Sharp QT-CD700W Service Manual Download Page 19

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QT-CD700W

Figure 18 SCHEMATIC DIAGRAM (4/4)

C126A 1UF/50V

R128A

220

R505A 10K

C502A

104

L202

100uH

C133A

100UF/10

104

C134A

C128A

104

C132A

15P

R302A

C306

4.7UF/50V

R306A

560

R305A

560

CD-RCH

CD-LCH

CN8

CN5

CN9B

PLAY

RANDOM

STOP

REPEAT

PROG

R515A 10K

R514A 4K7

R513A 3.3K

R512A 2K7

R51

1K8

CN9A

CN5A

C305A

4.7UF/50V

R304A

2K7

R303A

2K7

R24

AMUTE

3.29V

-0.8V

0.66V

REC-SYN

FMST-

FMST+

-0.8V

3.27V

R16

9014

R15

10K

R14

10K

R13

10K

OPEN/CLOSE

LEAF SW

SW810

LED1

C505A

104

R301A

C301A 560P

C302A 560P

C304A 560P

C303A 560P

Q301

DTA124ESA

C138

104

C131A

15P

C127A

100UF/10

16.9344M

R120A 1M

R540

OPEN

C503A

104

R506A

10K

R507A

10K

R508A

1K8

R531

R529

104

C508A

LCD DISPLAY

0 0

LCD 1

CD CONTROL PWB-A3

MAIN PWB-A1

CN4B

CN4A

R541

OPEN

R542

OPEN

R543

OPEN

R545

470K

R546

470K

R547

470K

VDD

4.7

R503A

1N4148

48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33

DVDD

RESETB

PWC/W_REMOTE

P11/SYNC

P10/PLAY

P03/PRO_LED

P02/MMUTE

P01/LID

P00/INNER

SEG6/AMUTE

CCOM1/SEG5

COM0/SEG4

SEG./3

SEGG/2

SEGF/1
SEGE/0

ADC1/KEY

CLK88

LON

SEGA/COM0

SEGB/COM1

SEGC/COM2 SEGD/COM3

RDAC0

VCDAC

LDAC0

DGND

COM0

COM1

COM2

COM3

SEG0

SEG1

SEG2

SEG3

SEG4

SEG5

A00

A01

A02

A03

A04

A05

A06

A07

A08

A09

A00

A01

A02

A03

A09

A08

A07

A06

A05

A04

IC201A BU24530-9A

VOLTAGE(V)

PIN NO

3.32

1.72

1
2
3
4
5

6
7
8
9

10
11
12
13
14

1.66
2.58

2.27
1.67

1.66
1.71
1.71

1.66

1.03
0.20

15
16
17
18
19
20
21
22
23
24

1.63
0.65

1.67
1.64

3.33
1.66

VOLTAGE(V)

PIN NO

1.61

1.56

49
50
51
52
53
54
55
56
57
58
59
60
61
62

1.65
0.42

0.77
0.77

3.32
1.66
1.67

1.85

1.66
1.67

63
64

1.66
1.62

1.53

1.65
1.67

VOLTAGE(V)

PIN NO

1.82

1.66

3.32

25
26
27
28
29
30
31
32
33
34
35
36
37
38

1.60
1.60

1.54
1.57

3.39
1.49
1.46
1.46
1.46

1.63
1.63

39
40
41
42
43
44
45
46
47
48

3.30
3.31

3.32
3.32

3.29
3.30
0.94
0.06

0.02

Summary of Contents for QT-CD700W

Page 1: ...riginal condition and only parts identical to those specified be used PAUSE STOP EJECT STOP F FWD UP F FORWARD REWIND PLAY RECORD REPEAT PLAY PAUSE MIC DOWN F REVERSE PROGRAM POWER FM ST RANDOM Page AC POWER SUPPLY CORD AND AC PLUG ADAPTOR 2 SPECIFICATIONS 3 NAMES OF PARTS 4 FITTING OF DIAL POINTER 5 OPERATION MANUAL 6 DISASSEMBLY 7 ADJUSTMENT 10 NOTES ON SCHEMATIC DIAGRAM 15 WAVEFORMS OF CD CIRCU...

