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Technics SL-HD51

Technics SL-HD51
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3/21/15
Digitized in Heiloo, Holland.
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Technics SL-HD51 Specifications

General IconGeneral
TypeCD Player
Dynamic Range96dB
Channel Separation90dB
Output Level/Voltage2V RMS
Power Requirements230V, 50Hz

Summary

Specifications

Audio

Details on DA converter and pickup specifications.

General

Unit dimensions and weight specifications.

Handling Precautions for Traverse Deck

Handling of traverse deck (optical pickup)

Procedures for handling optical pickup to prevent static damage.

Grounding for electrostatic breakdown prevention

Methods for grounding to prevent electrostatic discharge.

Precaution of Laser Diode

Location of Controls

Listening to Compact Disc

Sequential play

Step-by-step guide for playing CDs in sequence.

One-touch play

Starting playback via remote when system is off.

Operation Checks and Main Component Replacement Procedures

Checking Procedures for each P.C.B.

Procedures for checking main and CD servo P.C.B.s.

Main Component Replacement Procedures

Procedures for replacing traverse deck and loading mechanism parts.

Replacement for the traverse deck assy

Installation of the disc tray after replacement

Installation of the CD servo P.C.B. after replacement

Replacement for the belt, loading motor assy and loading switch

To Supply Power Source

Power Supply to This Unit Alone

Method for powering the unit when operating it alone.

Operate to This Unit Alone

Using specific points as operation switches when unit is operated alone.

To Check Signals

Procedure for checking output signals using oscilloscope or speaker.

Error Code Display and Servo Adjustment Function

Error code display procedure

Steps to display error codes for fault diagnosis.

Servo adjustment procedures

Procedures for adjusting servo systems and displaying results.

Troubleshooting Guide

Type Illustration of ICs, Transistors and Diodes

Wiring Connection Diagram

Schematic Diagram

Servo Circuit

Detailed schematic of the servo amplifier and related components.

Loading Motor Circuit

Schematic of the loading motor drive and control circuit.

Main Circuit

Schematic of the main control and signal processing circuits.

Operation Circuit

Schematic of the operation control and button input circuits.

Power Supply Circuit

Schematic of the power supply and regulation circuits.

Printed Circuit Board Diagram

CD SERVO P.C.B.

Component layout for the CD servo printed circuit board.

LOADING MOTOR P.C.B.

Component layout for the loading motor printed circuit board.

Terminal Function of ICs

IC403 (LC66356 C4 K19): SYSTEM CONTROL

Pinout and function details for the system control IC.

IC701 (AN8837 SBE1): SERVO AMP

Pinout and function details for the servo amplifier IC.

Replacement Parts List

Cabinet Parts Location

Loading Mechanism Parts Location

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