Page 1
WQ-730H
SERVICE MANUAL/SERVICE-ANLEITUNG/MANUEL DE SERVICE
No. SX672WQ730HBK
WQ-730H(BK)
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified
should be used.
• Im Interesse der Benutzer-Sicherheit sollte dieses Gerät wieder
auf seinen ursprünglichen Zustand eingestellt und nur die
vorgeschriebenen Teile verwendet werden.
• Dans l’intérêt de la sécurité de l’utilisateur, l’appareil devra être
reconstitué dans sa condition première et seules des pièces
identiques à celles spécifiées, doivent être utilisées.
E
IMPORTANT SERVICE NOTES (FOR UK ONLY) ....... 2
SPECIFICATIONS ........................................................ 2
NAMES OF PARTS ...................................................... 4
FITTING OF DIAL POINTER ........................................ 4
DISASSEMBLY............................................................. 6
ADJUSTMENT .............................................................. 8
D
TECHNISCHE DATEN.................................................. 2
BEZEICHNUNG DER TEILE ........................................ 4
ANBRINGEN DES SKALENZEIGERS ......................... 4
ZERLEGEN................................................................... 6
EINSTELLUNG ............................................................. 8
F
CARACTÉRISTIQUES.................................................. 2
NOMENCLATURE ........................................................ 4
FIXATION DE L’AIGUILLE ........................................... 4
DÉMONTAGE ............................................................... 6
RÉGLAGE..................................................................... 8
INHALTSVERZEICHNIS
TABLE DES MATIÈRES
Page
Seite
Page
CONTENTS
Page
NOTES ON SCHEMATIC DIAGRAM ......................... 11
SCHEMATIC DIAGRAM / WIRING
SIDE OF P.W.BOARD ............................................... 12
PACKING METHOD (FOR UK ONLY)........................ 16
REPLACEMENT PARTS LIST/EXPLODED VIEW
Seite
ANMERKUNGEN ZUM SCHEMATISCHEN
SCHALTPLAN............................................................ 11
SCHEMATISCHER SCHALTPLAN/
VERDRAHTUNGSSEITE DER LEITERPLATTE....... 12
ERSATZTEILLISTE /EXPLOSIONSDARSTELLUNG
Page
REMARQUES CONCERNANT LE DIAGRAMME
SCHÉMATIQUE......................................................... 11
DIAGRAMME SCHÉMATIQUE/CÔTÉ CÂBLAGE DE
LA PLAQUETTE DE MONTAGE IMPRIMÉ............... 12
LISTE DES PIÈCES DE RECHANGE /VUE EN ÉCLATE
SHARP CORPORATION
– 1 –
Page 2
WQ-730H
A
B
C
D
E
F
G
FM
ROD ANTENNA
BAR ANTENNA
PLAYBACK HEAD
L-CH
R-CH
RECORD/PLAYBACK
L-CH
R-CH
ERASE
HEAD
L4
LW
ANTENNA
L3
MW
TAPE2
HEAD
TAPE1
SW1F
BAND
SELECTOR
FM
MW
LW
D1
1N4148
LW
MW
MIC101
BUILT-IN
MICROPHONE
FM BAND PASS
SW1B
FM
39P (CH)
CNS101
CNS103
FILTER
BPF1
321
C1
10P
(CH)
C40
0.001
LW
MW
FM
FM
MW
LW
TC7 TC8
C12
5P
(CH)
TC2
C11
CNP106
CNS105
2
2
1
1
RECORD/PLAYBACK
CNP102
1
1
2
2
3
3
1
1
2
2
3
3
4
4
CNP104
MAIN PWB-A1
RF AMP.
