Table of Contents
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MIC
PAUSE
STOP/EJECT
F.FWD
REWIND
PLAY
PLAY/
PAUSE
POWER
FM ST
DOWN/
F.REVERSE
PROGRAM
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 CIRCUITS ................................................................................................................................... 22
TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 24
FUNCTION TABLE OF IC ............................................................................................................................................... 29
PARTS GUIDE/EXPLODED VIEW
SHARP CORPORATION
SERVICE MANUAL
PORTABLE CD STEREO SYSTEM
RANDOM
RECORD
MODEL
STOP
UP/
F.FORWARD
REPEAT
CONTENTS
QT-CD700W
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
QT-CD700W
Page
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Summary of Contents for Sharp QT-CD700W
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Page 1: Table Of Contents
QT-CD700W SERVICE MANUAL PORTABLE CD STEREO SYSTEM QT-CD700W RANDOM RECORD PAUSE STOP/EJECT F.FWD REWIND PLAY MODEL PLAY/ STOP PAUSE POWER FM ST DOWN/ F.FORWARD F.REVERSE PROGRAM REPEAT • In the interests of user-safety the set should be restored to its original condition and only parts identical to those specified be used. -
Page 2: Ac Power Supply Cord And Ac Plug Adaptor
QT-CD700W SAFETY PRECAUTION FOR SERVICE MANUAL This product is classified as a CLASS 1 LASER PRODUCT. WARNINGS: The AEL (Accessible Emission Level) of Laser Power Output for this model is specified to be lower than Class I Requirements. However, the following precautions must be observed during servicing to protect your eyes against exposure to the Laser beam. -
Page 3: Specifications
QT-CD700W CHAPTER . FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL. SPECIFICATIONS QT-CD700W General ■ Power source AC 110-127/220-240 V, 50/60 Hz DC 12 V ["C" size (UM/SUM-2, R14) battery x 8 ]... -
Page 4: Names Of Parts
QT-CD700W Names of parts Function Switch 6 7 8 Volume Control (Tape) Pause Button (Tape) Stop/Eject Button (Tape) F.Forward Button (Tape) Rewind Button (Tape) Play Button (Tape) Record Button CD Compartment 10. Tuning Control 11. Band Selector 12. (CD) Random Button 13. -
Page 5: Fitting Of Dial Pointer
QT-CD700W FITTING OF DIAL POINTER Setting method of dial pointer 1) Remove the front cabinet. 2) Remove 3 pcs screws (S06) φ3 x 10 PA from tuning bracket (bottom of PWB board/pattern side), and remove 1 pc screw (S14) φ2.6 x 10 PH from tuning bracket/CD compartment’s flange (with fitting between CD compartment and tuning bracket). -
Page 6: Operation Manual
QT-CD700W OPERATION MANUAL Preparation for use ■ ■ Operation with batteries Turning the power AC110-127/220-240 V, ON and setting to 50/60 Hz the STAND-BY mode To AC INPUT ● 8 "C" size batteries (UM/SUM-2, R14) To an AC socket ● Batteries are not included. -
Page 7: Disassembly
QT-CD700W DISASSEMBLY 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. - Page 8 QT-CD700W CD DOOR TOP CABINET (S14)X1 2.6X10PH FUNCTION KNOB BKT BAND KNOB (S05)X1 (S12)X1 3X8mm 3X8PA BAND KNOB BKT (S05)X1 3X8PWH DOOR LATCH SWITCH CD MECHANISM RUBBER CUSHION X4 (S11)X4 2.6X12PWA MAIN PCB ASS'Y VOLUME KNOB BRACKET TUNING BRACKET (S02)X1 2.6X5PH...
- Page 9 QT-CD700W The wire arrangement of AC Input Socket, Voltage Selector & Power Transformer. Screw VOLTAGE SELECTOR Center Terminal screw Right Terminal (S13)x2 3x12PA screw (S06)x2 3x10PA POWER TRANSFORMER AC INPUT Left Right terminal Terminal SOCKET screw Left Terminal To PWB Board...
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Page 10: Adjustment
QT-CD700W ADJUSTMENT MECHANISM SECTION TUNER SECTION fL : Low-range frequency Torque Specified Value fL : High-range frequency Play: TW-2412 Over: 80g FM IF /RF Torque Check Specified Value/ Instrument Test Stage Torque Meter Specified Value Adjusting Point Connection Play TW-2111 30 to 60g.cm... - Page 11 QT-CD700W BIAS OSC t101 TAPE LEAF SW MOTOR M601 TAPE MECHANISM Variable resistor in motor Figuer 11 ADJUSTMENT POINTS...
