Yamaha Portatone PSR-1000 Service Manual page 18

A B C
PSR-1000/PSR-2000 OVERALL CIRCUIT DIAGRAM ( DM 2/2, PN1, PN2, PN3, PN4, ENC, PB1, PB2, MOD )
1
PSR-1000
DM 2/2
2
DRAM 4M
3
4
PSR-2000
5
(IC700-2p)
DM 2/2
(IC700-26p, IC800-18p)
to DM 1/2 : O-6; P-6
(PSR-2000)
6
SWP30B
7
(IC308-12p)
(IC911-11p)
(IC911-14p)
8
9
10
(IC308-11p)
(IC911-14p)
(IC911-11p)
VOP3
11
12
PSR-1000/PSR-2000
A B C
D E F G
SWX00B
IC802: not installed
(IC911-12p)
MASKROM 64M WAVE-L
IC404: not installed
MASKROM 64M WAVE-H
IC405: not installed
DRAM 4M
DRAM 4M
D E F G
H I J
ENC
28CC1-8820770
MASK ROM 64M WAVE
PN1
to DM-CN600
DATA BUS
to DM 1/2 : O-6; P-6
(PSR-1000)
ADDRESS BUS
28CC1-8819917
6
to DM-CN100
to AM-CN107
(PSR-2000)
PSR-2000 only
PN2
to PB2-CN16 (PSR-1000)
PB1-CN15 (PSR-2000)
to MOD-CN14
(PSR-2000)
PN3
28CC1-8819917
6
H I J
K L M
RSR-2000 only
RSR-2000
only
PN4
28CC1-8820770
28CC1-8820770
: Ceramic Capacitor
Note:
K L M
N O P Q
PSR-1000/PSR-2000
RSR-2000 only
28CC1-8820770
28CC1-8820770
PSR-1000
PB2
to PN3-CN10
(PSR-1000)
PICH BEND
28CC1-8820770
PSR-2000 PSR-2000 only
PB1 MOD
to PN3-CN10 to PN3-CN11
(PSR-2000) (PSR-2000)
PICH BEND MODULATION
28CC1-8820770 28CC1-8820770
See parts list for details of circuit board
component parts.
PSR-1000/PSR-2000
N O P
Q
1
2
3
4
5
6
7
8
9
10
11
12