Ymz702-D (Xr632A00) Ksn2 (Key Scanner); Digital-To-Analog Converter; Ic Block Diagram （Ic ブロック図 - Yamaha P-120 Service Manual

P-120/P-120S
G

YMZ702-D (XR632A00) KSN2 (Key Scanner)

PIN
NAME I/O
NO.
1 BK5 O
2 BK4 O
3 BK3 O
Key block (open drein)
4 BK2 O
5 BK1 O
6 BK0 O
7 MK15 I
8 MK14 I
9 MK13 I
First make contact
10
MK12 I
11 MK11 I
12 MK10 I
13 MK05 I
14 MK04 I
15 MK03 I
Second make contact
16
MK02 I
17 MK01 I
18 MK00 I
19 XIN I Crystal osc. input (4 MHz)
20 XOUT O Crystal osc. output (4 MHz)
I IC BLOCK DIAGRAM（IC ブロック図）
TC74HC138AFEL
3 to 8 Demultiplexer
DM: IC006
1
A
A
Select 2 B
Y0
B
3
C Y1
C
4
G2A Y2
G2A
Enable
5
G2B Y3
G2B
6
G1 Y4
G1
Output 7
Y7 Y5
Y7
Y6
8
GND
TC7S00F
(XG150A00)
NAND
DM: IC026
IN B 1
IN A 2
GND 3
16
FUNCTION
TD62083F-TP1
(XW762A00)
8ch Driver Array
DM: IC004
16
Vcc
15
YO
14
Y1
13
Y2
Output
12
Y3
11
Y4
10
Y5
9
Y6
PCM69AU-3/TE2

DIGITAL-TO-ANALOG CONVERTER

DM: IC10
5 Vcc
4
Y
SRVCAP
PIN
NAME I/O
NO.
21 GND
22 VDD
23 SO O
24 ACK I
25 XCK I
26 /IC I
27 TST1 I
28 TST2 I
XCKINH
29 I
30 BK14 O
31 BK13 O
32 BK12 O
33 BK11 O
34 BK10 O
BK9
35 O
36 BK8 O
37 BK7 O
38 BK6 O
39 GND
40 VDD
XN153A00
( )
I1
1 18 O1
I2 2 17 O2
I3 3 16 O3
O4
I4 4 15
I5 5 14 O5
O6
I6 6 13
O7
I7 7 12
I8 8 11
O8
GND 9 10
COMMON
(XV297A00)
1 20
+V DCOM
A
2 19
LV MC2
COM
3 18
NC RDATA
4 17
LI BTCK
OUT
5 16
SYSCK
6 15
REFCAP WDCK
7 14
RI LDATA
OUT
8 13
NC MC3
9 12
RV MC1
COM
10 11
+V
ACOM
D
GHDcl SW L KSN2
FUNCTION
Ground
Power supply
Serial data
Acknowledge/mode select
Clock for serial data
Initial clear
Test mode
(L,L: normal mode, others: test)
Inhibit of serial clock
Key block (open drein)
Ground
Power supply
TC7S04F
(XM182A00)
SC7SU04FEL
(XI348A00)
lnverter Gate
DJACK: IC001
NC 1
IN 2
VSS 3
TC7S32F
(XM588A00)
OR
DM: IC025
IN A 1
IN B 2
Vss 3
5 VDD
4 OUT
4 Vcc
5 OUT