Yamaha Md4s User manual

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

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

MD4S

2

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.

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

MD4S

3

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.

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

MD4S

4

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

1.

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

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

DISC FOR MD4S

MD4S

5

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

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

SPECIFICATIONS

MD4S

6

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

EQ

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.

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

TOC WRITE

REHE REC PLAY STOP

PAUSE

IN OUT

SONG SEARCH

LAST REC SEARCH

MARK SEARCHREPEAT

AUTO

PUNCH I/O

AB

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

1

GAIN

CUE

HIGH

LINE

FLIP

MIC/

LINE

MIC

LR

010

–15 +15

MID

–15 +15

LOW

–15 +15

PAN

LR

AUX

12

PB

10

9

8

7

6

5

4

3

2

1

0

P

A

N

L

E

V

E

L

2

GAIN

CUE

HIGH

LINE

FLIP

MIC/

LINE

MIC

LR

010

–15 +15

MID

–15 +15

LOW

–15 +15

PAN

LR

AUX

12

PB

10

9

8

7

6

5

4

3

2

1

0

P

A

N

L

E

V

E

L

3

GAIN

CUE

HIGH

LINE

FLIP

MIC/

LINE

MIC

LR

010

–15 +15

MID

–15 +15

LOW

–15 +15

PAN

LR

AUX

12

PB

10

9

8

7

6

5

4

3

2

1

0

P

A

N

L

E

V

E

L

4

GAIN

CUE

HIGH

LINE

FLIP

MIC/

LINE

MIC

LR

010

–15 +15

MID

–15 +15

LOW

–15 +15

PAN

LR

AUX

12

PB

10

9

8

7

6

5

4

3

2

1

0

P

A

N

L

E

V

E

L

5 / 6 7 / 8

010010

STEREO

MONITOR LEVEL

CUE

STEREO

2TR IN

CUE MIX TO STEREO

MONITOR SELECT

10

9

8

7

6

5

4

3

2

1

0

10

9

8

7

6

5

4

3

2

1

0

MIN MAX

PANEL LAYOUT

MD4S

7

Control Panel

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

MD4S

8

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

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

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

9

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

MD

MECHA

UNIT

MAIN Part

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

TRACK 1

TRACK 2

TRACK 3

TRACK 4

RECORDER

STEREO METER

MIC/LINE

INSERT I/O

1,2

2TR IN

L

R

PAN

CUE PAN

FLIP

LOW HIGH MID

GAIN

MONITOR

SELECT

AUX

2TR IN

STERO

CUE

STEREO

FADER

1

2

AUX SEND

R

L

R

L

STEREO

OUT

MONITOR

OUT

PHONES

1

2

3

4TRACK

DIRECT

OUT

MONITOR

LEVEL

DIRECT

1,2

PB

1,2

CUE

1,2

M/L

PB

M/L

PB

STEREO CUEAUX

LR LR

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

1

2

3

4

L

R

L

AD1

AD2

AD3

AD4

DA1

DA2

DA3

DA4

PB

REC

PB

REC

PB

REC

PB

REC

12

MIC/LINE

3,4

PAN

CUE PAN

FLIP

GAIN

AUX

FADER

DIRECT

3,4

PB

3,4

CUE

3,4

M/L

PB

M/L

PB

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

SW

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

67

21

IC114

67

IC120

75

13

21

IC119

67

21

IC118 VR504

67

21

IC116

67

21

IC117

67

21

IC112

67

IC111

67

IC112

21

IC115

67

21

IC111

21

IC110

3,5 1,7

SW101

SW102

KEC-92344

MD4S

10

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

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

MD4S

11

[520A]: Bind Head Tapping Screw-B 3.0 X 8 MFZN2BL (EP600190)

(Fig. 1)

Bottom cover

[520A][

520A]

DISASSEMBLY PROCEDURE

1. Bottom Cover

1-1 Remove the twelve (12) screws marked [520A].

The bottom cover can then be removed. (Fig. 1)

2. MAIN Circuit Board

2-1 Remove the bottom cover. (See Procedure 1.)

