BOSS DR 550MKII SERVICE NOTES

Page 1

APRIL.1992 DR-550mk2

@ans DR-SSDMKII SERVICE NOTES

Dr. Rhythm

ERRATA&SLPPLEMENTis attached at theendof the page. 0
DDDDDDDDDDDDDDDDDD

TABLE OF CONTENTS E3: Page

First Edition

SPECIFICATIONS/EH

~ Number 01 Tones/ Wfiifiégfl"
- Mximum Polyphony/fiififi'fi'
. Memory Capacity/ 2 T: U -§fi'"~

: 64 Preset Patterns
84 Programmable Patterns
(Configuration:Scale 1 to 4.Last Step 1 to 16)
8 Songs
(Max. 160 bars/Song ,1230 bars by using Song Chain lunction)
(ax 160/I\ifi/1I-��.J ya 5- 1 4 ytfiifiélfifi L'anc 1280/l\imi§tfa;i§fii-��)

- Tempo ......................................... _ J M0 to 250
- External Data Storage/ 919313} E 'J : Audio Cassette Tape
SPECIFICATIONS {ifi ................................................... 1 . External Sync/919.359 19 mafifiE : MIDI
EXPLODED VIEW 9%. """"""""""" " 2 . Output Level/Hid] 1m» ------------- Max. 6.5 Vp_p (L or R)
DR-550m k2 DISASSEMBLY PROCEDURE DR - 550mk2 fifljiifi / Efi -------------- 3 Max. 035 Vp_p (Tape Save)
AND PRECAUT|ONS . Noise Level/ / 4 X I/\II4"" ~~: Less than - 825 (1an (L or R)
PARTS LIST /\'- \y I} z I. ....................................... 4 - Power Source/Iii? ~~~~~ : DC 9V.SUM-3 Battery x 6 or Ac Adaptor (Option)
- Battery Life] immgfiu : Approx, 9hrs. (manganese), 23hrs, (alkaline type)
u 9] . . . .
EISgL'fiEBAEGSFéfixpI-ION égngégfi. ........................................... g Morena(vyfiyiim),2sa§r.1(7iwa Vim)
These figures will vary depending on the actual conditions of use
CIRCUIT BOARD(MAIN BOARD) gm. ( x 4 jifi) .............................. 6 fifitfilfilfirmlé
CIRCUIT DIAGRAM (MAIN BOARD) [33%. ( X 4 ygfi) """""""" 7 . Current Drawl : 90mA
IDENTIFYING VERSION NUMBER IV-D a 23- JK-(DiflajiE. .. 8 . Dimensions~~ : 188(W)><157(D)X41(H)mm
SETTING FACTORY PRESETS '7 7 7 I~ 'J -7' 'J IZ y I~ @flififi """ " 8 7'7/5IWI X 64/1503) X 15/3() "whes
DATA SAVE AND LOAD ;_ g a) I: _ jé El ._ F0755? ........ .. 8 - Weight": ------ : 5109/1 lb. 2 oz. (including batteries)
TEST MODE 7:; I E- F _ _ ' .. 9 - AOCeSSOI'IeS : DryoellBatterySUM-SS 1.5V( >< 6pm)
TROUBLESHOOTING I 5 7H; :J 1 _ 7__ 4 77' 10 :3§a::::u::r;si(:;ymo:: Battery SUM-38) does not supply as replacement
IC DATA IC 7.- 9 .......................................... 11 Jzéflwfilinfi': (Dry cell Battery SUMGS) 3 fiufi'rCéO'E» mfifiéfiifi'fi L
APPENDIX -5 ................................................. 12 ClzL fltfifiéifl/vo
Owner's Manual Set (Japanese) :PNo.26055163
Owner's Manual Set (English) :PNo.26055164
. Options ........................................................ ; AC Adapter BOSS PSA Series
Display Cover
(22045395)
LCD LED(red)
RCD-1-013R GL8PR25
[FRONT PANEL] (15029505) (15029324)
Switch Jack Jack
SSSU11 YKBZ1-5130 YKBZ1-5129
(13159168) (13449433) (13449428)
Knob '-
(22435211) To Case Ass' _I 53.3: m m m is a manner we 5. $040 mum
TM-3 VR Spacer p y 533' n can
(2216035300) (22045431) . Q 0 0 ° ° ._, 80mm case [my
Pot.
FlK14K1230 50kB x 2 N J (22045428)
. (13279966) [REAR PANEL] Jack Jack DIN Socket
Rum SW"° HEC-2305-01-250 HLJ0521-01-110 M»SZ-3P
(22495241) (13449720) (13449133) (13429642)

Top Case Assy
(22045431 )

@Rotand 17059647

Printed in Japan BOBE (DP) 1

Copyright 0 use by nouum CORPORATION

Page 2

APRIL.1992

DR-550mk2
w EXPLODED VIEW, fig. Before removing or installing the shield cover. please refer to DR-550mk2 disassembly procedure and precautions'fl
«If»: (p13)
No. -PARTS NAME- -PARTS No.- 9-» PER HIDHIM/lelflaém FDR-szfiWDfE/EEJ (13.3) afiflaLrTzw
® Knob -------- : 22485211
® VR Spacer : 2216035300
© Display Cover ~~ : 22045395
g @ Top Case Assy ~~~~~~~~~~~~~~~~ 2 22045431
3: 1 We do not supply the Top Case separately.
Top oaseobwetaalmugeh.
(9 Rubber Switch ~~~~~~~~~ ~~~~~ : 22495241
© LCD RCD-1-O13R ----- -: 15029506
® Rubber Connector for LCD ~ ~: 23365653
.Main Board Assy ~~~~~~~ 4: 7316903000
2:: Replacement Main Board Assy consists of the following 2 PCBs.
1:513:13an Board Assy 11 Téemzfilfibéfifilwhito
Main Board Assy (1/ 2) (pcb 2292586803 1/2)
Main Board Assy (2/2) (pcb 2292586803 2/2)
(9 Bottom CBS ............. ................ 2 22045427
® Battery Box Assy ': 23425822
0) Terminal Spring (+/-) ~: 23455182
02) Terminal Spring (+) -~ ~ 23455180
63) Terminal Spring (-) 23455181
® Battery Case 22015963
{9 Battery Cover ~: 22065210
® Shield Cover ~~~~~~~~ : 22255299
u, [SCREW]
*1 2.6 x 6mm Binding Pvtight FeNi
3.:
3a?

Bottom Case removal screws ® x 7005.