Page 2: ...ition outer than the lead in position the Laser will light for several seconds to detect a disc So not look into the Pickup Lens 2 The Laser Power Output of the Pickup inside the unit and replacement service parts have already been adjusted prior to shipping 3 No adjustment to the Laser Power should be attempted when replacing or servicing the Pickup 4 Under no circumstances look directly into the...

Page 3: ...mm 6 Depth 213 mm 8 3 8 Weight 2 1 kg 4 6 lbs without batteries Radio Frequency range FM 88 108 MHz AM 526 5 1 606 5 kHz Tape recorder Frequency response 60 12 000 Hz Normal tape Signal noise ratio 40 dB Wow and flutter 0 3 WRMS Motor DC 9 V electric governor Bias system AC bias Erase system Magnet erase Compact disc player Type Compact disc Signal readout Non contact 3 beam semiconductor laser pi...

Page 4: ...ompartment 10 Tuning Control 11 Band Selector 12 CD Random Button 13 CD Stop Button 14 CD Track Up F Forward Button 15 CD Repeat Button 16 Cassette Compartment 17 LCD Display 18 CD Program Button 19 CD Track Down F Reverse Button 20 CD Play Pause Button 21 Built In Microphone 22 FM Aerial 23 Battery Compartment 24 Earphone socket 25 AC Voltage Selector 26 AC Input Socket 27 Beat Cut Switch 23 24 2...

Page 5: ...move dial pointer 4 Insert dial pointer from A direction to tuning bracket then engages the dial pointer s guide hook into tuning control s slot properly B Ensure tuning control s pin located on adjustment portion of tuning bracket 5 Reassemble the screws and front cabinet Dial Pointer Dial Pointer Main PWB Main PWB Variable Capacitor Variable Capacitor Tuning Knob A Tuning Knob Tuning Knob Tuning...

Page 6: ...e not included Turning the power ON and setting to the STAND BY mode Operation with batteries 1 1 2 3 1 2 3 2 3 4 5 1 2 3 4 5 PLAY PAUSE AC110 127 220 240 V 50 60 Hz To an AC socket To AC INPUT FUNCTION TAPE STAND BY CD RADIO FUNCTION TAPE STAND BY CD RADIO FUNCTION TAPE STAND BY CD RADIO AM FM FM ST FUNCTION TAPE STAND BY CD RADIO FUNCTION TAPE STAND BY CD RADIO PLAY PAUSE PLAY RECORD TUNING ...

Page 7: ...PA S06 4 φ3 10PA TAPE MECHANISM S04X6 CD CONTROL PCB ASS Y OPEN CASSETTE HOLDER Caution On Disassembly Follow the below mentioned notes when disassembling the unit and reassembling to keep it safe and ensure excellent performance 1 Take cassette tape and compact disc out of the unit 2 Be sure to remove the power supply plug from the wall outlet before starting to disassemble the unit 3 Take off ny...

Page 8: ...φ2 6X5PH TUNING KNOB S06 X7 φ3X10PA RUBBER CUSHION X4 VOLUME KNOB BRACKET S15 X1 M3X8PH BLACK S11 X4 φ2 6X12PWA S03 X1 φ3X8PH HANDLE TRANSFORMER S09 X2 φ3X20PWH AC POWER SOCKET S06 X2 φ3X10mm S13 X2 φ3X12PA S06X2 AC VOLTAGE SELECTOR COVER AC VOLTAGE SELECTOR NOTE After removing the connector for the optical pickup from the connector wrap the conductive aluminium foil around the front end of connec...

Page 9: ...angement of AC Input Socket Voltage Selector Power Transformer Please follow the instruction of wire arrangement to service or reinstall these critical parts 1 1 2 3 4 1 BLACK WIRE Connecting from Power Transformer black wire to AC Input Socket left terminal 2 RED WIRE Connecting from AC Input Socket right terminal to Voltage Selector center terminal 3 RED WIRE Connecting from Power Transformer re...

