Ic Block Diagram - Sharp QT-80W Service Manual

3
22
RF AMP MIX
23
RNG. OSC
24

IC BLOCK DIAGRAM

X-BASS
R317
CONTROL
10K
Q303
2SC945
R221
220
C256
1000/16
C305
R305 R306
1/50
4.7K 6.8K
R325
R307
22K
3.9K
S302-A
ON OFF
C309
3 S302
0.0015(ML)
3
X-BASS
2
1
1
C311
OFF
ON
0.0015
S302-B
(ML)
X-BASS PWB-A5
R309
6.8K
R308
C306
4.7K
1/50
R326
22K
Q304
R318
2SC945
X-BASS
CONTROL
+B
D401
1N4148-T72
MOTOR
CONTROL
4
Q401
3
3DA8050
2
R410
1
560
ZD401
TZX10V C
7
FM
5 1 2
20 17 16
POST
FM IF DCT
AMP.
LEVEL DET
MUTING
AM IF
DET
TUNING
AGC
INDIC.
DRIVE
GND
8
6 4 12 19
IC101: LA1186N
VRE1
MIX
RF
1 2 3 4
FM SIGNAL
MW/SW1/SW2 SIGNAL
R314
2.2K
R311 C308
330K 1/50
Q301
2SC945 R313
470
VOLUME
C301
220P CONTROL
6
6 6
VR301-A
2 2
VR301
4 4
50K(B)
5 5
VOLUME
7 7
1 1
VR301-B
3
3
3
VOLUME PWB-A4
CN303
C307
1/50
R312
R315
330K
2.2K
Q302 VOLUME
2SC945 CONTROL
R316
C302
470
220P
10K
+B
Q404
R409
SS8550
REGULATOR 2.2
+B
+B
Q405
SS8550
R431
R434
22K
22K
S301
R433
FUNCTION/
1K
BEAT CANCEL
S301-A
LINE
FM(MONO)/BEAT
FM(ST)
TAPE(STAND-BY)
8 9
Figure 11 SCHEMATIC DIAGRAM (2/2)
AM
7
11 13 15 14 21
Vcc
STEREO
PILOT DET
TNG.
INDIC.
DRIVE
PHASE DET FF
VCO
STEREO
DECODER
SW
IC102: LA1805
9
18 10
BUTTER
OSC
REG
5 6 7 8 9
PLAYBACK SIGNAL
RECORD SIGNAL
MAIN PWB-A1
C417
R423
0.1
47K
STAND-BY
6 1
C401
R401
1/50 3
1K
5
2
C403
4
47/16
R405
220
IC401
7
C416
100/16
9
R406
C404 11
220
47/16
8
10
R402
12
1K
C402
1/50
R404
C419
33K
1000P
IC401
BA5415A
POWER AMP.
+12V DC
+B
+B
10
– 11 –
Vcc
OUT 1 1
150K
3
NF 1
IN 1 5
ALC
GND 7
FF
9
IN 2
FF
11
NF 2
150K
IC201: BA3313L
0.1µ
ST. BY
6 1
3
5
33K
240 2
4
44K
47µ
7
100µ
47µ
44K
9
240
11
8
10
33K
12 IC401: BA5415A
GND
4 4
3 3
2 2
1 1
+B
C413
470/16
C405
0.1
C407
HEADPHONES
47/16
C409
PWB-A3
1000/16
5
R413 5 5
C411
3.3
0.1(ML)
4 4
3 3
C412
2 2
R414
0.1(ML)
3.3
1 1
1
C410
1000/16
C408
47/16
C406
0.1
BATTERY
PWB-A6
BATTERIES
DC 12 V [ "D" SIZE
(UM/SUM-1, R20 or
+B
HP-2)BATTERY x 8 ]
2 2
+B
1 1
F501
T2A L 250V
+B
SELECTOR
AC 220-240 V
AC 110-127 V
0V
T501
POWER
TRANSFORMER
11
QT-80W
2 ALC
4 N.C.
6
GND(SUB)
8
VCC
10
FILTER
12
OUT 2
VCC
0.1µ
1000µ
47µ
1000µ
1000µ
47µ
SP503
6 OHM
R-CH
SPEAKERS
SP504
6 OHM
SP501
6 OHM
L-CH
SPEAKERS
SP502
6 OHM
R408
150
R407
150
BATTERY (+12V)
SW501
VOLTAGE
AC POWER
SUPPLY CORD
AC 110-127 V/
220-240 V,
50/60 Hz
SO501
AC INPUT SOCKET
AC 110-127 V/220-240 V,
50/60 Hz
12