch P ..C B. Assy ................................................. 22
6 2. Ease P.C.B. Assy ....................................................... 22
6 3. Shut-off P.C.B. Ass'y ..................................................... 22
6 4. Counter Pulse Generator P.C.B. Assy .......................................... 22
6 5. Direction P.C.B. Assy .................................................... 23
6 6. Timer Switch P.C.B. Assy ................................................. 23
6 7. Tape Select P.C.B. Assy .................................................. 23
6 8. Volume P.C.B. Ass'y ..................................................... 23
6 9. Counter P.C.B. Assy ..................................................... 23
6 10. Indicator P.C.B. Assy .................................................... 24
6. 11. Switch P.C.B. Assy ...................................................... 24
6. 12. Control P.C.B. Assy ..................................................... 25
6 13. Motor Control P.C.B. Ass'y ................................................ 25
6 14. Logic P.C.B. Assy .................. . ................................... 28
6. 15. Auto Azimuth P.C.B. Ass'y ................................................ 29
6.16. Main P. C. B. Ass y ....................................................... 32
Schematic Diagrams ............................................................. 33
7.1. Attention to Servicemen .................................................. 33
7. 2. 10 Block Diagrams ................................... ................... 34
7. 3. Amplifier Section ....................................................... 36
7. 4. Auto Azimuth Control Section .............................................. 37
7. 5. Mechanism Control Section ................................................ 38
Wiring Diagram ................................................................ 39
Timing Chart and Eq. Amp. Frequency Response .......................................... 39
Block Diagrams ................................................................ 40
Specifications ................................................................. 42