Sharp QT-CD111 Service Manual
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Sharp QT-CD111 Service Manual

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Illustration: QT-CD111
IMPORTANT SERVICE NOTES (FOR QT-CD111 ONLY) ................................................................................................ 2
SPECIFICATIONS ............................................................................................................................................................. 2
NAMES OF PARTS ........................................................................................................................................................... 3
DISASSEMBLY .................................................................................................................................................................. 4
REMOVING AND REINSTALLING THE MAIN PARTS ..................................................................................................... 5
ADJUSTMENT ................................................................................................................................................................... 6
BLOCK DIAGRAM ............................................................................................................................................................. 8
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD ............................................................................................. 10
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 16
TYPES OF TRANSISTOR ............................................................................................................................................... 16
WAVEFORMS OF CD CIRCUIT ...................................................................................................................................... 17
TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 18
FUNCTION TABLE OF IC ................................................................................................................................................ 21
PARTS GUIDE/EXPLODED VIEW
SERVICE MANUAL
CONTENTS
SHARP CORPORATION
- 1 -
QT-CD111
QT-CD111C
• 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.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
QT-CD111/111C
No. S3819QTCD111/
Page

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Questions and answers

Pál
February 11, 2025

Van-e külső antenna csatlakozási lehetőség vagy lehet-e erősít csatlakoztani

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1 comments:
Mr. Anderson
February 12, 2025

The Sharp QT-CD111 has an FM telescopic rod aerial, but there is no mention of an option for connecting an external antenna or a signal booster.

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Summary of Contents for Sharp QT-CD111

  • Page 1: Table Of Contents

    CONTENTS Page IMPORTANT SERVICE NOTES (FOR QT-CD111 ONLY) ....................2 SPECIFICATIONS ................................2 NAMES OF PARTS ................................3 DISASSEMBLY .................................. 4 REMOVING AND REINSTALLING THE MAIN PARTS ..................... 5 ADJUSTMENT ...................................

  • Page 2: Important Service Notes (For Qt-Cd111 Only)

    QT-CD111/111C FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL. IMPORTANT SERVICE NOTES (FOR QT-CD111 ONLY) BEFORE RETURNING THE AUDIO PRODUCT (Fire & Shock Hazard) Before returning the audio product to the user, perform the following safety checks.

  • Page 3: Names Of Parts

    QT-CD111/111C NAMES OF PARTS 1. Cassette Compartment 2. CD Compartment 3. Tuning Control 4. (TAPE) Record Button: 5. (TAPE) Play Button: 6. (TAPE) Rewind Button: 7. (TAPE) Fast Forward Button: 8. (TAPE) Stop/Eject Button: 9. (TAPE) Pause Button: 4 5 6 7 8 9 10 11 10.

  • Page 4: Disassembly

    QT-CD111/111C DISASSEMBLY (C2)x1 Caution on Disassembly (C1)x5 Switch PWB Follow the below-mentioned notes when disassembling the ø3x10mm unit and reassembling it, to keep it safe and ensure excellent performance: 1. Take cassette tape and compact disc out of the unit.

  • Page 5: Removing And Reinstalling The Main Parts

    QT-CD111/111C REMOVING AND REINSTALLING THE MAIN PARTS CD MECHANISM SECTION Perform steps 1, 2, 3 and 5 of the disassembly method to remove the CD mechanism. (A1) x2 How to remove the pickup (See Fig. 5.) 1. Remove the screws (A1) x 2 pcs., to remove the shaft (A2) 2.6 x6mm...

  • Page 6: Adjustment

    QT-CD111/111C ADJUSTMENT MECHANISM SECTION TUNER SECTION • Driving Force Check fL: Low-range frequency fH: High-range frequency Torque Meter Specified Value • FM IF/RF PLAY: TW-2412 Over 120 g Specified Instrument Test Stage • Torque Check Value/Adjusting Connection Point Torque Meter...
  • Page 7 QT-CD111/111C 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 8: Block Diagram

    QT-CD111/111C Figure 8 BLOCK DIAGRAM (1/2) – 8 –...
  • Page 9 QT-CD111/111C Figure 9 BLOCK DIAGRAM (2/2) – 9 –...

