Bose CD-20 - Page 58

58
CD MECHANISM IC BLOCK DIAGRAMS
Control
Logic
XDEC
C Prom
32 X 32
2
YDCC
Data Register
D out
ACX
Start
Stop
Logic
H.V. Generation
Timining
and Control
Word
Address
Counter
(8) Vcc ----
(4) Vss-----
(5) SDA
(6) SCL
Start Cycle
32
Load
INC
R/W
_
PIN
CK
8
32
5
2
Dout
IC 602 (X204C01SI)
28
27
26
25
24
23
22
21
20 19
18
17
16
15
1
2
3
4
5
6
7
8
9 10
11
12
13
14
+
_
LEVEL
SHIFT
LEVEL
SHIFT
_
+
LEVEL
SHIFT
_
+
LEVEL
SHIFT
_
+
_
+
+
_
+
_
+
_
+
_
_
+
_
+
IC 861 (BA6398FP) CD Driver and +5V Regulator