Yamaha MD4S Manuel utilisateur

SERVICE MANUAL

MULTITRACK MD RECORDER

PA 011433

HAMAMATSU, JAPAN

1.93K-288 Printed in Japan '99.01

CONTENTS

DISCS FOR MD4S······································································5

SPECIFICATIONS·······································································6

PANEL LAYOUT ·········································································7

DIMENSIONS··············································································9

BLOCK DIAGRAM·······································································9

CIRCUIT BOARD LAYOUT·······················································10

DISASSEMBLY PROCEDURE·················································11

LSI PIN DESCRIPTION·····························································13

IC BLOCK DIAGRAM································································15

CIRCUIT BOARDS····································································18

ERROR MESSAGES ································································23

INSPECTION SPECIFICATION················································24

MIDI IMPLEMENTATION CHART·············································30

PARTS LIST

OVERALL CIRCUIT DIAGRAM

19981210-79800

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MD4S

WARNING: CHEMICAL CONTENT NOTICE!

The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (where

applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly

other entities) to cause cancer and/or birth defects or other reproductive harm.

DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON

WHAT SO EVER!

Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes

to solder/flux vapor!

If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling

food.

IMPORTANT NOTICE

This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed that

basic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and understood by

the users, and have therefore not been restated.

WARNING: Failure to follow appropriate service and safety procedures when servicing this product may result in personal

injury, destruction of expensive components and failure of the product to perform as specified. For these

reasons, we advise all Yamaha product owners that all service required should be performed by an authorized

Yamaha Retailer or the appointed service representative.

IMPORTANT: This presentation or sale of this manual to any individual or firm does not constitute authorization, certification,

recognition of any applicable technical capabilities, or establish a principal-agent relationship of any form.

The data provided is belived to be accurate and applicable to the unit(s) indicated on the cover. The research engineering, and

service departments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefore, inevitable and

changes in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist,

please contact the distributor's Service Division.

WARNING: Static discharges can destroy expensive components. Discharge any static electricity you body may have

accumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this

buss.)

IMPORTANT: Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the

unit.

WARNING

Components having special characteristics are marked and must be replaced with parts having specification equal to those

originally installed.

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MD4S

TO SERVICE PERSONNEL

Leakage Current Measurement (For 120 V Models

Only).

When service has been completed, it is imperative to

verify that all exposed conductive surfaces are

properly insulated from supply circuits.

• Meter impedance should be equivalent to 1500 ohm

shunted by 0.15µF.

• Leakage current must not exceed 0.5 mA.

• Be sure to test for leakage with the AC plug in both

polarities. • POLARIZATION (U, C models)

This product is equipped with a polarized alternating-

current line plug (a plug having one blade wider than

the other). This plug will fit into the power outlet only

one way. This is a safety feature.

INSULATING

TABLE

EQUIPMENT

UNDER TEST

AC LEAKAGE

TESTER OR

EQUIVALENT

WALL

OUTLET

CAUTION: USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER

THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

THIS PRODUCT SHOULD NOT BE ADJUSTED OR REPAIRED BY ANYONE EXCEPT PROPERLY QUALIFIED SERVICE PERSONNEL.

PROTECTION OF EYES FROM LASER BEAM DURING SERVICING

This set employs a laser. Therefore, be sure to carefully follow the instructions below when servicing.

1. Laser Diode Properties

•Materlal : GaAlAs

•Wavelength : 780 nm

•Emission Duration : Continuous

•Laser Output : max. 44.6µW*

*This output is the value measured at a distance of about 200 mm from the objective lens surface on the

Optical Pick-up Block.

2. When checking the laser diode emission, keep your eyes more than 30 cm away from the objective lens.

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MD4S

English1THIS LABEL SHOWN ON FIGURE INFORMS THE USER THAT THE APPARATUS CONTAINS A LASER COMPONENT.

2THIS LABEL WARNS THAT ANY FURTHER PROCEDURE WILL BRING THE SERVICE PERSONNEL INTO EXPROSURE

WITH THE LASER BEAM.

CAUTION: INVISIBLE LASER RADIATION WHEN OPEN AND INTERLOCKS DEFEATED.

DO NOT STARE INTO BEAM OR VIEW DIRECTLY WITH OPTICAL INSTRUMENTS.