- Page 12 QT-CD700W CD SECTION Since this CD system incorporates the following automatic adjustment function, when the pickup is replaced, it is not necessary tp readjust it. Since this CD unit does not need adjustment, the combination of PWB and laser pickup unit is not restricted.
- Page 13 QT-CD700W C610 Q502 C108A C104 IC201A CN124A C133A E C B D506 CD DOOR 9 10 11 12 D505 CN503A CN5A CN502B OPEN/CLOSE SW810 PLAY C5O4A CD LID Figure 13-1...
- Page 14 QT-CD700W SETTING METHOD FOR LASER LIGHT UP 1. In power OFF state, set the Function switch to ON, keeping to be pressed the "Stop" and "RANDOM" button at same time. After CD initialize finish, The CD TEST mode is set, and the LCD indicate to the total tracks of the disc .
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Page 15: Notes On Schematic Diagram
QT-CD700W NOTES ON SCHEMATIC DIAGRAM 1. Tuner • Resistor: ): AM mode To differentiate the units of resistors, such symbol as K and M are used: the symbol K means 1000 ohm and the symbol M means : FM mode 1000 kohm and the resistor without any symbol is ohm-type 2. - Page 16 QT-CD700W L303 L301 T301 AM BAR MAIN PWB-A1 3T5/4.5MM FM ANT FM OSC 2T5/5MM AM OSC ANTENNA R312 VC1C VC1D C305 C302 C324 0.1U C316 IC1 TA2111N 130P C301 VC1A VC1B C307 R308 VOLTAGE(V) VOLTAGE(V) (0.8)0V (1.25V)1.24V (1.25V)1.26V C303 (4.28V)4.52V (0.48V)1.37V...
- Page 17 QT-CD700W FM SIGNAL AM SIGNAL C521 R511 C511 CD SIGNAL 104(M) C404 C524 PLAYBACK SIGNAL 470P 1000U/25V C508 VR1A 100U RADIO-LCH C514 RECORD SIGNAL C502 470u R403 C506 9014 C403 RADIO-RCH 100u 104M HEADPHONES 0.17 R601 R602 YD8227 PHONE 1 0.14V...
- Page 18 QT-CD700W RFRPRFM C123A 150P 1UF/50 TZCRFM 100K 100K C121A 2200P 3.3M C107 C108A 100UF 0.61V R122A C122A 100P 2SC1740S L101A 10uH R102A C124A 1UF/50V R105A C101A R103A 100UF/10 100K C125A C105A C104 Q101A 1.81V 100UF/10 2SA933 C102A R104A 470UF/10 AVDD1...
- Page 19 QT-CD700W C306 R302A R304A CD-RCH 4.7UF/50V R306A C128A C127A R301A 100UF/10 R303A C305A 4.7UF/50V CD-LCH 16.9344M R305A C131A C132A AMUTE 3.27V 3.29V Q301 R120A 1M C138 DTA124ESA IC201A BU24530-9A -0.8V PIN NO VOLTAGE(V) PIN NO VOLTAGE(V) PIN NO VOLTAGE(V) 3.32 1.82...
- Page 20 QT-CD700W BATTERY AC INPUT SOCKET SO651 AC-2 GND3 GND1 C201 1 2 3 4 D204 C512 SW651 C202 C205 C524 CN6A 1 2 3 4 BAT+ AC-1 AC22 C510 AC11 SPK401 L-CH T501 POWER VOLTAGE SELECT TRANSFORMER SPK403 AC220-240V AC110-127V...
- Page 21 QT-CD700W BLACK BROWN CD MECHANISM DECK PICKUP UNIT ORANGER SPINDLE MOTOR M702 YELLOW GREEN SW702 PICKUP IN BLUE VIOLET GRAY WHITE CNP803 M701 SLED MOTOR FM ROD ANTENNA Q601 FM-ANT FM-ANT1 CN7A 2 3 4 Q602 C512 C118 T301 C150...
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Page 22: Waveforms Of Cd Circuits
QT-CD700W WAVEFORMS OF CD CIRCUIT 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... - Page 23 QT-CD700W AVDD1 DVDD RESETB PWC/W_REMOTE VBIAS P11/SYNC IC201A P10/PLAY BU24530-9A P03/PRO_LED AGND1 P02/MMUTE P01/LID P00/INNER SEG6/AMUTE CCOM1/SEG5 COM0/SEG4 SEG./3 SEGG/2 SEGF/1 SEGE/0 SEGD/COM3 The numbers 1 to 8 are waveform numbers shown in pages 22.
