Sharp CD-C472 Service Manual page 18

CD-C472/C3400/C3400C/C3800/C3800C
FM&AM LOOP ANT
FM BPF
IC301
FM FRONT END
BF301 1
TA7358AP
2 3 4 5
L302 FM RF
AM TRACKING
AM ANT.
FROM CD SECTION
TAPE 1
PB HEAD
L-CH
SWITCHING
R-CH
TAPE 2
REC/PB
REC
HEAD
P.B
L-CH
R-CH
AC BIAS
ERASE
HEAD
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FM IF
6 T301 CF301
9
7 8
L303 FM OSC
Q302
OSC BUFF
AM BAND
COVERAGE
T302
PLAYBACK&RECORD/
PLAYBACK AMP.
IC101
AN7345K
L (T1)
1 13 +B4
P.B.
R (T1)
24
L 4 L
L (T2)
Q103 2
R
21 R
R (T2) 23
Q106
L NF 3 5
4
R NF 20
POP REDUCE
H/N L
6 T1/T2 REC
7
REC
18
L REC 9 R
16
R REC
8 L NF
17 R NF
ALC
REF 14 10
NOR/
HIGH T1/T2
12
15 19
SWITCHING
SWITCHING
Q107
Q111
Q108
Q109 Q110
SWITCHING
BIAS
SWITCHING
OCS
Q128
Q124
L104
Figure 18 BLOCK DIAGRAM (2/3)
FM IF IN
1
FM OSC
VT
SWITCHING
FM +B
Q344
REC
Q121
Q122
MUTING
P.B
T1/T2
BIAS
BIAS
Q126
– 18 –
+B4 +B4
VR351
MPX VCO ADJ
AM IF
T351 T352
FM DET
3 5 6
21 20 13
AM IF GND FM+B FM DET VCO MO/ST
AM MIX
FM/AM IF
IC303
MPX IN
LA1805
DET OUT FM/AM
24 7
23 22 17 16
X352
4.5MHz
1 3 4 5 6
20 22 15 16 11
OSC IC302
LC72131
PLL CONTROLLER
7 10 21
FM
+B4
8
18 45 44
34 CL
IC501
38 CL
LV1035M
DATA
35
DOLBY PRO LOGIC
DECORDER
37 DATA
36
ENABLE
42 33 21
15
L
9
10
R
11
FM/AM
SWITCHING
Q343
VOLTAGE
REGURATER
+B
17
ST FM
J501
VIDEO/AUX
L
A
R
TAP
TU
CD
23 24
31 32
X501