Adjustment - Sharp CD-C452 Service Manual

CD-C452/C452C
FM&AM LOOP ANT
FM BPF
IC301
FM FRONT END
BF301 1
TA7358AP
2 3 4 5
FM RF
L302
AM TRACKING
CNS11
6 1
FROM CD SECTION 5 2
CNP11
3 5
TAPE 1
PB HEAD
L-CH
SWITCHING
R-CH
Q103
TAPE 2
Q106
REC/PB
REC
HEAD
P.B
L-CH
R-CH
AC BIAS
Q107
Q108
BIAS
OCS
ERASE
HEAD
FM IF
6 T301
9
7 8
FM OSC
L303
Q302
OSC BUFF
AM BAND
COVERAGE
T302
AM ANT.
PLAYBACK&RECORD/
PLAYBACK AMP.
IC101
AN7345K
L (T1)
1 +B4
13
P.B.
R (T1)
24
P.B
L 4 L
L (T2)
2
R
21
R
R (T2)
23
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
Q111
Q109 Q110
SWITCHING
SWITCHING
Q128
Q124
L104
Figure 12 BLOCK DIAGRAM (2/3)
+B4
AM IF
CF301
T351
FM IF IN
1 3
AM MIX
24 23
FM OSC
VT
SWITCHING
FM +B
FM
Q344
Q121 REC
Q122
MUTING
T1/T2
BIAS
BIAS
Q126
– 12 –
+B4
VR351
MPX VCO ADJ
T352
FM DET
5 6
21 20 13 15
AM IF GND FM+B FM DET VCO MO/ST
FM/AM IF
L 9
IC303
10
R
MPX IN
LA1805
DET OUT FM/AM
22 7 17 16 11
FM/AM
SWITCHING
Q343
VOLTAGE
X352
REGURATER
4.5MHz
1 3 4 5 6
20 22 15 16 11
OSC
IC302
LC72131
17
PLL CONTROLLER
7
10 21
ST FM
JK601
VIDEO/AUX
L
R
+B4
8
18 45 44 23 24
CL
34
IC501
CL
38
LV1035M
DATA
35
DOLBY PRO LOGIC
DECORDER
DATA
37
36 ENABLE
42 33 21 31
X501
20 19 18 17 16
IC401
+B4 31 QS7777PF
Q-SOUND
6
MONO/ST
FM
+B4
23
L
AUX
52
60
R
TAPE L
53
59
R
TUNER L
54
R 58
CD L
55
57
R
4
LTIN
C-OUT
9
32
42
C-IN
FLIN
41
FRIN 40