Sharp CD-BA250H Service Manual page 30
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CD-BA250H/CD-BA2600H
A
FE301
FM FRONT END
ANT
GND
GND
VCC
F OUT
GND
B
IF OUT
C
D
+B
E
A+10 V
34
GND(A_GND)
32
TUN_SM
26
TUN_R
31
TUN_L
33
DI
30
CE
28
DO
27
F
CLK
29
GND(D_GND)
35
RDS_RST
25
RDS_RDDA
24
RDS_RDCL
23
RDS_READY
22
G
MAIN PWB-A1(3/3)
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 39.
1
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S0302
FM ANTENNA
TERMINAL
C301
0.01
8
7
CT1
0.01
6
R369 15
+B
5
C321
100/16
L342
C345
0.022
2.2µH
R345
4.7K
VT
4
3
2
C347
0.022
C341
0.022
R344
470
1
1
2
R346
CF301
330
3
R347
R348
680
6.8K
R349
33
Q301
2SC380 O
+B
+B
C384
0.001
C381
C382
12P(CH)
15P(CH)
X352
4.5MHz
IC302
1
22
X IN
X OUT
LC72131
VSS
21
2
PLL(TUNER)
AOUT
20
R374 1K
C393
3
CE
1/50
R373 1K
4
DI
R372 1K
5
CL
R379
19
AIN
R378 1K
2.2K
6
18
DO
PD
7
FM/AM
VDD
17
16
FM IN
IF
8
CONT
15
AM IN
9
C385
FM/AM
14
0.01
10
MO/ST
SD
13
12
IF IN
11
ST IND
C386
R376
R386
330P
1K
22K
R360
4.7K
+B
R359
1.8K
+B
Q360
KTA1266 GR
R384
R385
5.6K
5.6K
C391
R391
47/25
R383
+B
5.6K
+B
Q360: SWITCHING
R370
1K
FM SIGNAL
AM SIGNAL
2
3
Figure 30 SCHEMATIC DIAGRAM (9/9)
AM BAND
COVERAGE fL
TP301
CF302
1
2
3
+B
R382
150
C397
R351
0.022
C352
10/50
R381
10K
1
FM IF IN
C394
C350
0.022
47/16
AM OSC IN
R380
2
AM MIX OUT
1.5K
C392
3
REG
0.001
T351
C380
AM IF
10/50
C387
1
R352
0.022
2
1K
3
4
AM IF IN
CF352
L351
FM/AM OUT
100µH
5
GND
C353
0.022
R377 47K
R393
6
SD
1K
C354
0.022
7
STEREO
CF351
8
FM DET
R353
270
C399
0.022
MPX VCO
9
VCC
C356
C398
0.001
100/10
10
IF OUT
R387 5.6K
11
PHASE
R388
3.9K
C355
R-CH OUT
22P
R355
L-CH OUT
3.3K
PHASE
12
C370
(FM/AM)
1/50
IC303
LA1832S
FM IF DET./FM MPX./AM IF
270
RT21
10K
RT30
1K
ZDT21
RT27
DZ5.1BSB
1K
LT21
2.2µH
CT24
16 15 14 13 12 11 10
47/16
RT22
390
1
2
3
4
5
CT26
+B
560P
RT23
LT22
390
2.2µH
CT31
47/16
4
– 30 –
AM LOOP
ANTENNA
2
1
2 1
CNP302
C338
L341
0.001
BALUN
C323
0.022
T306
AM
OSC.
C335
560P
C334
22P(CH)
R323
68K
C330
15P
VD301
KDV147B
R336
10K
C342
0.022
5.6K
R358
3.9K
R365
10K
AM OSC OUT
24
C362
3.3/50
23
C361
22
FM AFC
0.022
21
AM RF IN
C363
0.022
C364
2.2/50
VSM
20
C365
0.022
AM LOW CUT
19
C366
0.001
18
R350
2.7K
C367
1/50
L354
LOW PASS
FILTER
X351
456KHz
17
TP302
16
MPX IN
R356
R357
C368
1K
470K
1/50
C369 27P C374 0.018
15
C373
14
0.018
C372
C371
MO/ST
13
1/50
1/50
R364
47K
R363
47K
CT21
47/16
ICT21
LC72723M
CT22
RDS DECORDER
0.022
CT23
22P(CH)
9
6
7
8
CT25
22P
(CH)
RT25
RT24
10K
56K
CT29
0.022
RT26
56K
5
6
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