Table of Contents
Advertisement
WQ-740W/WQ-780W
WQ-780W
A
SW201
FM/SW
BAND SELECTOR
ROD ANTENNA
SW201-B
D202
1N4148
SW201
BAND SELECTOR
B
MW
fL
TRACKING fH
SW201-F
FM
MW
SW1
SW2
SW201-C
FM
MW
SW1
C
SW2
TC210
fH
SW2
TRACKING fL
SW302
RECORD/PLAYBACK
SW302-B
TAPE1
D
P
R
RECORD/PLAYBACK
HEAD
L-CH
LA
1
1
GA
2
2
R-CH
BA
3
3
RA
4
4
ERASE
HEAD
E
TAPE2
P
R
P
PLAYBACK HEAD
SW504-A
SIDE-A
A
L-CH
B
SIDE-B
SIDE-A
LB
1
1
B
GB
2
2
RB
F
R-CH
3
3
A
SIDE-B
C515
SW504-B
130P
SW504
TAPE2
DIRECTION
L303
C517
22mH
150P
SW301
BEAT CANCEL
R452
A B C
47K
C357
120P
L-CH
R454
2.2K
G
J2
GND
CD/LINE
R-CH
R453
2.2K
R451
47K
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 6.
1
All manuals and user guides at all-guides.com
IC201
LA1186N
FM FRONT END
1
2
3
4
5
6
7
8
C201
0.001
FM
MW
C207
1
3
SW1
CF201
3P
BAND PASS
SW2
FILTER
108MHz
2
FM RF
L201
C203
22P(CH)
R203
22K
C204
R201
fL
fH
0.001
10
C211
C210
FM
0.022
10/16
TRACKING
L206
TC207
SW201-E
FM
R219
C243
MW
100
7P(CH)
SW1
SW2
MW
SW201
ANTENNA
BAND SELECTOR
fL SW1
TRACKING
fH
L207
SW201-G
L206,L207
C241
SW1 ANTENNA
MW/SW1 BAR
3P(CH)
ANTENNA
L208
R220
220
VC204
C245
12P(CH)
SW2 ANTENNA
VR202
5K(B)
FINE TUNING
C516
C321
R322
Q509 9014 C
150P
130P
12K
DUBBING CONTROL
R559
100K
C528
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
20
23
22
21
19
18
17
IC301
TA8189N
RECORD/PLAYBACK AMP.
R
1
2
3
4
5
6
7
8
C364
330P
C366
R304
330P
180K
C306
33/16
R306
56
C527
470P
C323
22/16
R321
12K
AC BIAS CIRCUIT
R333
27K
Q301
C356
8050 C
430P
BIAS OSC.
C353
T301
0.0056(ML)
BIAS
OSCILLATION
C354
R332
C352
0.01(ML)
10
100/16
FM SIGNAL
MW/SW1/SW2 SIGNAL
PLAYBACK SIGNAL
RECORD SIGNAL
2
3
Figure 14 SCHEMATIC DIAGRAM (4/6)
R207
820K
C212
T202
0.022
R205
R208
FM DETECTION
220K
3.9K
9
C214
24
0.022
R202
C213
33
10/16
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
L203
360P
10P(CH)
TC203
R221
SW201-H
47
FM
MW OSC.
C239
MW
C236
0.0022
L204
5P(CH)
SW1
SW2
R222
TC204
47
SW1 OSC.
C240
fL SW1 BAND
0.0047
fH
COVERAGE
TC205
R223
47
C237
C242
L205
5P(CH)
0.022
fH
fL
SW2 OSC.
SW2 BAND
COVERAGE
R327
100K
C311
R532
0.0082(ML)
47K
L361
C520
R367
2.7mH
0.0033(ML)
18K
R319
2.2K
R313
22K
SW404-C
R315
C260
330K
1/50
R240
150K
R361
270
C317
R249
C313
10/16
18K
4.7/50
Q202
9014 C
R317
C315
LINE AMP
180K
330P
C258
R245
1/50
100
16
14
15
13
R364
1M
C259
1/50
9
10
11
12
R241
150K
R320
180K
C261
R247
C316
1/50
330P
SW404-D
R362
C318
SW404
270
10/16
FUNCTION SELECTOR
R355
R368
R314
18K
18K
L302
22K
2.7mH
TAPE SPEED
R533
VR501
47K
470(B)
R318
2.2K
C362
C521
0.015(ML)
0.0033(ML)
Q503
9015 C
TAPE
SPEED
SW403
CONTROL
DUBBING SPEED/
BUILT-IN MICROPHONE/
R323
FM MODE
10K
HIGH/
SW302-F
FM STEREO
R510
10K
NORMAL/FM STEREO
P
R
MIC/
SW302-A
R508
FM
10K
SW403-B
P
MONO
R512
R
10K
SW302
RECORD/
Q504
PLAYBACK
9014 C
TAPE
SPEED
CONTROL
Q505
9014 C
TAPE
SPEED
CONTROL
R336
100
4
– 14 –
C220
470P
C218
0.0047(ML)
R209
R210
C222
12K
150K
3.3/50
23
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
C227
C228
1/50
SW2
1/50
R218
FM
100
R214
R213
SW201-A
MW
12K
12K
SW1
SW2
C534
C233
R215
4.7/50
0.022
2.2K
SW201
D516
BAND SELECTOR
1N4148
D521
1N4148
SW404
FUNCTION
SELECTOR
R401
R354
100
18K
D201
R406
R246
1N4148
1K
330
C262
1/50
R562
2.7K
IC401
BA4558
OPE AMP.
8
+
3
(1/2)
1
–
2
R243
100
R412
12K
R410
Q203
R405
12K
10K
9014 C
LINE AMP
C263
1K
1/50
C410
4.7/50
R413
10K
C411
4.7/50
R409
R561
12K
47
R411
12K
R407
R506
2.7K
3.9K
–
6
R403
10K
(2/2)
7
+
R560
5
56K
4
IC401
BA4558
OPE AMP.
C404
10/16
IC502
KA7809
VOLTAGE
REGULATOR
1
3
2
C511
220/16
C512
0.1
5
6
MIC/FM M
NORMAL/FM ST
HIGH/FM ST
R211
15K
VR201
10K(B)
0
VCO
C529
0.022
C232
220/16
C256
0.022
D527
1N4148
CD/L
RA
TA
C412
1/50
C416
220/16
C413
1/50
L501
47µH
Advertisement
Table of Contents
