Roland MP-70 Operating and maintenance manual

MP-70
KSC-34-BK
DIGITAL PIANO
SERVICE NOTES
Issued by RJA
Copyright © 2006 ROLAND CORPORATION
All rights reserved. No part of this publication may be reproduced in any form without the written
permission of ROLAND CORPORATION.
Printed in Japan (0000) (TP-M)17058419E0
June.2006 MP-70/KSC-34-BK
TABLE CONTENTS
TABLE CONTENTS..........................................................1
CAUTIONARY NOTES ...................................................2
SPECIFICATIONS.............................................................3
LOCATION OF CONTROLS ..........................................4
LOCATION OF CONTROLS PARTS LIST ...................4
EXPLODED VIEW ............................................................6
EXPLODED VIEW PARTS LIST .....................................7
EXPLODED VIEW (View 1,2,Rear) ................................8
EXPLODED VIEW (View 1,2,Rear) PARTS LIST.........9
EXPLODED VIEW (View 3,4,Bottom) .........................10
EXPLODED VIEW (View 3,4,Bottom)
PARTS LIST....11
EXPLODED VIEW (Fig.A).............................................12
EXPLODED VIEW (Fig.A) PARTS LIST......................12
EXPLODED VIEW (Fig.B) .............................................13
EXPLODED VIEW (Fig.B) PARTS LIST ......................13
KEYBOARD EXPLODED VIEW / PARTS LIST ........14
WIRING DIAGRAM.......................................................16
DISASSEMBLY PROCEDURE ......................................18
PARTS LIST......................................................................19
CHECKING THE VERSION
NUMBER / TEST MODE..........24
BLOCK DIAGRAM.........................................................26
CIRCUIT BOARD(MAIN) .............................................28
CIRCUIT DIAGRAM(MAIN 1/4) ................................30
CIRCUIT DIAGRAM(MAIN 2/4) ................................32
CIRCUIT DIAGRAM(MAIN 3/4) ................................34
CIRCUIT DIAGRAM(MAIN 4/4) ................................36
CIRCUIT BOARD(PANEL) ...........................................38
CIRCUIT DIAGRAM(PANEL)......................................40
CIRCUIT BOARD(AMP)................................................42
CIRCUIT DIAGRAM(PABM)........................................44
CIRCUIT DIAGRAM(PHONES)...................................46
PIANO STAND (KSC-34-BK)
STAND EXPLODED VIEW ...........................................48
STAND EXPLODED VIEW PARTS LIST ....................49
HOW TO ASSEMBLE
THE STAND (Disassembling).............50
PARTS LIST(STAND).....................................................51
ERROR MESSAGES ........................................................52

2
June.2006
CAUTIONARY NOTES
Before beginning the procedure, please read through this document.
USER DATA
Any performance that has been recorded is deleted when the power to the MP-70 is turned off.
A performance cannot be restored once it's been deleted.
If you do not want a performance to be deleted, use Song Backup (Owner's Manual p. 31).
PARTS LIST
A component whose part code is ******** cannot be supplied as a
service part because one of the following reasons applies.
• Because it is supplied as an assembled part (under a different part code).
• Because a number of circuit boards are grouped together and
supplied as a single circuit board (under a different part code).
• Because supply is prohibited due to copyright restrictions.
• Because reissuance is restricted.
• Because the part is made to order (at current market price).
CIRCUIT DIAGRAM
In the circuit diagram, 'NIU' is an abbreviation for 'NOT IN USE'.
The circuit board and circuit-board diagram show silkscreened indications,
but no components are mounted.

