CD-BA250 (serv.man6). Part 3 - Schematic diagrams (22-30) - Sharp Audio Service Manual (repair manual). Page 9

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CD-BA250H/CD-BA2600H
– 30 –
A
B
C
D
E
F
G
H
1
2
3
4
5
6
• NOTES ON SCHEMATIC DIAGRAM can be found on page 39.
Figure 30 SCHEMATIC DIAGRAM (9/9)
34
32
26
31
33
30
28
27
29
35
25
24
23
22
FM SIGNAL 
AM SIGNAL 
MAIN PWB-A1(3/3)
AM ANT.
T351
AM IF
24
23
22
21
20
19
18
17
16
15
14
13
MO/ST
REG 
AM IF IN
GND 
SD
STEREO
FM DET
VCC 
IF OUT
PHASE 
PHASE
(FM/AM)
L-CH  OUT
R-CH  OUT
MPX  IN
MPX  VCO 
FM/AM OUT
VSM
AM LOW CUT
AM RF IN
AM OSC IN
FM AFC
AM OSC OUT
AM MIX OUT
FM IF IN
12
11
10
9
8
7
6
5
4
3
2
1
22
21
20
19
18
17
16
15
14
13
12
SD
VSS
AOUT
AIN
PD
VDD
FM IN
AM IN
X OUT
IF IN
11
10
9
8
7
6
5
4
3
2
1
CONT
IF   
FM/AM 
FM/AM 
ST IND
MO/ST 
DO
CL
DI
CE
X IN
8
7
6
5
4
3
2
1
F OUT
IF OUT
VCC
VT
GND
GND
GND
ANT
RDS_RDDA
RDS_RDCL
RDS_READY 
RDS_RST 
GND(A_GND)
TUN_SM
DI
DO
CE
TUN_R 
CLK 
TUN_L 
A+10 V 
GND(D_GND)
16 15
14 13 12
11 10
9
8
7
6
5
4
3
2
1
RDCL
RDDA
RST
MODE
VDDD
VSSd
VREF
XOUT
TEST
CIN
FLOUT
VDDA
MPXIN
XIN
VSSA
READY
RDS-ID/
1
2
2
1
AM LOOP
ANTENNA
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
ICT1
LC72723M
1
2
3
1
1
2
2
3
3
IC302 LC72131
Q360: SWITCHING
TO  MAIN  SECTION
P25  12-F
RT29
1K
RT30     1K
RT27
1K
RT28
1K
RT21
10K
CT24
47/16 
RT22
390
RT23
390
ZDT21
DZ5.1BSB
CT30      0.022
CT32
47/16
CT31
47/16
CT28
0.022 
CT26
560P
RT26
56K
RT24
56K
RT25
10K
CT29
0.022
QT21
KTC3199 GR
LT21
2.2
µ
H
CT22
0.022
XT21
4.332MHz
CT25
22P
(CH)
CT23
22P(CH)
CT21
47/16
ICT21
LC72723M
RDS DECORDER
CT27 0.022
LT22
2.2
µ
H
R372 1K
IC302
LC72131
PLL(TUNER)
R370    1K
C364      2.2/50
IC303
LA1832S
FM IF DET./FM MPX./AM IF
R365
10K
C345         0.022
S0302
FM ANTENNA
TERMINAL
Q301
2SC380 O
C321       100/16
R387  5.6K
C370
1/50
R393
1K
R376
1K
R355
3.3K
R359
1.8K
D304
DS1SS133
D303 
DS1SS133
C301
0.01
C384
0.001
FE301
FM FRONT END 
C369 27P C374 0.018
ZD351
DZ5.1BSB
C396      100/10
C395       0.022
R381
10K 
X352
4.5MHz
R363
47K
C363        0.022
R391
270
Q360
KTA1266 GR
R385
5.6K
R392        270
C372
1/50
R364
47K
CF302
CT1       0.01
CF301
R345       4.7K
C347         0.022
C355
22P
R388
3.9K
L341
BALUN
C332
0.022
C331
0.047
C340
0.001
C330
15P
C341
0.022
L342
2.2
µ
H
R369 15
C371
1/50
R378 1K
R386
22K
C388
0.001
R356
1K
C368
1/50
C398
100/10
C356
0.001
C357 2.2/50
C358 1/50
C338
0.001
D301           DS1SS133
D302          DS1SS133
CNP302
CF352
R352
1K
R346
330
R347
6.8K
C361
0.022
C362
3.3/50
VD301
KDV147B
R382
150
L354
LOW PASS
FILTER
C353       0.022
C399
0.022
C373
0.018
X351
456KHz
R344           470
C397
0.022
C382
15P(CH)
C366          0.001
R350
2.7K
R357
470K
R323
68K
R383
5.6K
C391
47/25
R384
5.6K
R395
47K
C386
330P
R360
4.7K
R377 47K
C334
22P(CH)
C335
560P
L351
100
µ
H
C385
0.01
C380
10/50
R379
2.2K
C323
0.022
C393
1/50
R380
1.5K
R373 1K
R374 1K
C387
0.022
C392
0.001
C394
47/16
C352       10/50
C350        0.022
R351         5.6K
R358
3.9K
C342
0.022
C365          0.022
C367
1/50
R353
270
CF351
C354        0.022
R348         680
R349
33
C381
12P(CH)
R336
10K
TP301
TP302
TP
T303
AM TRACKING
AM BAND
COVERAGE fL
T306
AM
OSC.

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