Roland MC-50 Service Notes

Jun,
1990
MC-50
ISERVICE NOTESI
MICRO
COMPOSER
First Edition
SPECIFICATIONS/tirfU
Disk Drive -r
't
7^0
•
if
Memory Capacity ISISSS
' '
Dispiay
MIDi
START/STOP
PUNCH iN/OUT
METRONOME OUTPUT
TAPE SYNC
iN
Power Consumption
Dimensions
(including projections)
Weight fiS
3.5inch
2DD
Micro Floppy Disk
Accesories
(RAM) 256Kbytes
(Disk)
720Kbytes
2line,
20character
(with backlight)
IN,
THRU, OUT1, OUT2
OFF-OV,
ON-5V
OFF-OV,
ON-5V
VR max 0.8Vp_p/1.2KQ
Level
—20
to
OdBv
(0dBv=0.775Vrms)
Impedance
59KQ Options
Level
0.7Vp_p
(-10±3dBv, @50KQIoaded)
Impedance 820
Q
800mA/9V
280(W)X271(D)X47(H)mm
11"X
10-5/8" X1-7/8"inch
1.8kg/4lb.
•••
MF-2DD
(Part No. 22405126)
MIDI
CableX2
(Part No.
23485228)
AAC
Adaptor
ACM
00 (Part
No. 12449603)
ACM
20 (Part No.
12449604)
ACI-220
(Part
No. 12449605)
ACB-240E
(Part
No. 12449564)
ACB-240A
(Part
No. 12449549)
Owner's Manual Set
Japanese (Part No. 26045109)
English (Part No. 26045110)
••• Pedal Switch DP-2
Software
MRD-500
MRB-500
MRP-500
SUPER-MRC
Top Case
-
(22015981)
Display
Cover
(22045247)
LCD
Unit
EA-D20225PX-1
(15029494)
LED Cover
(22025792)
X
15pcs
Keytop-SM (black)
—
(22495242)
X
29pcs
Keytop-M
(black)
—
(22495180)
X
8pcs
Knob a
-DIAL
(22485106)
Rotary
Encoder
EC16B40B
(13279989)
Disk Drive Unit
JU-253A3M
(12409132)
[^Roland
Printed
in
Japan BA-2
(CR)
TABLE
OF CONTENTS
SPECIFICATIONS
EXPLODED VIEW
PARTS
LIST
BLOCK DIAGRAM
1C
DATA
TEST
PROGRAM
CHANGE INFORMATION
IDENTIFYING VERSION
NUMBER
MAIN
BOARD
PANEL BOARD
ENCODER BOARD
Page
i±m
1
'mm
2
/\°-'yUXh 3
z^'nyCfm 4
ICx-^
5
6—8
9
/'V—
V
3
—
9
10
K
10
x>zi -
K
10
CIRCUIT
DIAGRAM
11
(MAIN
BOARD, PANEL BOARD,
ENCODER
BOARD)
(X
K,
K,
X>=l-^'--/f-
K)
Jack MIDI Socket Jack Pin Jack
HEC-2305-01-250 M-S2-3P YKB21-5018 YKC21-0219 (dual)
Button
Jack
Chassis
(22815750)
(12499175)
YKB21-5012
(13449146)
X
2pcs
Copyright
©
1990 by
ROLAND CORPORATION