Nakamichi MB1S 2S 3S cd sm

Page 2

CONTENTS

1. General ............... .....

2. Removal Procedures .
2.1. Mechanism Ass'y
2.2. Mechanism Top Cover ..
2.3. Drawing the Tray Ass'y ..
2.4. Laser Pickup
2.5. Tray Ass'y .
2.6. Drive Unit Se Ion
2.7. Side Chassis Ft Sectlon.
2 8. Side Chassis L.
2 9. Stacker Ass'y and Main Chassis Section.

3. Mechanical Adiustments ...................................

3.1. Gear Positioning In the Side Chassis Ft SectIon..

32. Positioning the Tray Ass'y
3.3. Lubrication ............................
4. Measurement instruments and Jigs .
5. Parts Location tor Electrical Adlustment
6. Electrical Adjustments .................. . ..........
7. Mechanism Ass'y and Parts List
7.1. Synthesis... .
7.2. Front Escutcheon Section( (A01)
73. Mechanism Ass'y (A02)
7 4. Side Chassis Fi Section (301)
7. 5. Main Chassis Section (802)
7.6. Drive Unit Section (303) ......
8. Mounting Diagrams and Parts List...
5.1. Main P.C.B. Ass'y ......
8.2. Transformer PCB. Assy .
8.3. Power Switch P.C.B. Assy
8.4. Key P C. B. Ass'y..
8.5. Display P. C. B. Ass)!
8 6. Headphone P. C. B. Assy (MB-1s and- -2s)
8.7. DAC P. C. B. Ass'y (MB 15)
9. IC Block Diagrams.
10. Block Diagrams ..
11. Wiring Diagrams .
12. Schematic Diagram (DAC Circuit [MB-15])
Specifications

(DDDGONQUIUIUJt-hthfl

Schematic Diagram (See attached sheet except for DAC circuit [MB-15].)

1. GENERAL

1.1. Product Code
V328 (MBv1s)
V329 (MB-2s)
vaso (MB-35)

1.2. Destinations
USA, CAN, EP. UK. AUS. OTR, JPN

Abbreviations

USA - U.S.A.

CAN - Canada

EP - Europe

UK - United Kingdom
AUS - Australia

0TB - Other

JPN - Japan

1.3. Cautions/Warnings
(1) Product Saiety Notice

Parts marked with the symbol A in the schematic
diagram have critical characteristics.

Use ONLY replacement pans recommended by the manu-
lacturer. it is recommended that the unit be operated from a
suitable DC supply or batteries during initial check-out pro-
cedures.

(2) Leakage Current CheckIResistance Check

Belore returning the unit to the customer. make sure you
make either (1) a ieakage current check or (2) a line to
chassis resistance check. it the leakage current exceeds
0.5 milliamp, or ii the resistance from chassis to either side
of the powercord is less than 240 k ohms, the unit is delec-
tive.

WARNING - DO NOT return the unit to the customer until
the problem is located and corrected.