Yamaha YDO-323 Service Manual page 74

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YDP-323 OVERALL CIRCUIT DIAGRAM 1/2 (DJACK, DM, PANEL, PEDAL)
1
DM
2
3
CPU
Internal CLK 33.8688M
Detection Voltage
SYSTEM
RESET
4
not installed
5
6
7
to MAEQ-CN4
8
9
REGULATOR
+3.3V / +2.5V
10
11
12
YDP-323
A B C
D E F G
MASK ROM 64M
PROG./WAVE 1
INVERTER
not installed
CPU
Internal CLK 33.8688M
not installed
BUFFER
DAC
REGULATOR +5V
D E F G
H I J
FLASH ROM 4M DRAM 4M
OR
not installed
MASK ROM 64M
PROG./WAVE 2
not installed
to MAEQ-CN2
AND
OP AMP
Details of &&&.
R80 R81 R92 R93 C96 C98 C149 C81 R74
No 0Ω 4.7k 4.7k 10/16 No 0.01u No No
No: not installed
H I J
K L M N
not installed
KEY MATRIX
SW [0] SW [1]
PANEL: SW1 PANEL: SW2
+5D
DEMO/SONG PIANO/VOICE
LED MATRIX
LD [0] LD [1]
PANEL: LD1 PANEL: LD2
+5D
REC PLAY
DJACK
CPU
Boot Mode when SW1 is ON.
to GHD EBUS L-CN1
not installed
28CC1-8834455 7
: Not installed
: Ceramic Capacitor
Note : See parts list for details of circuit board component parts.
K L M N
O P Q
YDP-323
1
PANEL
2
SW [2] SW [3] SW [4] SW [5]
PANEL: SW3 PANEL: SW4 PANEL: SW5 PANEL: SW6 3
SELECT REC PLAY METRONOME
28CC1-8834937 1
PHOTO COUPLER
4
not installed
5
28CC1-8835084
6
PEDAL
CN1
NC
DAMPER pedal
SOSTENUTO pedal
SOFT pedal
7
NJM78M05DL1A(X0673A00) DTC123JKA (VY677600)
REGULATOR +5V DIGITAL TRANSISTOR
DM: IC10 DM : TR5
8
3
2
1: GND
2
2: IN
1
1 3: OUT
R1 OUT
3 IN
1: INPUT
R2
2: GND
GND
IN OUT
3: OUTPUT
GND
µPC37M32TJ-E1-AZ(X5914A00)
UMG5N (WC668500)
REGULATOR +3.3V/+2.5V DIGITAL TRANSISTOR
DM: IC5 DM : TA1
5
6 4
1
1 2 9
2
R1: 10kΩ 3
3 4 1: DTr1 IN
1: INPUT R2: 47kΩ
5
2: NC 2: GND
3 2 1
3: GND 3: DTr2 IN
R1 R1
4: OUTPUT1 R2 R2 4: DTr2 OUT
5: OUTPUT2 5: DTr1 OUT
DTr2 DTr1
6: GND(Fin)
4 5
EC10DS4-TE12L (VN681100) 1SS133,1SS176,HSS104
DIODE (VD631600)
DM: D1-3 DIODE
DJACK: D1–7
1
1
2
2
1: ANODE
10
2: CATHODE
1: ANODE
2: CATHODE
D1F60 (VS201100)
DIODE
DM: D1-3
1
2
1: ANODE
2: CATHODE
11
12
YDP-323
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