Service manual

ManualsBrandsSharp ManualsCassette PlayerQT-27H

QT-CD111/111C

– 1 –

Illustration: QT-CD111

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 ................................................................................................................................................................... 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

PACKING OF THE SET (FOR QT-CD111 ONLY)

• 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.

QT-CD111

QT-CD111C

SERVICE MANUAL

SHARP CORPORATION

No. S3819QTCD111/

This document has been published to be used

for after sales service only.

The contents are subject to change without notice.

Summary of content (32 pages)

PAGE 1
QT-CD111/111C SERVICE MANUAL No. S3819QTCD111/ QT-CD111 QT-CD111C Illustration: QT-CD111 • 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. CONTENTS Page IMPORTANT SERVICE NOTES (FOR QT-CD111 ONLY) ................................................................................................ 2 SPECIFICATIONS ....................................................................................................
PAGE 2
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. 1. Inspect all lead dress to make certain that leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the audio product. 2.
PAGE 3
QT-CD111/111C NAMES OF PARTS 1 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: 2 3 4 5 6 7 8 9 10 11 10. (CD) Play Indicator: 11. (CD) Track Number Indicator 12. (CD) Repeat Indicator: 13. Volume Control 14. Function Selector/Power Switch 15. Extra Bass Button: X-BASS 16. (CD) Track Down/Review Button: 17.
PAGE 4
QT-CD111/111C DISASSEMBLY (C2)x1 Caution on Disassembly Follow the below-mentioned notes when disassembling the unit and reassembling it, 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 nylon bands or wire holders where they need be removed when disassembling the unit.
PAGE 5
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 2.6 x6mm How to remove the pickup (See Fig. 5.) 1. Remove the screws (A1) x 2 pcs., to remove the shaft (A2) x1 pc. 2. Remove the stop washer (A3) x1 pc., to remove the gear (A4) x 1 pc. 3. Remove the pickup.
PAGE 6
QT-CD111/111C ADJUSTMENT MECHANISM SECTION TUNER SECTION • Driving Force Check Torque Meter fL: Low-range frequency fH: High-range frequency Specified Value PLAY: TW-2412 • FM IF/RF Over 120 g Specified Value/Adjusting Point Test Stage • Torque Check Torque Meter Specified Value Play: TW-2111 25 to 65 g.cm Fast Forward: TW-2231 60 to 130 g.cm Rewind: TW-2231 60 to 130 g.cm • Head Azimuth Torque Meter IF T1 Detection T2 Band Coverage fL: L2 fH: TC2 Tracking 88.0 MHz: L1 108.
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. TEST MODE Start Note Operation While holding down the "STOP" button, move the FUNCTION/POWER switch to "CD". Then, release the "STOP" button and, within 0.5 second, connect the TEST POINT to GND (within 0.5 second). (See Fig. 7) 1.