2-2 Remove the screw marked [530] and the three

(3) screws marked [520B]. The MAIN circuit

board can then be removed. (Fig. 2)

3. MD Mechanical Unit

3-1 Remove the bottom cover. (See Procedure 1.)

3-2 Remove the four (4) screws marked [520C] and

the screw marked [520D]. The MD mechanical

unit can then be removed. (Fig. 2)

4. SUB 1/3 Circuit Board

4-1 Remove the SHUTTLE knob and JOG knob. (Fig.3)

4-2 Remove the bottom cover. (See Procedure 1.)

4-3 Remove the MD mechanical unit. (See Procedure 3.)

4-4 Remove the two (2) screws marked [520E] and

the four (4) screws marked [500]. The sub chassis

with the SUB 2/3 circuit board and power

transformer can then be removed. (Fig. 2, 3)

4-5 Remove the SUB 1/3 circuit board while pressing

the twelve (12) hooks marked [A]. (Fig. 5)

5. SUB 2/3 Circuit Board

5-1 Remove the bottom cover. (See Procedure 1.)

5-2 Remove the two (2) screws marked [520E], the

six (6) screws marked [520F] and the four (4)

screws marked [520G]. The SUB 2/3 circuit

board can then be removed. (Fig. 2, 3)

5-3 Remove the POWER button from the SUB 2/3

circuit board.

6. SUB 3/3 Circuit Board

6-1 Remove the bottom cover. (See Procedure 1.)

6-2 Remove the two (2) screws marked [520H]. The

SUB 3/3 circuit board can then be removed.

(Fig. 2)

6-3 Remove the two (2) U-shaped holders marked

[410A], then remove the support JACK from the

SUB 3/3 circuit board. (Fig. 6)

[520]: Bind Head Tapping Screw-B 3.0 X 8 MFZN2BL (EP600190)

[490]: Bind Head Screw 4.0 X 8 MFZN2BL (EG340360)

[500]: Bind Head Tapping Screw-P 4.0 X 12 MFZN2BL (VA847600)

[520]: Bind Head Tapping Screw-B 3.0 X 8 MFZN2BL (EP600190)

[530]: Screw 3B-8Y9294 (VR602100)

(Fig. 4)

(Fig. 3)

(Fig. 2)

POWER button

MAIN Holder FADER knobs JOG knob SHUTTLE knob

MD mechanical unit

Power transformer

[520E]

[520F]

[500]

[520B]

[520I]

[520D]

[520C]

[500]

[490][

520G]

[520B][520H]

[520B]:Japanese

Model

[530]

MAIN

SUB3/3

SUB2/3

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

MD4S

12

Top cover

Support JACK

SUB1/3 [A]

[410A]

(Fig. 5) (Fig. 6)

[410A]: U-shaped Holder MET41-0191 (VI549000)

7. MIX 1/2 Circuit Board

7-1 Remove the five (5) FADER knobs. (Fig. 3)

7-2 Remove the bottom cover. (See Procedure 1.)

7-3 Remove the SUB 2/3 circuit board. (See Procedure 5.)

7-4 Remove the MAIN circuit board. (See Procedure 2.)

7-5 Remove the four (4) screws marked [520I] and

the screw marked [520D]. The MAIN holder

can then be removed. (Fig. 2)

7-6 Remove the MD mechanical unit. (See Procedure 3.)

7-7 Remove the eight (8) screws marked [520J].

The MIX 1/2 circuit board can then be removed.

(Fig. 7)

8. MIX 2/2 (INPUT) Circuit Board

8-1 Remove the bottom cover. (See Procedure 1.)

8-2 Remove the two (2) screws marked [520E] and

the four (4) screws marked [500]. The power

transformer with the SUB 2/3 circuit board can

then be removed. (Fig. 2, 3)

8-3 Remove the screw marked [510]. The shield

INPUT can then be removed. (Fig. 7)

8-4 Remove the two (2) screws marked [520K]. The

MIX 2/2 (INPUT) circuit board can then be

removed. (Fig. 7)

8-5 Remove the four (4) screws marked [520L] and

the two (2) U-shaped holders marked [410B].

The support JACK can then be removed from

the MIX 2/2 (INPUT) circuit board. (Fig. 8)

9. Power Transformer

9-1 Remove the bottom cover. (See Procedure 1.)