Nordic 1DENNA MÄRKNING (SE FIGUR) UPPLYSER OM ATT DET I APPARATEN INGÅR EN LASERKOMPONENT AV TYP KLASS

2VARNINGSMÄRKNING (SE FIGUR) FÖR STRÅLNING. INGREPP I APPARATEN BÖR ENDAST FÖRETAGAS AV FACKMAN

MED KÅNNEDOM OM LASER. APPARATEN INNEHÅLLER EN LASERKOMPONENT SOM AVGER STRÅLNING

ÖVERSTIGANDE GRÄNSEN FÖR LASERKLASS 1.

1MÆRKAT ER ANBRAGT SOM VIST I ILLUSTRATIONEN FOR AT ADVARE BRUGEREN OM AT APPARATET INDEHOLDER

EN LASERKOMPONENT.

2DETTE MÆRKAT OM LASEREN ER ANBRAGT PÅ APPARATET SOM EN OPLYSNING OM AT APPARATET INDEHOLDER

ET LASERKOMPONENT.

VARNING: OSYNLIG LASERSTRÅLNING NÄR DENNA DEL ÄR ÖPPNAD OCH SPÄRRAR ÄR

URKOPPLADE. STIRRA EJ IN I STRÅLEN OCH BETRAKTA EJ STRÅLEN MED OPTISKA

INSTRUMENT.

VARO!: NÄKYMÄTÖNTÄ AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA

LASERSÄTEILYLLE. ÄLÄ TUIJOTA SÄTEESEEN ÄLÄKÄ KATSO SITÄ OPTISEN LAITTEEN

LÄPI.

ADVARSEL: USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG SIKKERHEDSLÅS BRYTES. STIRR

IKKE INN I STRÅLEN ELLER SE DIREKTE MED OPTISKE INSTRUMENTER.

ADVARSEL: USYNLIG LASERSTRÅLING VED ÅBNING, NÅR SIKKERHEDSAFBRYDERE ER UDE AF

FUNKTION. SE IKKE IND I STRÅLEN-HELLER IKKE MED OPTISKE INSTRUMENTER.

CLASS 1 LASER PRODUCT

CAUTION : INVISIBLE LASER RADIATION WHEN OPEN.

AVOID EXPOSURE TO BEAM.

VARNING : OSYNLIG LASERTRÅLNING NÄR DENNA DEL ÄR

ÖPPNAD. STRÅLEN ÄR FARLIG.

VARO! : NÄKYMÄTÖNTÄ AVATTAESSA OLET ALTTIINA

LASERSÄTEIL YLLE. ÄLÄ KATSO SÄTEESEEN.

VARNING : OSYNLIG LASERSTRÅLNING NÄR DENNA DEL ÄR

ÖPPNAD. BETRAKTA EJ STRÅLEN.

VORSICHT! : UNSICHTBARE LASERSTRAHLUNG WENN ABDECKUNG

GEÖFFNET.NICHT DEM STRAHL AUSSETZEN.

MD Unit

H.B.models

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DISC FOR MD4S

MD4S

It's important that you buy the correct type of disc for use with your MD4S. For 4-track recording and playback, you must use MD DATA discs.

Regular MiniDiscs can only be used for 2-track recording and playback (2 TR mode).

MD DATA discs are used as a storage media for computers. The MD4S uses the MD DATA audio format to store data on them. Regular MiniDiscs

are also referred to as MD discs, although they are used only for music.

New MD DATA discs do not require formatting before use with the MD4S. Discs that have been used to store computer data, however, must first be

formatted.

Regular MiniDisc decks cannot play MD DATA discs.

Regular MiniDiscs recorded on the MD4S can be played on a regular MiniDisc deck.

MiniDisc recordings made on a regular MiniDisc deck can be edited on the MD4S. MiniDiscs containing songs that were digitally copied from a

commercial CD, however, cannot be edited due to the SCMS (Serial Copy Management System) protection system.

Songs that were recorded in 8-track mode on a recorder such as the MD8 cannot be played back on the MD4S.

MD DATA

MiniDisc

Type Logo

MD DATA discs are for computer data storage applications.

You can purchase them at computer stores. This is the type

of disc you should buy for 4-track recording and playback

with your MD4S. Note that there are two types available:

playback only and rewritable. Buy the rewritable type.

MiniDiscs are used only for music. Two types are available:

playback only and recordable. The MD4S can record up to

two tracks on the recordable type and play the playback

only type.

Description

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SPECIFICATIONS

MD4S

Recorder

Mixer

General

Digital/Audio

Rec/Play

Locate

Cue & review

Disc Editing

Song Editing

Track Editing

Title Editing

Panel Controls

MIDI

Display

Sampling Frequency: 44.1 kHz Compression: ATRAC

Frequency Response: 20 Hz–20 kHz, +1 dB, –3 dB

THD+N: Less than 0.02 % (1 kHz)

S/N: 96 dB typ.

