Hitachi DA-1000R User Manual

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Hitachi DA-1000R Specifications

General

Disc format	CD
Digital converter	16-bit linear
Frequency response	5 Hz to 20 kHz
Signal to Noise Ratio	100 dB
Channel separation	90 dB
Total harmonic distortion	0.003%
Line output	2V
Channels	2 (stereo)
Dynamic Range	96 dB
Output Voltage	2V

Summary

Safety Precautions

Specifications

Service Points

Before Repairing or Changing Parts

Prerequisites and initial checks before starting service.

Servicing Considerations

Semiconductor Laser Handling

Careful handling of semiconductor lasers during servicing.

Revolving Arm Section Wiring

Attention needed for wirings around the revolving arm.

Player Adjustments

Laser Diode Output Adjustment

Procedure to adjust the laser diode output level.

Tracking Servo Offset Adjustment

Steps for setting the tracking servo offset.

Focus Servo Gain Adjustment

Method for adjusting the focus servo gain.

Turntable Motor Hall Gain and Offset Adjustment

Procedure for adjusting turntable motor hall gain and offset.

New Parts Explanation

Data Strobe LSI Function

Details on the data strobe LSI's functions and signals.

Preamplifier (HA12049A) Explanation

Access Microcomputer (HD44801A95) Explanation

System Microcomputer (HD44820A75) Explanation

Gain Control Microcomputer (HD44700A17) Explanation

Glossary

Mechanism Servicing Precautions

General Precautions for Mechanism Servicing

Important general guidelines for servicing the mechanism.

Parts Not to Disassemble

Critical parts that should not be disassembled.

Unit Mechanism Explanation

Removing and Reinstalling Door Assembly

Procedures for removing and reinstalling the door assembly.

Motor Replacement Procedures

Steps for replacing pickup drive and turntable motors.

Micro Switch and Pickup Assembly Installation

Installation procedures for micro switches and pickup assembly.

Exploded View: Unit Mechanism

Replacement Parts List: Unit Mechanism

Flat Packaged IC Replacement Procedures

Troubleshooting Guide

General Replacement Parts List

Integrated Circuits and Transistors

System Block Diagrams

Pre-Amplifier Section Diagram

Block diagram of the pre-amplifier section.

Pic-up Section Diagram

Block diagram illustrating the pic-up section.

Servo Circuit Section Diagram

Block diagram of the servo circuit section.

Wiring Diagram

Printed Wiring Board Layouts

Pickup P.W.B. Layout

Component layout for the pickup printed wiring board.

PP P.W.B. Layout

Component layout for the PP printed wiring board.

PC P.W.B. Layout

Component layout for the PC printed wiring board.

PS P.W.B. Layout

Component layout for the PS printed wiring board.

Circuit Diagram: PP P.W.B.

Circuit Diagram: Servo (PS P.W.B.)

Circuit Diagram: Audio (PA P.W.B.)

Circuit Diagram: Digital (PD P.W.B.)

Signal Waveforms

Wire Layout Diagram