Sharp CD-PC671H Service Manual page 20

CD-PC671H/651H
SO301
ANTENNA
TERMINAL
FE301
8
FM FRONT END
2 6 7 3
AM LOOP ANT
L341
BALUN
AM RF
AM ANT
T302
FROM CD SECTION
CNP11
L-CH
TAPE 1
R-CH
PB HEAD
REC
P.B
L-CH
TAPE 2
R-CH
REC PB HEAD
AC BIAS
ERASE
HEAD
FM IF
AMP
FM IF FM IF
1 CF301 Q301 CF302
FM IF IN
5
4
VR351
FM MUTE LEVEL
FMOSC
AM OSC
T306
20
+B4
Q360
7
FM
VOLTAGE
REGULATOR
23 22 21 20
ICT21
LC72720
RDS DECORDER
2 4 3
CNS11
1
2
3
PLAYBACK AND RECORD
/PLAYBACK AMP.
L(T1)
1
R(T1) 24
L(T2)
2
R(T2)
23
SWITCHING L NF
3
R NF 4
Q103~Q106
POP REDUCE 6
L REC 9
R REC
16
14
REF
12
SWITCHING
Q107
Q108
Q109
BIAS
OCS
Q128
L104
Figure 20 BLOCK DIAGRAM (2/3)
+B4
+B4
AM IF
T351
1 2 3 4 5 8 9 17
OUT REG IN GND VCC
IC303
LA1832
IF
FM/AM IF MPX.
AM OSC OUT
24 23 22 21 7 13 6 10
Q361
MPX
PHASE
VOLTAGE
REGURATER
+B4
X352
4.5MHz
1 22
15 16 11 10 13 12 17
IC302
OSC
LC72131
PLL (TUNER)
3 4 5 6
21
Q371
15 14 13
12
JK401
VIDEO IN
L
R
L
R
IC101
AN7345K
13 +B4
P.B.
4 PB
L
21
R
5
20
H/N
T1/T2
7 L REC
REC 18
R
L NF
8
17
R NF
ALC
10
NOR/
T1/T2
HIGH
15 19
SWITCHING
Q111
Q110
SWITCHING
SWITCHING
Q124
– 20 –
FOOL PROOF
SM
SOLENOID
AMP.
QT21
19 20 18 16
FM/AM MPX
OUT
IN
11 14 15
12
L R
MUTING
MPX Q353
VCO Q354
CUT
TUNER MUTE
+5V
23 24 25 56
L
VIDEO2 51
R 61
VIDEO1
L 52
IC401
R 60
LC75396N
TAPE 53
L
AUDIO PROCESSOR
R
59
TUNER L 54
R
58
CD L 55
R
57
9
63 49 33
Q121
Q122
MUTING
L
R
44 45 33 48
34
IC501
38
LV1035M 22
35
DOLBY PRO LOGIC
9
37
DECORD
36
33 32
X501
BAIS
Q126
SWM3
SWM4
F.A.S
SOLM1
M
SWM5
CAM
MM1
TAPE MOTO
PC671H
ONLY
VOLUME
JOB
VR702
+B4
20
28
17 R
L
31
30
18
48
REC
ZD80
T1/T2
13
9
IC951
LA4551
BAIS
POWER