9-2 Remove the two (2) screws marked [490]. The

power transformer can then be removed. (Fig. 2)

Shield INPUT

MIX2/2 (INPUT)

MIX1/2

[510]

[520K]

[520J]

[520L][

410B]

(Fig. 7)

(Fig. 8)

[510]: Bind Head Screw 3.0 X 6 MFZN2BL (EG330360)

[520]: Bind Head Tapping Screw-B 3.0 X 8 MFZN2BL (EP600190)

[410B]: U-shaped Holder MET41-0191

(VI549000)

[520L]: Bind Head Tapping Screw-B 3.0 X 8 MFZN2BL

(EP600190)

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

MD4S

13

LSI PIN DESCRIPTION

NO.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

I/O

I

O

I

I/O

O

VCC

PB0

PB1

PB2

PB3

PB4

PB5

PB6//DREQ0

PB7//DREQ1

/RES0

VSS

P90/TXD0

P91/TXD1

P92/RXD0

P93/RXD1

P94/SCK0

P95/SCK1

P40/D0

P41/D1

P42/D2

P43/D3

VSS

P44/D4

P45/D5

P46/D6

P47/D7

D8

D9

D10

D11

D12

D13

D14

D15

VCC

A0

A1

A2

A3

A4

A5

A6

A7

VSS

A8

A9

A10

A11

A12

A13

NAME

Power supply (+5 V)

Port B

Port B/DMA request

Reset output

Ground

Port 9/Transmission data

Port 9/Reception data

Port 9/Serial clock

Port 4/Data bus (Ground)

Data bus

Power supply (+5 V)

Address bus (Ground)

FUNCTION PIN

NO.

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

I/O

O

I

O

I

O

I

O

I/O

A14

A15

A16

A17

A18

A19

VSS

P60//WAIT

P61//BREQ

P62//BACK

Ø

/STBY

/RES

NMI

VSS

EXTAL

XTAL

VCC

/AS

/RD

/HWR

/LWR

MD0

MD1

MD2

AVCC

VREF

P70/AN0

P71/AN1

P72/AN2

P73/AN3

P74/AN4

P75/AN5

P76/AN6

P77/AN7

AVSS

P80//RFRSH

P81//CS3

P82//CS2

P83//CS1

P84//CS0

VSS

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

NAME

Address bus

Ground

Port 6 /Wait

Port 6/Bus request

Port 6/Bus acknowledge

System clock

Stand-by mode signal

Reset

Non-maskable interrupt

Ground

Crystal oscillator

Power supply (+5 V)

Address strobe

Read strobe

High write

Low write

Mode select (mode 1 – 4)

