Sharp WQ-790W Service Manual Download Page 11

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WQ-790W

– 10 –

Figure 10 WIRING SIDE OF P.W.BOARD (1/3)

D125

D120

D115

D110

D105

D104

D108

D103

D102

D101

R603

R602

R601

R610

R611

C145

C144

D113

R615

D114

D109

D119

R619

R614

R613

R607

R606

D107

D106

R618

R617

R622

R621

C153

R616

R612

C147

C148

C151

C142

C141

C140

C143

IC108

R167

R169

R164

R163

R156

R159

R160

R158

R173

R171

R175

R177

C154

IC101

IC102

IC103

IC104

IC105

C150

R636

R638

D134

1 2 3 4 5 6 7

R152

R137

R112

R111

R116

R118

R122

R117

R123

D131

R155

Q107

Q106

C191

CN207

SPECTRUM
ANALYZER

R627

D127

R180

Q103

C180

R628

D132

D128

D135

C134

C133

R150

R650

R642

C181

C182

C183

C184

R184

C185

R643

R629

R651

D129

D133

IC106

R144

R142

R644

R106

R110

R141

R641

C127

R632

R631

C177

C125

C116

C118

Q101

Q102

C176

R135

C124

C105

VR102

VR101

R645

C105

C108

C110

C107

C111

C114

C109

C112

VR103

VR104

R124

C120

R136

R138

C102

C103

C126

C122

R130

R103

CN205

R101

R102

R104

R191

VR105

R134

R129

C113

R132

R131

R133

R127

C119

C121

R128

R107

R115

R114

R120

R121

R126

R125

R119

R113

R108

R109

C115

C117

R176

C128

C123

R148

C129

R145

C106

7
6

R143

C130

R183

D136

R182

R181

C135

R154

C138

R153

R165

R168

C152

R172

R147

IC107

C132

R149

R146

C131

C155

C149

C146

R151

R640

D126

D130

C139

R157

R637

R626

R623

D121

D122

D116

D111

D117

D112

D118

D124

R625

R620

R624

R609

R605

R608

R604

D123

CNH102

R472

C472

C474

VR401

C471

C473

E B C

C
B
E

E
B
C

VOLUME PWB-B1

E C B

GRAPHIC EQUALIZER PWB-B2

TAPE 1

TAPE 2

M501

TAPE MOTOR

A B + -

SP2

FULL-RANGE

SP4

SURROUND

L-CH

SP1

FULL-RANGE

SP3

SURROUND

R-CH

CNH106

TAPE MECHANISM

GND

RECORD/PLAYBACK

HEAD(300-4)

ERASE HEAD(300-5)

CNS1

WH
WH

GR
GR

BL
BL

RD
BK

YL
PK

SW502

TAPE1 MAIN

SW503

TAPE2 PLAY

SW501

TAPE2 MAIN

PLAYBACK

HEAD (300-6)

CNS2

CNH107

SW504

TAPE2

DIRECTION

B R

COLOR

TABLE

R D ( R )

O R

Y L

G R

B L

V L

G Y

W H ( W )

B K

P K

BROWN

RED

ORANGE YELLOW GREEN

BLUE

VIOLET

GRAY

WHITE

BLACK

PINK

VOLUME

R471

1 2 3 4 5 6

HEAD

FLEXIBLE PWB

3
2
1

VR102~VR105

GRAPHIC EQUALIZER

10KHz

3.3KHz

1KHz

330Hz

VR101

X-BASS

Summary of Contents for WQ-790W

Page 1: ...prior notice General Power source AC 110 127 V 220 240 V 50 60 Hz DC 15 V D size UM SUM 1 R20 or HP 2 battery 10 Power consumption 20 W Output power PMPO 120 W 60 W 60 W AC operation MPO Max 30 W 15 W 15 W AC operation RMS 15 W 7 5 W 7 5 W DC operation 10 T H D Speakers 12 cm 4 3 4 free edge speaker 2 5 cm 2 surround speaker 2 Input terminal MIC 1 2 1 mV 600 ohms CD LINE 350 mV 47 kohms Output ter...

