Yamaha CD-S2000 Service Manual page 42

A B C
CD-S2000
DIGITAL 2/3
1
2
DIGITAL (2)
3
CB800
4
Page 43 H4
to DIGITAL (5)_CB902
5
6
7
8
9
10
# All voltages are measured with a 10MΩ/V DC electronic voltmeter.
# Components having special characteristics are marked s and must be replaced
with parts having specifications equal to those originally installed.
# Schematic diagram is subject to change without notice.
42
D E F
0.6 0.8
5.3
30.3 5.0
30.3
0.6
0.8
0
Key detection for AD port
Key INPUT (A/D) pull-up resistance 10 k-ohms
Ohm + 820
V 0 – 0.3
KEY0 (93 pin) STOP
KEY1 (94 pin) PLAY
KEY2 (95 pin) PURE DIRECT
G H I
CB802
W801
SAN-PH
+ 3.3 k + 12.0 k
0.6 – 1.0 1.6 – 2.0
PAUSE OPEN/CLOSE
SEARCH+/SKIP+ SEARCH-/SKIP-
SA-CD/CD –
DIGITAL (3)
IC802: TC7SH08F
2-input AND gate
IN B 1 5
V CC
A B Y
L L L
IN A
2
L H L
H L L
GND OUT Y
3 4
H H H
J K L
W803A W803B
5.0 5.0
0.1
3.3 3.6
3.3
0 0
0 0 0
3.3
IC802
3.3
3.3
3.3
0
M N
1.9
0.1
DIGITAL (4)