Sw (X0189C0); Vr (X0189C0) - Yamaha Portatone PSR 1000 Service Manual

A B C
PSR-1000/PSR-2000 OVERALL CIRCUIT DIAGRAM ( AM, VR, HP, SW, MKS5F, MK-L, MK-H )
1
PSR-2000 only
2
LINE MIC
MIC/LINE IN
3
INPUT VOLUME
to DM-CN700
4
VR
MASTER
VOLUME
28CC1-8820769
11
5
OP AMP
SW
OP AMP
Power Supply
STANDBY/ON
28CC1-8820769
11
6
DC IN
REGULATOR +12V
to DM-CN105
7
HOST SELECT
MIDI PC2 PC1 MAC
8
to DM-CN109
9
10
11
AM
12
PSR-1000/PSR-2000
A B C
D E F G
to PN1-CN6
Red Green
LED DRIVER
OP AMP
OP AMP
EQUALIZER
OP AMP
EQUALIZER
Signal ground wire
Photo Coupler
INVERTER
LINE TRANSCEIVER
LCD CONTRAST
28CC1-8820769-002
D E F G
H I J
OP AMP
R
AUX OUT
(LEVEL FIXED)
L
OP AMP
R
OUTPUT
L/L+R
HP
POWER AMP 0.65W 2ch
28CC1-8820769
11
POWER AMP
7W 2ch
POWER AMP 17W
28CC1-8820769-001
11
IN
MIDI
OUT
MK-H
TO HOST
2
MK-L
FOOT PEDAL
1
(SWITCH)
to DM-CN501
2
H I J
K L M
SI-8050S(LF1111)
S3V20 (VR313500)
(X0548A00)
DIODE
DC-DC CONVERTER
2
1
1: ANODE
2: CATHODE
NJM7812FA(XJ608A00) AN7812F(XM169A00)
REGULATOR +12V REGULATOR +12V
3
2
1
1: OUTPUT
2: COMMON
3: INPUT
TO SERVICE PERSONNEL
Critical Components Information
Components having special characteristics are marked
and must be replaced with parts having specifications
equel to those originally installed.
Note: See parts list for details of circuit board
component parts.
PHONES
to DM-CN102
Tweeter
Woofer
K L M
N O P Q
PSR-1000/PSR-2000
NJM78L05UA(XJ598A00)
REGULATOR +5V
1
3
1
2
2 3
5
1: V in
4
2: SW OUT
3: GND 1: OUTPUT
2: COMMON
4: V os
5: S.S 3: INPUT
µPC2933T(XS516A00)
REGULATOR +3.3V
2
1
1
2
3 3
1: V in
1: INPUT
2: GND
2: COMMON
3: OUTPUT 3: V out
: Mylar Capacitor
!
: Ceramic Capacitor
: Semiconductive Cera Cap
MKS5F
CPU KBS
V7112200
VU648200
VU648100
PSR-1000/PSR-2000
N O P
Q
1
2
3
4
5
6
7
8
9
10
11
12