3
MP-70/KSC-34-BK
SPECIFICATIONS
fig.spec
* In the interest of product improvement, the specifications and/or appearance of this unit are subject to change without prior notice.
Keyboard
Keyboard 88 keys (Compact Progressive Hammer Action Keyboard)
Touch Sensitivity Preset 4 levels
Keyboard Modes Whole, Dual (volume balance adjustable), Split (split point adjustable), Twin Piano
Sound Generator
Max. Polyphony 64 voices
Tones 15 tones in 5 groups
Temperament 7 types, tonic selectable
Stretched Tuning 2 types
Master Tuning 415.3 Hz - 466.2 Hz (adjustable in increments of 0.1 Hz)
Transpose Key Transpose (-6 - +5 in semitones)
Effects Reverb (8 levels), Chorus (8 levels), Sympathetic Resonance (for Piano only, 8 levels)
Metronome
Beat 2/2, 0/4, 2/4, 3/4, 4/4, 5/4, 6/4, 7/4, 3/8, 6/8, 9/8, 12/8
Volume 8 levels
Recorder
Tracks 2 tracks
Song 1 song
Note Storage Approx. 5000 notes
Tempo Quarter note = 20 - 250
Resolution 96 ticks per quarter note
Control Play/Stop, Rec, Tempo, All Song Play, Track Select, Song Backup
Preset Songs 66 songs + 7 Tone demo songs
Others
Rated Power Output 25 W x 2
Speakers 12 cm x 2
Display
Beat LED
7 segments, 3 characters (LED)
Headphones indicator
Control Volume, Brilliance (3 levels)
Pedals Damper, Soft, Sostenuto
Other Functions Panel Lock, Tone Lock, Song Backup
Connectors
Output jacks (L/Mono, R), Input jacks (L/Mono, R), Headphones jack x 2 (Stereo), MIDI In connector,
MIDI Out connector, Pedal jack
Power Supply AC 117 V
Power Consumption 55 W
Dimensions
(including piano stand)
1,392 (W) x 422 (D) x 818 (H) mm / 54-13/16 (W) x 16-5/8 (D) x 32-1/4 (H) inches
1,392 (W) x 422 (D) x 987 (H) mm / 54-13/16 (W) x 16-5/8 (D) x 38-7/8 (H) inches (including music rest)
Weight
(including piano stand) 42kg / 93 lbs
Accessories Owner’s Manual (#73234590)
Power Cord (#02238801)
Headphones (#********)
Headphones Hook (#03901267)

5
June.2006 MP-70/KSC-34-BK
4
LOCATION OF CONTROLS
fig.panel-e@L
LOCATION OF CONTROLS PARTS LIST
No PART CODE PART NAME DESCRIPTION1 Q’TY
1 03676078 R R-KNOB S-ELA-A BLK/LWG 1
2 02016278 Y C-KEYTOP MD1H BLK 2
3 02016289 Y C-KEYTOP MD2H BLK 3
4 02010456 Y C-KEYTOP MD4H BLK 3
5 02016245 Y C-KEYTOP MX2H BLK 1
D-1 01239867 LED (RED/GREEN)CLR SML72423C TP15 9
D-2 01904112 LED(RED) SLR-342VCT32 N.P.Q RANK 10
D-3 15029348 LED (GREEN) SLR-342MCT32 1
D-4 00899023 LED LNJ282RKRXE 1
D-5 00451423 7SEG LED LB-303VA 1
V-1 13289251 POTENTIOMETER RK14K12CO 10KB W/CENTER TAP 1
6 02901545 DISPLAY COVER 1
7 13429676 MIDI CONNECTOR YKF51-5048N (TWIN) 1
8 13449252 6.5MM JACK YKB21-5006 (STEREO W/SW) 3
9 13449283 6.5MM JACK HLJ7101-01-3010 4
10 02230989 AC INLET M1934(INL-19) 5/2.5A 125/250V 1
a 40011501 SCREW M3X8 PAN MACHINE W/SW BZC 6
b 40011312 SCREW 3X8 BINDING TAPTITE P BZC 4
(all Switch) 01340290 SWITCH TACT SWITCH EVQ11A05R H=5.0 22
BOTTOM PANEL
FRONT PANEL
REAR PANEL
Keytop & Others
LED & Volume
Screw
Jack
Screw
Jack & Others
12
V-1
344365342
D-1 D-1
D-4 D-2 D-1 D-2 D-1 D-5 D-1 D-3 D-1
D-2
78910 8
abba
a
a
abb
a

6
June.2006
EXPLODED VIEW
fig.explo
23
25
3
2
4
5
6
19
13
18
11
8
7
10
16 15
17
14
28
29
31
30
24
12
1
21
27
26
4
22
Refer to Fig.A
Refer to Fig.B
23
24
Refer to Fig.B
9
20
Rear
View 2
View 1
Bottom
View 3
View 4