Power supply for ADC

Reference voltage for ADC

Port 7/Analog input

Ground for ADC

Port 8/Refresh

Port 8/Chip select

Ground

Port A

FUNCTION

HD6413002F16 (XP691A00) CPU MAIN IC109 PIN

NO.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

I/O

I

O

I

O

I

O

I

O

I

O

I

O

I

VDD1

ACDI0

XABS0

C2PO0

XARQ0

ACDO0

SYNC0

ACDI1

XABS1

C2PO1

XARQ1

ACDO1

SYNC1

F86IA

F86OA

F86IB

F86OB

ACDI2

XABS2

C2PO2

XARQ2

ACDO2

SYNC2

ACDI3

XABS3

C2PO3

XARQ3

ACDO3

SYNC3

VSS1

TEST0

TEST1

TEST2

EXEC0

EXEC1

EXEC2

EXEC3

ATT0

ATT1

ATT2

ATT3

MUTE0

MUTE1

MUTE2

MUTE3

REC0

REC1

REC2

REC3

XLAT0

XLAT1

XLAT2

XLAT3

XRSTA

XRSTB

SCLK

SWDT

TA0

TA1

VSS2

NAME

Power supply

ATRAC data input 0

ATRAC data serial transfer synchronization pulse input 0

ATRAC data error flag 0

ATRAC data transfer demand 0

ATRAC data output 0

Signal input 0 for ATRAC data synchronized

ATRAC data input 1

ATRAC data serial transfer synchronization pulse input 1

ATRAC data error flag 1

ATRAC data forward demand 1

ATRAC data output 1

Signal input 1 for ATRAC data synchronized

Frame synchronized signal input A

Frame synchronized signal output A

Frame synchronized signal input B

Frame synchronized signal output B

ATRAC data input 2

ATRAC data serial transfer synchronization pulse input 2

ATRAC data error flag 2

ATRAC data f transfer demand 2

ATRAC data output 2

Signal input 2 for ATRAC data synchronized

ATRAC data input 3

ATRAC data serial forward synchronization pulse input 3

ATRAC data error flag 3

ATRAC data transfer demand 3

ATRAC data output 3

Signal input 3 for ATRAC data synchronized

Ground

Test terminal

Start / Stop establishment input 0 (“H”=START)

Start / Stop establishment input 1 (“H”=START)

Start / Stop establishment input 2 (“H”=START)

Start / Stop establishment input 3 (“H”=START)

Attenuation establishment input 0 (“H”=-12dB)

Attenuation establishment input 1 (“H”=-12dB)

Attenuation establishment input 2 (“H”=-12dB)

Attenuation establishment input 3 (“H”=-12dB)

Mute establishment input 0 (“H”=mute on)

Mute establishment input 1 (“H”=mute on)

Mute establishment input 2 (“H”=mute on)

Mute establishment input 3 (“H”=mute on)

REC/PLAY establishment input 0 (“H”=REC)

REC/PLAY establishment input 1 (“H”=REC)

REC/PLAY establishment input 2 (“H”=REC)

REC/PLAY establishment input 3 (“H”=REC)

Latch pulse input 0 of serial interface

Latch pulse input 1 of serial interface

Latch pulse input 2 of serial interface

Latch pulse input 3 of serial interface

Reset input A

Reset input B

Transfer clock input of serial interface

Data input of serial interface

Test terminal (Connect it with the ground.)

Ground

FUNCTION

CXD2538R (XU964A00) ATRAC MAIN IC203PIN

NO.

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

I/O

I

O

I

O

I

O

I

O

I

VDD2

XILT

IDSL

SICK

DIDT

ACLK

BCK

LRCK

ADIN0

DOUT0

ADIN1

DOUT1

ADIN2

DOUT2

ADIN3

DOUT3

TA2

TA3

TA4

TA5

TA6

TA7

TA8

TA9

TA10

TA11

TA12

TD0

TD1

VSS

OSCI

OSCO

SP0

TD2

TD3

TD4

TD5

TD6

TD7

TD8

TD9

TD10

TD11

TD12

TA13

TA14

TA15

TA16

TA17

TA18

TA19

TA20

TA21

TA22

TA23

TS0

TS1

TS2

TS3

VSS4

NAME

Power supply

Test terminal (Connect it with the power supply.)

Serial transfer clock (128 Fs) input of ATRAC data

2.8224 MHz (64 Fs)

44.1 kHz (Fs)

REC audio data input 0

Replay audio data output 0

REC audio data input 1

Replay audio data output 1

REC audio data input 2

Replay audio data output 2

REC audio data input 3

Replay audio data output 3

Test terminal (Connect it with the ground.)

Ground

Crystal oscillator input (1024 Fs)

Crystal oscillator output (1024 Fs)

1/2 oscillator output (512 Fs)

Test terminal (Connect it with the ground.)

Ground

FUNCTION

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

MD4S

14

NO.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

I/O

O

I/O

I

O

I

O

I

O

I+/O

O

I

O

I

O

I+/O

I

O

I+/O

I

VSS

LWRT

DDATA

DC2PO

ADSY

REC

(VSS)

MTYP

A0

A1

A2

VDD

A3

A4

A5

A6

A7

A8

A9

A10

A11

VSS

VDD

DBCK

DLRCK

MCKI

MCKO

DMCKO

XRAS

XUCAS

XLCAS

XWE

XOE

(VSS)

