Sharp CD-BA250H Service Manual page 20

CD-BA250H/CD-BA2600H
SO302
FM
ANTENNA
8
AM LOOP
ANTENNA
L341
BALUN
T303
LC72723
RDS DECODER
16 15 14 13 11 10 9
4.332 MHz
2 4 3 8
CNS601
FROM CD SECTION
CNP7
L-CH
TAPE 1
R-CH
PB HEAD
SWITCHING
REC
P.B.
Q101~
L-CH
Q104
TAPE 2
R-CH
REC PB HEAD
AC BIAS
POP REDUCE
SWITCHING
SWITCHING
BIAS Q111
ERASE
OSC
HEAD
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FE301
1 CF301
TA7358AP
FM FRONT END
5
2 6 7 3 4
AM TRACKING
AM BAND
T306
COVERAGE
ICT21
+B
FM
XT21
SWITCHING
1
2
IC101
3
AN7345K
PLAYBACK AND RECORD
/PLAYBACK AMP.
+B4
L(T1)
1
13
R(T1)
24 P.B
4
L
L(T2) 2
21 R
R(T2)
23
5
L NF 3
22 20
R NF
H/N
T1/T2
L
6 7
R
18
REC
L REC
9
16
8 L NF
R REC
17
R NF
REF 14
NOR/
12 10 ALC
HIGH T1/T2
15 19
SWITCHING
Q105
Q114
Q106
Q112 Q113
SWITCHING
Q109
L103
Figure 20 BLOCK DIAGRAM (2/3)
Q301 CF303
450 kHz
T351 CF352
AM IF
1 2 4
IC303
AM MIX AM IF
LA1832S GND
FM IF DET./
FM/AM
FM/AM IF MPX.
FM MPX/ OUT
AM IF 23 22 21 24 7 18
QT21 AMP.
X352
VT
4.5 MHz
20 14 22 15 16
11
OSC
IC302
LC72131
PLL(TUNER)
+B4
7 9 10
MO/ST
FM/AM
FM
Q360
JK690
VIDEO/AUX IN
L
9
L
R
R
16
L
10
TAPE
15
R
L
11
TUNER AUDIO PROCESSOR
14
R
L
12
CD
13
R
7
PB
REC
BIAS
Q110
– 20 –
10.7 MHz
CF351
X351
456 kHz
5 9 8 17 13
FM MO/ST
FM+B
VCO
DET
L 14
R
15
FM/AM
MPXIN
16 12
L354
LOW PASS
FILTER
3 4 5 6
17
21
+B4
23
DI 1
CE 2
CLK 24
IC601
–20 dB
ATT
LC75341 21 R
Q603
L Q604
4
Q612
Q613
8 17 18 3
Q107
Q108
+B4
MUTING
8
1
4
7
IC561
IC562
KIA4558P
OPE AMP.
+B4
REC/PLAY
IC7
IX040
(2
T1/T2
BIAS