Sharp WQ-790W Service Manual page 9

WQ-790W
FM/SW
BAND SELECTOR
ROD ANTENNA
A
SW201-B
D202
1N4148
SW201
BAND SELECTOR
B
TRACKING fH
SW201-F
FM
MW
SW1
SW2
SW201-C
FM
MW
SW1
SW2
C
TC210
SW2
TRACKING fL
RECORD/PLAYBACK
SW302-B
TAPE1
P R
RECORD/PLAYBACK
HEAD
D
L-CH
LA
1 1
GA
2 2
R-CH
BA
3 3
RA
4 4
ERASE
HEAD
E
TAPE2
P
PLAYBACK HEAD
SW504-A
SIDE-A
A
L-CH
B
SIDE-B
SIDE-A
LB
1 1
B
GB
2 2
RB
R-CH 3 3
A
F
SIDE-B
SW504-B
SW504
TAPE2
DIRECTION
C517
150P
R452
47K
C357
120P
L-CH
R454
2.2K
J2
GND
CD/LINE
G
R-CH R453
2.2K
R451
47K
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 6.
1
IC201
LA1186N
FM FRONT END
SW201
1 2 3 4 5
C201
0.001
FM
MW
1 3
SW1 CF201
BAND PASS
SW2
FILTER
108MHz
2
FM RF
L201 C203
22P(CH)
C204
R201
fL fH
0.001
10 C211
FM
0.022
TRACKING
MW fL
L206
TC207
C243 MW
7P(CH)
SW1
SW2
MW
ANTENNA
L207
L206,L207
SW1 ANTENNA
MW/SW1 BAR
ANTENNA
L208
C245
12P(CH)
fH SW2 ANTENNA
FINE TUNING
C516 C321
R322
150P 130P
12K
C528
SW302 L304
470P
22mH
SW302-C
P R
R326
R305
33K
56
C307
0.033(ML)
R311
150K
C301
0.001(ML)
C305
33/16
C303
470P
C365
330P
R303
180K
C363
330P
24 23 20
22 21
RECORD/PLAYBACK AMP.
R P R
1 2 3 4 5
C364
330P
C366
R304
330P
180K
C306
33/16
R306
56
C515 C527
130P
470P
L303 R321
22mH 12K
SW301
AC BIAS CIRCUIT
BEAT CANCEL
R333
A B C 27K
C356
430P
C353
T301
0.0056(ML)
BIAS
OSCILLATION
C354
R332
0.01(ML)
FM SIGNAL
MW/SW1/SW2 SIGNAL
PLAYBACK SIGNAL
RECORD SIGNAL
2
Figure 8 SCHEMATIC DIAGRAM (1/4)
R207
820K
C212
0.022
R205
220K FM DETECTION
6 7 8 9
C207
3P
C214
0.022
R202
33
fL FM BAND
COVERAGE
fH
D203
R206
1N4148
47
R203
22K
T201
R204
C210
100
10/16
FM IF
SW201-E
FM
R219
100
SW201
BAND SELECTOR
MW BAND
COVERAGE
fL SW1
fH TRACKING fH fL
C238
C235
L203
360P
10P(CH)
TC203
SW201-G
FM
C241 MW OSC.
C239
3P(CH) MW C236
L204
0.0022
5P(CH)
SW1
SW2
TC204
R220
220
SW1 OSC.
C240
VC204
0.0047
TC205
VR202 C237
L205
5K(B) 5P(CH)
fH fL SW2 OSC.
SW2 BAND
COVERAGE
R327
100K
Q509 9014 C
DUBBING CONTROL
R559
100K
C311
0.0082(ML)
L361
R367
2.7mH
18K
R319
2.2K
R313
22K
R315
330K
R361
270
C317
C313
10/16
4.7/50
R317
C315
180K
330P
16 14
19 18 17 15 13
R364
IC301
1M
TA8189N
6 7 8 9 10 11 12
R320
180K
C316
330P
C318 R362
10/16 270
R368 R314
18K L302 22K
2.7mH
R318
2.2K
C362
C323 C521
0.015(ML)
22/16 0.0033(ML)
SW403
DUBBING SPEED/
R323 BUILT-IN MICROPHONE/
10K FM MODE
HIGH/
SW302-F
FM STEREO
NORMAL/FM STEREO
Q301 P R
MIC/
8050 C
SW302-A
BIAS OSC.
FM
SW403-B
P MONO
R
SW302
RECORD/
C352
PLAYBACK
10
100/16
R336
100
3 4
– 8 –
C218
T202
0.0047(ML)
R209
R208
12K
3.9K
24 23 22 21 20 19 18 17
C213
IC202
10/16
LA1805
IF AMP.& FM MPX.
FM IF
1 2 3 4 6 8
5 7
CF202
10.7MHz
1 3
C231
0.022
2
T203
1 3
AM IF
2
CF203
460kHz
AM IF
C229
0.022
R221 C228
SW201-H
1/50
47
FM
R214
SW201-A
MW
12K
SW1
R222
47
SW2
C233
0.022
fL SW1 BAND
fH COVERAGE
SW201
R223
BAND SELECTOR
47
C242
0.022
D521
1N4148
R532
SW404
47K
FUNCTION
SELECTOR
C520
0.0033(ML)
R401
R354
100
18K
D201
R246
1N4148
SW404-C
1K
C260
1/50
C262
R240
1/50
150K
R562
2.7K
R249
18K
Q202
9014 C
LINE AMP
C258
R245
1/50
100
R243
C259
100
1/50
Q203
9014 C
R241
LINE AMP
150K
R247 C263
C261
1/50 1K 1/50
SW404-D
SW404
FUNCTION SELECTOR
R355
18K
TAPE SPEED
R533
VR501
R561
47K
470(B)
47
R506
3.9K
R403
10K
Q503 R560
9015 C 56K
TAPE
SPEED
CONTROL
R510
10K
R508
10K
R512
10K
Q504
9014 C
TAPE
SPEED
CONTROL
Q505
9014 C
TAPE
SPEED
CONTROL
5
C220
470P
R210
C222
150K
3.3/50 MIC/FM M
NORMAL/FM STE
HIGH/FM STE
R211
16 15 14 13
15K
VR201
C
10K(B)
0
9 11
10 12
VCO
C224
1/50
C529
0.022
R212
10
C232
220/16
SW201-D
C256
FM
0.022
MW
SW1
C227
1/50
SW2
R218
D527
100
R213
1N4148
CD/LI
12K
RAD
TA
C534
R215
4.7/50
2.2K
D516
1N4148
R406
330
IC401
BA4558
OPE AMP.
8 C412
+ 1/50
3
(1/2) 1
–
2
R412
12K
R410
R405
12K
10K
C410
C416
4.7/50 220/16
R413
10K
C411
4.7/50
R409
12K
R411
12K
R407
2.7K
C413
–
6
1/50
(2/2)
7
+
5
4
IC401
BA4558
OPE AMP.
C404
10/16
IC502
KA7809
VOLTAGE
REGULATOR
1 3
2
C511
220/16
C512
0.1
L501
47µH
6