Nakamichi OMS-7 Service Manual

Service Manual
Nakamichi
Nakamichi

Nakamichi OMS-7 Specifications

General

Brand	Nakamichi
Model	OMS-7
Category	CD Player
Language	English

Summary

1. General

1.1. Voltage Selector

Configures voltage input for the device.

1.2. Packing Materials and Owner's Manual

Lists included packing items and available owner's manuals.

2. Pickup Replacement Procedures

2.1. Notice in Handling Pickup

Safety precautions for handling the laser pickup to prevent static damage.

2.2. Pickup Replacement Procedures

Step-by-step guide for physically replacing the laser pickup assembly.

2.3. Adjustment After Replacement of Pickup

Outlines initial rough adjustments after pickup replacement.

3. Measurement Instruments and Test Discs

4. Parts Location for Adjustment

4.1. Parts on P.C.B. Ass'y

Shows locations of adjustment potentiometers and test points on PCBs.

4.2. Parts on Pickup

Illustrates adjustment screws and lock screws on the pickup assembly.

5. Adjustments

5.1. Notes

Important notes and precautions before performing adjustments.

5.2. Adjustment Instructions

Step-by-step technical procedures for various calibration points.

6. Mechanism Ass'y and Parts List

6.1. Synthesis

Overview of the disc mechanism assembly and its main components.

6.2. Front Panel Ass'y (A01)

Exploded view and parts list for the front panel assembly.

6.3. Chassis Ass'y (A02)

Exploded view and parts list for the chassis assembly.

6.4. Disc Mechanism Ass'y (B01)

Exploded view and parts list for the main disc mechanism assembly.

6.5. Rear Panel Ass'y (B02)

6.6. Disc Mechanism Sub Ass'y (C01)

Exploded view and parts list for a sub-assembly of the disc mechanism.

6.7. Analog Processor Unit (D01)

Exploded view and parts list for the analog processor unit.

7. Mounting Diagrams and Parts List

7.1. Photo Transistor P.C.B. Ass'y

Mounting diagram and component list for the photo transistor circuit board.

7.2. Photo Diode P.C.B. Ass'y

Mounting diagram and component list for the photo diode circuit board.

7.3. Open End Switch P.C.B. Ass'y

Mounting diagram and component list for the open end switch circuit board.

7.9. Pin Jack P.C.B. Ass'y

7.10. FL Indicator P.C.B. Ass'y

Mounting diagram and component list for the FL indicator circuit board.

7.11. Headphone Amp. P.C.B. Ass'y

7.12. Auto Power Control P.C.B. Ass'y

Mounting diagram and component list for the auto power control circuit board.

7.13. RF Pre-Amp. P.C.B. Ass'y

7.14. Power Supply P.C.B. Ass'y

7.15. Control Switch P.C.B. Ass'y

7.16. Analog Processor P.C.B. Ass'y

Mounting diagram and component list for the analog processor circuit board.

7.17. D/A Converter P.C.B. Ass'y

8. Schematic Diagram

8.1. IC Block Diagrams and Descriptions

Visual representations and functional descriptions of key integrated circuits.

8.2. Waveforms at Major Points

Visualizations of signal patterns at critical test points for diagnostics.

9. Wiring Diagram

10. Block Diagram

11. Remote Control Transmitter Unit RM-7

11.1. Mechanism Ass'y and Parts List

Exploded view and parts list for the remote control transmitter's mechanism.

11.2. Mounting Diagram and Parts List

PCB layout and component list for the remote control's circuit board.

11.3. Schematic Diagram

Electrical schematic for the remote control transmitter circuit.

12. Specifications