Yamaha Silent Cello SVC210 Instrukcja serwisowa - Strona 11

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Yamaha Silent Cello SVC210 Instrukcja serwisowa
I
LSI PIN DESCRIPTION （LSI端子機能表）
• YSS234 (XN299A00) Digital Sound Processor
PIN
NAME
I/O
No.
1
MD4
I/O
2
MD3
I/O
3
MD0
I/O
External RAM interface data
4
MD1
I/O
5
MD2
I/O
Master clock output
6
MCKO
O
Crystal oscillator connection
7
XO
O
8
XI
I
Crystal oscillator connection
9
ER0
I
10
ER1
I
Eary refrection preset select
11
ER2
I
12
REV0
I
13
REV1
I
Effect select
14
REV2
I
15
MUTEN
I
Mute
16
ICN
I
Initial clear
17
PRG
I
Program select
18
MODE
I
Preset mode (H=DC +5V)
19
VSS
-
Ground
20
AVSS
-
Ground (analog)
ADC midpoint voltage
21
CVA
-
22
AORL
O
N.C.
23
AORR
O
N.C.
24
CHL
I
Sample hold capacitor connection
25
AIL
I
Lch ADC input
26
VDD
-
DC D+5V
27
AIR
I
Rch ADC input
Sample hold capacitor connection
28
CHR
I
Lch DAC output
29
AOFL
O
30
AOFR
O
Rch DAC output
31
AVDD
-
DC A+5V
32
CVB
I
Rch midpoint voltage
I
IC BLOCK DIAGRAM （IC ブロック図）
• NJM2737V (X7718A00)
Dual operational amplifier
MA: IC14
Output 1
1
8
V+
Output 2
-Input 1
2
7
-
+
+Input 1
-Input 2
3
6
+
-
+Input 2
V-
4
5
• R1210N501DTRF (X7464A00)
DC / DC converter
MA: IC3
FUNCTION
• NJM3404AV (XV410A00)
Dual operational amplifier
MA: IC8, IC9, IC10, IC11
Output A
1
Inverting
2
Input A
-
Non-Inverting
3
Input A
-DC Voltage Supply
4
-V
CE
Lx
1
5
V
2
Lx 5
OUT
NC
3
4
GND
PIN
NAME
I/O
No.
33
AVDD
-
DC A+5V
34
VDD
-
DC D+5V
35
TST0
-
Test
36
TST1
-
Test
37
DOEN
-
Test
38
SDO1
O
N.C.
39
SDO0
O
N.C.
40
WC
O
N.C.
41
BCO
O
N.C
42
MA0
O
43
MA1
O
44
MA2
O
45
MA3
O
46
MA4
O
47
MA5
O
External RAM interface address
48
MA6
O
49
MA7
O
50
MA12
O
51
MA14
O
52
VSS
-
Ground
53
MA10
O
54
MA011
O
55
MA09
O
External RAM interface address
56
MA8
O
57
MA13
O
58
VDD
-
DC D+5V
59
WEN
I
Write enable
60
OEN
I
Output enable
61
CEN
I
Chip select
62
MD7
I/O
63
MD6
I/O
External RAM interface data
64
MD5
I/O
+DC Voltage
+V
8
Supply
Output B
7
+
Inverting
6
+
-
Input B
Non-Inverting
5
Input B
V
limiter
LX
Buffer
PWM Controller
OSC
fosc Control
Chip Enable
1
CE
FUNCTION
• NJM3414AM (X5614A00)
Dual operational amplifier
MA: IC12
+DC Voltage
Output A
1
+V
8
Supply
Inverting
Output B
2
7
Input A
-
+
Non-Inverting
Inverting
3
6
+
-
Input A
Input B
Non-Inverting
GND
4
5
Input B
Vref Circuit
2
V
OUT
Phase Comp.
4 GND
SVC210
MA: IC1
11