Sharp QT-CD131H Service Manual
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Sharp QT-CD131H Service Manual

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Illustration: QT-CD132H
SAFETY PRECATION FOR SERVICE MANUAL .............................................................................................................. 2
IMPORTANT SERVICE NOTES (131H FOR UK ONLY) .................................................................................................. 3
SPECIFICATIONS ............................................................................................................................................................. 3
NAMES OF PARTS ........................................................................................................................................................... 4
DISASSEMBLY .................................................................................................................................................................. 5
REMOVING AND REINSTALLING THE MAIN PARTS ..................................................................................................... 6
ADJUSTMENT ................................................................................................................................................................... 7
BLOCK DIAGRAM ............................................................................................................................................................. 9
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD ............................................................................................. 12
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 21
TYPES OF TRANSISTOR ............................................................................................................................................... 21
WAVEFORMS OF CD CIRCUIT ...................................................................................................................................... 22
TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 23
FUNCTION TABLE OF IC ................................................................................................................................................ 26
PARTS GUIDE/EXPLODED VIEW
DIFFERENCE BETWEEN QT-CD131H AND QT-CD132H
SERVICE MANUAL
CONTENTS
QT-CD131H
SURROUND
SHARP CORPORATION
- 1 -
QT-CD131H
QT-CD132H
• 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.
• Note for users in UK
Recording and playback of any material may require consent
which SHARP is unable to give. Please refer particularly to the
provisions of Copyright Act 1956, the Dramatic and Musical
Prefomers Protection Act 1956, the Preformers Protection Acts
1963 and 1972 and to any subsequent statutory enactments and
orders.
QT-CD132H
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
QT-CD131H/132H
No. S8871QTCD131H
Page

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Summary of Contents for Sharp QT-CD131H

  • Page 1: Table Of Contents

    • Note for users in UK Recording and playback of any material may require consent which SHARP is unable to give. Please refer particularly to the provisions of Copyright Act 1956, the Dramatic and Musical Prefomers Protection Act 1956, the Preformers Protection Acts 1963 and 1972 and to any subsequent statutory enactments and orders.

  • Page 2: Safety Precation For Service Manual

    QT-CD131H/132H SAFETY PRECATION FOR Laser Diode Properties SERVICE MANUAL Material: GaAIAs Precaution to be taken when replacing and servicing the Wavelength: 780 nm Laser Pickup. Emission Duration: continuous Laser Output: max. 0.6 mW The ael (ACCESSIBLE EMMISSION LEVEL) of the laser power output is less than class 1 but the laser component is capable of emitting radiation exceeding the limit for class 1.

  • Page 3: Important Service Notes (131H For Uk Only)

    QT-CD131H/132H FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL. IMPORTANT SERVICE NOTES (131H FOR UK ONLY) Before returning the unit to the customer after completion of a repair or adjustment it is necessary for the following withstand voltage test to be applied to ensure the unit is safe for the customer to use.

  • Page 4: Names Of Parts

    QT-CD131H/132H NAMES OF PARTS 1. Cassette Compartment 2. CD Compartment 3. (TAPE) Record Button: 4. (TAPE) Play Button: 5. (TAPE) Rewind Button: 6. (TAPE) Fast Forward Button: 7. (TAPE) Stop/Eject Button: 8. (TAPE) Pause Button: 9. CD Eject Button 3 4 5 6 7 8 10 11 12 13 14 15 10.

  • Page 5: Disassembly

    QT-CD131H/132H DISASSEMBLY Caution on Disassembly Follow the below-mentioned notes when disassembling the unit and reassembling it, to keep it safe and ensure excellent Front Cabinet 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 6: Removing And Reinstalling The Main Parts

    QT-CD131H/132H Switch PWB (G2)x1 Tuner Display Front Cabinet Push Driver (D1)x2 ø3x12mm (G1)x2 ø3x10mm (D1)x1 Rear Cabinet ø3x10mm (G1)x1 ø3x10mm Figure 6-1 Terminal PWB (E1)x4 ø3x10mm (G1)x2 ø3x10mm Figure 6-3 Rear Cabinet (F1)x3 ø2.5x10mm Pull Tape Mechanism (C2)x2 (H1)x1 (H1)x1...

  • Page 7: Adjustment

    QT-CD131H/132H ADJUSTMENT TUNER SECTION MECHANISM SECTION fL: Low-range frequency • Driving Force Check fH: High-renge frequency Torque Meter Specified Value • FM RF PLAY: TW-2412 Over 120 g Signal generator: 1 kHz, 75 kHz dev., FM modulated • Torque Check...
  • Page 8 QT-CD131H/132H CD SECTION Since this CD system incorporates the following automatic adjustment function, when the pickup is replaced, it is necessary to reajust it. Since this CD unit does not need adjustment, the combination of PWB and laser pickup unit is not restricted.

