Sharp CD-BA250 Service Manual page 28

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