18
18
CDC-X237/X437
3-3. BLOCK DIAGRAM — MAIN SECTION —
(Page 17)
(Page 19)
1
16
AMANT
J101
(ANTENNA)
2 FMANT
TUN-RCH
LCH
17
RCH
22
SD/ST
TU101
(TUNER UNIT)
AUX-RCH
15
64
12
13
SYSTEM CONTROL
IC901
ELECTRONIC VOLUME
IC401
LROUT
20
EVOL CE
EVOL CLD
6
32
EVOL DO
40
A MUTE
43
POWER MUTE
LSELO
LIN
L IND
75 FMOSC
74 AMOSC
78 EO1
16 IF REQ
70 IF(FM/AM)
14 ST/SD
LOC/DX
XIN
RESET
4 ST-BY
22 MUTE
RL
FL
11
POWER AMP
IC501
2
CNP801
R-CH
FL+
10
FL-
RL+
RL-
3
11
RR+
RR-
4
12
FR+
FR-
+B
7 ACC
+B
R-CH
BATT
PON+B
F901
6 ANT-R
17
19
18
16 BATT
42
STBY MUTE
44
BEEP
65
P.H MUTE
61
ACC DET
39
CD ON
66
16 AUX IN
L
J401
R
AUX(L)
TUN(L)
17
CD(L)
9
7
12
1
9
5
3
MUTE
Q402
AUDIO OUT
REAR
MUTE
Q401
4
LFOUT
DI
CE
CL
5
1
2
36
15
11
AM/FM OSC
6
FMVT
14
AMVT
20
IF REQ/OUT
3
AM DX/LOC
4
FM DX/LOC
14
X901
4.5kHz
S901
(RESET)
1
CD INSIDE
62
LM SW
33
SW1
52
SW2
51
FEM+LM+
35
FEM-LM-
36
CD RES
49
RW
37
RWC
48
WRQ
47
SQOUT
11
DRF
46
COIN
12
CQCK
13
LP UP
CD INSIDE
LM SW
8V(CD)
CD R
CD+8V
CD-RCH
CD L
SW1
SW2
FEM+
FEM-
CD RES
RW
RWC
WRQ
SQOUT
DRF
COIN
CQCK
LP UP
38
80 XOUT
55
LCD DI
8
LCD DO
10
LCD CE
41
POWER CONT
45
DFP IN
7
LCD DI
54
R ENCOD1
9
LCD CLO
53
R ENCOD2
56
REMOTE IN
LCD DO
LCD CE
DFP IN
LCD DI
RE 1
LCD CLO
RE 2
REMOTE
69
1
BATT IN
2
IN
CD+8V
OUT
BATT
BATT
COM+9V
SW+8V REG
Q831-833
BATT DET
IC941
COM+9V
LAMP+B
PON+B
BATT
SW+14V REG
Q801
POWER CONTROL
SWITCHING
Q802
COM+9V REG
Q821
BU+5V
BATT
+5V REG
Q811
LEVEL AMP
Q451
VOL/
TONE
FADER
LPF(AM)
Q101,102
FM+B
FM+B
SWITCHING
Q106
COM+9V
AM+B
AM+B
SWITCHING
Q105
LOCAL
SWITCHING
Q109
BATT
SHUTDOWN
MUTE
Q591,592
MUTE
CONTROL
Q441,442
13 TEL MUTE
RL(+)
RL(-)
FL(+)
FL(-)
J601
AUX
R906
CDC-X237:AEP,UK MODEL,
CDC-X437
FRONT
SECTION
B
CD
SECTION
A
58
FM
59
AM
• Signal path
: CD
: FM
: AM
: AUX
• R-ch is omitted due to same as L-ch.