  • Page 9: Block Diagram

    QT-CD131H/132H Figure 9 BLOCK DIAGRAM (1/3) – 9 –...
  • Page 10 QT-CD131H/132H Figure 10 BLOCK DIAGRAM (2/3) – 10 –...
  • Page 11 QT-CD131H/132H Figure 11 BLOCK DIAGRAM (3/3) – 11 –...

  • Page 12: Schematic Diagram / Wiring Side Of P.w.board

    QT-CD131H/132H LASER DRIVER Q805 S9012H R842 C848 C849 1/50 0.022 SWITCH PWB-A2 SW774 R771 SW773 3.9K R772 2.7K SW771 R773 PLAY 1.8K SW761 CD LID OPEN/CLOSE SW772 R774 R871 C850 1.5K STOP 63 62 61 60 59 58 57 56 55 545 3 5 2 51 50 49 4.7K...
  • Page 13 QT-CD131H/132H R801 C801 0.01 R860 C847 TR– FO– 0.01 TR– R871 C850 4.7K 6 4 6 3 62 61 60 59 58 57 56 55 54 53 52 51 50 49 PICKUP UNIT R858 C841 0.047 XL801 XVSS DEFI 16.93MHz...
  • Page 14 QT-CD131H/132H R167 4.7K C105 R104 TAPE R151 R153 R103 SW201-A 0.0018 5.6K 6.8K TUNER IC101:REC./P.B.EQUALIZER AMP. R121 R155 R105 C115 R165 C151 0.018(ML) 680K 0.027 R157 (ML) SW102-A R115 R113 R117 131H:47K R109 8.2K 3.9K 3.9K R102 R101 C113 132H:56K...
  • Page 15 QT-CD131H/132H HEADPHONES PWB-A4 MAIN PWB-A1(2/3) R227 R228 131H ONLY SW202 132H SURROUND ONLY J201 HEADPHONES R167 4.7K IC201-1 KIA4558S FW202 SURROUND AMP. C217 131H:0.0022(ML) IC202 R231 132H:0.0012(ML) C203 LA4597 1/50 C209 C219 C233 R215 R221 POWER AMP. MAIN VOL 4.7/50...
  • Page 16 QT-CD131H/132H P14 1 - E TO MAIN SECTION • NOTES ON SCHEMATIC DIAGRAM can be found on page 21. Figure 16 SCHEMATIC DIAGRAM (5/6) – 16 –...
  • Page 17 QT-CD131H/132H BI501 CNS501 Figure 17 SCHEMATIC DIAGRAM (6/6) – 17 –...
  • Page 18 QT-CD131H/132H • The numbers are waveform numbers shown in page 22. Figure 18 WIRING OF P.W.BOARD (1/3) – 18 –...
  • Page 19 QT-CD131H/132H SPEKERS SP502 SP501 R-CH L-CH COLOR TABLE CNS201 BROWN RD(R) SW601 M601 ORANGE TAPE MAIN TAPE MOTOR (241-7) (241-6) YELLOW GREEN BLUE TAPE VIOLET ERASE HEAD RECORD/PLAYBACK GRAY (241-5) HEAD(241-4) WH(W) WHITE BLACK PINK CNS101 (211) T601 TERMINAL PWB-A3...
  • Page 20 QT-CD131H/132H P18 3 - G TO MAIN PWB CNP501 CNS501 1 2 3 4 5 6 7 8 9 10 C510 C509 BI501 R501 ZD501 D504 D503 FW501 C513 IC502 C511 C512 C505 Q501 E C B R505 C504 R507...

  • Page 21: Notes On Schematic Diagram

    QT-CD131H/132H NOTES ON SCHEMATIC DIAGRAM • Resistor: 1. Tuner To differentiate the units of resistors, the symbol as K and M ( ): AM mode are used: the symbol K means 1000 ohm and the symbol M Marking except for ( ): FM mode means 1000 kohm and the resistor without any symbol is an 2.

  • Page 22: Waveforms Of Cd Circuit

    QT-CD131H/132H WAVEFORMS OF CD CIRCUIT 50ms STOP PLAY REVIEW 0.50 V 10.0 V FOCUS SERCH IC801 20 F.E 50ms 10.0 V 50ms 5.0 V 0.50 V IC801 54 DRF 50ms 1.00 V 0.5ms 10.0 V 0.5ms 0.5ms 1.00 V 10.0 V 0.5ms...