D0

D1

D2

D3

D4

D5

VSS

D6

D7

D8

D9

D10

D11

D12

D13

D14

D15

VDD

GND

XCSRA

SFCLK

XSAS

XSWRH

XSWRL

XSRD

XINT

XLAT

XRST

XTCL

VCC

XBUSY

SD15

SD14

SD13

SD12

SD11

SD10

SD9

SD8

SD7

SD6

SD5

SD4

GND

VCC

MIDCKI

MIDCKO

SD3

SD2

SD1

SD0

SA13

SA12

SA11

SA10

SA9

SA8

SA7

GND

SA6

SA5

SA4

SA3

SA2

SA1

SA0

SA16

SA17

SA18

VCC

NAME

Ground

Laser power control

REC/PLAY data

C2 Error flag input

ADIP sync input

REC/PLAY select signal

Ground

DRAM type select

DRAM Address A0

DRAM Address A1

DRAM Address A2

Power supply

DRAM Address A3

DRAM Address A4

DRAM Address A5

DRAM Address A6

DRAM Address A7

DRAM Address A8

DRAM Address A9

DRAM Address A10

DRAM Address A11

Ground

Power supply

DDATA I/O Bit clock

LRCK for DIF

Clock input for DIF

Clock output for DIF

Master clock output

DRAM RAS signal

DRAM CAS signal (HIGH_BYTE)

DRAM CAS signal (LOW BYTE)

DRAM write signal

DRAM read signal

Ground

DRAM data Bit 0

DRAM data Bit 1

DRAM data Bit 2

DRAM data Bit 3

DRAM data Bit 4

DRAM data Bit 5

Ground

DRAM data Bit 6

DRAM data Bit 7

DRAM data Bit 8

DRAM data Bit 9

DRAM data Bit 10

DRAM data Bit 11

DRAM data Bit 12

DRAM data Bit 13

DRAM data Bit 14

DRAM data Bit 15

Power supply

Ground

Chip select signal (for SRAM)

Sound frame synchronized clock

CPU address strove signal

CPU write signal (HIGH BYTE)

CPU write signal (LOW BYTE)

CPU read signal

Interrupt flag output

ATRAC command data latch pulse signal signal

Reset signal

Reset signal for test

Power supply

CPU wait signal output

CPU data Bit 15

CPU data Bit 14

CPU data Bit 13

CPU data Bit 12

CPU data Bit 11

CPU data Bit 10

CPU data Bit 9

CPU data Bit 8

CPU data Bit 7

CPU data Bit 6

CPU data Bit 5

CPU data Bit 4

Ground

Power supply

Clock input for MIDI

Clock output for MIDI

CPU data Bit 3

CPU data Bit 2

CPU data Bit 1

CPU data Bit 0

CPU address A13

CPU address A12

CPU address A11

CPU address A10

CPU address A9

CPU address A8

CPU address A7

Ground

CPU address A6

CPU address A5

CPU address A4

CPU address A3

CPU address A2

CPU address A1

CPU address A0

CPU address A16

CPU address A17

CPU address A18

Power supply

FUNCTION PIN

NO.

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

I/O

I

I/O

O

I

I/O

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I/O

VSS

SA19

EXTIOAO

EXTIOA1

EXTIOA2

EXTIOA3

(VDD)

EXTIOA4

EXTIOA5

EXTIOA6

EXTIOA7

VSS

XCS1

XCS2

XCS3

MTCIN

EXTIOB0

EXTIOB1

EXTIOB2

EXTIOB3

(VSS)

EXTIOB4

EXTIOB5

EXTIOB6

EXTIOB7

VDD

VSS

ACLK

XLATPB

XABSPB

ADTOB

AC2B

XARQPB

DECB

XLATPA

XABSPA

ADTOA

AC2A

XARQPA

DECA

VDD

XLATRB

XABSRB

ADTIB

XARQRB

ENCB

XLATRA

XABSRA

ADTIA

XARQRA

ENCA

VDD

GND

A1024FS

A256FS

XABCK

ABCK

ALRCK

(GND)

