Yamaha CDR-HD1500 Service Manual page 50

A B
CDR-HD1500
1
I SCHEMATIC DIAGRAM (WCLK)
2
3
4
5
9
11
13
5
6
7
50
C D
6
8
10
12
1 2 3 4
WCLK
# All voltage are measured with a 10MΩ/V DC electric volt meter.
# 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.
E F G
IC801: SN74LV393ANSR
Dual 4-Bit Binary Counters
CLR R
Q
Q A
CLK 1CLK
T
1CLR
R
Q
Q
B
T
R
Q
Q
C
T
R
Q
Q D
T
H I
IC802: TC74HCU04AFEL
Hex Inverters
1A 1 14 VCC
1 14 V
CC
2 13 1Y 2 6A
2CLK 13
3 12
1Q 2CLR 2A 3 12 6Y
A
4 11
1Q 2Q
B A 2Y 4 11 5A
5 10
1Q 2Q
C B
3A 5 10 5Y
6 9
1Q 2Q
D C
3Y 6 9 4A
7 8
GND 2Q
D
GND 7 8 4Y
PIN CONNECTION DIAGRAM OF TRANSISTORS,
DIODES AND ICS.
SN74LV393ANSR TC74HCU04AFEL
7
7
14
14
1
1
J