Sony MDS-JA333ES Service Manual

SERVICE MANUAL
MINIDISC DECK
— Continued on next page —
SPECIFICATIONS
US Model
Canadian Model
AEP Model
UK Model
Model Name Using Similar Mechanism MDS-JA555ES
MD Mechanism Type MDM-6J
Base Unit Type MBU-5J
Optical Pick-up Type KMS-260B/J1N
MDS-JA333ES
U.S. and foreign patents licensed from Dolby Laboratories
Licensing Corporation.
Photo : GOLD
System MiniDisc digital audio system
Disc MiniDisc
Laser Semiconductor laser ( λ = 780 nm)
Emission duration: continuous
Laser output MAX 44.6 µW
1
)
1) This output is the value
measured at a distance of
200 mm from the objective lens
surface on the Optical Pick-up
Block with 7 mm aperture.
Laser diode Material: GaAlAs
Revolutions (CLV) 400 rpm to 900 rpm
Error correction ACIRC (Advanced Cross Interleave
Reed Solomon Code)
Sampling frequency 44.1 kHz
Coding ATRAC (Adaptive TRansform
Acoustic Coding)/ATRAC 3
Modulation system EFM (Eight-to-Fourteen
Modulation)
Number of channels 2 stereo channels
Frequency response 5 to 20,000 Hz ±0.3 dB
Signal-to-noise ratio Over 100 dB during play
Wow and flutter Below measurable limit
Inputs
ANALOG IN Jack type: phono
Impedance: 47 k Ω
Rated input: 500 mVrms
Minimum input: 125 mVrms
DIGITAL IN OPT1 Connector type: square optical
Impedance: 660 nm (optical wave
length)
DIGITAL IN OPT2 Connector type: square optical
Impedance: 660 nm (optical wave
length)
DIGITAL IN COAXIAL Jack type: phono
Impedance: 75 Ω
Rated input: 0.5 Vp-p, ±20 %
Outputs
PHONES Jack type: stereo phone
Rated output: 28 mW
Load impedance: 32 Ω
ANALOG OUT Jack type: phono
Rated output: 2.5 Vrms (at 50
k Ω)
Load impedance: over 10 k Ω

Sony MDS-JA333ES Specifications

General

Type	MiniDisc Player
Sampling Frequency	44.1 kHz
Total Harmonic Distortion	0.0025%
Dynamic Range	100 dB
Headphone Output	Yes
Remote Control	Yes
Power Consumption	22W
Recording Format	ATRAC
Inputs	Optical, Coaxial, Analog
Outputs	Analog, Optical
Output Level	2V
Dimensions (W x H x D)	430 x 110 mm
Frequency Response	5 Hz - 20 kHz (±0.3 dB)
Wow and Flutter	Below measurable level

Summary

Specifications

Safety Check-Out Procedures

AC Leakage Testing Methods

Procedures for checking AC leakage from metal parts.

General Safety Warnings

Warnings regarding battery replacement and handling.

Servicing Notes

Forced Reset Procedure

Method to reset the microprocessor when the unit is unresponsive.

Disassembly Procedures

Self-Diagnosis Function

Error Codes and Remedies

Table detailing error codes and corresponding troubleshooting steps.

IOP Data Recording and Display

Record IOP Data

Steps to input and save the optical pick-up's IOP value.

Diagnostic Checks Before Repair

Laser Power Check

Procedure and criteria for checking laser diode power output.

Front Panel Overview

Front Panel Button Functions

Explanation of the purpose and operation of front panel buttons.

Remote Control Functions

Power and Basic Operation Buttons

Clock Setting Procedures

Setting the Internal Clock

Test Mode Introduction

Entering and Exiting Test Mode

Instructions for accessing and safely exiting the test mode.

Selecting Test Modes

Continuous Playback Mode Operation

Continuous Recording Mode Operation

Electrical Adjustments Overview

Part Replacement and Adjustment Flow

Flowchart for adjustments based on replaced parts.

Optical Pick-up Precautions

Laser Power Check

Traverse Check Procedure

Focus Bias Check Procedure

IOP Information Recording and Display

Recording IOP Information

Laser Power Adjustment

Focus Bias Adjustment Procedure

Error Rate Check Procedures

CD Error Rate Check

Adjusting Points and Connecting Points

Block Diagrams - Main Section

Power Section Schematic Diagram

Power Section Printed Wiring

Waveform Analysis

BD Section Waveforms

Section 8 Electrical Parts List