DAB

ADB

DAA

ADA

VCC

MTCOUT

TOSEL 4

TOSEL 3

TOSEL 2

TOSEL 1

TOSEL 0

TEST 7

TEST 6

TEST 5

TEST 4

TEST 3

VRCKI

VRCKO

GND

VCC

VCOI

VCOO

TEST 2

TEST 1

TEST 0

PDOUTN

PDOUTP

EXTIOCO

EXTIOC1

EXTIOC2

EXTIOC3

EXTIOC4

EXTIOC5

GND

EXTIOC6

EXTIOC7

EXTIOD0

EXTIOD1

EXTIOD2

EXTIOD3

EXTIOD4

EXTIOD5

EXTIOD6

EXTIOD7

VCC

NAME

Ground

CPU address A19

Extension port A of bit 0

Extension port A of bit 1

Extension port A of bit 2

Extension port A of bit 3

Power supply

Extension port A of bit 4

Extension port A of bit 5

Extension port A of bit 6

Extension port A of bit 7

Ground

Spare 1 of chip select

Spare 2 of chip select

Spare 3 of chip select

MIDI time code input

Extension port B of bit 0

Extension port B of bit 1

Extension port B of bit 2

Extension port B of bit 3

Ground

Extension port B of bit 4

Extension port B of bit 5

Extension port B of bit 6

Extension port B of bit 7

Power supply

Ground

Clock for ATRAC data transfer transmission

Command data latch pulse for ATRAC (PB)

Busy flag for ATRAC (PB)

ATRAC decode data output (PB)

C2 error flag for ATRAC (PB)

Data demand signal from ATRAC (PB)

ATRAC decode data input (PB)

Command data latch pulse for ATRAC (PA)

Busy flag for ATRAC (PA)

ATRAC decode data output (PA)

C2 error flag for ATRAC (PA)

Data demand signal from ATRAC (PA)

ATRAC decode data input (PA)

Power supply

Command data latch pulse for ATRAC (RB)

Busy flag for ATRAC (RB)

ATRAC encode data input (RB)

Data demand signal from ATRAC (RB)

Signal output for ATRAC encode(RB)

Command data latch pulse for ATRAC (RA)

Busy flag for ATRAC (RA)

ATRAC encode data input (RA)

Data demand signal from ATRAC (RA)

Signal output for ATRAC encode(RA)

Power supply

Ground

Quartz Crystal output (1024Fs)

Quartz Crystal output (256Fs)

Quartz Crystal output (64Fs)

Quartz Crystal output (64Fs reverse)

Sampling frequency output for audio

Ground

DA signal output (CH3,4)

AD signal input (CH3,4)

DA signal output (CH1,2)

AD signal input (CH1,2)

Power supply

MIDI time code output (reverse)

Test mode select input 4

Test mode select input 3

Test mode select input 2

Test mode select input 1

Test mode select input 0

Test signal output 7

Test signal output 6

Test signal output 5

Test signal output 4

Test signal output 3

Counter clock input

Counter clock output

Ground

Power supply

Clock input for PLL

Clock output for PLL

Test signal output 2

Test signal output 1

Test signal output 0

Phase comparison output

Expansion port C of bit 0

Expansion port C of bit 1

Expansion port C of bit 2

Expansion port C of bit 3

Expansion port C of bit 4

Expansion port C of bit 5

Ground

Expansion port C of bit 6

Expansion port C of bit 7

Expansion port D of bit 0

Expansion port D of bit 1

Expansion port D of bit 2

Expansion port D of bit 3

Expansion port D of bit 4

Expansion port D of bit 5

Expansion port D of bit 6

Expansion port D of bit 7

Power supply

FUNCTION

MD4MC2 (XU849A00) GATE ARRAY MAIN IC101

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

MD4S

15

NO.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

I/O

I

-

I

O

VREFH

VREFL

AINR+

AINR-

AINL+

AINL-

VA

AGND

DIF0

DIF1

LRCK

SCLK

SDTI

SDTO

NAME

Positive Voltage Reference Input, VA

Negative Voltage Reference Input, AGND

Rch Analog Positive Input

Rch analog Negative Input

Lch Analog Positive Input

Lch analog Negative Input

Analog Power Supply

Analog Ground

Audio Data Interface Format

Input/Output Channel Clock

Audio Serial Data Clock

Audio Serial Data Input

Audio Serial Data Output

FUNCTION PIN

NO.