Page 10: ...e Stand by Adjustment point T101 Specified Value Instrument Connection 80KHz 6KHz Pin 1 CN103 TUNER SECTION fL Low range frequency fL High range frequency FM IF RF Test Stage Specified Value Adjusting Point Specified Value Adjusting Point Instrument Connection FM Band Coverage fL L301 fL C2 FM Tracking fL 90 MHz L303 fH 106 0 MHz C1 AM IF RF Test Stage AM IF AM Band Coverage AM Tracking Instrument...

Page 11: ...IC3 CN1 SW1 VR1 t101 BIAS OSC SW2 CN103 IC101 Figuer 11 ADJUSTMENT POINTS IC201A FM TRACKING FM ROD ANTENNA FM ANT ANT AM BAR AM ANTENNA AM IF T303 12 IC1 1 13 18 24 L303 T301 PVC1 L301 C3 C4 C1 C2 FL FH SW4 FL FH FM BAND COVERAGE FL FH AM TRACKING FL FH AM COVERAGE 1 2 3 4 A B C D E F G H 6 5 4 3 2 1 ...

Page 12: ...isc or not PREPARATION FOR LASER LIGHT UP 1 Before the laser light up CD DOOR switch SW810 terminals have to be short with the solder Resistor of 330ohm is put from 13 PIN of IC201A and you must connect it to GND of PWB Refer to PWB of Figure 13 1 Start While holding down the Stop and RANDOM button simultaneously move the FUNCTION switch to CD Note 1 When the CD DOOR switch is in the OFF position ...

Page 13: ... E C B 1 2 D3 D506 D2 C CN8 CN5 CD DOOR 1 2 4 5 6 7 8 9 10 11 12 OPEN CLOSE CD LID SW810 Q4 C5O4A C515 CN502B PLAY S4 Q5 C525 D505 CN503A RD BK 1 2 CN5A TP E C B D4 Q502 Q1 C126A 54 59 48 42 33 38 C133A 49 64 1 5 C108A C104 C610 10 GND 16 13 17 22 26 32 P19 IC201A CN124A ...

Page 14: ... PLAY button The CD TEST mode is set when the LCD indicate to 1 Then out the above circuit The laser is light up when LCD indicate to CD 1 In power OFF state set the Function switch to ON keeping to be pressed the Stop and RANDOM button at same time 2 In above TEST mode state press once the PLAY button 1 In above laser light up state adjust the variable resistor VR1A on pickup PWB to maximum laser...

Page 15: ...in each section is the one measured by Digital Multimeter between such a section and the chassis with no signal given 1 Tuner AM mode FM mode 2 CD Stop state Play mode 3 Deck section Stop state Schematic diagram and wiring side of P W Board for this model are subject to change for improvement without prior notice Parts marked with are important for maintaining the safety of the set Be sure to repl...

Page 16: ... 2 1 12 11 10 9 8 7 6 5 4 3 2 1 2 3 4 5 6 7 8 9 P R R P R P R P 4 75V 0 1V 0 68V 0 1V 0 1V 0 68V 0V 0V 0 6V R P R R109 2K2 R108 1K R129 15K R104 560 R105 560 C109 222 M C129 182M C130 1u R122 47 R121 120K C128 100u C106 100u C105 203 R17 100K C122 22U C126 47u C123 333 M R125 5k6 R141 2K2 C125 1u C124 1u C124 120K C142 200p R117 5k6 IC101 REC P B EQUALISER AMP BA3308 C141 200p R107 3K3 R314 300 C3...