1
C2
0.001
C3
22P
(CH)
SW1 : BAND SELECTOR
SW1E SW1G
SW1CSW1A
R108
C101
1/50
VC7
100
VC8
C105
R109
1/50
1K
C103
0.018
R110
(ML)
HI-SPEED DUBBING : ( )
R105
1K
R106
8.2K
SW101 :
C151
150P
SW102
BEAT
CANCEL
C
A
B
C113
120P
C114
2
TC5
VC5
C5
0.02
LW
MW
FM
FM
MW
LW
C15
300P
C14
7P
(CH)
MIC AMP.
R111
330K
9014 C
0.7V
0.1V
4.7K
C106
220P
C104
0.001
MIC REC : < >
C102
10/25
C153
130P
SW101F
SW101D
R
C115
330P
0.001 (ML)
MIX
GND VCC
4
3
56
C7
C4
3P
5P
(CH)
(CH)
C8
15P
(CH)
FM
FM RF
TC6
VC6
OSC.
L2
Q101
2.2V
L101
22mH
C152
L1
R112
R151
150P
BIAS
OSC.
L105
C107
1/50
12K
P
L102
22mH
C43
68
R1
100
0.02
(0V)
47K
R113
SW101E
SW101C
R
C116
0.02
C6
0.001
C17
240P
(S)
TC4
MIC
MUTING
Q102
9014 C
(0V)
(0.7V)
R116
10K
R107
4.7K
Q103
9014 C
LINE AMP.
PRPR
P
C154
D2
22P (RH)
C41
C155
130P
C156
R152
12K
C117
0.0082
(ML)
IC1
OSC
TA7378P
FM FRONT END
89
7
R2
33
FM IF
T1
1N4148
+B
OSC.
L6
MW
OSC.
C20
0.02
C16
180P
SW101A
RECORD/
PLAYBACK
R114
4.7K
C108
47/10
R117
10K
C109
10/25
R118
<0V>
10K
<0.7V>
R153
820P
820P
C157
C185
330P
C187
23
24 2122 19
CH2
CH2
/B
/A
CH1
CH1
/B
/A
2
1
C188
330P
C186
330P
C162
0.033
(ML)
R154
820P
820P
C158
BIAS
OSC.
R120
27K
0.6V
C118
0.012
(ML)
FM IF
CF1
10.7MHz
31
R4
47
2
C42
0.001C90.02
R5
100
LW
MW
FM
SW1D
BAND
SELECTOR
SW1H
FM
L7
LW
R115
220
DUBBING SPEED
NORMAL
MIC ON
1N4148
56
330P
56
4.6V
MW
LW
C30
1/50
C31
100/10
+B
R8
100
P
R
+B
SW103
/MIC
SW103B
D104
HIGH
1N4148
R119
D101
4.7K
C110
10/25
<0V>
R185
R161
33K
22K
C161
R157
0.033
5.6K
(ML)
C159
10/25
R159
R155
4.7K
180K
20 18 17 16 15 14 13
PRE
NF
MATAL
OUT
OUT
TA8189N
MATAL
PRE
NF
OUT
OUT
4
3
5
R156
C160
180K
10/25
R158
5.6K
C164
R160
4.7/50
4.7K
R186
R162
33K
22K
R122
Q105
100
8050 D
0.4V
R121
R123
47
100
C119
100/10
SW101 : RECORD/PLAYBACK
R3
220K
+B
FM DET
C22
C21
C44
0.02
R126
22K
C163
4.7/50
IC101
R125
HI-SPEED DUBBING : ( )
NORMAL SPEED : OTHER
10/16
24
AM
OSCAMRF
FM IF
IN
1
1N4148
D105
1N4148
10K
R163
A/B
VCC
MIX
GND1 M/N
OUT
6
R164
10K
D106
1N4148
220
R
SW101B
P
0.02
22 21 20 19 18 17 16 15 14 13
23
VCC
AM
MIX
4
2
3
C33
0.04
0.02
7
C32
AM IF
D5
4.7/50
1N4148
C165
2200/10
C168
2.2/50
PRE AMP.
