Service manual

– 23 –
CD-CH1500H/CD-CH1500W
Figure 23 SCHEMATIC DIAGRAM (2/14)
7
8 9 10 11 12
CD-CH1500W
1
3
2
1
2
3
MAIN PWB-A(1/3)
FM
AM
AM IF
FM OSC.
SWITCHING
AM TRACKING fL
AM BAND
COVERAGE fL
FM RF
TP301
C319
0.1
2
1
3
C370
1/50
R327
33
C317
0.001
C316
0.1
R354
3.9K
R389
3.9K
L352
100µH
R391
390
R393
1K
R377
47K
C395 0.022
C396
100/16
X351
456kHz
R359
1.8K
C367
1/50
C364
4.7/50
C363
0.022
C365
0.022
L353
1mH
C362
3.3/50
C350
0.047
C361
0.022
C342
0.022
IC303
LA1832S
FM IF DET./FM MPX./AM IF
R351
5.6K
C352
10/50
C351
0.022
R355
3.3K
C356 0.001
C357
2.2/50
C355
22P
(CH)
C399
0.022
R353
270
C354
0.022
C353
0.022
C366
0.001
R356
1K
C368
1/50
CF351
T351
C358
1/50
R352
1K
C343
33P
(CH)
C374
0.015
R358
8.2K
R363
1.2K
C373
0.015
R357
470K
Q351
KRC104M
R364
1.2K
C372
1/50
C371
1/50
R362 2.2K
R361
2.2K
R370
1K
CF352
CF302
C330
18P(CH)
R336
10K
C323
0.022
C332
0.022
C331
0.047
T306
C335
330P(CH)
C337
0.022
VD301
SVC348S
R323
68K
C339
100P
(CH)
R325
47K
C318
100P(CH)
R322
270
C303
10P(CH)
BF301
D301
DS1SS133
D302
DS1SS133
C338
0.001
D304
DS1SS133
D303
DS1SS133
C327
0.1
T312
R311
100K
R313
33K
CNP303
C309
0.001
C324
4P(CH)
C326
18P(CH)
L312
C305
5P(CH)
C315
0.0047
R302
10
C314
0.0047
C304
0.01
D310
DS1SS133
R314
22
C313
22P
(CH)
IC301
TA7358AP
FM FRONT END
C325
15P(CH)
VD302
SVC211C
R309
10K
T311
D311 DS1SS133
D312 DS1SS133
C310
100P
(CH)
C311
100P(CH)
C312
100P
(CH)
C384
0.001
R372
1K
R373
1K
R374
1K
D305
DS1SS133
D306
DS1SS133
R399
10K
C389
0.001
R392
390
DZ351
DZ5.1BSB
C320
0.047
R383
5.6K
Q371
KTA1266 GR
Q360
2SB562 C
R384
5.6K
R371
4.7K
C391
47/16
R385
5.6K
D352
DS1SS133
IC302
C390
0.001
L351
100µH
C394
47/16
C387
0.022
R380
1.5K
R379
2.2K
C385
0.01
C392
0.001
C393
1/50
R381
10K
R345
4.7K
C321
100/16
R376
1K
C386
330P
(CH)
C341
0.1
C346
0.022
L342
2.2µH
X352
4.5MHz
C381
12P(CH)
C382
15P(CH)
R378
82K
C397
0.022
R360
4.7K
R382
150
R395
47K
C347
0.022
C301
0.001
C345
0.022
C334
18P(CH)
BAND
PASS
FILTER
VD303
SVC211C
Q302
KTC3194 Y
R369
820
C308
5P(CH)
C380
10/50
FM
MUTE
LEVEL
VR351
10K(B)
R350
2.7K
C398
100/16
IC302
LC72131
PLL(TUNER)
T302
C306
0.001
AM OSC.
0.8V
1.6V
3.6V
1.6V
0V
3.6V
2.9V
3.6V
3.6V
0.1V
1.8V
0.8V
2.3V
0V
0V
0V
4.7V
0.1V
3.5V
4.1V
3.6V
4.7V
0.8V
0.8V
4.7V
4.7V
2.3V
0V
0V
4.7V
4.7V
0V
9.2V
10V
10V
2V
4.6V
2V
2V
0V
4.7V
4.7V
2.5V
4.6V
3.9V
3.4V
3V
4.6V
2.4V
0.3V
0V
2.3V
2.1V
2V
1.2V
1.2V
3.6V
3.4V
0V
0V
2.3V
1.3V
2.1V
VT_CK
A_GND
TUN_R
VSM
TUN_L
A_+B
D_GND
C2B_CE
C2B_CL
C2B_DI
C2B_DO
3
2
1
1
2
3
9
8
7
6
5
4
3
2
1
24
23
22
21
20
19
17
16
15
14
1312
11
10
9
8
7
6
5
4
3
2
1
FM IF IN
AM MIX OUT
AM OSC OUT
FM AFC
AM OSC IN
AM RF IN
AM LOW
CUT
VSM
FM/AM
OUT
MPX VCO
MPX IN
R-CH OUT
L-CH OUT
PHASE
(FM/AM)
PHASE
IF OUT
VCC
FM DET
STEREO
SD
GND
AM IF IN
REG
MO/ST
3
2
1
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
NC
MUTE
IO2
IF IN
X OUT
X IN
CE
DI
CL
DO
AM IN
FM IN
VDD
PD
AIN
AOUT
VSS
FM
MW
MO/ST
ST IND
NC
C2B_CL
C2B_DI
C2B_CE
C2B_DO
FM/AM
LOOP
ANTENNA
18
E
F
G
H
I
J
K
L
M
N
P30 4 - A
TO AUDIO SECTION
AM SIGNAL
FM SIGNAL
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
FM BAND
COVERAGE fL
AM ANT.
OSC BUFF
VOLTAGE
REGULATOR
SWITCHING
+B
+B
TP302
FM IF