Boss Dr. Rhytm DR-550 MK II Service Notes

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