15

16

17

18

19

20

21

22

23

24

25

26

27

28

I/O

I

I/O

I

-

I

O

MCLK

DEM0

DEM1

TST3

TST2

TST1

VD

DGND

/PWDA

/PWAD

CMODE

AOUTL

AOUTR

VCOM

NAME

Master Clock Input

De-emphasis Frequency Select

Test Pins (Pull Down Pins)

Digital Power Supply

Digital Ground

DAC power-Down Mode

ADC power-Down Mode

Master Clock Select (“H”:384 fs,“L”:256 fs)

Lch Analog Output

Rch Analog Output

Common Voltage Output, VA/2

FUNCTION

AK4520A-VF-E2 (XT802A00) DAC & ADC MAIN IC301

IC BLOCK DIAGRAM

TC74HCU04AF-TP1 (XD660A00)

Hex Inverter

1

2

3

4

5

6

7

1A

1Y

2A

2Y

3A

3Y

Vss

14

13

12

11

10

9

8

VDD

6A

6Y

5A

5Y

4A

4Y

TC74HC14AF-TP1 (XD657A00)

Hex Inverter

1

2

3

4

5

6

7

1A

1Y

2A

2Y

3A

3Y

GND

14

13

12

11

10

9

8

VDD

6A

6Y

5A

5Y

4A

4Y

SN74HC174NSR (XD836A00)

Hex D-Type Flip-Flop

Q

DCK CK

C K

DCK

GG

CLEAR

1Q

1D

2D

2Q

3D

3Q

GND

116

215

314

413

512

611

710

8 9

Vcc

6Q

6D

5D

5Q

4D

4Q

CK

Q

D

GG

Q

DCK

GC K

Q

D

G

Q

D

SN74HC374ANSR (XQ042A00)

Octal 3-State D-Type Flip-Flop

Q

DCK

OE

Q

DCK

OE

Q

DCK

OE

Q

DCK

OE

OUTPUT

CONTROL

1Q

1D

2D

2Q

3Q

3D

4D

4Q

GND

120

219

318

417

516

615

714

813

912

10 11

Vcc

8Q

8D

7D

7Q

6Q

6D

5D

5Q

CLOCK

Q

DCK

OE

Q

DCK

OE

Q

DCK

OE

Q

DCK

OE

TC4053BF (XB738A00)

TC74HC4053AF (XR150A00)

Multiplexer/Demultiplexer

1

Switches IN/OUT

2

3

4

5

6

7

8

do. Y0

do. Z1

Z

Z0

Commons OUT/IN

Swiches IN/OUT

Control Inhibit

-DC Voltage Supply

do

VDD

Y

X

X1

X0

A

B

C9

10

11

12

13

14

15

16 +DC Voltage Supply

Commons OUT/IN Y

do. X

Swiches IN/OUT X0

do X0

Control Input A

do. B

do. C

Y1

Y0

Z1

Z

Z0

INH

VEE

VSS

Y1

NJM4558MT-1 (IG103520)

NJM2068MD-T1 (XJ553A00)

NJM4556AMT1 (XQ138A00)

µPC4570G2 (XF291A00)

Dual Operational Amplifier

1

2

3

4-V

8

7

6

5

Output A +V

Non-Inverting

Input A

-DC Voltage Supply

+DC Voltage

Supply

Output B

Inverting

Input B

Non-Inverting

Input B

Inverting

Input A

+-

MAIN IC106

MAIN IC105 MAIN IC307 – 309

MAIN IC111 MAIN IC113

IC108

MIX IC103 – 112

IC115, 120, 101, 102, 113, 114,

116 – 118, 119

MAIN IC303 – 306, 310, 311

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

MD4S

16

B1

21

23

VCCA VCCB

24

B8

14

131211

1

2DIR

22G

10A8

3A1

Logic

Level

Converter

Same as above block

VCCA

DIR

A1

A2

A3

A4

A5

A6

A7

A8

GND

VCCB

G

B1

B2

B3

B4

B5

B6

B7

B8

GND

(TOP VIEW)