Page 17: ...SOCKET AC100 127V 220 240V 60 50HZ SW651 AC INPUT AC DC SELECTOR BATTERY DC 12V UM 2 SIZE C R14 8 T501 S0651 220V 110V POWER TRANSFORMER R42 4K7 R40 560 CN6 L1 L3 CB1 22U CB2 22U SPK403 SPK404 L2 CN6A CN6A C506 100u C510 100u Q3 9014 C512 104 M IC3 YD8227 C503 1u IC3 POWER AMP YD8227 Q6 9014 R23 10k R22 10k C520 1u C401 104M R510 12K R401 3K VR1B C402 470P C507 10U R9 1k R5 4 7 R7 1K R8 47K C6 100...

Page 18: ...113 0 FE L101A 10uH C107 104 C108A 100UF C101A 100UF 10 Q101A 2SA933 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 VREF E COM D A VDD B C F GND LD VR MD F CN1 M702 SPINDLE MOTOR CNP803 CN2 SW702 M M LIMIT SWITCH CD 8V CD MOTOR PWB B M701 SLED MOTOR T T F 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Fouse Coil Tack Coil 16 IC601 BA5826FP VOLTAGE V VOLTAGE V PIN NO PIN NO 0 1 64 1 64 5 65 3 16 2 67 1 64 1 64 6 40 6...

Page 19: ...48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 DVDD RESETB PWC W_REMOTE P11 SYNC P10 PLAY P03 PRO_LED P02 MMUTE P01 LID P00 INNER SEG6 AMUTE CCOM1 SEG5 COM0 SEG4 SEG 3 SEGG 2 SEGF 1 SEGE 0 26 27 28 29 30 31 32 ADC1 KEY CLK88 LON SEGA COM0 SEGB COM1 SEGC COM2 SEGD COM3 55 54 53 52 51 50 49 RDAC0 VCDAC LDAC0 AVDD3 DGND X0 X1 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 COM0 COM1 C...

Page 20: ...106 1 2 3 4 1 2 3 4 1 2 1 2 1 2 3 4 1 2 3 4 C125 1 2 3 4 5 6 7 8 9 C130 C108 C131 Q101 C122 C102 Q102 C121 C128 R20 C136 C120 CN14 C132 IC101 GND VCCL SW PL B GND CN503B PR PR RL MUTE C123 BK WH WH WH WH BK CN15A CN7A CN103A RD WH WH BK BK BK RD RD WH BATTERY T501 L3 CN6 L2 L1 D504 Q504 Q503 C6 Q6 Q3 Q7 12 11 10 9 8 7 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 BR BK WH GY VI BL GR YL OR...

Page 21: ... 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 T303 C322 U1 C316 T301 BK BR RD OR YL GR BL VI GY WH BLACK BROWN RED ORANGER YELLOW GREEN BLUE VIOLET GRAY WHITE ANT CF303 Q505A C150 C118 C606 C608 C603 Q408 C102A Q7 D6 D8 D9A Q501 D3 C1 L101A C305A Q101A D506 D2 D5 C526 C101A Q301 CN8 X101 C127A CN5 L202 Q1 CD DOOR C126A 54 59 48 42 33 38 C133A 49 64 1 5 C108A CF3 SEG5 SEG4 SEG3 SEG2 SEG...

Page 22: ...FD PIN19 SLED PIN23 RF PIN64 FE PIN9 FD PIN19 SLED PIN23 FOCUS SEARCH_TOC READ RF PIN64 FE PIN9 FD PIN19 1 RF PIN64 OF IC 201A TE PIN60 OF IC 201A TD PIN21 OF IC 201A FE PIN9 OF IC 201A FD PIN19 OF IC 201A SLED PIN23 OF IC 201A CH_R PIN55 OF IC 201A CH_L PIN53 OF IC 201A TCD 782 TNO 02 PLAY BACK STOP PLAY STOP PLAY NO DISC FOCUS SEARCH DOOR CLOSE NO DISC FOCUS SEARCH POWER ON F FORWARD F FORWARD R...