4-track independent simultaneous record/play (Recording time: 37 min)

Dubbing with 4-track playback

Auto & Manual Punch In/Out (11.6 ms accuracy)

Four-track (37 min), Stereo (74 min), or Mono (148 min) record/play

Repeat play A-B, Single song, All song

Vari-pitch (+/-10 %)

Start and End point of Song Direct Time Locate

10 Marker locate points for each song Last Recording In/Out point

0.5x, 2x, 4x, 8x, 16x, 32x play speed

Disc Erase

Copy, Move, Divide, Combine, Renumber, Erase

Track Copy, Part Copy, Track Erase, Part Erase

Disc title, Song title

REC SELECT buttons 1–4, BUS button

Transport buttons: PLAY, STOP, PAUSE, REC, REHE, SONG SEARCH, EJECT

Mode buttons: AUTO PUNCH I/O, EDIT, UTILITY, ADJUST, PITCH, PEAK HOLD, DISPLAY, EXIT

CURSOR shuttle/DATA dial

Locate buttons: MARK, MARK SEARCH, LAST REC (IN/OUT), SEARCH, SET, REPEAT, A B

MIDI IN, OUT, THRU jacks

FLD (Fluorescent Display)

Inputs

Outputs

Frequency response

MASTER Channel Features

MIC/LINE IN (CH1, 2) Balanced phone jack x2 (–10 to –50 dB)

MIC/LINE IN (CH1, 2) Balanced XLR x2 (–10 to –50 dB)

MIC/LINE INPUT (CH3–4) Unbalanced phone jack x2 (–10 to –50 dB)

LINE INPUT (CH5–8) Unbalanced phone jack x4 (–10 dB)

INSERT IN/OUT (CH 1, 2) TRS phone jack x2 (–10 dB)

2 TR IN (L, R) Phono x2 (–10 dB)

TRACK DIRECT OUT (1–4) Phono x4(–10 dB)

STEREO OUT (L, R) Phono x2 (–10 dB)

MONITOR OUT (L, R) Phono x2 (–10 dB)

AUX SEND (1, 2) Phone jack x2 (–10 dB)

PHONES OUT Stereo phone jack (8–40 ohm)

20 Hz–20 kHz +1, –3 dB

3-band, +/-15 dB (LOW: 100 Hz shelving, MID: Peaking (2.5 kHz), HIGH: 10 kHz Shelving)

Stereo Fader (45 mm), Monitor Level control, Monitor Select buttons (2 TR IN, STEREO, CUE), CUE MIX TO

STEREO buttons

Power Requirements

Power Consumption

Dimensions (W x H x D)

Weight

Operating Conditions

Supplied Accessories

Optional Accessories

Output Level

USA & Canada: 120 V/60 Hz, Others: 230 V/50 Hz

24 W

413 x 109.5 x 388 mm

5.2 kg

Temperature: 5 ˚C–35 ˚C (41 ˚F–95 ˚F), Humidity: 10 %–95 %

AC power cord, Owner’s Manual

FC5 Footswitch

Refer to the INSPECTION SPECIFICATION Section of this manual.

0 dB is referenced to 0.775 V r.m.s.

