Sharp MD-MS701H User Manual

MD-MS701H/MS702H
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CONTENTS
Page
SAFETY PRECAUTION FOR SERVICE MANUAL ............................................................................................................... 2
SPECIFICATIONS ................................................................................................................................................................. 3
NAMES OF PARTS ............................................................................................................................................................... 4
OPERATION MANUAL .......................................................................................................................................................... 5
DISASSEMBLY...................................................................................................................................................................... 8
REMOVING AND REINSTALLING THE MAIN PARTS ......................................................................................................... 9
ADJUSTMENT ...................................................................................................................................................................... 10
NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. 28
BLOCK DIAGRAM ............................................................................................................................................................... 29
SCHEMATIC DIAGRAM/WIRING SIDE OF P.W.BOARD................................................................................................... 30
WAVEFORMS OF CD CIRCUIT .......................................................................................................................................... 39
TROUBLE SHOOTING ........................................................................................................................................................ 40
FUNCTION TABLE OF IC.................................................................................................................................................... 43
PARTS GUIDE/EXPLODED VIEW
PACKING METHOD (FOR UK ONLY)
• In the interests of user-safety the set should be restored to its original condition
and only parts identical to those specified should be used.
MD-MS701H
MD-MS702H(BL)
MD-MS702H(GY)
SERVICE MANUAL
SHARP CORPORATION
No. SX789MDMS702H
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
Illustration: MD-MS701H

Sharp MD-MS701H Specifications

General

MD Playback	Yes
Headphone Jack	Yes
Audio Formats	ATRAC
Frequency Response	20Hz - 20kHz
Type	Portable MiniDisc Player
Media Type	MiniDisc
Signal-to-Noise Ratio	90dB
Dynamic Range	90dB
Power Supply	AC Adapter

Summary

Safety Precautions

Service Safety Precautions

Precautions for handling the laser pickup and avoiding eye exposure during servicing.

Specifications

Product Specifications

Details on power source, consumption, battery life, dimensions, and audio output.

Parts Identification

Main Unit and Remote Control Parts

Identifies all buttons, indicators, and connectors on the main unit and remote.

Operation Manual

Power Source and System Limitations

Explains power options and operational constraints of the MiniDisc system.

Disassembly Procedures

Disassembly Precautions and Steps

Guidelines and sequential steps for safely disassembling the unit.

Removing Main Parts

Procedures for removing key components like motors and the magnetic head.

Adjustment Procedures

Test Mode Entry and Navigation

How to enter, exit, and navigate through the service test modes.

Adjustment Modes and Operations

Detailed steps for AUTO, MANUAL, RESULT, and playback test modes.

Data Settings and Calibration

Procedures for EEPROM writing, temperature calibration, and parameter lists.

Component-Specific Adjustments

Focus, tracking, sled, and other system parameter adjustments.

Troubleshooting Guide

Common Operational Issues

Problems like no power, no sound, unit unresponsiveness.

Error Messages and Remedies

Lists error messages, their meanings, and recommended remedies.

Troubleshooting Specific Malfunctions

No Operation and Display Issues

Guides for no function, abnormal display.

Playback and Audio Issues

Troubleshooting playback state and audio output.

Motor and Recording Issues

Diagnosing motor failures and recording problems.

Schematic Diagrams and Wiring

Schematic Diagram Overview

Explains schematic symbols, notes, and provides the main block diagram.

Circuit and Wiring Diagrams

Detailed schematic diagrams and PWB wiring layouts for the unit.

Waveforms

MD Circuit Signal Waveforms

Visual representations of key signals within the MD circuit for diagnosis.

Parts Guide

Parts Ordering and Identification

Information on ordering parts, and codes for capacitors and resistors.

Component and Exploded Views

Detailed part lists and visual breakdowns of the mechanism and cabinet.

Packing Method

Unit Packing Instructions

Method for packing the unit and its accessories for shipping.