Service manual
– 33 –
CD-K491W
7
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Figure 33 SCHEMATIC DIAGRAM (12/20)
RT03
22
RT10
4.7K
RT08
10K
CT15
0.022
RT04
47
C309
330P
C310
0.001
R311
100K
L311
560µH
Q361
KRC107 M
Q365
KRC107 M
C343
15P (CH)
CT13
3.9P(UJ)
C390
100P
R396
1K
R398 1K
R397
1K
VDT02
KDV147B
C397
0.022
CF352
AM IF
T351
R352
1K
R371 1K
R372 1K
R373 1K
R374 1K
C338
0.001
C301
0.001
C349
1/50
C321
0.0039
D317
1SS135
R326
1K
C380
1/50
R302
82
R390
82K
C383
0.0022
R316
22K
D316
1SS135
LT02
SW2 OSC
T308
MW OSC T306
TT01
T302
T303
SW1 ANT
T304
SW2 ANT
D353
1SS133
X351
456kHz
C365 0.022
C363 0.022
C364 10/16
C355
22P
Q354
KTC3199 GR
MUTING
MUTING
Q353
KTC3199 GR
10K
R365
R367
1K
C375
3.3/50
R368
33K
R357
470K
R356
1K
C368
1/50
R350
2.7K
C367
1/50
C366 0.001
C398
100/10
C399
0.022
270
R353
C354
0.022
C353
0.022
C307
0.047
TC302
C308 (UJ)
8.2P
TC303
Q308
2SC2878 B
Q309
2SC2878 B
R314
3.3K
R312
33K
VD302-B
KV1236Z23F
D309
1SS135
D310
1SS133
D311
1SS135
R315
22K
R313
22K
C311
0.022
D315
1SS135
D314
1SS133
D313
1SS133
D308
1SS135
D307 1SS135
D306
1SS135
D305
1SS135
CT03
4.7P
RT06
10
CT04
0.001
VDT01
KDV147B
1DT01
SS133
ICT01 TA7358AP
CT16
10/16
LT01
CT02
0.01
CT01
18P(CH)
FM BAND PASS
BFT01
D302
1SS133
D301
1SS133
0.047
C305
C304
0.022
C303
0.022
C314
0.022
R317
10K
R330
1K
R325
56K
C320
0.0018
R329
100K
C319
0.022
VD302-A
KV1236Z23F
R328
10K
C318
0.022
R322
5.6K
C316
0.1
R320
10K
R318
1.5K
R324
100K
R319
100K
C331
0.047
VD301-1
KV1236Z23F
C342
0.022
VR351
10K(B)
C350
0.022
IC303
LA1832
FM IF DET./FM MPX./AM IF
C373
0.022
C374
0.022
R361
5.6K
R362
5.6K
C371
1/50
C372
1/50
R359
1.8K
R382
150
R381
10K
R380
1.5K
R379
2.2K
IC302
LC72131
PLL CONTROLLER
X352
4.5MHz
D352 1SS133
R366
10K
D304
1SS133
D303
1SS133
C394
47/16
C393
2.2/50
R321
5.6K
1SS133
D312
C315
0.1
VD301-2
KV1236Z23F
C336
470P
R323
68K
R327
5.6K
Q307
2SC2878 B
TC304
Q306
2SC2878 B
TC305
R384
5.6K
R383
5.6K
L351
100µH
C385
0.01
R393 1K
C370
1/50
L352
100µH
R391
390
R392
390
ZD351
MTZJ4.7B
C396
100/10
C395
0.022
R377
47K
C392
0.001
C387
0.022
R376
1K
R360
4.7K
C391
47/16
Q360
KTA1266 GR
R385
5.6K
ZD352
MTZJ3.9B
R387
22K
D351
1SS133
RT09
820
C381
12P (CH)
C382
15P (CH)
L356
1mH
R395
47K
C386
330P
R341
47K
Q364
KRA107 M
Q362
KRA107 M
Q363
KRA107 M
R342
47K
R343
47K
C312
0.022
C313
0.022
C351
0.022
R351
5.6K
2.06V
0V
0V
0V
0V
0V
0V
0V
0V
0V
12.18V
0V
0V
0V
0V
5.01V
2.07V
2.06V
0V
0.65V
0.65V
11.6V 12.18V
11.37V
0V
0V
0V
0V
2.52V
2.52V
0V
0V
0V
4.82V
5.1V
0.16V
12.1V
3.85V
3.95V
5.1V
2.38V
0V
0V
0V
2.48V
5.11V
0.9V
0.9V
2.1V
0V
5.09V
5.09V
2.84V
5.01V
3.68V
3.85V
3.85V
3.95V
1.18V
1.19V
2.05V
2.29V
2.52V
0V
0.46V
2.2V
2.2V
5.01V
3.48V
C352
10/16
L353
1mH
R358
8.2K
C362
3.3/50
C361
0.022
L357
4.7mH
L358
560µH
C360
0.022
CF302
10.7MHz
FM1F
R310
22K
C335
18P (CH)
R340
220
R339
470
R338
470
C356
0.001
R354
4.7K
C357
2.2/50
R355
3.3K
C358
1/50
RT02
33K
RT01
100K
QT01
2SC535 C
AMP
RT07
680
RT05
47K
CT10
0.022
CT09
0.0047
CT08 0.0047
CT07 0.001
CT06 0.022
1
98
7
6
5
4321321
11
121314151617202122 1819
10
98
7
6
5
4321
11
10
98
7
6
5
432
131415161718192021222324
12
11
10
9
8
7
6
5
4321
CNP303
R363
1.5K
R364
1.5K
CT12
33P
IF IN
STEREO
MO/ST
SW2
AM IN
FM IN
VDD
PD
AIN
CE
DI
CL
DO
FM
MW
SW1
MO/ST
L-CH
OUT
R-CH
OUT
MPX IN
MPX VCO
FM/AM OUT
AM LOW CUT
VSM
AM RF IN
FM AFC
AM OSC IN
AM OSC OUT
FM IF IN
AM IF IN
AM MIX OUT
REG
GND
SD
STEREO
FM DET
VCC
IF OUT
PHASE
PHASE
(FM/AM)
RF
MIX
B.A
OSC
VCC
NC
NC
FM FRONTEND
SW1 OSC
T307
MW ANT
TP 302
SW2+B
SW1+B
MW+B
AOUT
VSS
X IN
X OUT
CT14
22P(CH)
CT11
15P
(CH)
CT05
6.8P
(UJ)
GND(D)
CL
DO
CE
DI
+12V(A)
GND(A)
TUNER MUTE
L-CH
R-CH
SD
+B
+B
FROM MAIN PWB
P24 1-E
CNSF13
fH
fL
fL
fH
fL
fL
fH
fH
+B
3
2
1
+B
FMIF
3
2
1
3
2
1
3
2
1
FM MUTE
LEVEL
MW TRACKING
AMIF
CF351
FMIF
FM
75ohms
SW2
TRACKING
SW1
TRACKING
SW1
TRACKING
SW1 BAND
COVERAGE
MW BAND
COVERAGE
TUNER PWB-E
FM BAND
COVERAGE
FM
OSC
FM SIGNAL MW/SW1/SW2 SIGNAL
SW1
SW2
MW
GND
SO301
ANTENNA
TERMINAL
FILTER
FMRF
FMIF
+B
3
2
1
3
2
1
3
2
1
C334
18P
(UJ)
C330
8.2P
(UJ)
C306
10P (UJ)