Sharp WQ-730H Schematic

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 –

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 –