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Page 24: Troubleshooting (Cd Section)
QT-CD700W TROUBLESHOOTING (CD SECTION) When the CD does not function The CD section may not operate when the objective lens of the optical pickup is dirty. Clean the objective lens, and check the playback operation. When this section does not operate even after the above step is taken, check the following items. - Page 25 QT-CD700W * The CD function will not work. The CD operating keys don't work. Check the power supply, 16.93 MHz clock , and reset terminal. Check the pickup-in limit switch position. Check the Focus system. * Laser failure IC +3.3V applied to the emitter of Q601.
- Page 26 QT-CD700W * Focus failure Does the optical pickup move up and down when the disc is Check as stated in item "FOCUS SERVO SAWTOOTH WAVE removed? FAILURE" Is the following waveform output at the pin 8 (FEN) of IC101A Check the periphery of IC101A and CN1. Is it normal?
- Page 27 QT-CD700W * Spindle motor IC101A when the function is changed to "PLAY" from Check the procedure in "HE ERROR". "STOP"? If OK. IC101A is faulty. Check the PWB pattern between pin 24 (CLVOUT) of IC101A and Is above wave obtained between pins 1 and 2 of IC601? pins 5 and 6 of IC601.
- Page 28 QT-CD700W * Slide motor operation failure. Is following slide feed signal output the pin 23 (SDOUT) of IC101A is faulty. IC101A when UP/DOWN key is pressed after the CD TEST MODE is set? SDOUT Is following slide feed signal input the pins 12 and 13 IC601...
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Page 29: Function Table Of Ic
QT-CD700W FUNCTION TABLE OF IC201A Terminal Terminal Analog/ Equivalent Function Name Digital circuit AVDDI Analog Analog power terminal for RF system Analog A+C voltage input terminal from pickup Analog B+D voltage input terminal from pickup VBIAS Analog Bias level (VDD/2) output terminal... - Page 30 QT-CD700W Terminal Terminal Analog/ Equivalent Function Name Digital circuit Digital X'tal 16.9344MHz connecting (input) terminal Digital X'tal 16.9344MHz connecting terminal DGND Digital Digital GND terminal AVDD3 Digital Audio system analog power terminal LDACO Analog Audio Lch output terminal VCDAC Analog...
- Page 31 "HOW TO ORDER REPLACEMENT PARTS" To have your order filled promptly and correctly, please furnish the For U.S.A. only following information. Contact your nearest SHARP Parts Distributor to order. 1. MODEL NUMBER 2. REF. No. 3. PART NO. 4. DESCRIPTION For location of SHARP Parts Distributor, Please call Toll-Free;...
- Page 32 QT-CD700W PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [1] CAPACITORS 92L27500105070 1UF +/-20% 50V 5 X 11 92L27100203008 0.02uF 0805 +80% -20% 50V 92L27500107020 100UF +/-20% 10V 5 X 11 92L27500227040 220UF ±20% 16V 6.3 X 11 92L27500107040 100UF ±20% 16V 5 X 11 92L27500107050 100UF +/-20% 25V 6.3 X 11...
- Page 33 QT-CD700W PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [1] CAPACITORS C503 92L27500105070 1UF +/-20% 50V 5 X 11 C503A 92L27100104106 0.1UF 0603 +/-10% 25V C504 92L27100102106 0.001UF 0603 +/-10% 50V C505 92L27500476040 47UF ±20% 16V 5 X 11 C505A 92L27100104106 0.1UF 0603 +/-10% 25V...
- Page 34 QT-CD700W PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [8] INTEGRATED CIRCUITS 92L28402111001 TA2111N HaiWei 92L28408227020 YD8227 HDIP12 IC101 92L28403308000 BA3308 IC201A 92L28424530000 BU24530-9A IC601 92L28405826000 BA5826FP [9] VIBRATOR X101 92L23400209000 16.93MHz MIDAS [10] OTHER CIRCUITRY PARTS B "- "...
- Page 35 QT-CD700W [11] CABINET PARTS PCB-A2 PCB-A4 PCB-A3 PCB-A1 Note: Only the unit and consumale parts are supplied as parts supply for the Tape mechanism.
- Page 36 QT-CD700W PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [11] CABINET PARTS 92L90007041300 CASSETTE DOOR ASSEMBLY 92L62618070010 CASSETTE DOOR BRACKET 92L54108070000 CASSETTE DOOR SPRING 92L62629060010 DAMPER GEAR BRACKET 92L80439060010 DAMPER GEAR 92L90007041000 FRONT CABINET ASSEMBLY (Without Mic Cushion) 92L80237040011 VOLUME KNOB...
- Page 37 QT-CD700W PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [12] ACCESSORIES / PACKING PARTS 92L13508070020 POLYFOAM (R) 92L20707041010 PICK UP PROTECTIVE CARD 92L19407041010 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...
- Page 38 QT-CD700W © COPYRIGHT 2004 BY SHARP CORPORATION ALL RIGHTS RESERVED. 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.