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TOC WRITE

REHE REC PLAY STOP

PAUSE

IN OUT

SONG SEARCH

LAST REC SEARCH

MARK SEARCHREPEAT

AUTO

PUNCH I/O

DATA CURSOR

PHONES PUNCH I/O

PITCH

EJECT

ADJUST EDIT UTILITY

CH1

BUS

CH2

REC SELECT

CH3 CH4

LRLR

PEAK HOLD DISPLAY

MULTITRACK MD RECORDER

1234

EXIT

ENTER

SET

MARK

GAIN

CUE

HIGH

LINE

FLIP

MIC/

LINE

MIC

010

–15 +15

MID

–15 +15

LOW

–15 +15

PAN

AUX

GAIN

CUE

HIGH

LINE

FLIP

MIC/

LINE

MIC

010

–15 +15

MID

–15 +15

LOW

–15 +15

PAN

AUX

GAIN

CUE

HIGH

LINE

FLIP

MIC/

LINE

MIC

010

–15 +15

MID

–15 +15

LOW

–15 +15

PAN

AUX

GAIN

CUE

HIGH

LINE

FLIP

MIC/

LINE

MIC

010

–15 +15

MID

–15 +15

LOW

–15 +15

PAN

AUX

5 / 6 7 / 8

010010

STEREO

MONITOR LEVEL

CUE

STEREO

2TR IN

CUE MIX TO STEREO

MONITOR SELECT

MIN MAX

PANEL LAYOUT

MD4S

Control Panel

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MD4S

POWER switch

AC IN

AUX SEND 1, 2 jacks

MONITOR OUT jacks

STEREO OUT jacks

2TR IN jacks

TRACK DIRECT OUT 1-4 jacks

MIDI IN, OUT, THRU connectors

Rear Panel

MIC/ LINE INPUT 1, 2 terminals

INSERT I/O 1, 2 jacks

MIC/ LINE INPUT 3, 4 jacks

LINE INPUT 5-8 jacks

GAIN control

FLIP switch

CUE PAN/ CUE LEVEL controls

EQ (HIG, MID, LOW) controls

AUX control

PAN control

Fader

Level (5/ 6), (7/ 8) controls

CUE MIX TO STEREO switch

MONITOR SELECT (2TR IN, STEREO, CUE)

switches

MONITOR LEVEL control

STEREO fader

Disk transport (REHE, REC, PLAY, PAUSE,

STOP/ TOC WRITE) buttons

AUTO PUNCH I/O button

SONG SEARCH ( , ) buttons

A B repeat button

LAST REC SEARCH (IN, OUT), SET buttons

REPEAT button

MARK SEARCH ( , ), MARK buttons

Disc compartment

BUS button

REC SELECT buttons

EJECT button

PEAK HOLD button

DISPLAY button

Function (PITCH, ADJUST, EDIT, UTILITY)

buttons

EXIT button

ENTER button

DATA dial (DATA + -)

CURSOR shuttle

PHONES jack

PUNCH I/O jack

Control Panel

Top panel connectors

Mono Inputs

Stereo Inputs

Disc transport section

Front Panel

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Title and function display

Time counter mode

MIDI indicators

Track level meters

Stereo level meter

Pitch indicator

Status indicators

TOC EDIT indicator

Repeat indicator

Marker indicators

Time counter

IN, OUT indicators

Auto punch indicator

Track recording indicators

CUE MIX indicator

Display

MD4S

DIMENSIONS

W: 413

H: 109.5

D: 388

Unit : mm

BLOCK DIAGRAM

MEMORY

CONTROL

ATRAC

AUDIO

INTERFACE

IC 101

IC 203

ROM

IC 104

AD / DA

IC 301

IC 302

SRAM

IC 103

M-Com

IC 109

DRAM

IC 102

FL DISPLAY

SUB SHEET

MECHA

UNIT

MAIN Part

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TRACK 1

TRACK 2

TRACK 3

TRACK 4

RECORDER

STEREO METER

MIC/LINE

INSERT I/O

1,2

2TR IN

PAN

CUE PAN

FLIP

LOW HIGH MID

GAIN

MONITOR

SELECT

AUX

2TR IN

STERO

CUE

STEREO

FADER

AUX SEND

STEREO

OUT

MONITOR

OUT

PHONES

4TRACK

DIRECT

OUT

MONITOR

LEVEL

DIRECT

1,2

CUE

1,2

M/L

STEREO CUEAUX

LR LR

CUE 1 ~ 4PB 1 ~ 4DIRECT 1 ~ 4

AD1

AD2

AD3

AD4

DA1

DA2

DA3

DA4

REC

MIC/LINE

3,4

PAN

CUE PAN

FLIP

GAIN

AUX

FADER

DIRECT

3,4

CUE

3,4

M/L

1,2

LINE 6,8

LINE 5,7

INPUT LEVEL

CUE MIX TO STEREO

CUE LEVEL

IC101 IC103,104 IC107

IC109

VR101

VR201 VR102

VR202 VR103

VR203 VR104

VR204

LOW HIGH MID

VR302

VR402

VR301

VR401

SW103

SW104

VR303

VR403 VR304

VR404

VR105

VR205

VR108 VR109,209

SW105

SW106

107

SW108

VR106,206

VR107,207

VR309,409

VR306,406

VR307,407

VR208

VR305

VR405

VR308

VR408

VR501

VR502

1,7 6721 3,51,7

3,5 1,7

IC108IC105,106

3,5127

IC102

1,7 61,7 IC113 VR503

IC114

IC120

IC119

IC118 VR504

IC116

IC117

IC112

IC111

IC112

IC115

IC111

IC110

3,5 1,7

SW101

SW102

KEC-92344

MD4S

Mixer Part

CIRCUIT BOARD LAYOUT

SUB 2/3

SUB 3/3

SUB 1/3

MIX 2/2 (INPUT)

MIX 1/2

MAIN

Power transformer

MD mechanical unit

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