1
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
A
B
C
D
E
F
G
H
I
J
K
L
A
B
C
D
E
F
G
H
I
J
K
L
PSR-280/PSR282
PSR-280/PSR-282 OVERALL CIRCUIT DIAGRAM 1/2 ( DM, AM, PN(VR, PW) )
PSR-280/PSR282
PSR-280/PSR282
to MKS3-CN1
DM
AM
1/2
AM
2/2
PN (VR)
MASTER
VOLUME
to PN(PNR)-CN701
to LCD-CN1
SUSTAIN
IN
MIDI
OUT
EPROM 8M PROGRAM
ROM 32M PROGRAM/WAVE
SRAM 1M
SRAM 1M
SWX00B
REG3.3V
RESET
PHOTO COUPLER
DAC
OP AMP
OP AMP
OP AMP
OP AMP
OP AMP
OP AMP
OP AMP
POWER AMP 17W
REG5V
REG5V
REG5V
to BATTERY
PHONES/OUTPUT
to SPEAKER-R
to SPEAKER-L
to LCD
DC IN 10-12V
PQ05RA1(XL450A00)
REG5V
2: OUT
1: IN
3: GND
4: ON/OFcont.
4
3
2
1
REG5V
S-81250SGY-Z (XT625A00)
2
1
3
3: OUTPUT
2: INPUT
1: GND
REG3.3V
µPC29M33HF (XT333A00)
1
2
3
3: OUTPUT
2: COMMON
1: INPUT
20E1-FC4 (VL723600)
DIODE
1
2
1: ANODE
2: CATHODE
: Mylar Capacitor
: Ceramic Capacitor
: Semiconductive Cera Cap
: Metal Oxide Film Resistor
See parts list for details of circuit board
component parts.
Note :
PN (PW)
STAND-BY ON
28CC1-8816889
28CC1-8816890
28CC1-8816892
28CC1-8816892
28CC1-8816890
