Sharp QT-80W Service Manual page 11

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