INPUTS OUTPUTS FUNCTION

G

L

H

DIR A-BUS B-BUS

L

H

X

A=B OUTPUT INPUT

B=A INPUT OUTPUT

Z High lmpedance

X : Don't Care

Z : High lmpedance

1

2

3

4

5

6

7

8

9

10

11

12

15

14

13

18

17

16

21

20

23

24

22

19

SDATA

XIN

XOUT DIG15

DIG12

DIG11

DIG00

SCK

CS 14

15

16

20

18

17

RESET

SEG35

SEG27

SEG26

SEG00

23

31

33

59

1

12

61

64

P1

P0

SEGMENT

OUTPUT

CIRCUIT

OUTPUT

PORT

(2 BIT)

CGRAM

(35 BITX16)

CGROM

(35 BITX160)

DECODERDECODER

DISPLAY CODE

REGISTER

(8 BITX16)

SERIAL

RECEIVE

CIRCUIT

CORD/

COMMAND

CONTROL

CIRCUIT

DISPLAY

CONTROL

REGISTER

DISPLAY

CONTROLLER

CLOCK

GENERATION

DIGITAL

OUTPUT

CIRCUIT

16

TC7S86F1 (XR681A00)

Exclusive OR Gate

TC74LVC4245FS (XU229A00)

Dual Supply Octal Bus Transceiver

1 5

2

34

IN B

GND

Vcc

OUT Y

IN A

M66004SP (XN173A00)

16 Digit 5 X 7 Sement VFD Controller

MAIN IC114

MAIN IC202

SUB IC801

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

MD4S

17

EPROM(IC104)REMOVAL AND INSTALLATION

1. Removing the EPROM

1-1 Insert a sharp tweezers into the gap of socket

and lift the one side of EPROM by hooking

it. When the one side is raised, insert the

tweezers into other gap and lift the EPROM

as well. (Fig. 1, Fig. 2 and Fig. 3)

1-2 Repeat the procedure in 1-1 alternately to

remove the EPROM.

Note: If the tweezers is hooked too strongly, the

EPROM jumps up and breaks. Remove the

EPROM by pressing down with a finger as

shown in Fig. 2.

2. Installation of the EPROM

2-1 Put the EPROM on the socket, then check

that the EPROM moves slightly by moving it

gently with a finger. (Fig. 4)

2-2 Set the EPROM into the socket by pressing

down until it clicks. (Fig. 5)

Note: Be sure to check the following items after the

installation of EPROM.

1. Four corners of EPROM are securely fit in

the frame.

2. There is no damage with hooks or defective

hooking.

EPROM

Gap

IC Socket

Tweezers

EPROM

IC Socket

1st pin

1st pin (Double circle side)

: OK

: NG

XV501

MD4S

A

Components side inprint IC 104 (XV501A00, EPROM with label)

EPROM

(Fig. 1)

(Fig. 4) (Fig. 5)

(Fig. 3)(Fig. 2)

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

MD4S

18

to SUB 1/3 - CN801

to MIX 1/2 - CN108 to SUB 2/3

- CN705 to MIX 1/2

- CN105

Component side Pattern side

to MD MECHA

- CN102 to MD MECHA

- CN103 to MD MECHA

- CN191

N.C. N.C. to SUB 2/3 - CN707

3NA-V279990 4

CIRCUIT BOARDS

MAIN Circuit Board

Note : See parts list for details of circuit board component parts.

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

MD4S

19

to MAIN - CN110 to SUB 2/3 - CN704 to MAIN - CN108

to MIX 2/2 (INPUT)

- CN601

to MIX 2/2 (INPUT)

- CN603

to MIX 2/2 (INPUT)

- CN604

to SUB 2/3 - CN708

CUE MIX

STEREO

STEREO4321

to MIX 2/2 (INPUT)

- CN602

to SUB 3/3 - CN902

Component side

MONITOR

SELECT

MONITOR

SELECT

3NA-V279950 2

MIX 1/2 Circuit Board

Note : See parts list for details of circuit board component parts.

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

MD4S

20

Pattern side

3NA-V279950 2

MIX 1/2 Circuit Board

Note : See parts list for details of circuit board component parts.

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

Yamaha MD4S User manual

Popular Recording Equipment manuals by other brands