7
MP-70/KSC-34-BK
EXPLODED VIEW PARTS LIST
No PART CODE PART NAME DESCRIPTION1 Q’TY
1 72452145 MUSIC REST ASSY 1
2 04232301 TOP BOARD BOARD 1
3 01568678 TOP BLIND 1
4 00890923 BUSHING D-71 2
5 00900478 TOP BOARD HOLDER 4
6 04232312 LID BOARD BOARD 1
7 03344789 LID BLIND 1
8 00900378 LID BLIND CAP 2
9 71127201 LID SHAFT ASSY 1
10 72908512 KEYBOARD ASSY CPA-5 KBD 88P-B 1
11 03344823 REAR PANEL 1
12 72786067 VOLUME BOARD ASSY 1
13 72785856 PANEL BOARD ASSY 1
14 73231456 MAIN BOARD ASSY 1
15 04013123 PWB HOLDER 2
16 73231423 PABM ANALOG PHANTOM UNIT 1
17 04234434 PABM COVER COVER 1
18 72787867 INLET BOARD 100/117 1
19 02896045 TRANSFORMER UNIVERSAL 1
20 04234412 TRANS COVER COVER 1
21 01907601 CENTER HOLDER 1
22 04234456 CENTER HOLDER HOLDER 1
23 02896112 FULL-RANGE SPEAKER PD-12355AON 2
24 01566467 SPEAKER COVER 2
25 72896789 PHONES BOARD ASSY 1
26 72454101 POWER SW ASSY 1
27 04232334 BOTTOM BOARD BOARD 1
28 72014589 LED BOARD ASSY 1
29 40346189 PHONES LABEL 1
30 03344845 LOWER BLIND 1
31 01346323 LID CUSHION 1

8
June.2006
EXPLODED VIEW (View 1,2,Rear)
fig.explo-hei-1
View2
View1
Rear
c
dd
d
1
a
f
e
b

9
MP-70/KSC-34-BK
EXPLODED VIEW (View 1,2,Rear) PARTS LIST
View 1
View 2
Rear
No PART CODE PART NAME DESCRIPTION1 Q’TY
1 01566378 CUSHION 3
c 40239401 SCREW M3.5X8 BINDING TAPPING A BZC 13
d 40010645 SCREW M4X8 TRUSS TAPPING A1 FE BZC 8
No PART CODE PART NAME DESCRIPTION1 Q’TY
d 40010645 SCREW M4X8 TRUSS TAPPING A1 FE BZC 21
No PART CODE PART NAME DESCRIPTION1 Q’TY
e 40011090 SCREW 3X6 BINDING TAPTITE B BZC 4
f 40011123 SCREW 4X8 BINDING TAPTITE B BZC 8
a 40011501 SCREW M3X8 PAN MACHINE W/SW BZC 4
b 40011312 SCREW 3X8 BINDING TAPTITE P BZC 2

10
June.2006
EXPLODED VIEW (View 3,4,Bottom)
fig.explo-hei-2
g
k
jh
i i
b
a
m
h
l
g
oo
gg
n
g
g
g
View3
View4
Bottom
g

11
MP-70/KSC-34-BK
EXPLODED VIEW (View 3,4,Bottom) PARTS LIST
VIew 3
View 4
Bottom
No PART CODE PART NAME DESCRIPTION1 Q’TY
g 40012101 SCREW 4X14 TRUSS TAPPING A1 FE ZC 36
h 40346201 SCREW 4X20 TRUSS TAPPING TWIN BZC 8
i 40011101 SCREW 3X8 BINDING TAPTITE B BZC 6
j 40011056 SCREW 3X6 BINDING TAPTITE B ZC 4
k 40346190 SCREW 4X16 TRUSS TAPPING TWIN BZC 3
No PART CODE PART NAME DESCRIPTION1 Q’TY
g 40012101 SCREW 4X14 TRUSS TAPPING A1 FE ZC 6
No PART CODE PART NAME DESCRIPTION1 Q’TY
a 40011501 SCREW M3X8 PAN MACHINE W/SW BZC 2
b 40011312 SCREW 3X8 BINDING TAPTITE P BZC 2
m 40128512 SCREW 4X25X20 PAN WASHER HEAD TAPTITE B BZC 10
n 40563345 SCREW H4X25X17 TAPTITE P W BZC W=12.5 24
o 22285342 CONNECTING PIN 228-342 2