Page 23: ...SETB PWC W_REMOTE P11 SYNC P10 PLAY P03 PRO_LED P02 MMUTE P01 LID P00 INNER SEG6 AMUTE CCOM1 SEG5 COM0 SEG4 SEG 3 SEGG 2 SEGF 1 SEGE 0 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 FC0 AGND2 FDOUT JUMP0 TDOUT SDIN SDOUT CLVOUT ADC0 GAIN_SEL ADC1 KEY CLK88 LON SEGA COM0 SEGB COM1 SEGC COM2 SEGD COM3 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 EQ0 RF1 CAGC TEN TE0 SC TZCRFM RFRPRFM AGND3 RDAC0...

Page 24: ...r disc Parts code UDSKA0004AFZZ Place the CD cleaner disc onto the CD disc tray with the brush side down then press the play button You will hear music for about 20 seconds and the CD player will automatically stop If it continuous to turn press the stop button 1 2 3 If the CD cleaner brushes become very wet then wipe off any excess fluid with a soft cloth Do not drink the cleaner fluid or allow i...

Page 25: ...llector of Q601 IC 3 3V applied to the pin 48 VDD of IC 201A Is approx 2 38V applied to the collector of Q101A Check CN1 If it is normal the optical pickup is faulty Check the peripheral parts of IC 201A If it is normal the optical pickup is faulty Check the PWB pattern between collector of Q601 and pin 48 of IC201A Check the peripheral parts of IC 601 and Q601 Check the PWB pattern or Q601 The CD...

Page 26: ...t normal Check as stated in item FOCUS SERVO SAWTOOTH WAVE FAILURE Is sawtooh wave output to the pin 19 FDOUT of IC101A Is 8V applied to the pins 21 and 22 VCC of IC601 CN1 connection failure or optical pickup failure Check the PWB pattern between CN1 and IC601 Check the PWB pattern of IC601 Check the PWB pattern of IC601 Is sawtooth wave obtained between pins 17 and 18 of IC601 Is sawtooth wave o...

Page 27: ... to the pins 61 TEN and 60 TEO of IC101A during track search in normal playback Is the following wave output to the pin 57 RFRPRFM and 58 TLCRFM of IC101A2 during track search in normal playback Check the PWB pattern between pin 60 TEO of IC101A and pins 61 TEN and 60 TEO of IC101A If OK IC101A failure IC101Afailure Check as stated in item SLIDE MOTOR OPERATION FAILURE Check the PWB pattern betwee...

Page 28: ... and 2 of IC601 Is slide feed voltage applied between both terminals of slide motor Check the CD mechanism periphery of slide motor If the slide motor does not run when DC2 0V is applied to both terminals of slide motor the slide motor is faulty Is following slide signal output the pin 23 SD OUT of IC101A during playback Slide motor operation failure Slide servo failure Normal IC101A is faulty IC1...

Page 29: ... bit input terminal 11 27 CLK88 Digital O Clock output terminal for driver IC 12 28 LON Digital O Laser ON control output terminal 12 29 P20 COM0 Digital I O 4 bit parallel output port LCD common output terminal 11 30 P21 COM1 Digital I O 4 bit parallel output port LCD common output terminal 11 31 P22 COM2 Digital I O 4 bit parallel output port LCD common output terminal 11 32 P23 COM3 Digital I O...

Page 30: ...ORFM Analog O C fitted terminal for RFRP 2 output terminal for RF test monitor 16 58 TZCRFM Analog O C fitted terminal for TZX 1 output terminal for RF test monitor 17 59 SC Analog I Scratch depth adjust resistor connecting terminal 18 60 TEI Analog O Tracking error output terminal 3 61 TEN Analog I Tracking erro to amplifier feedback input terminal 3 62 CAGC Analog I C fitted terminal for constan...

Page 31: ...anation of capacitors resistors parts codes Capacitors VCC Ceramic type VCK Ceramic type VCT Semiconductor type VC MF Cylindrical type without lead wire VC MN Cylindrical type without lead wire VC TV Square type without lead wire VC TQ Square type without lead wire VC CY Square type without lead wire VC CZ Square type without lead wire VC J The 13th character represents capacity difference J 5 K 1...

