Service manual

– 19 –
CD-K491W
Figure 19 BLOCK DIAGRAM (3/5)
9
7
12
13
5
DEM0
DEM1
XT1
BICK
LRCK
6
PD
16
20
22
2
14
15
24
8
18
17
+B12
1 3
10
11
21
A-GND
D3-GND
CENTER
SUB
WOOFER
CENTER
SUB
WOOFER
54
80
9
7
12
13
5
DEM0
DEM1
XT1
BICK
LRCK
6
PD
16
20
22
2
14
15
24
8
FL/FR
18
17
FL
FR
+B12
1
3
10
11
21
A-GND
D3-GND
89
87
82
34
3
SS SO RESET SCK SI
9
1
CLK2L/R
OUT
92
CLK2OUT
97
95
66
CLK2L/R
CLK
SCK
SCK2IN
5
55
59
67
70
81
84
93
+B13
6
12
17
30
35
45
48
90
78
94
86
85
62
6
0
2
8
19
29
37
44
53
65
68
71
D3-GND
CENTER
SUB
WOOFER
OUT
IN
IN
OUT
FL/FR OUT
ICA18
ZR38600
DOLBY AC-3 /5.1
MPEG2 AUDIO
DECORDER
SUB
WOOFER
OUT
FL/FR
OUT
CENTER
OUT
SS SO SCK SI DEMO1 DEMO0
AC3 RESET
SUB
WOOFER
ON/OFF
AD RESET
4
8
SUB
WOOFER
IN
4
5
6
12
13
QA03
11
10
A-GND
7
14
QA01
QA02
–B12
+B12
8
1
9
2
5
7
–B12
+B7
ICA21
NJM4580M
–15dB AMP
SUB
WOOFER
OUT
SUB
WOOFER
ON/OFF
SWITCHING
FL/FR
VOLTAGE
REGURATER
VOLTAGE
REGURATER
+B7
+B12
–B6–B12
VOLTAGE
REGURATER
UN-SWITCHED
+B9
+B13
QB01
ICA19
AK4321
D/A
CONVERTER
ICA20
AK4321
D/A
CONVERTER
GND
VDD
4
8
+B7
–B12
3
5
1
7
IN
MIX
L
R
OUT
ICB01
NJM4580M
MIX AMP
SUB
WOOFER
ICA22
BU4066BCE
SWITCH
TO MAIN SECTION
TO MAIN SECTION