Roland A-70, Service Manual

Page: 1 / 27

A-70 Sept, 1997
SERVICE NOTES
TABLE OF CONTENTS
Page
SPECIFICATIONS 1
DISASSEMBLY 1
LOCATION OF CONTROLS & REAR VIEW 2
EXPLODED VIEW N.1 3
EXPLODED VIEW N.2 4
KEYBOARD PARTS LIST 4
BLOCK DIAGRAM 5
MAIN PCB ASSY 6
CIRCUIT DIAGRAM (MAIN PCB ASSY) 7
PRIMARY PCB ASSY & CIRCUIT DIAGRAM 8
LEFT CONTROL PCB ASSY 8
CIRCUIT DIAGRAM (LEFT CONTROL PCB ASSY) 9
AFT PCB ASSY & CIRCUIT DIAGRAM 10
RIGHT CONTROL PCB ASSY 10
CIRCUIT DIAGRAM (RIGHT CONTROL PCB ASSY) 11
POWER PCB ASSY & CIRCUIT DIAGRAM 12
MIDI PCB ASSY 12
CIRCUIT DIAGRAM (MIDI PCB ASSY) 13
RIGHT CONTACT PCB ASSY w/RUBBER CONTACT & CIRCUIT DIAGRAM 14
LEFT CONTACT PCB ASSY w/RUBBER CONTACT & CIRCUIT DIAGRAM 14
TEST MODE 15/20
PARTS LIST 20/21
TRANSLATION FROM ENGLISH INTO JAPANESE 22/27
S P E C I F I C AT I O N S
A - 7 0 / A - 7 0 E X : E x p a n d a b l e c o n t r o l l e r
A - 7 0 E X S o u n d S e c t i o n ( V E - R D 1 )
- S o u n d G e n e r a t o r P C M s y n t h e s i s
- P a r t s 4 P a r t s
- M a x i m u m P o l y p h o n y 6 4 Vo i c e s .
- E f f e c t s R e v e r b
C h o r u s
E q u a l i z e r
- P r e s e t M e m o r y P a t c h e s : 1 2 8
A - 7 0 / A - 7 0 E X C o m m o n
- K e y b o a r d 7 6 K e y s
- Z o n e s I n t e r n a l : 4
E x t e r n a l : 4
- I n t e r n a l M e m o r y S y s t e m S e t u p : 1
U s e r N a m e M a p s : 4
P r e s e t N a m e M a p s : 9
P e r f o r m a n c e s : 6 4
C h a i n s : 1 0
M a n u a l : 1
- D i s p l a y 3 C h a r a c t e r s ( b a c k l i t L C D )
1 7 C h a r a c t e r s , 2 L i n e s ( b a c k l i t L C D )
. - N o m i n a l O u t p u t L e v e l O u t p u t : - 7 d B m .
- O u t p u t I m p e d a n c e O u t p u t : 1 6 0 0 O h m .
- R e c o m m e n d e d L o a d I m p e d a n c e O u t p u t : 1 0 K o h m o r G r e a t e r
- C o n n e c t o r s M i d i C o n n e c t o r s ( i n : 2 , t h r u : 1 , o u t : 4 )
F o o t C o n t r o l l e r J a c k s : 1
S w i t c h J a c k s : 1
To t a l Vo l u m e P e d a l J a c k
H o l d P e d a l J a c k
O u t p u t J a c k s [ L ( M o n o ) , R ]
H e a d p h o n e J a c k
A C I n l e t ( A C 1 0 0 V, A C 2 3 0 V, A C 2 4 0 V )
- P o w e r S u p p l y A C 1 0 0 V, A C 11 7 V, A C 2 3 0 V o r A C 2 4 0 V
- P o w e r C o n s u m p t i o n 1 5 W ( A C 1 0 0 V ) , 1 7 W ( A C 11 7 V )
2 0 W ( A C 2 3 0 V ) , 2 0 W ( A C 2 4 0 V )
- D i m e n s i o n s 1 2 4 5 ( W ) X 3 5 7 ( D ) X 1 3 6 ( H ) m m
- We i g h t 1 6 K g
- A c c e s s o r i e s P e d a l S w i t c h : D P - 2 ( 7 7 1 0 6 1 0 0 0 0 )
O w n e r ’s M a n u a l ( E ) ( K 6 0 1 8 2 8 8 )
O w n e r ’s M a n u a l ( J ) ( K 6 0 1 8 2 9 1 )
M i d i G u i d e ( K 6 0 1 8 1 0 9 )
M i d i I m p l e m e n t a t i o n M a n u a l ( K 6 0 1 8 2 9 2 )
! MAINS CABLE H05VV+POL.SOCKET 230V (J3439150)
! CABLE 49B/35JT 2X18 AWG-C17 117V (J3439128)
! MAINS CABLE DC 545 J03 100V (13499108)
! CABLE BS/13/H05VV-F3G 0.75-V 230VE (13499152RI)
! CABLE SAA/3-OA3CCFC 3X0.75-V 240VA (13499150RI)
- O p t i o n s S t e r e o H e a d p h o n e : R H - 2 0 / 8 0 / 1 2 0 :
P e d a l S w i t c h : D P - 2 / 6 , B O S S F S 5 U
E x p r e s s i o n p e d a l : E V - 5
C o n n e c t i n g C a b l e : P J - 1 M , P C S - 1 0 0 P W
M I D I / S Y N C c a b l e : M S C - 1 5 / 2 5 / 5 0
Vo i c e E x p a n s i o n b o a r d : V E s e r i e s
Issued by RES
Copyright © 1997 by ROLAND CORPORATION
DISASSEMBLY
1 SN00018 K6018299 Printed in Italy (AF00) (AD)
First Edition