Sharp CD-BA250H Service Manual page 20

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