Schematic Diagram - Sharp QT-80W Service Manual

QT-80W
ROD
BP101
ANTENNA
BAND PASS
FILTER
88-108MHz
A S101 1
BAND
SELECTOR
2
FM
MW
SW1
SW2
TP1
S101-C
S101
BAND
SELECTOR
S101-F
B
VD101
1S2638
R106
100K
C116
0.02
R107
C117
100K
0.02
C115
S101-D
5P
R109
R108
22K
22K
C
VR101
100K(B)
FINE TUNING
SELECTOR
JACK
PWB-A2
D
5
R240
1K
R234
4.7K
MIC
2 2
1 1 C227 1
10/16
BUILT-IN
MICROPHONE
3
E
L-CH
GND
JK301
LINE INPUT
R-CH
1
F
R
P
RECORD/
G
PLAYBACK
HEAD
L-CH
4 4
3 3
TAPE
2 2
1
1
R
R-CH
S201-H
P
S201
ERASE HEAD
H
RECORD/PLAYBACK
• NOTES ON SCHEMATIC DIAGRAM can be found on page 14.
1
IC101
FM FRONT END
LA1186N
1 2 3 4 5 6
C101
0.001
3
C143
0.1
C106
22P(CH)
L102
FM RF
C102
0.001
C103
R122 C139
10 10/16
0.02
L109
FM
C141
MW BAR ANTENNA
10P
MW
SW1
SW2
T101
SW1 ANTENNA
CT104
10P
CT103
10P
T102
FM C111
SW2 ANTENNA
300P
MW
SW1
C112
SW2
5P
T103
MW OSCILLATION
C113
R124
S101
1500P
33K
BAND
CT102
10P
C114
T104
0.0047
SW1 OSCILLATION
CT101
10P
C118
T105
0.22
SW2 OSCILLATION
SWITCHING
Q204
C235
SS8550
47/16
R242
10K
5 5
4
4
C231
3 3
1/50
2 2
1 1
R302
R301
2.2K
10K
3 3
GND
2 2
1 1
R303
R304
10K
2.2K
C211
0.0022(ML)
R R
R211
18K
P P
S201
RECORD/
R212
PLAYBACK
18K
R R
C201
0.0015(ML)
C212
0.0022(ML)
P P
R250
18K
TP5
T201
C251
0.018
(ML)
BIAS
C223
OSCILLATION
C220
100P
0.0068(ML)
Q208
R253
2SC945
10K
LINE
FM(MONO)/BEAT
R254 FM(ST)
10K
TAPE(STAND-BY)
2
Figure 10 SCHEMATIC DIAGRAM (1/2)
L103 fL T103
FM BAND
COVERAGE
fH
TC1 TC4
L102 fL L100
FM
TRACKING
7 8 9 TC2 fH TC3
C107
C108
TP2
C109
R102 15P
20P
(CH) 5P
33 (CH)
T108
FM IF
R101
47
C138
220/16
R105
100
DETECTION
S101
BAND C145
100/16
SELECTOR
FM
MW
24
SW1
SW2
S101-E
1
C121
0.22 1
3
CF101
10.7MHz
2
R110
FM IF
100
FM
MW
S101-A
R111
MW IF
47
SW1
SW2
S101
BAND
SELECTOR
R112
47
C119 C120
0.22 10/16
R241
330
R237
4.7K
R256
C233
680K
1/50
Q207
2SC945
MIXING MIC
PRE AMP.
R217
330K
R218
330K
PLAYBACK/RECORD
PRE AMP. & CONTROL
IC201
BA3313L
R202
1 2 3 4 5 6 7
3.9K
C258
330P
R201
3.9K
C208
C206
0.47/50
0.022(ML)
C207
0.47/50
P
C218
BIAS OSC.
47/16
Q201
R225
3DA8050
22K
R
R224
10
C219
+B
0.022
(ML)
S301-E
S301
FUNCTION/
BEAT CANCEL
3 4
– 10 –
fL CT102 fL
MW BAND SW1 BAND
COVERAGE
fH COVERAGE
T104 fH
fL
MW T101 fL
SW1
TRACKING
fH TRACKING
fH
CT104
R103 R104
220K 820K
FUNCTION/
BEAT CANCEL
C142
C110
0.02
0.02
R118
100K
C136
0.0047
(ML)
T106
FM
TP3
TP4
23 22 21 20 19 18 17 16 15
IC102
LA1805
AM MIX AM IF GND GND
2 3 4 5 6 7 8 9 10
C125
0.015(ML)
C126
0.015
T107
(ML)
3
1
2
CF102
AM IF
R114
2.2K
C122 R116
0.02 2.2K
+B
TAPE(STAND-BY)
FM(ST)
S301-B
FM(MONO)/BEAT
LINE
S301
FUNCTION/
BEAT CANCEL
+B
IC201
BA3313L
FILTER
8 9 10 11 12
R214
100
D201
1N4148-T72
C261
R
C203
330P
R251
47/16
18K
R203
P
C215
150
S201-F
0.022(ML)
R232
120K
R209
R219
1K
27K
R210
P
R220
1K
27K
R
S201
Q501
RECORD/
3DA8050
PLAYBACK
+B
C518
0.1
C516
220/16
5
T105 fL SW2 BAND
COVERAGE
fH
CT101
T102 fL SW2
TRACKING
fH
CT103
LINE
S301
FM(MONO)/BEAT
FM(ST)
TAPE(STAND-BY)
S301-F
VR102
10K(B)
VCO
R119
15K
14 13
IC102
FM IF DET./
MW/SW MIXER
LA1805
11 12
SW2
SW1
R117
S101-B
10
MW
S101
FM
BAND
SELECTOR
+B
R123
100
LINE
S301-C
FM(MONO)/
BEAT
FM(ST)
S301
FUNCTION/
TAPE
BEAT CANCEL
(STAND-BY)
3
2
1
LINE
FM(MONO)/BEAT
FM(ST)
S301-D
TAPE(STAND-BY)
S301
FUNCTION/
BEAT CANCEL
+B
SW601
TAPE MAIN
4
PLAY
3
R501
+9V
560
2
M
1
M601
ZD501
TAPE
TZX8V2 C
MOTOR
6