Schematic Diagram / Wiring Side Of P.w.board - Sharp WQ-740W Service Manual

WQ-740W/WQ-780W
WQ-740W
FM/SW
ROD ANTENNA
A SW201
BAND SELECTOR
FM
SW201-B
MW
SW1
D202
SW2
1N4148
B MW fL
TRACKING fH
SW201-F
FM
MW
SW1
SW2
SW201
BAND
SELECTOR
SW201-C
FM
MW
SW1
SW2
C
TC210
SW2 fH
TRACKING fL
C516
150P
SW302
RECORD/PLAYBACK
SW302-C
SW302-B
TAPE1
RECORD/PLAYBACK P R P
D
HEAD
L-CH
LA
1 1
GA
2 2
R-CH
BA
3 3
RA
4 4
ERASE
HEAD
E
SW302-E SW302-D
P R P
TAPE2
PLAYBACK HEAD
L-CH
LB
1 1
GB
2 2
RB
3 3
F
R-CH
C515
130P
L303
C517
22mH
150P
SW301
BEAT CANCEL
R452
47K A B C
C356
C357
L-CH R454 430P
120P
2.2K
G GND
J2
CD/LINE
R-CH R453
2.2K
R451
47K
FM SIGNAL
MW/SW1/SW2 SIGNAL
PLAYBACK SIGNAL
H RECORD SIGNAL
• NOTES ON SCHEMATIC DIAGRAM can be found on page 6.
1
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IC201
LA1186N
FM FRONT END
1 2 3 4 5 6 7 8
C201
0.001
C207
CF201
1 3 3P
BAND PASS
FILTER
108MHz
R202
2
FM RF
L201 C203
22P(CH)
R203
22K
C204
R201
fL fH
0.001
10 C211
FM C210
0.022
TRACKING 10/16
SW201
L206 BAND SELECTOR
TC207
FM
R219
MW
C243
100
7P(CH)
SW1
SW2 SW201-E
MW
ANTENNA
fL SW1
fH TRACKING
L207
SW201-G
L206,L207 FM
C241
SW1 ANTENNA
MW/SW1 BAR 3P(CH) MW
ANTENNA
SW1
L208
SW2
R220
220
VC204
C245
12P(CH)
SW2 ANTENNA
VR202
5K(B)
FINE TUNING
C321
R322
130P
12K
DUBBING CONTROL
R559
C528 100K
L304
470P
22mH
Q509
9014 C
R
R326
R305
33K
56
C307
0.033(ML)
R311
150K
C303 C305
0.001 33/16
C365
330P
R303
180K
C363
330P
24 23 22 21 20 19 18 17 16
IC301
TA8189N
RECORD/PLAYBACK AMP.
R
1 2 3 4 5 6 7 8
C364
330P
R304
C366
180K
330P
C306
33/16
R306
56
C527
470
R321
12K
AC BIAS CIRCUIT
R333
27K
Q301
8050 C
BIAS OSC.
C353
T301
0.0056(ML)
BIAS
OSCILLATION
R332
10
C354
C352
0.01(ML)
100/16
2 3
Figure 8 SCHEMATIC DIAGRAM (1/6)
R207
820K
C212
T202
0.022
R205 R208
FM DETECTION
220K 3.9K
9
C214
24 23
0.022
C213
10/16
33
fL FM BAND
fH COVERAGE
FM IF
1 2
D203
R206
CF202
1N4148
47
10.7MHz
1 3
C231
0.022
T201
R204
100 2
FM IF
MW BAND
COVERAGE
fH fL
C229
0.022
C238
C235
360P L203
10P(CH)
R221
TC203
47
SW201-H
BAND SELECTOR
MW OSC.
C239
C236
FM
L204
0.0022
5P(CH)
MW
SW1
R222
TC204
47
SW2
SW1 OSC.
C240 fL SW1 BAND
0.0047 COVERAGE
fH
TC205
R223
47
C237
C242
5P(CH) L205
0.022
fH fL
SW2 OSC.
SW2 BAND
COVERAGE
R327
100K
C520
0.0033(ML)
C311
R532
L361
0.0082(ML)
47K
2.7mH
R367
18K
R313
22K SW404-C
SW404
R315
C260
330K FUNCTION
1/50
SELECTOR
R240
150K
R361
270
C313 R249
C317
4.7/50 18K
10/16
Q202
R317 9014 C
C315
180K LINE AMP.
330P
C258
R245
1/50
100
15 14 13
R364
1M
C259
1/50
Q203 9014 C
9 LINE AMP.
10 11 12
R241
150K
R320
180K
C261
C316 R247
1/50
330P 1K
SW404-D
SW404
C318 R362
FUNCTION SELECTOR
10/16 270
R355
R368
R314
18K
18K L302
22K
2.7mH
TAPE SPEED
R533
VR501
47K
470(B)
R318
2.2K
C521
C362
0.0033(ML)
0.015(ML)
Q503
9015 C
TAPE
SPEED
SW403
CONTROL
DUBBING SPEED/
R323
BUILT-IN MICROPHONE/
10K
FM MODE
SW403-B
SW302-F HIGH/FM STEREO
NORMAL/FM STEREO R510
P R
10K
MIC/FM MONO
SW302-A R508
10K
P
SW302
R512
RECORD/
Q504
10K
R PLAYBACK
9014 C
R330
TAPE
100
TAPE
SPEED
CONTROL
R513
10K
Q505
9014 C
TAPE
SPEED
CONTROL
R336
100
4
– 8 –
C220
470P
C218
0.0047(ML)
R210
R209
C222
150K
12K
3.3/50
22 21 20 19 18 17 16 15 14 13
IC202
LA1805
IF AMP.& FM MPX.
3 4
5 6 7 8 9 10 11 12
T203
1 3
C224
1/50
AM IF
2
R212
CF203 10
460kHz
AM IF
SW201-D
FM
MW
SW1
C228 C227
SW201
1/50 1/50 SW2
R218
R213 100
R214
SW201-A
12K 12K
C233 C534
R215
0.022 4.7/50
2.2K
D516
1N4148
D521
1N4148
R401
R354
100
18K
R406
R246
330
1K
C262
1/50
R562
2.7K
IC401
BA4558
OPE AMP.
8
+
3
(1/2) 1
–
2
R243
100
R408 R412
2.7K 12K
R410
R405
12K
10K
C263
1/50
C416
C410
4.7/50 220/16
C411
4.7/50
R413
10K
R409
12K
R561
47
R411
12K
R407
R506
2.7K
3.9K
6 –
R403
(2/2)
10K
7
+
R560
5
4
56K
IC401
BA4558
OPE AMP.
IC502
C404
10/16
KA7809
VOLTAGE
REGULATOR
1 3
2
C511
220/16
C512
0.1
5 6
MIC/FM M
NORMAL/FM STE
HIGH/FM STE
R211
15K
VR201
10K(B)
0
VCO
C529
0.022
C232
220/16
C256
0.022
D527
1N4148
CD/L
RA
TA
4
C412
1/50
C413
1/50
L501
47µH