Nakamichi Cassette Deck 1 Service Manual

Page 1

Service Manual

Nokomichi
Cassette Deckl

Page 2

CONT E N'lS

1.
2.

3.
4.

895"

10.
11.

12.

13.

1.1.

General ...................................................................... 1
Removal Procedures ............................................................. 3
2. 1. Top Cover Assy ........................................................ 3
2. 2. Cassette Case Cover Assy ................................................. 3
2. 3. Sealing Panel Assy ...................................................... 3
2. 4. Front Panel ........................................................... 3
2. 5. Mechanism Ass'y ....................................................... 3
2, 6. Main P.C.B. Assy ...................................................... 4
2. 7. Power Switch Joint and Power Supply 8: Logic P.C.B. Assy ........................... 4
2. 8. Control Switch 8; Display P.C.B. Assy ........................................ 4
2. 9. Head Mount Base Assy .................................................. 5
Tea Tapes and Gauges ............................................................ 5
Mechanical Adjustments .......................................................... 6
4. 1. Record Head and Playback Head Iilt Adjustment .................................. 6
4. 2. Head Base Stroke Check .................................................. 6
4. 3. Erase Head Stroke Adjustment and Tape Guide Height Check .......................... 6
4. 4. Erase Head Height and Tilt Adjustment ........................................ 7
4. 5. Playback Head and Record Head Height Adjustment and Azimuth Alignment ............... 7
4. 6. Tape Travelling Check .................................................... 8
4. 7, Eject Damper Adjustment ................................................. 8
4. 8. Reel Motor Speed Adjustment in Play Mode ..................................... 8
4, 9, Tape Speed Adjustment ................................................... 8
4. 10. Lubrication ........................................................... 8
Parts Location for Electrical Adiustment ................................................ 9
Electrical Adjustments . : .......................................................... 10
Mechanism Au'y and Part: List ...................................................... 14
7. 1. Synthesis ............................................................ 14
7. 2. Chassis Assy (A01) ...................................................... 15
7. 3. Front Escutcheon Assy (801) .............................................. 16
7. 4. Mechanism Assy (302) ................................................... 18
Mounting Diagrams and Puts List .................................................... 19
8. 1. Main P.C.B. Assy ....................................................... 19
8. 2. Power Supply 8: Logic P.C.B. Ass'y ........................................... 21
8, 3. Shut~off P.C.B. Assy ..................................................... 22
8. 4. Timer Switch P.C.B. Ass'y ................................................. 22
8. 5. Headphone P.C.B. Assy ................................................... 22
8. 6. Pin Jack P.C.B. Ass'y ..................................................... 22
8. 7. Playback Amp. P.C.B. Assy ................................................ 22
8, 8, Control Switch & Display P.C.B. Assy ......................................... 23
Schematic Diagram .............................................................. 24
9. 1. IC Block Diagrams ...................................................... 24
9. 2. Schematic Diagram ...................................................... 27
Wiring Ding-am ................................................................ 29
Block Diagram: ..............
11. 1. Amplifier Section ....................................................... 30
l 1. 2. Mechanism Control Section ................................................ 31
Timing Charts and Eq. Amp. Frequency Response ......................................... 32
12. 1. Timing Charts ......................................................... 32
12. 2. Eq. Amp. Frequency Response .............................................. 33
Specifications ................................................................. 34
GENERAL

Production No.
Production No.: A133

1.2. Destinations
USA. CAN, EP, UK, AUS, O'lR, SAU, JPN

Abbreviation
USA ~* U.8.A. AUS - Australia
CAN - Canada OTR - Other
El -- Europe SAU -* Saudi Arabia

UK -- United Kingdom JPN - Japan