8
C166
22/16
R166
10K
+B
C34
22/16
T3
C39
D6
R169
2.2K
C169
4.7/50
C171
R167
180K
REC
OUT
REC
OUT
9
R168
180K
C172
C170
4.7/50
R170
2.2K
R131
10K
C23
0.04
C24
T2
0.0039
(ML)
C25
R9
3.9K
AM
IC2
DET
LA1805
IF AMP.&FM MPX.
AM
GND
IF
5
6
+B
3
1
CF2
AM IF
460kHz
2
D102
R124
1N4148
22K
R127
100
C167
22/16
R171
C175
330K
0.015
(ML)
R173
220
10/25
C173
0.001
C183
330P
REC
ALCREC
NF
IN
REC
REC
GND
NF
IN
121110
C184
330P
C174
R174
0.001
220
10/25
C176
R172
0.015
330K
(ML)
+B
VOLTAGE
REGULATOR
D501
8050 D
1N4148
7.6V
8.2V
C502
0.02
C503
0.02
R503
10K
R504
10K
+B
R10
470K
C26
470P
R11
12K
(ML)
C27
0.0082
FM
DET
OUT
7
C35
+B
+B
L103
2.7mH
C177
4.7/50
1M
C179
R183
22/16
C178
4.7/50
L104
2.7mH
Q501
12V
R501
680
R502
C505
100
0.02
C504
220/10
D502
MTZJ8.2C
(0V)
(0.7V)
0.7V
0V
0V
Q502
(0V)
9014 C
Q502, Q503 : SWITCHING
SW103A
FM MONO/FM STEREO
FM STEREO FM MONO
R12
100K
R13
15K
C28
3.3/50
3.3/50
MPX
IN
R-CHL-CHGND
1110 12
98
C37
R15
4.7/50
10K
R16
C38
10K
4.7/50
C36
0.012 (ML)
0.012 (ML)
POWER ON/RADIO
STAND-BY/TAPE
D103
1N4148
R175
47K
R177
R178
R176
SW401
FUNCTION
SW401A
+B
C181
0.0082
(ML)
22K
22K
C182
0.0082
(ML)
47K
C506
C509
0.02
(0V)
0.7V
Q503
9014 C
0.02
(10.2V)
SW401B
FUNCTION
22K
R179
22K
R180
POWER ON/CD
RADIO
STAND-BY/TAPE
R505
10K
(10.3V)
0V
R507
100K
0V
(0V)
2.2K (B)
SPEED
Q504 : MOTOR CONTROL
10K (B)
VCO
R18
2.7K
STAND-BY
/TAPE
POWER ON
/RADIO
10.3V
VR501
TAPE
VR1
L501
22µH
VCO
+B
R14
820
R17
2.7K
STAND-BY
/TAPE
10.9V
(10.8V)
Q504
8555 D
10.9V
(6.9V)
R509
6.8K
R508
C29
0.0015
(S)
SW401D
POWER ON
/RADIO
R181
22K
SW401 :
FUNCTION
SELECTOR
SW401C
R182
22K
+B
+B
470
C507
100/25
56K
R510
470
R20
+B
+B
0.02
C508
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 11.
