Sharp CD-BA250 Service Manual page 28

CD-BA250/CD-BA2600
A
MAIN PWB-A1(3/3)
FM SIGNAL
AM SIGNAL
B
C
D
E
F
+B
A+10V
30
GND(A_GND)
24
TUN_SM
22
TUN_R
27
TUN_L
29
DI
26
CE
24
DO
23
CLK
25
GND(D_GND)
31
G
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 37.
1
C314
0.0047
C315
0.0047
C316
0.022
C317
0.001
R327
33
Q302
KTC3194 Y
+B
C384
C382
C381
0.001
15P(CH)
12P(CH)
X352
R375
4.5MHz
470
X OUT
1 22
X IN
VSS
21
2
AOUT 20
R374 1K
C393
3 CE
1/50
R373 1K
4 DI
R372 1K
5 CL
19
AIN
R378 1K
6 DO PD 18
VDD
R379
7 17
FM/AM
2.2K
IF
FM IN 16
8
CONT
15
AM IN
C385
9
FM/AM
14
0.01
MO/ST SD
10 13
IF IN
12
11 ST IND
R386 R376
C386
22K 1K
330P
R395
47K
R360
4.7K
+B
R359
1.8K
R384
5.6K
R385
5.6K
C388
0.001
C391
47/25
+B
2
Figure 28 SCHEMATIC DIAGRAM (9/9)
C301
0.01
D305
DS1SS133
C308 4.7P(CH)
L312 FM RF
C309
R311
R314
0.001
100K
22
VD302
R313
C310
SVC211C
33K
15P(CH)
R325
T301 FM OSC.
47K
C318
100P
1
C313
2
22P
3
(CH) R309
CF303
10K
TP301
+B
R382
150
C397
C350 0.022
0.022
C352 10/50
R381
10K
C389 0.022
T351
C394
AM IF
47/25
R380
C392
1.5K
C380
0.001
10/50
2
C387
0.022
CF352
L351
100 H
C353 0.022
R377
47K
IC302
C354 0.022
R393
LC72131 1K
CF351
PLL(TUNER)
C399
0.022
C356
C398
0.001
100/10
R387
5.6K
C355
22P
R388
3.9K
C370
1/50
FM IF DET./FM MPX./AM IF
R391
270
3 4
– 28 –
AM
ANTENNA
FM
ANTENNA
3 2 1
CNP301
3 2 1
BF301
BAND PASS FILTER
1
C303
2
10P(CH)
3
C304
1
0.01 CT1
0.01
2
3
4
C305
5
4.7P
IC301
(CH) 6
7
8
R302
9
10
IC301
TA7358AP
C334
C335
22P
FM FRONT
560P
(SL)
END
C306
R323
0.022
68K
VD301
C307
SVC348S
10/50
R336
10K
R358
R351 5.6K
3.9K
AM OSC OUT
1 24
FM IF IN
AM OSC IN
23
2 AM MIX OUT
C362
22
FM AFC
REG C361
3
AM RF IN
21
C363 0.022
C364 4.7/50
1 R352
VSM
20
1K AM IF IN
3
C365 0.022
19
4 AM LOW CUT
C366 0.001
FM/AM OUT
18
5 GND
R350
6
SD 2.7K
C367
1/50
STEREO
7
FM DET
8
X351
456kHz
C368
MPX VCO
17
9 VCC 1/50
16
MPX IN
C357
IF OUT R356
10
2.2/50
1K
PHASE
11
C374
C369
15
R-CH OUT
27P
R355
14
L-CH OUT
3.3K
PHASE C372
12 C371
MO/ST
13
1/50
(FM/AM)
C358 1/50
1/50
R361
IC303 R362
10K
10K
LA1832S
5
T306
AM
OSC.
C330
15P
C342
0.022
R365
10K
3.3/50
0.022
TP302
TP
R357
470K
0.015
C373
0.015
R364
6.8K
R363
6.8K
6