Schematic Diagram - Sharp QT-90W Service Manual

QT-90W
MAIN PWB-A1
BP101
BAND PASS
FILTER
0.001
10.7MHz
S101
A 1 3
BAND
SELECTOR
2
FM
S101-C
MW
SW1
SW2
TP1
S101
BAND
SELECTOR
VD101 FM
C115
1S2638
5P(CH)
S101-F
MW
SW1
B
SW2
R106
100K
C116
0.02
R107
C117
100K
0.02
R108
22K FM
S101-D MW
VR101
100K(B) SW1
FINE TUNING
SW2
C
S101
BAND
JACK
SELECTOR
PWB-A2
L-CH
GND
JK201
LINE INPUT
R-CH
3
3
D
2
1
1
MIC
2 2
1 1
5
5
4
C233
0.47/50
3
E
2
1
1
C227
10/16
C212
0.0022(ML)
F
R211
18K
R
P
RECORD/
G
PLAYBACK
HEAD
L-CH
4
4
3 3
TAPE P
2 2
1
1
R-CH
R
S201
RECORD/
PLAYBACK
ERASE HEAD
H
P
• NOTES ON SCHEMATIC DIAGRAM can be found on page 9.
1
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IC101
FM FRONT END
LA1186N
1 2 3 4 5 6 7 8 9
C101
TP2
C140
0.1
T108
C106
FM IF
18P(CH)
L102
FM RF
C102
0.001
C103 C139
R122
10/16
0.02
10
L109
MW BAR ANTENNA
SELECTOR
FM
MW
T101
SW1 ANTENNA
SW1
CT104
SW2
10P
CT103
10P
T102
C111
SW2 ANTENNA
33P(CH)
R110
100
C112
5P(CH)
T103
MW OSCILLATION SW1
C113
R124
1500P
33K
R111 SW2
47
CT102
10P
C114
T104
0.0047(ML)
SW1 OSCILLATION
CT101
R112
10P
47
C119
0.02
T105
C118
SW2 OSCILLATION
0.1
R109
22K
3
R242
2
27K
1
R244
R243
R245
27K
2.2K
2.2K
SWITCHING
Q207
SS8550
C237
47/16
R248
10K
5
4
R235
C223
3
680K
1/50
2
MIXING MIC
1
PRE AMP.
R258
47K
C209 C210
0.0082 0.0082
(ML) (ML)
IC201
BA3313L
R R
R202
R212
1
3.9K
18K
P P
S201
RECORD/
PLAYBACK
R R
R208
6.8K
C211
P P
0.0022
(ML)
R251
18K
TP5
T201
C231
Q201
C217
0.018 R227
3DA8050
47P(CH)
(ML) 22K
BIAS
OSCILLATION
C220
Q209
0.0068(ML)
2SC945
R255 R256
10K 10K
R
2 3
Figure 10 SCHEMATIC DIAGRAM (1/2)
L103 fL FM BAND T103 fL MW BAND
COVERAGE COVERAGE
TC1 fH TC4 fH
L102 fL FM L100 fL
MW
TRACKING TRACKING
TC2 fH TC3 fH
C107
C108
C109
R102 R103
15P
20P
(CH) 5P(CH)
220K
33 (CH)
C141
C110
5P(CH)
0.02
R101
T106
47
C138
FM DET.
220/16
R105
100
S101
BAND
24 23 21
22 20
IC102
LA1805
S101-E
AM MIX AM IF
1 2 3 4 5
C121
0.02
1 3
CF101
10.7MHz
2
FM IF
FM
T107
MW S101-A
MW IF
3
1
S101
2
BAND CF102
AM IF
SELECTOR
C122
0.1
C120
10/16
R221
330
+B
LINE
S301-B
R226
FM(MONO)/BEAT
4.7K
FM(ST)
S301
TAPE(STAND-BY)
FUNCTION/
BEAT CANCEL
C224
1/50
Q205
2SC945
R217
150K
R218
150K IC201
PLAYBACK/RECORD PRE AMP. & CONTROL
BA3313L
FILTER
2 3 4 5 6 7 8 9 10 11
D201
1N4148
C260
680P
R205
220K
R204
39
R201
3.9K
C207
4.7/50
R210
1.5K
R249
C225
47/16
C318
47/16
LINE
FM(MONO)/BEAT
C319
47/16
FM(ST)
S301-E
TAPE
(STAND-BY)
S301 C320
D303
FUNCTION/ 47/16
1N4148
BEAT CANCEL
R363
10K
4
– 10 –
CT102 fL T105 fL
SW1 BAND SW2 BAND
COVERAGE
fH COVERAGE
T104 CT101 fH
T101 fL SW1 T102 fL
SW2
TRACKING TRACKING
CT104 fH fH
CT103
R104
LINE
S301
820K
FUNCTION/
FM(MONO)/
BEAT CANCEL
BEAT
FM(ST)
S301-F
R118
TAPE
100K
(STAND-BY)
VR102
C136
0.0047 10K(B)
(ML)
VCO
R119
15K
IC102
FM IF DET./
TP3
TP4
MW/SW MIXER
LA1805
15 13
19 18 17 16 14
GND GND
6 7 8 9 10 11 12
S101
C125
BAND
0.015(ML)
SELECTOR
FM
MW
R117
S101-B
10
C126 SW1
0.015(ML)
SW2
C130
0.02
R114
2.2K
R116
2.2K
R123
100
Q303
C343
2SC945
1/50
C344
1/50
R314
10K
R321
R320
X-BASS
6.8K
CONTROL
X-BASS
R315 2SC945
CONTROL
10K
12
R214
330
C261
33P(CH)
C203
10/16
R P
R252
18K
P
R
S201-E S201
PECORD/
PLAYBACK
R209
1.5K
C618
0.1
R247
+B
22K
Q601
120
3DA8050
+B
D301
1N4148
SW601
TAPE MAIN
D302
R361
PLAY
1N4148
10K
M
M601
R362
TAPE
10K
MOTOR
5 6
+B
6.8K
Q304
4
3
2
1