Sharp CD-K491W Service Manual page 20

CD-K491W
FM BAND
PASS FILTER
SO301
ANTENNA
BFT01
TERMINAL
1 2 3
FM
GND
SW1
SW2
MW
T302 T306
MW ANT. MW OSC.
JR11
VCR/AUX1
L
R
R
L
JR12
+B2
VCR/AUX2
MOTOR
DRIVER
QL14
MM1
M
TAPE
DRIVER
MOTOR
QL12
DRIVER
VRM1
TAPE QL11
SPEED
PHM1
+B6
QL16
SWM3
REC FWD
SWM6
CAM SW
SWM5
T1 RUN2SW
SWM4
REC REV
SWM1
T1 CrO 2
SWM2
T2 CrO
2
QL15
SOLM1
QL19
SOLENOID
DRIVER
PB HEAD
L-CH
TAPE 1
R-CH
P.B
REC/PB
REC
REC/PB
HEAD
P.B
QK03 QK05
L-CH QK04 QK06
TAPE 2
QK17 QK18
R-CH
AC BIAS QK09
QK10
ERASE
HEAD
ICT01
TA7358AP
1 6
FM FRONT END
9
5 3 8
7
LT01 LT02
AMP
QT01
SW1/SW2 SW1/SW2
ANT. OSC.
T303 T307
T304 T308
Q308 Q306
Q309 Q307
TA MOT SW
QL18
HI SPEED
QL13
SWITCHING
TA MOT H/L
QL17
T22RUN
T2 FWD-REC
CAM SW
T1/T2 CrO
2
T2 REV-REC
T1 Cr0 2
T2 Cr0
2
T1/T2 SOLENOID
QK13
QK14
ICK01 AN7345K
PLAYBACK&RECORD AMP
L(T1)
1
P.B
P.B.
R(T1) 24
4 L
L(T2) 2
21
R
23
R(T2)
3 5
L NF
R NF
4 20
POP REDUCE T1/T2
6 H/N
L REC
7
REC
18
L REC 9 R
16
R REC L NF
8
QK07 17
R NF
REF 14
QK08
ALC
10
+B7 13
NOR/
T1/T2
12 HIGH
15 19
QK11
SWITCHING
SWITCHING
QK28
QK25
QK24
LK04
Cr0 2
QK31
QK32
BIAS OSC.
Figure 20 BLOCK DIAGRAM (4/5)
FM IF FM IF
TT01 CF302
AM IF
FM IF IN
1 2
OUT
VR351
FM MUTE LEVEL FM IF DET./FM MPX./AM IF
AM OSC
24 23 22
FMOSC
AM IN
X352
4.5MHz
+B7
1 22 15
FM
OSC
Q360 7
FM +B
PLL CONTROLLER
20
+B7
9
13
MW +B
Q362
+B7
+B7
SW1 +B
Q363
SW2 +B
Q364
QZ03
QZ04
10 9
TUNER L
12
1
R
TAPE L
14
R 5
L
13
3
R
VCR 1 L
15
2
R
VCR 2 L
11
R 4
ICZ08
7 16
TC4052BF
DUAL 4CH ANALOG
MULTIPLEXER
–B10
+B10
ICZ09
NJM4565M
LINE AMP.
PB-EQ
PB MUTE
–B10
QK17
QK18
MUTING
LEVEL SHIFT
REC MUTE
QK21
QK22
QK29
QK40
MUTING
SWITCHING
SWITCHING
QK30
HI SPEED
QK15
QK16
QK19
SWITCHING
T1/T2
REC/PB
SWITCHING
BAIS
QK26
BAIS
Cr0 2
QK27
BEAT CHANCEL
– 20 –
+B7
AM IF
CF352
T351
4 5 8 9 17 18
3
IN GND VCC OUT
REG
IC303
LA1832
IF OUT
21 7 13 10 12 14
L
Q361
VOLTAGE
REGURATER
+B7
+12V
16 11 10 12 17
IC302
LC72131
8
3 4 5 6
21
QG04
VOICE C
J602
MIC
MIC2
DET
MIC
1
IN
6
MIC2 IN
MIC SW
31
J602
MIC1
VR602
MIC2
VOLUME
R L
IN
3
5
4 8
+B10
1 7
OUT
R L
TO DOLBY SECTION
16
IN
SD
6
15
R
MUTING
Q353
Q354
ICH11
MOTOR
DRIVE
6 7
8
+B7
ICH11
MOTOR
DRIVE
1
2
4
SPE IN
-B6
Q631
+B7
VOLTAGE
REGULATOR
33 34
19 18
GND
VCC
26
IN
27
IC601
M65845FP
MIC AMP.
L
29
MIC2
OUT
MIC1 ECHO
28
VOL IN R
VOL IN VOL IN
5
10 25
VR601 VR603
MIC1 DIGITAL ECHO
VOLUME VOLUME
20
1
40
4