APRIL.1992
DR-550mk2
obqss
DR-550
MK
n
Dr
Rhythm
ERRATA
&
SUPPLEMENT i
s
attached at
the
end of
the
page, it
DDDDDDDDDDDDDDDDDD
TABLE OF
CONTENTS
Page
SPECIFICATIONS
1
EXPLODED
VIEW
2
DR-550mk2
DISASSEMBLY
PROCEDURE
DR
—
550m
k2
/
}£.&
3
AND
PRECAUTIONS
PARTS LIST
BLOCK
DIAGRAM
CIRCUIT
DESCRIPTION
CIRCUIT
BOARD(MAIN
BOARD)
CIRCUIT
DIAGRAM (MAIN
BOARD)
IDENTIFYING
VERSION
NUMBER
SETTING
FACTORY
PRESETS
DATA SAVE
AND LOAD
TEST MODE
TROUBLESHOOTING
1C
DATA
APPENDIX
IJ
7s
h
4
y
0
0
5
mam
5
«KH(*-f y&fa)
6
7
A-va
8
7rn
u-yufey
8
8
h
:
E—
K
9
h
7^
10
ICx-*
11
nm
12
SERVICE
NOTES]
First Edition
SPECIFICATIONS/
tttH
•
Number of Tones/
: 91
•
Mximum Polyphony/
: 12
•
Memory
Capacity/
U
—
WS
:
64 Preset Patterns
64
Programmable Patterns
(Configuration:Scale 1 to 4, Last Step 1
to
16)
8
Songs
(Max. 160
bars/Song ,1280 bars by
using Song Chain function)
(
**
1 60
/j\g&
/
ft
,
v
y
y
*
x
d i
1 280
/j\as©a^3iiipriii
)
•
Tempo
•
External Data Storage/
>€U-
•
External Sync/^^3
v
'y$
$$!§
•
Output Level/
tht)
•
Noise Level/
J
d
X
•
Power Source/®}®
•
Battery Life/
•
Current Draw/
g
•
Dimensions
•
Weight
•
Accessories
•
Options
J
=40
to 250
Audio
Cassette Tape
MIDI
Max. 6.5 Vp_p
(L or R)
Max. 0.35 Vp_p (Tape
Save)
Less
than
-
82.5 dBm (L or R)
DC 9V,SUM-3
Battery
x
6 or AC Adaptor (Option)
Approx. 9hrs. (manganese), 23hrs.
(alkaline type)
i
m
9
$1®
(
-7
y
n
),23
n$y
|
NOTE
|
These figures will vary
depending on the actual conditions of use.
[
si
mmmmm
90mA
188(W)
x
157(D)
x
41
(H)mm
7-7/1
6(W)
x
6-3/1
6(D)
x
1-5/8(H)
inches
51
0g/1
lb. 2 oz.
(including batteries)
Dry cell Battery
SUM-3S 1 .5V
(
x
6pcs)
I
NOTE
1
The above parts(Dry cell Battery SUM-3S) does not supply as replacement
parts, because it is goods.
HOT]
(Dry cell Battery SUM-3S)
mmMUdit
L
m
Owner’s Manual
Set (Japanese) :PNo. 260551 63
Owner’s Manual Set (English) :PNo.260551 64
AC Adaptor BOSS PSA
Series
—
Display
Cover
Rubber
Switch
(22495241)
Top Case
Ass’y
[FRONT
PANEL]
(22045395)
LCD
RCD-1-013R
(15029506)
LED(red)
GL8PR25
(1
5029324)
Knob
(22485211)
TM-3 VR
Spacer
(2216035300)
Pot.
RK14K1230
50kB
x
2
(13279966)
(22045431)
Switch
Jack
Jack
SSSU11
(13159168)
YKB21
-5130
(13449433)
YKB21
-5129
(13449428)
Bottom Case
Ass’y
(22045428)
1 7059647
Printed in Japan
B0BE (DP) 1
Copyright
© 1992
by
ROLAND
CORPORATION
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