Service manual

CD-CH1500H/CD-CH1500W
– 18 –
Figure 18 BLOCK DIAGRAM (3/6)
FM
AM
ERAS
E
HEAD
L-C
H
R-C
H
VSSD
VDDD
XIN
XOUT
VSSA
VDDA
MPX
IN
DO
CL
DI
CE
XT21
4.332MHz
ICT21
LC72722
RDS DECORDER
X351 456kHz
FM IF CF351
+B
+B
+B
+B
QT21
AMP.
FM +B
VT
T306
T302
L341
BALUN
CF302
DO
CE
CL
DI
CF301
FE301
FM FRONT END
Q360
RL
MPX
IN
FM/AM
OUT
IF IN
IF OUT
SD
FM MONO/ST
MONO/ST
AM RF IN
AFC
IN
OUT
AM OSC
REG INOUT VCC
FM IF IN
FM IF
AMP
Q301
FM IF
FM
X352
4.5MHz
OSC
STEREO
IC302
LC72131
PLL (TUNER)
AM
IN
FM IN
FMOSC
T351
AM IF
GND
OSC
FM
FM IF
AM BAND
COVERAGE
VOLTAGE
REGULATOR
AM
TRACKING
AM RF
AM LOOP
ANTENNA
SO301
FM ANTENNA
TERMINAL
Q371
Q351
17 19 20 18 16
141211101321222324
20 22
21
13
12
1415
2021222324
15 16 11 10 13 12
67
1
3
2 4 3
4 5 6
8
9
7
15
8
2 6 7
3 4
5
1
1 2 3 4 5 8 9
L354
L.P.F
CF352
VR351
FM MUTE
LEVEL
7
FOR CD-CH1500H
X351 456kHz
FM IF CF351
+B
+B
+B
+B
+B
FM +B
VT
T306
T302
CF302
DO
CE
CL
DI
IC301
FM FRONT END
Q360
RL
MPX
IN
FM/AM
OUT
IF IN
IC303
LA1832S
FM IF DET./FM IF MPX./AM IF
IF OUT
SD
FM MONO/ST
MONO/ST
AM RF IN
AFC
IN
OUT
AM OSC
REG INOUT VCC
FM IF IN
FM IF
FM
X352
4.5MHz
OSC
STEREO
IC302
LC72131
PLL (TUNER)
AM
IN
FM IN
FMOSC
OSC BUFF
T351
AM IF
GND
OSC
FM
AM BAND
COVERAGE
VOLTAGE
REGULATOR
AM
TRACKING
AM RF
Q371
Q351
17 19 20 18 16
141211101321222324
20 22
21
15 16 11 10 13 12
67
1
3 4 5 6
8
9
7
15
1
2 3 4 5
7 8
9
6
1 2 3 4 5 8 9
CF352
T312
FM IF
BF301
B.P.F
L312 T311
VR351
FM MUTE
LEVEL
FOR CD-CH1500W
FM RF
Q302
+B
SWITCHING
SWITCHING
CNP303
1
2
3
FM/AM
LOOP
ANTENNA
RE
C
PLA
Y
H
E
SWITCHING
SWITCHING