Page 2: ... Slide the AC power supply socket to the visible indication of the side of your local voltage 1 Remove the main PWB Attach the dial pointer as shown arrow on the front cabinet putting it into the section indicated by arrow 2 Install the main PWB in the front cabinet and secure it with the four screws 3 Turn the tuning control knob in the direction indicated by Set the dial pointer to point 0 and t...

Page 3: ...ll Range Speaker 15 Surround Speaker 16 Mixing Microphone Sockets 17 Mixing Microphone Volume Control 18 Surround On Off Switch 19 Surround Mode Select Switch 20 Function Selector Switch 21 Surround Mode Indicators 22 Band Selector Switch 23 Tuning Control 24 Fine Tuning Control 25 Spectrum Analyzer 26 FM Stereo Indicator 27 Power TAPE 2 Play Direction Indicators 28 Built in Microphone 29 Dubbing ...

Page 4: ...E FIGURE 1 Front Cabinet 1 Battery Compartment Lid 4 1 Rear Cabinet A1 x1 2 Screw A2 x1 3 Screw A3 x8 4 Socket A4 x1 2 Tape mechanism 1 Screw B1 x2 4 2 2 Socket B2 x4 3 Open the cassette holder 4 Screw B3 x6 3 Main PWB 1 Knob C1 x1 4 2 2 Screw C2 x4 3 Socket C3 x5 4 Graphic Equalizer 1 Screw D1 x5 4 3 PWB 5 Volume PWB 1 Knob E1 x1 4 3 2 Screw E2 x2 3 Screw E3 x1 6 Power PWB 1 Screw F1 x1 4 4 2 Bra...

Page 5: ...ent Point Specified value Instrument Connection Adjustment Point VCO Frequency Note After preparing the test circuit shown in Fig 5 connect the Pin 13 Pin 21 and ground of the IC202 with the test circuit and measure the value FM IF RF Specified Value Adjusting Point Test Stage IF T201 Input FM Antenna Detection T202 Output Pin 9 of IC202 Band fL L202 Input Antenna Coverage fH TC202 Output Headphon...

Page 6: ...improvement without prior notice Parts marked with are important for maintaining the safety of the set Be sure to replace these parts with specified ones for maintaining the safety and performance of the set REF NO DESCRIPTION SW201 BAND SELECTOR FM SW301 BEAT CANCEL C SW302 RECORD PLAYBACK PLAYBACK SW401 SURROUND MODE LIVE SELECT SW402 SURROUND ON OFF OFF SW403 DUBBING SPEED HIGH FM STEREO BUILT ...

Page 7: ...improvement without prior notice Parts marked with are important for maintaining the safety of the set Be sure to replace these parts with specified ones for maintaining the safety and performance of the set REF NO DESCRIPTION SW201 BAND SELECTOR FM SW301 BEAT CANCEL C SW302 RECORD PLAYBACK PLAYBACK SW401 SURROUND MODE LIVE SELECT SW402 SURROUND ON OFF OFF SW403 DUBBING SPEED HIGH FM STEREO BUILT ...

Page 8: ... 14 5V 14 5V 14 5V 0 01V 0 01V 0 01V 1 1V 1 1V 1 1V 7 6V 7 6V 7 6V 0 6V 0 6V 0 6V 13 6V 13 6V 13 6V 0V 0V 0V 15V 15V 15V 13 7V 13 7V 13 7V 0 6V 0 6V 0 6V 1 2 3 4 5 6 7 8 9 10 7 6V 7 6V 7 6V 1 1V 1 1V 1 1V 0 01V 0 01V 0 01V 0V 0V 0V 11 12 13 14 IC401 BA4558 Ope Amp PIN RADIO TAPE PLAY TAPE REC PIN RADIO TAPE PLAY TAPE REC PIN RADIO TAPE PLAY TAPE REC PIN RADIO TAPE PLAY TAPE REC 3 3V 3 3V 3 3V 3 3V...

Page 9: ...PEED CONTROL R508 10K R510 10K R512 10K R240 150K C260 1 50 SW404 C R241 150K L203 L204 L205 SW2 OSC C235 10P CH TC203 C236 5P CH TC204 C237 5P CH TC205 SW201 G C238 360P C239 0 0022 C240 0 0047 R223 47 R222 47 C242 0 022 R220 220 VR202 5K B FINE TUNING C241 3P CH VC204 AC BIAS CIRCUIT C210 10 16 R203 22K C311 0 0082 ML C313 4 7 50 R249 18K R250 18K C314 4 7 50 R314 22K C312 0 0082 ML C315 330P R3...

