Sharp CD-BK250W - Page 18

CD-BK250W/CD-BK2600W/CD-BK270W
– 18 –
Figure 18 BLOCK DIAGRAM (2/3)
AM
ANTENNA
SO302
FM
ANTENNA
CNP301
JK1
MIC
1
2
IC101
AN7345K
PLAYBACK AND RECORD
/PLAYBACK AMP.
AUX
R
L
R
L
JK690
VIDEO/AUX IN
FM
+B
+B4
CLK
+B
4
AM IF
OSC BUFF
FM IF
FM
OSC
B.P.F
CNS601
ATT
–20 dB
Q103-
Q104
–B2
+B4
IC561,IC
5
KIA455
8
OPE A
M
IC562
IC561
Q107
Q108
Q601
Q602
10.7 MHz
450kHz
RE
C
CLK
CE
DI
DO DI CE
MO/ST
SWITCHING
+B4
FM/AM
IC302
LC72131
PLL(TUNER)
FM/AM OUT
L
R
MUTING
P.B.
REC
AC BIAS
L
LR
L
R
R
R
L
TAPE
TUNER
CD
PB
CNP7
FROM CD SECTION
HEAD
ERASE
SWITCHING
SWITCHING
SWITCHING
BIAS
Q113
Q114
Q112
Q110
SWITCHING
Q109
OSC
BIAS
Q111
L103
Q105
Q106
REC PB HEAD
TAPE 2
P.B. HEAD
TAPE 1
R-CH
L-CH
R-CH
L-CH
IC601
LC75341
AUDIO PROCESSOR
+B4
R
L
REC
R
L
L NF
R NF
ALC
REF
R REC
L REC
POP REDUCE
R NF
L NF
SWITCHING
L(T2)
R(T2)
R(T1)
L(T1)
R
L
FM/AM
MPXIN
STEREO
AM RF IN
AM OSC IN
FM
Q360
VT
OSC
X352
4.5 MHZ
AM BAND
COVERAGE
AM TRACKING
T303 T306
Q302
X351
456 kHz
MO/ST
VCO
FM
DET
FM+B
GND
AM IF
CF351
IC303
LA1832S
FM IF DET.
FM MPX./
AM IF MPX.
AM MIX
CF352
T351
RF
FM
OSC
FM
L312 T301
CF303T302
IC301
TA7358AP
FM FRONT END
BF301
21
7
8
4
1
22
3
4
24
2
1
18 178
3
9
10
18
11
16
3
15
10
9
7
23
14
12
13
1
2
20
19
7
18
10
8
17
13
21
4
5
2
24
23
6
9
16
14
12
15
1
5413
8
4
3
2
1
21
7
98517
6
21
21
20 22 11
17
1615
9
6
5
7
13
14
12
15
1623
4
7
H/N
P.B
REC
T1/T2
T1/T2
NOR/
HIGH
L
R
ICK1
M65856SP
MIC AMP.
ICK2
KIA4558P
OPE AMP.
LATCH
MIC IN
VRK1
MIC
VOLUME
CLK
DATA
LOUT
ROUT
L IN
R IN
VCC
+B5
+B4
9
8
7
5
6
2
3
1
12
13
22
23
QK1
32
31
35
36
42
41
40