1
23456
Figure 12 SCHEMATIC DIAGRAM (1/2)
– 12 –
Page 3
WQ-730H
4.8V
4.9V
1.4V
5V
0V
1.4V
4.9V
1.4V
0.7V
5.9V
0V
5.9V
9.9V
0.6V
0V
10.8V
12V
0V
0.6V
9.9V
12V
0V
5.23V
2.6V
2.6V
3.2V
2V
2V
3.2V
4.9V
4.9V
4.3V
4.3V
4.9V
4.9V
4.3V
4.3V
4.9V
4.9V
4.3V
4.3V
4.9V
4.9V
4.3V
4.3V
0V
0V
1.2V
1.3V
1.4V
<0V>1.6V
5.5V
1.4V
2V
1.3V
0V
0.9V
0V
0V
1.3V
2V
(3.5V)
0V
1.3V
1.4V
1.3V
1.2V
0V
0V
0V
1.6V
1.6V
1.1V
1.5V
1.6V
0.6V
6.2V
6.2V
0.9V
1.6V
0V
5.3V
5.5V
0.4V
1.6V
1.5V
1.7V
1.7V
1.7V
1.1V
1.7V
1.7V
1.7V
1.7V
0.9V
6.2V
2.3V
0.9V
4.6V
2.3V
0V
5.7V
0V
1.7V
0.7V
6.2V
2.3V
2.3V
0V
5.6V
0V
1.6V
1.4V
5.1V
1.6V
1.6V
1.7V
1.7V
MIC REC : < >
Q401, Q402 : MUTING
3V
6.1V
3V
3V
3V
0V
3V
3V
<0.7V>
<0.7V>
0V
0V
0V
0V
10.9V
(10.8V)
10.9V
(6.9V)
R208
1K
VR205B
50K (B)
X-BASS
R207
1K
(N.P)
R-CH
L-CH
+
–
A
B
SW503
TAPE2 PLAY
SW502
TAPE1 MAIN
SW501
TAPE2 MAIN
M501
TAPE
MOTOR
M
8
7
6
5
4
3
2
CNS502
1
VOLUME
C232
0.0018
(ML)
C234
0.068
(ML)
C231
0.0018
(ML)
C233
0.068
(ML)
R233
5.6K
R234
5.6K
VR206B
50K (B)
R232
3.3K
R231
3.3K
VOLUME
VR206A
50K (B)
4
3
2
CNP505
1
4
3
2
CNS506
1
SW301 : SURROUND
ON
ON
ON
ON
OFF
OFF
OFF
OFF
C422
0.02
INPUT
INPUT
IC201
GRAPHIC EQUALIZER PWB-A2
SURROUND PWB-A5
LED PWB-A4
D522
L-34HD
FM STEREO
D521
L-34HD
POWER/BATT.
MW BAND
COVERAGE
TC8
L6
fL
fH
MW
TRACKING
TC7L3
fL fH
FM BAND
COVERAGE
TC6L2
fL fH
TC5L1
fL fH
FM
TRACKING
LW BAND
COVERAGE
TC4L7
fL
fH
LW
TRACKING
TC2L4
fL fH
IC1
VOLTAGE
9
8
7
6
5
4
3
2
1
IC401
VOLTAGE
12
11
10
9
8
7
6
5
4
3
2
1
VOLTAGE
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
PIN
NO.
PIN
NO.
IC101
VOLTAGE
PIN
NO.
PIN
NO.
PIN
NO.
24
23
22
21
20
19
18
17
16
15
14
13
VOLTAGE
12
11
10
9
8
7
6
5
4
3
2
1
IC2
VOLTAGE
AM
VOLTAGE
FM
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
VOLTAGE
AM
VOLTAGE
FM
PIN
NO.