  • Page 23: Troubleshooting (Cd Section)

    QT-CD131H/132H TROUBLESHOOTING (CD SECTION) When the CD does not function When the CD section does not operate When the objective lens of the optical pickup is dirty,this section may not operate.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 24 QT-CD131H/132H • Playback can only be performed when a disc is loaded. Check the laser diode driver. Is the Focus servo active? (Can you hear it working?) Check the area around IC801(16) - (21) (focus servo circuit). If the disc is not turning, the DRF Does the DRF signal change from "L"...
  • Page 25 QT-CD131H/132H • Checking the spin system. Play operation is performed without disc. The spin driver circuit is normal. The turntable rotates a little. Check the periphery of IC801 pins 23 to 27, pin 39 and pin 40, The turntable fails to rotate or rotates at high speed.

  • Page 26: Function Table Of Ic

    QT-CD131H/132H FUNCTION TABLE OF IC IC701 RH-iX0105AWZZ (IX0105AW): System Control Microcomputer Pin No. Terminal Port Name Input/ Function Name Output MTCONT2 Input/Output Used to input or output 4 bits at a time. When the output latch is set to "1", the unit will be in the input mode.
  • Page 27 “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 28 QT-CD131H/132H PRICE PRICE DESCRIPTION PART CODE PARTS CODE DESCRIPTION RANK RANK INTEGRATED CIRCUITS VARIABLE CAPACITOR VHITA7358AP-1 AG FM Front End,TA7358AP RTO-H1001SJZZ AH Trimmer,20 pF VHILA1805//-1 AM FM/AF IF MPX.,LA1805 VIBRATORS VHITC9216P/-1 AL PLL,TC9216P IC101 VHIBA3311L/-1 AK REC./P.B.Equalizer Amp., BA3311L RCRSB0001SJZZ AN Crystal,4.5 MHz...
  • Page 29 QT-CD131H/132H PRICE PRICE PART CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK AB 4.7 µF,50V,Electrolytic AB 0.022 µF,50V C207~210 RC-GZA475AF1H C851 VCKYPA1HF223Z AB 2.2 µF,50V,Electrolytic [132H Only] C867,868 RC-GZA225AF1H AB 220 µF,10V,Electrolytic AA 0.0022 µF,50V C211 RC-GZA227AF1A C869,870 VCKYPA1HB222K AB 0.01 µF,16V...
  • Page 30 QT-CD131H/132H PRICE PRICE PART CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK R211,212 VRD-ST2CD103J AA 10 kohm,1/6W [132H Only] R819 VRD-ST2CD393J AA 39 kohms,1/6W R215,216 VRD-ST2CD102J AA 1 kohm,1/6W [132H Only] R820 VRD-ST2CD103J AA 10 kohm,1/6W R219,220 VRD-ST2CD272J AA 2.7 kohms,1/6W [132H]...
  • Page 31 QT-CD131H/132H PRICE PRICE PART CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK SW774 QSW-K0001SJZZ AC Switch,Key Type LHLDZ1006SJZZ AG Bracket,Tuner [Track Down/Review] CGERH0001SJ01 AF Gear,Damper LHLDZ1004SJZZ AF Holder,LCD CD MECHANISM PARTS MSPRC0003SJFE AF Spring,Battery,- JKNBZ0006SJSA AL Knob,Tuning NGERH0586AFZZ AC Gear,Middle LHLDZ1005SJZZ...
  • Page 32 QT-CD131H/132H 703x2 M701 M702 305x2 SW702 PWB-C Figure 5 CD MECHANISM EXPLODED VIEW – 5 –...
  • Page 33 QT-CD131H/132H 131H 601x3 ONLY PWB-A3 251x2 602x6 T601 PWB-B3 601x2 PWB-B4 SO651 230x2 PWB-A5 609x2 PWB-A4 232-1 241 (241-1, 241-2 241-3, 241-4, 241-5, 232-2 241-6, 241-7) SW761 603x4 LCD501 607x2 Silicon Grease PWB-B2 IC203 MECHANISM IC202 PWB-B1 605x3 603x4 604x3...

  • Page 34: Packing Method (131H For Uk Only)

    QT-CD131H/132H PACKING METHOD (131H FOR UK ONLY) • Setting position of switches and knobs 1. AC Power Supply Cord QACCB0001SJ00 2. Polyethylene Bag, Unit SSAKH0001SJZZ Tape Mechanism Control STOP STATE 3. Packing Add., Left/Right SPAKA0001SJZZ TUNING 4. Packing Case SPAKC0020SJZZ...
  • Page 35 QT-CD131H/132H — M E M O — – 8 –...
  • Page 36 QT-CD131H/132H © COPYRIGHT 1998 BY SHARP COPORATION 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.

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