CD73
COMPACT DISC PLAYER
- 22 -
1
2
3
4
5
6
7
8
-
+
-
+
Inverting Input 1
Output 1
Non-inverting Input 1
VDD
VCC
Output 2
Inverting Input 2
Non-inverting Input 2
MAIN BOARD
U301: TS972ID
MAIN BOARD
U401: WM8740E
1
1A
14 VAC
2
1Y
13 6A
3
2A
12 6Y
4
2Y
11 5A
5
3A
10 5Y
6
3Y
9
4A
7
GND
8
4Y
MAIN BOARD
U402, U406, U407: 74HCU04
1
CH1OUTF
28 GND
2
F
INTER
FACE
REV
FWD
R
CH1OUTR
27 CH4OUTF
3
RCIN1
26 CH4OUTR
4
CH1RIN
25 VBIN
190K
100K
25K
25K
DRIVE
MUTE
5
CH1FIN
24 VSIN
6
VREFIN
23 VBIN
7
VREFOUT
22 VCC
8
GND
21 VCC
9
CH2FIN
20 CH3FIN
10
CH2RIN
19 CH3RIN
11
RCIN2
18 RCIN3
12
CH2OUTR
17 CH3OUTR
13
CH2OUTF
16 CH3OUTF
14
GND
15 MUTE
+
-
+
-
THERMAL
SHUTDOWN
CIRCUIT
F
INTER
FACE
REV
FWD
R
F
INTER
FACE REV
FWD
R
LEVEL
SHIFT
MAIN BOARD
U202: BA6392FP