  • Page 10: Schematic Diagram / Wiring Side Of P.w.board

    QT-CD111/111C IC701 NO. VOLTAGE NO. VOLTAGE SWITCH PWB-A2 0.4V SW774 Q805 3.9V 3.1V TRACK DOWN/ SS9012H 1.5V REVIEW 2.4V 4.1V 2.4V SW773 4.1V 2.4V TRACK UP/ CUE R842 2.4V C849 2.4V 0.022 2.4V 0.4V 2.4V C848 SW771 0.4V 2.4V PLAY/ 1/50 2.4V...
  • Page 11 QT-CD111/111C R801 TR– C801 0.01 FO– FO– R860 C847 FO– TR– 0.01 TR– R871 C850 4.7K PICKUP UNIT C845 4.7/50 R858 C841 0.047 XL801 DEFI EFLG XVSS 16.93MHz SBSY C842 VVss 0.047 ISET XOUT R838 C834 IC802 XVDD 0.033 R857...
  • Page 12 QT-CD111/111C 330K ROD ANTENA 820K NO. VOLT 1.6V B.P.F. 1.6V 0.022 (CH) LA1186N 6V (6 0.022 1.2K 220/10 0.2V FM FRONT END FM BAND 0.022 0.0039 470P COVERAGE 1.6V RF AMP. FM DET 1 2 3 6.8K 3.3/50 2.5V 3.3/50 2.5V...
  • Page 13 QT-CD111/111C MAIN PWB-A1(1/2) NO. VOLTAGE VOLTAGE 1.6V 1.2V (0V) IC202 1.6V 1.9V (1.6V) NO. VOLTAGE 6V (6.3V) 1V (1.3V) CD SIGNAL FM SIGNAL 0.1V 0.2V (0.7V) 1.7V 1.6V 1.5V (1.7V) 1.5V (1.5V) 11.2V PLAYBACK SIGNAL AM SIGNAL 0.4V (0.4V) 6.1V (6.4V) 11.3V...
  • Page 14 QT-CD111/111C 1 2 3 1 2 3 4 CNP101 C351 CNP201 SW102 MAIN PWB-A1 C353 Q351 C354 D102 C123 C216 R220 C234 C233 C218 C217 R221 R222 C220 C215 R219 C219 C221 C222 C214 C223 C226 C224 IC202 C213 SW203...
  • Page 15 QT-CD111/111C SPEKERS SP502 SP501 R-CH L-CH COLOR TABLE BROWN RD(R) ORANGE CNS201 YELLOW SW601 M601 GREEN TAPE MAIN TAPE MOTOR BLUE (241-7) (241-6) VIOLET GRAY WH(W) WHITE TAPE BLACK ERASE HEAD RECORD/PLAYBACK (241-5) HEAD(241-4) PINK CNS101 (211) T601 TERMINAL PWB-A3...

  • Page 16: Notes On Schematic Diagram

    QT-CD111/111C 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 17: Waveforms Of Cd Circuit

    QT-CD111/111C WAVEFORMS OF CD CIRCUIT STOP PLAY 50ms REVIEW 0.50 V 10.0 V IC801 20 F.E FOCUS SERCH 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 18: Troubleshooting (Cd Section)

    QT-CD111/111C 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 19 QT-CD111/111C • 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). Does the DRF signal change from "L" to "H"?
  • Page 20 QT-CD111/111C • 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 21: Function Table Of Ic

    QT-CD111/111C FUNCTION TABLE OF IC IC701 RH-iX0105AWZZ (IX0105AW): System Control Microcomputer Terminal Pin No. 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 22 QT-CD111/111C — M E M O — – 22 –...
  • Page 23 “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 24 QT-CD111/111C PRICE PRICE PART CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK INTEGRATED CIRCUITS AB 0.0047 µF,50V VCKYPA1HB472K AB 0.022 µF,50V VCKYPA1HF223Z AB 0.022 µF,50V C20,21 VCKYPA1HF223Z VHILA1186N/-1 AE FM Front End,LA1186N AA 0.0039 µF,50V VHILA1805//-1 AM FM/AF IF MPX.,LA1805 VCKYPA1HB392K AB 0.01 µF,16V...
  • Page 25 QT-CD111/111C PRICE PRICE DESCRIPTION PARTS CODE DESCRIPTION PART CODE RANK RANK AB 330 µF,10V,Electrolytic C844 RC-GZA337AF1A R802 VRD-ST2CD104J AA 100 kohm,1/6W AB 4.7 µF,50V,Electrolytic C845 RC-GZA475AF1H R803 VRD-ST2CD153J AA 15 kohms,1/6W AB 330 µF,10V,Electrolytic C846 RC-GZA337AF1A R804 VRD-ST2CD222J AA 2.2 kohms,1/6W AE 0.01 µF,16V...
  • Page 26 QT-CD111/111C PRICE PRICE PART CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK XBBSD25P06000 AB Screw,ø2.5×6mm CD MECHANISM PARTS PACKING PARTS [C Only] NGERH0586AFZZ AC Gear,Middle NGERH0587AFZZ AC Gear,Drive SPAKA0001SJZZ AK Packing Add.,Left/Right SPAKC0002SJZZ AK Packing Case MLEVP1054AFZZ AC Rail,Guide SSAKH0001SJZZ AC Polyethylene Bag,Unit...
  • Page 27 QT-CD111/111C 703x2 M701 M702 305x2 SW702 PWB-B Figure 4 CD MECHANISM EXPLODED VIEW – 27 – – 4 –...
  • Page 28 QT-CD111/111C 601x3 PWB-A3 602x6 601x2 230x2 603x2 232-1 241 (241-1, 241-2 TAPE 241-3, 241-4, 241-5, MECHANISM 232-2 241-6, 241-7) SW761 603x4 MECHANISM 607x2 Silicon 605x3 Grease 604x3 603x4 PWB-A1 603x2 PWB-A2 603x5 LCD701 603x4 NOTE: The parts of cassette mechanism which are supplied are only the unit and consumable parts.

  • Page 29: Packing Of The Set (For Qt-Cd111 Only)

    QT-CD111/111C PACKING OF THE SET (FOR QT-CD111 ONLY) • Setting position of switches and knobs Tape Mechanism Control STOP STATE TUNING POWER/FUNCTION OFF/TAPE X-BASS VOLUME AC Power Supply Cord Polyethylene Bag, Unit SSAKH0001SJZZ Packing Case SPAKC0015SJZZ Feature Label Operation Manual Packing Add., Left/Right...
  • Page 30 QT-CD111/111C — M E M O — – 30 –...
  • Page 31 QT-CD111/111C — M E M O — – 31 –...
  • Page 32 QT-CD111/111C © 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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