Page 10: ...L C469 220 16 D401 1N4001 C437 470 25 C426 100 16 C425 100 16 C424 0 0015 ML C423 0 0015 ML C422 1 50 Q402 9014 C POWER MUTE Q401 9014 C POWER MUTE C421 1 50 R421 10K R442 10K R441 10K R420 10K F1 C429 100 16 C433 1000 10 C434 1000 10 C432 0 18 ML C431 0 18 ML J1 HEADPHONES C440 10 16 R440 27K Q501 8050 C VOLTAGE REGULATOR R501 4 7 D518 1N4148 FUSE RESISTOR FUSIBLE D305 1N4148 D525 1N4148 Q506 2SB...

Page 11: ... 1 0 8 R 1 0 9 C 1 1 5 C117 R176 C128 C123 R148 C129 R145 C106 8 1 2 3 1 2 3 7 6 8 7 6 5 5 4 4 8 1 2 3 7 6 5 4 R143 C130 R183 D136 R182 R181 C135 R154 C138 R153 R165 R168 C152 R172 R147 IC107 C132 R149 R146 C131 C155 C149 C146 R151 R640 D126 D130 C139 R157 R637 R626 R623 D121 D122 D116 D111 D117 D112 D118 D124 R625 R620 R624 R609 R605 R608 R604 D123 CNH102 R472 C472 C474 VR401 C471 C473 E B C C B ...

Page 12: ...C415 C408 C411 C409 SW401 C469 C422 C432 C431 C429 C437 C433 C355 Q501 E B C C508 C505 C507 C530 C319 C309 C305 C307 C516 R311 R307 R309 R336 C363 C365 C364 C366 D505 CN4 R345 CN2 R548 D518 D522 R501 R502 C352 C351 C354 Q301 T301 C356 C357 SW301 R332 C522 C430 D401 C427 C424 Q402 Q401 C421 C425 C428 C426 C423 C434 IC402 R562 C459 C450 CNS106 C263 C258 C529 D201 D526 C229 T203 C228 C227 C225 CF203 ...

Page 13: ...VR105 A VR105 B 330Hz 1kHz 3 3kHz 10kHz GRAPHIC EQUALIZER C103 470 16 C102 0 1 C106 0 022 R644 68K R103 560 VR101 A 50K B R106 12K R110 18K C108 0 01 R112 8 2K VR102 A 100K B R114 8 2K R116 5 6K R120 4 7K C110 0 0068 ML R118 4 7K VR103 A 100K B R122 2 2K C112 0 0022 ML R124 3 3K VR104 A 100K B R126 3 3K R128 1 5K C114 100P R132 820 R134 1K VR105 A 100K B R130 820 ML C124 1 50 C116 0 022 ML C118 0 ...

Page 14: ...16 R167 82K D115 R615 47 R614 47 D114 D113 D112 D111 R611 47 R612 47 R613 47 D106 D107 D108 D109 R608 47 R607 47 R606 47 R610 47 R609 47 D110 R163 82K C144 10 16 C142 1 50 R165 8 2K C146 1 50 R164 100 D101 D102 D103 D104 R604 47 R603 47 R602 47 R601 47 R605 47 D105 R160 82K C143 10 16 C141 10 16 C145 10 16 R159 8 2K R158 100 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 IC105 AN6884 9 1 2 3 ...

Page 15: ...BK BK BK WH WH CNH110 CNS110 TO MAIN PWB SW505 VOLTAGE SELECTOR AC220 240V AC110 127V T501 POWER TRANSFORMER 280 281 279 BATTERYS DC15V D SIZE UM SUM 1 R20 or HP2 battery X10 POWER PWB C BL SO501 AC POWER INLET SOCKET AC110V 127V 50 60Hz AC220V 240V 50 60Hz BR COLOR TABLE RD R OR YL GR BL VL GY WH W BK PK BROWN RED ORANGE YELLOW GREEN BLUE VIOLET GRAY WHITE BLACK PINK ...

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