RECORD SIGNAL
PLAYBACK SIGNAL
MW/LW SIGNAL
FM SIGNAL
SP704
SURROUND
SP703
SURROUND
SPEAKERS
SPEAKERS
SP701
WOOFER
SP702
WOOFER
D301
SLR-56DU3F
SURROUND
R313
220
2.2/16
C702
C701
2.2/16
(N.P)
SW301D
SW301B
SW301C
SW301A
CNS702
1234
CNS304
1234
CNP701
1234
C412
100/16
C411
100/16
C413
0.22 (ML)
C420
0.02
C421
0.02
CNP303
1234
CNS204
1234
5
CNP203
1234
5
6
5
432
CNS202
1
+B
GRAPHIC EQUALIZER
3.3kHz 330Hz
1kHz10kHz
1kHz 3.3kHz330Hz
10kHz
GRAPHIC EQUALIZER
GRAPHIC EQUALIZER
R205
330
C201
4.7/50
R202
2.2K
C204
1/50
C208
0.022
(ML)
R204
1K
C202
4.7/50
C206
4.7/50
VR201B
50K (B)
C224
1/50
C220
0.33/50
C216
0.1
(ML)
C212
0.033
(*ML)
VR202B
50K (B)
VR203B
50K (B)
VR204B
50K (B)
C222
0.033
(ML)
C218
0.01
(ML)
C214
0.0033
(ML)
C210
0.001
(ML)
C225
100/10
R203
1K
R201
2.2K
C207
0.022
(ML)
C203
1/50
VR201A
50K (B)
VR205A
50K (B)
X-BASS
VR204A
50K (B)
VR202A
50K(B)
VR203A
50K (B)
C211
0.033
(ML)
C215
0.1
(ML)
C205
4.7/50
C219
0.33/50
C223
1/50
C209
0.001
(ML)
C213
0.0033
(ML)
C217
0.01
(ML)
C221
0.033
(ML)
IC201
BA3822LS
GRAPHIC
EQUALIZER
202218
8
6
4
2
24 12141016
23 21 19 17 15 13 11
9
75
31
LED PWB-A3
R404
1K
POWER PWB-A6
C508
0.02
CNP503
2
CNS504
2
11
STAND-BY
/TAPE
POWER ON
/RADIO
SW401C
SW401D
IC301
(2/2)
IC301
(1/2)
IC301
BA4558N
OPE AMP.
R310
12K
R304
10K
R314
330
R302
100K
R301
100K
C302
0.0068 (ML)
C301
0.0068 (ML)
C304
10/25
C303
10/25
R303
10K
7
4
5
6
C312
47/10
C311
10/25
R312
10K
R311
10K
C310
1/50
C309
1/50
8
1
3
2
R308
12K
R306
2.7K
C308
4.7/50
C306
0.0033
(ML)
C307
4.7/50
R307
12K
C305
0.0033
(ML)
R305
2.7K
R309
12K
R416
100
J403
HEADPHONES
R415
100
C414
0.22
(ML)
STAND
-BY
VCC
NF
OUTPUT
NF
FILTER
GND
OUTPUT
IC401
BA5415
POWER AMP.
16
R403
1K
R414
1K
R413
1K
C416
1000/16
C415
1000/16
C419
2200/25
R406
1K
R405
1K
Q402
9014 C
Q401
9014 C
C405
4.7/50
C406
4.7/50
R408
33K
R407
33K
C408
0.001
C407
0.001
R410
180
C418
22/25
C417
47/25
R409
180
C409
100/10
C410
100/10
10
11
12
2
3
5
4
8
9
7
+B
+B
+B
+B
R510
56K
+B
AC220V-230V
50 Hz
BATTERIES
DC12V [ “D” size (UM/SUM-1,
R20 or HP-2) battery x 8]
2
1
T601
POWER
TRANSFORMER
SO601
AC POWER INPUT
SOCKET
D604
1N5392
D602
1N5392
D601
1N5392
C602
0.02
C604
0.02
C601
0.02
C603
0.02
D603
1N5392
F601
T1.25A
L 250V
SW401 :
FUNCTION
SELECTOR
R181
22K
C29
0.0015
(S)
VCO
R14
820
R20
470
VR1
R17
2.7K
6
5
432
CNP201
1
R182
22K
8
7
6
5
4
3
2
CNP501
1
C507
100/25
R509
6.8K
R508
470
Q504
8555 D
L501
22µH
PIN
NO.
8 9 10 11 12
7
Figure 13 SCHEMATIC DIAGRAM (2/2)
– 13 –
Page 4
WQ-730H
Writer and Editor: Quality & Reliability Control Center of Communication & Audio System Group, Sharp Corp.
A9611-6073NS·IS·C
Printed in U.K.
SG • SK
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