Page 32: ... 5 X 11 C127 C129 92L27600182220 AB 0 0018UF 10 100V C127A 2 92L27500107020 AB 100UF 20 10V 5 X 11 C128 92L27500107020 AB 100UF 20 10V 5 X 11 C128A 92L27100104106 AH 0 1UF 0603 10 25V C130 C132 92L27500105070 AB 1UF 20 50V 5 X 11 C130A 92L27100104106 AH 0 1UF 0603 10 25V C131A C132A 92L27100150106 AB 15P 0603 10 50V C133 92L27600182220 AB 0 0018UF 10 100V C133A 92L27500107020 AB 100UF 20 10V 5 X 1...

Page 33: ...16V 5x11mm NP CC5 92L27600103220 AB 0 01UF 10 100V 2 TRANSISTORS Q1 Q7 92L2830901403A AB PSS9014C Q101 Q102 92L2830901403A AB PSS9014C Q101A 92L28300933000 AD LOW SIGNAL 2SA933ASR Q103 92L28318050000 AC ZQT8050D Q301 92L28300124100 AD DTA124ESA Q406 Q407 92L2830901403A AB PSS9014C Q408 92L28300772010 AE B772 Q501 Q502 92L2830901403A AB PSS9014C Q503 92L28309015030 AC 9015C EBC Q504 92L28308050030 ...

Page 34: ... AE 28 L 253mm CN15 92L33625010412 AB 4 PIN WAFER P 2 5mm XH 4A RED CN103 92L33625010420 AB 4 PIN WAFER PITCH 2 5mm C XH 4W CN501 92L33522221102 AD 2 PIN HOUSING WIRE 22 UL1007 220mm P 2 5mm CN501B 92L33625010021 AB 2PIN WAFER PITCH 2 5mm S11 2W CN502A 92L33602210102 AA 2 PIN WAFER P 2mm PH 2A RED CN502B 92L33526181122 AC 2 PIN HOUSING WIRE UL1007 26 180mm 1HP 2 0mm CN503A 92L33526151120 AG 12 PIN...

Page 35: ...for the Tape mechanism 17 S02 18 17 19 54 55 53 22 26 26 51 57 42 41 39 40 31 32 33 34 35 37 38 36 10 43 52 45 12 11 8 59 58 4 5 44 7 6 58 3 2 1 8 9 30 21 25 24 27 23 28 29 50 49 48 47 46 14 56 1 6 15 13 20 10 S07 S06 S06 S15 S13 S06 S01 S06 S06 S09 S12 S05 S05 S04 S06 S11 S07 S14 S10 S08 S06 S03 PCB A1 PCB A3 PCB A4 PCB A2 9 ...

Page 36: ...M DOOR LATCH SWITCH ASSY 41 92L80247040011 AC BAND KNOB 42 92L62627040010 AD BAND KNOB BRACKET 43 92L60739080020 AD DUST COVER 44 92L1380902020C AD RUBBER CUSHION 45 92L1380902010C AD RUBBER CUSHION 46 92L80138070019 AC PAUSE KNOB 47 92L80158070019 AC STOP KNOB 48 92L80148070019 AC F FWD KNOB 49 92L80118070019 AC REWIND KNOB 50 92L80128070019 AC PLAY KNOB 51 92L80108070019 AC RECORD KNOB 52 92L560...

Page 37: ... 10 92L20707041010 AC PICK UP PROTECTIVE CARD 11 92L19407041010 AC POLYBAG SET 13 P C B ASSEMBLY Not Replacement Item PCB A1 92L23707041S00 MAIN PCB ASS Y PCB A3 92L23707041S10 CD CONTROL PCB ASS Y PCB A4 92L23707041S30 POWER PCB ASS Y PCB B2 92L23707041S20 R D PCB ASS Y 12 ACCESSORIES PACKING PARTS ...

Page 38: ...ED No part of this publication may be reproduced stored in a retrieval system or transmitted in any from or by any means electronic mechanical photocopying recording or otherwise without prior written permission of the publisher SHARP CORPORATION Printed in Malaysia ...

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