Yamaha SILENT Piano SG Series Service Manual page 63

1 2
<P.4>
SILENT SG SERIES OVERALL CIRCUIT DIAGRAM 2/2 (AM, MIDI, PANEL, DC-IN, KEY SENSOR)
A
B
EXMIDI
C
D
DEVICE
to DM_CN11
<P. 3/N-6>
E
F
not installed
G
H
12V
POWER SW
I
Power switch
POWER
(ON/OFF)
PS+REV
J
K
L
KEY SENSOR
OP AMP
M
N
Transistor
OP AMP
O
P
Q
SILENT SG SERIES
1 2
3 4 5
MIDI
AUX
AUX
IN/OUT
MIDI
OUT/IN
SYSTEM RESET
USB to DEVICE
WJ057600
to DM_CN7
<P. 3/K-10>
REGULATOR
MA
REGULATOR
(+5D)
to DM_CN1
<P. 3/B-8>
N.C
CPU (FLASH)
CPU1
Array
Transistor
Array
INVERTER
SYSTEM RESET
Photo Coupler
INVERTER
3 4 5
6 7
PANEL
PANEL
AM
AJK
(AUDIO)
OP AMP
OP AMP
AUX
AND
not installed
not installed
OP AMP
KSN05A-V858590
6 7
8 9
µ
PC37M32TJ-E1-AZ(X5914A00)
REGULATOR +3.3V/+2.5V
DM: IC005
1
2
3 4
5
1SS372 (V9424900)
DIODE ARRAY
DM: DA001–004
1
2
3
1 2
DTC123JKA (VY677600)
DIGITAL TRANSISTOR
DM: TR005, 006, 011
WJ057700
2
1
R1
OUT
IN
R2
GND
IN OUT
GND
OP AMP
VOLUME
DJK/EXMIDI
N.C
DJK
to DM_CN2
<P. 3/B-9>
CPU
DC-IN
DJK
(MIDI)
TRANSIENT
SUPPRESSOR
to DM_CN3
<P. 3/B-10>
PJK
(PDL)
PS+REV
or : Not installed（未実装）
（セ） ： Ceramic （セラミックコンデンサー）
Capacitor
： Electrolytic Capacitor （ケミカルコンデンサー）
金被 ： Metal Film Resistor （金属被膜抵抗）
酸金 ： Metal （酸化金属被膜抵抗）
Oxide Film Resistor
8 9
10 11 12
SILENT SG SERIES
NJM78M05DL1A(XS534A00) LM3525MX-H(X3119A00)
REGULATOR +5V USB POWER REGULATOR
DM: IC010 DM: IC026
2
6
1: INPUT 1
8 4
2: NC
3
3: GND 1
1: INPUT
4: OUTPUT1
2: GND
5: OUTPUT2
3: OUTPUT
6: GND(Fin)
EC10DS4-TE12L (VN681100) D1F60 (VS201100)
DIODE DIODE
DM: D0001–0003
DM: D0001–0003
3
1 1
1: ANODE1 2
2
2: CATHODE2
1: ANODE
1: ANODE
3: CATHODE1,
2: CATHODE
2: CATHODE
ANODE2
DTB123YK (VY677700) UMG5N (WC668500)
DIGITAL TRANSISTOR DIGITAL TRANSISTOR
DM: TR001–004, 007–010 DM: TA001–004
5
3
3 4
1
2
2
R1: 10k
3
1 R2: 47k
1: DTr1 IN
R1 OUT
3 2 1 2: GND
IN
1: GND 1: GND (+)
R2 3: DTr2 IN
R1
R1
2: IN 2: IN R2 R2
GND (+) 4: DTr2 OUT
IN OUT
3: OUT 3: OUT DTr2 DTr1
5: DTr1 OUT
GND (+)
4 5
B
PHONES
A
REVERB
PANEL
WJ057300
DC JACK
DC IN 12V
SNS
PDL
DAMPER pedal
（ダンパーペダル）
MAX MIN
WH 1
RE 2
GR 3
PDL
YE 1
BE 2
SOFT pedal
（ソフトペダル）
WJ057400
WARNING
Components having special characteristics are marked s
and must be replaced with parts having specification equal
to those originally installed.
安全上の注意
s印の部品は、安全を維持するために重要な部品です。
交換する場合は、安全のため必ず指定の部品をご使用ください。
Note: See parts list for details of circuit board component parts.
注：シート部品詳細は、パーツリストをご参照ください。
SILENT SG SERIES
10 11 12
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q