Table of Contents
– AC-3 (RF) SECTION –
AC-3
J901
BUFFER
L.P.F.
BUFFER
RF
3
1
Q902
IC902
INPUT
IC902
6
7
BUFFER
Q904
IC904
3
1
MUTE SW
Q901
• Signal path
:RF (AC-3)
09
FILTER
FL902
IC906
9
8
1
6
Q903
4
9
COMPARATOR
IC903
IC906
13
10
+
COMPARATOR
7
2
L.P.F.
IC905
5
+
7
-
6
AMP
IC904
RV901
NO ADJUSTMENT
X901
18.432MHz
11 - 13•15 - 19
I/O0
– 19 –
DIGITAL SIGNAL PROCESSOR
(AC-3 RF DEMODULATOR)
IC901
DIN
ERROR
82
DEMODULATION
S/P
CORRECTOR
XIN
DIGITAL
4
PLL
X902
46.08MHz
PDO
PHASE
57
COMPARATOR
V1
1
4
55
DIVIDER
INVERTER
X LOCK
IC906
MUTI
78
DB0 - DB8
A0
35 41
51 - 43
21 - 24•26•27•30•31•37•38•42•39•33•34
DATA - BUS DB0 - DB8
ADDRESS - BUS A0 - A14
10 - 3•25•24•21•23•2•26•1
27 22
27 22
A0
A14
I/O7
S RAM
IC907
DAOUT
DAI
DIGITAL
65
DAO
CONTROL
OUT
DIVIDER
CPU
RESET
8
AC. RST
INTERFACE
MUTO
59
MUTO
ADDRESS
GENERATOR
A14
11 - 13•15 - 19
10 - 3•25•24•21•23•2•26•1
A0
A14
I/O0
I/O7
S RAM
IC908
– 20 –
SDP-EP70/EP90ES
C
D/A
SECTION
(Page 17)
G
CONTROL
SECTION
(Page 23)
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