Yamaha DISKLAVIER MX1Z Service Manual page 39

A B
MX1Z OVERALL CIRCUIT DIAGRAM 3/3 ( HAMMER SENSOR, HAMMER EMISSION, KEY RECEIVER, KEY EMISSION )
1
KEY EMISSION
2
3
4
VZ141900
HAMMER EMISSION
5
6
VN571700
7
8
9
MX1Z BLOCK DIAGRAM
10
Control Unit
11
LED 7 SEG
LCD module
Panel
12
Switches
PANEL
SWITCH
REMOTER
CONTROLLER
RECEIVER
13
POWER
SWITCH
ROTALY
ENCODER
14
15
16
17
MX1Z
A B
C D E
HAMMER SENSOR
COMPARATOR
EMK-CTL
DECODER
IC401
16M
24
8M
FDC FLASH FLASH DRAM
FDD
ROM ROM 4Mbits
CS
8Mbits 8Mbits
x16 x16 x16
IC107 IC106 IC104
IC202
DATA BUS
ADDRESS BUS
MP
Back-light
D-FF BUFFER
CS CS
IC504 IC505
PLAY
+12V
–12V
+5V
RES
L
R
LED
10
DB
8M
6
1M
Power
Switch
IC503
7
6
REMOTE
IC407 CONTROLLER
(DECODER) IC502
IC408
13
RELAY
SPEAKER
P.SW P.ON
RY RY
CB5
+100V
Noise
Filter +8V
+20V
CB1
CB6
PS circuit
PWB (Power Supply Unit)
CB6
MAINS Switch
C D E
F G
INVERTER
9, 15, 13
CS
CN101
74, 75
CS
MINI
16MHz
D-Sub
CPU MIDI
CPU 22
CONNECTOR
for Inter-
8M
HD6417032
SCI faces
-F20
&
16M
IC302
PIO
79
IC304
IC103 IC306 CN301
MINI-DIN
8PIN
TO
HOST
IC305
RES
SW301
RESET
REGULATOR
IC102 MAC
+5V
IC109
HOST
PC2
SELECT
PC1
MIDI
1MHz
CN106 CN107 CN104 CN103 CN302
CN1
CN7 CN8 CN5 CN3 CN2
OUT
MIDI
IN
RELAY
IC3, 4
CN6
RY1
RELAY
MONO
CNTROL
TR2
OUT PUT
RY2 POWER AMP
R
RELAY Low
0.5W Pass
CONTROL
TR3 Filter
IC2
CTRL SUB A
CNP PS1
GND +5V
2 Loud PEDAL
1
+5V 3 Sensor
SENSOR
6
Soft
7
Sensor
5
PS2
Ref voltage (+5V)
+100V
Loud
CN1
TR1
Solenoid
PROTECT
Sig
Soft
TR2 Solenoid
Mute
Lock Solenoid
TR3
PEDAL
DRIVE
THERMO
100°C
CN5
CN6
THERMOSTAT
Pedal Drive Unit
F G
H I
INVERTER
RESET
CPU
PHOTO
COUPLER
to PK-CTL
-CN2
VT186900
Note:
PK-CTL
6 66
28
PLAY DATA RXD0
P.C.
62 RES
RXD1
CN1 1, 2
IC1
SENS DATA 7
P.C. P77
CN2 3, 4 PS RAM
SOFT-LOUD
CPU 256K
CN5 P50~62
+8V REGULATOR
+5V
CN3 IC2
IC5
IC3
CN2
29
Protect
4MHz
CN6
Thermostat
P61, 65, 74,
CN4
83, 87
W. D. T
IC8
REC
55 26 42
Drive
CN1 58 THRMO PROTO F1
IC7
GATE ARRAY
29
RES
CMD P- ON P50-P57 F2
Drive
CN2 54 39
43
CN3
16MHz
Q1 CN4, 6
DRIVE C
PROTECT
+100
PWM
Signal 4MHz CN101
Key No 1~12
CN201 PWM IC1
YM3421-F
DRIVE B
CN117 Key No 13~24
CN101
DRIVE A
CN35
CN37
PROTECT Signal
CMD
P .C. RXD0
ARRAY
IC8 TXD0
IC5, 6
GATA
K0
RES Reset
SENS
Drive ARRAY
CPU
RES
IC3
IC4 K7
IC20, Q1 20MHz 1MHz
+5V
1 11
C*
+20V
CN2 OCTR17
C
OCTR10
M10 – M17
HAMMER SENSOR
H I
J K L
KEY RECEIVER
COMPARATOR
VN244500
See parts list for details of circuit board component parts.
CTRL IN
EMI
FIL
3
7
FOOT
CN1 4
CONTROLLER
2
1
26
RES
MASK ROM EEP ROM
4M 64K
IC4 IC6
RES CN8
49 RESET
IC9
DATA BUS
CN37
IC1
PWM
YM3421-F
CN37
Key No 25~56 IC1
PWM
YM3421-F
TA 1~ 8
TR
ARRAY
Key No 57~88
DRIVE A
+100
CN35
CN37
Thermostat
Key Drive
Key Senser Unit
TR
shutter
C* PD8
CN3
K0
K7
CN1
C PD1
KEY EMISSON KEY RECIEVE
CN1
Hummer Sensor
C* C
Voc1
CN1
CN2
CN2
C*
Vss
Vcc
COMPARATOR
C
(+20v)
IC1, 2
HAMMER EMISSION
Hammer Sensor Unit
J K L
MX1Z
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
MX1Z