Yamaha mdr 3 mdr 3p service manual

Page 1

MUSIC DISK RECORDER

MDR-3/MDR-3P

[MDR-3 ZU\C\H
MDR-3P Z J

ICONTENTS (E 32)

SPECIFICATIONS (MR) I LOADING AND EXECUTION OF IPL
PANEL LAYOUT (WNW/{7'7 I) ------------ 2 (IPLEI- Fmfiifitfifi) ................................ . 15
CIRCUIT BOARD LAYOUT (llyII/{TJII 3 FILE FORMAT (774)1/72-7Iy I) """"""" 16
' BLOCK DIAGRAM (70 '7 7-) LED MATRIX (LED? l~ I) 7;) ..................... 16
L8! DATA TABLE (LSI§«%%I§§E§E) SWITCH MATRIX (X47927LI171) 18
IC BLOCK DIAGRAM (Icvu vaIzlw DISK INPUT/OUTPUT (?4 xaaaI/o) 18
DISASSEMBLY PROCEDURE (fifié$flfi) 8 ERROR MESSAGES (15..., 12-, ...... 18
CIRCUIT BOARDS <9- IEfiil) -------------- 10 MIDI IMPLEMENTATION CHART ----- ~ - 19
DISK FORMAT (T4 1773-? I) """"" 14 OVERALL CIRCUIT DIAGRAMGVEEIEél)" -- 20
PARTS LIST

#

YAMAHA CORP.

3.0K-86 CG) Printed in Japar, 8811

EL I oomsa Revised Edition

Page 2

MDR-3

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: The 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 principle-agent relationship of any form.

The data provided is believed 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 distributors
Service Division.

WARNING:

Static discharges can destroy expensive components. Discharge any static electricity your

body may have accumulated by grounding yourself to the ground buss in the unit (heavy
gauge black wires connect to this buss).

you apply power to the unit.

ISPECIFICATIONS (teams)

Model:
Recording media:
Disk format:
Memory capacity:
Control:

Display:

Other eoponem;
Input/Output ieeks:
Rated Input voltage:
rated input current:

Rated power
consumption:
External dimensions:
Welght:
Accessories:

Options:

Music Disk Recorder

3.5'inch microfloppy disks (2DDl

MSX-DOS (MS-DOS Ver. 1.25)

634k bytes / 15 songs maximum
RECORD/FORMAT, SONG SELECT/TEMPO
+ /Dl>,SONG SELECT/TEMPO -/ [CUSTOM PLAY, STOP, PAUSE,

RECORD Section: UPPER / SONG REPEAT,
LOWER, PEDAL / SONG COPY FROM,
CONTROL / SONG COPY TO.

PLAY Section: UPPEFL LOWER, PEDAL,
CONTROL/SONG DEL, SHIFTi

Four-digit seven-segment LED

POWER switch, disk drive, EJECT button
MIDI IN, MIDI OUT, MIDI THRU, DC IN.

10 V DC

Minimum 700 mA up to 1A

7.5 W

135 (W) x 200 (D) X 63.5 (H) mm

1.3 kg

3.5-inch 2DD microfloppy disk x 1

MIDI cable (1.5m length) x 2

Auxiliary operation sheet

Mounting bracket BRT-3 (for use with the HS
Series Electone)

Power adaptor PA-3L or

PA<4 (PA-40 for the USA)

"inference: Memes of the Created Files]

Registration files
Event files

MDR_nn.ROO
MDFl_nn.EVT
nn=00 to 15 (Song Nos. 01 to 16)

EETEéEI!

$4297a-7vi
xiv-$5
expema
*wx4vf

iisifi
emfimaybn-n

Aflififl?

EHAmEE
Eieliit
fifth

sfiflw x D x H)
E I

fillfi.

IMPORTANT: Turn the unit OFF during disassembly and parts replacement. Rechecka_|lwork before

3.54 /+ 7n ,, Eir 17 F
9470Dm
MSX-DOS(MS-DOS Ver.1.25)
634K¢4 l

163%

RECORD/FORMAII SONG SEL
ECT/TEMPO+/l>(> SONG SEL
ECT/TEMPO -/ TOM PLAY. STOR PAUSE
V=~Ft7>aVIUHERSO
NG REPEAT, LOWER PEDAL
/SONG COPY FROM CONTRO
L/SONG COPY T0
fl/{£792 / 1 UPPER LOW
ER PEDAL CONTROL/ SONG
DEL SHIFT

4h? 7% 7)! x |~LED

NV-Xa' »y+s7"4 X7 F5472
f i 1 7 l £7 7

MIDI IN MIDI OUTs MIDI TH
RU» DC IN

DC 10V

700mA

75w

135X200X63.5mm

Lfig
354>%2m3747u7nvfi
-7"4 X 7 X 1

MIDI 7-711(].5m) X2
ACTVfy- PA-3L x 1