Yamaha SILENT Piano SD Series Service Manual page 51

1 2
<Page 4>
SILENT SD SERIES OVERALL CIRCUIT DIAGRAM 2/2 (AM, DC-IN, KEY SENSOR)
A
AM
B
AJK
(AUDIO)
to DM-CN7
<Page 3 K-10>
C
D
12V
E
SW
Power switch
POWER
(ON/OFF)
F
PS+REV
G
not installed
H
DC-IN
12V
I
DJK
(MIDI)
to DM-CN2
<Page 3 B-9>
J
PJK
(PDL)
to DM-CN3
K <Page 3 B-10>
PS+REV
L
KEY SENSOR
M
N
O
P
Q
SILENT SD SERIES
1 2
3 4 5
Z: MUTE (DEFAULT)
GND: ON
H: ON
L: MUTE
TEST MODE
REGULATOR +10V
DC-DC CONVERTER
MA (+5D)
to DM-CN1
<Page 3 B-8>
REVERB
TEST MODE
Photo Coupler
WH12610
OP AMP
Transistor
Array
OP AMP
3 4 5
6 7
OPERATIONAL
POWER AMP
VOLUME
DC IN 12V
KEY
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）
N.C
CPU (FLASH)
CPU1
Transistor
Array
INVERTER
SYSTEM RESET
Photo Coupler
INVERTER
6 7
8 9 10
B
PHONES
A
MIDI INPUT/
OUTPUT
WARNING
Components having special characteristics are
marked and must be replaced with parts having
specification equal to those originally installed.
安全上の注意
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。
or : Not installed（未実装）
: Ceramic Capacitor（セラミックコンデンサー）
: Metal Oxide Film Resistor（酸化金属被膜抵抗）
: MetalFilmResistor（金属被膜抵抗）
not installed
not installed
OP AMP
KSN05A-V858590
8 9 10
11 12
SILENT SD SERIES
A
B
C
D
E
F
G
WH12600 H
µPC2910T-E1-AZ (X7408A00)
LM2596SX-5.0 (X3564A00)
REGULATOR +10V DC-DC CONVERTER
AM: IC201 AM: IC203
Metal
Tab
GND
4
I
1
2
1
2
3
4
3
1: INPUT 5
1: V
IN
2: GND 2: OUTPUT
3: GROUND
3: OUTPUT
4: FEEDBACK
4: GND (Fin)
5: ON/OFF
EC10DS4-TE12L (VN681100) RB050L-40 (VU445900)
DIODE DIODE
AM: D205 AM: D202
1 1
2 2
J
1: ANODE 1: ANODE
2: CATHODE 2: CATHODE
RLS-73 TE-11 (VV925900) 2SC2412K(VV556400)
DIODE TRANSISTOR
DC-IN: D101–107 AM: TR201
KEY SENSOR: D0080 DC-IN: TR101, 102
KEY SENSOR: Q0080
3
1
2
2 1
3
2
1: EMITTER
1: ANODE
2: BASE
2: CATHODE
3: COLLECTOR
1
2SJ278MYTR-E (VZ427900)
K
FET
KEY SENSOR: FT001, 002
4
1
2
3
1: GATE
2: DRAIN
3: SOURCE
4: DRAIN
L
M
N
O
P
Q
SILENT SD SERIES
11 12