PAGE 8
24 27 28 31 34 35 36 SEG4 57 ~ 60 SEG1 ~ 9 ~ 14 17 ~ 19 21 20 SL+ SL– +5V (D) PU-IN SW 13 14 38 25 VLC3 VDD SYSTEM MICROCOMPUTER 37 LID 23 33 22 X701 4MHz 44 30 IC701 IX0105AW 41 COM3 RX771 REMOTE SENSOR 3 2 1 RC IN COM0 RES PICKUP IN SW702 Figure 8 BLOCK DIAGRAM (1/2) –8– M702 SLIDE MOTOR M701 SPIN MOTOR TRACKING COIL FOCUS COIL PICKUP UNIT M M 17 18 26 27 11 12 1 2 30 31 1 2 3 4 SL– SL+ FIN2 FIN1 E F Q804 IC804 BA5914FP 10 19 23 25 JP– 44 43 40 32 9 EFM
PAGE 9
Figure 9 BLOCK DIAGRAM (2/2) –9– L-CH ERASE HEAD R-CH REC / PB HEAD FROM CD SECTION 1 L1 FM RF 2 3 9 6 FM +B SW102-H REC / PB SW102 REC / PB B.D REC / PB SW102 C,E P.B P.B R-CH 1 (AUDIO GND) 2 CD L-CH 3 +7.4V 4 +B2 5 (DIGITAL GND) 6 (POWER GND) 5 VCC MIX 8 4 7 BIAS OSC. REC P. B SW102-G REC / PB 8 6 R 12 9 R IC101 EQULIZER AMP. BA331IL L 1 REG. 23 REC +B2 SW601 MAIN SW201-D POWER / FUNCTION AM / FM SELECT +B FM +B 14 10 5 11 6 R 2 L 8 TUNER +B TRIG. VCO ST.
PAGE 10
QT-CD111/111C SWITCH PWB-A2 SW774 TRACK DOWN/ REVIEW Q805 SS9012H +B SW773 TRACK UP/ CUE R842 22 C849 0.022 C848 1/50 SW771 PLAY/ REPEAT 3 1 3 1 C837 10/16 +B C838 0.01 R776 10K C835 0.1/50 +B SW761 CD LID OPEN/CLOSE C839 1/50 SW772 STOP C840 0.33/50 B IC701 PIN VOLTAGE PIN VOLTAGE NO. NO. 0V 1 33 5V 0V 2 34 0V 0V 3 35 0V 0V 4 36 0V 0V 5 37 0.4V 0V 6 38 5V 3.9V 7 39 3.1V 0V 8 40 1.5V 5V 9 41 2.4V 10 4.1V 42 2.4V 11 4.1V 43 2.4V 12 0V 44 2.4V 13 0V 45 2.4V 14 0V 46 2.4V 15 0.4V 47 2.
PAGE 11
+B F E B A K C802 47/16 R801 1K 44 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 TR– TR+ FO+ FO– GND PD TR+ FO+ FO– TR+ FO+ VR LD FO– TR– TR– PICKUP UNIT +B C867 10/16 TEST3 LVDD 36 MUTEL 35 34 R873 100 C870 0.0022 R875 R876 10K 10K C868 R874 10/16 100 +B LVSS 38 DOUT B F XL801 16.93MHz LCHO 37 C2F EMPH CONT5 CONT4 CONT3 B1801 TR+ TR– FO– FO+ PW FSX SFSY SBCK RWC WRQ COIN SQOUT RES CQCK 16M TST11 4.2M K E A E A B F C869 0.
PAGE 12
QT-CD111/111C A R5 330K C28 0.0015 (STYROL) VR1 6.8K (B) R29 15K 2 VCO AM/FM R-CH MO/ST C32 0.022 C31 0.022 CF2 C21 0.022 11 C35 1/50 C33 1/50 C34 1/50 R13 3.9K R14 3.9K SW201-A CD AUTO FM AM TAPE VC3 fH AM fL TRACKING P11 7 - H TO CD SERVO/ DISPLAY SECTION VC4 R458 R457 1.2K 1.2K R-CH AUDIO GND L-CH CD +7.4V DIGITAL GND POWER GND R16 2.2K C36 0.022 fH fL AM BAND COVERAGE R456 15K 1 2 3 4 5 6 SW201-B CD AUTO FM AM TAPE R15 2.2K L4 AM OSC. VOLT 1.6V 1.6V 6V (6 0.2V 1.
PAGE 13
QT-CD111/111C MAIN PWB-A1(1/2) VOLTAGE PLAYBACK SIGNAL RECORD SIGNAL 2 SW202-B R218 22K R216 2.2K R220 3.3K VR201-A 20K (B) C214 0.039 (ML) C233 470/10 1 C223 100/10 VOLUME 4 C224 100/10 C216 0.039(ML) C215 0.039 SW202-A (ML) R219 3.3K C218 0.0039 VR201-B 20K(B) R217 22K 12 + – C229 100/10 C219 0.047 C221 (ML) 0.001 R221 1K 7 C225 220/25 3 C222 0.001 13 11 C232 0.1 (ML) 9 – + 10 6 C220 0.047 (ML) R222 1K C231 0.
PAGE 14
7 22 CF2 C34 T1 C26 R3 C10 C28 12 11 10 9 8 7 6 5 4 3 2 1 C15 C39 13 14 15 16 17 18 19 20 21 22 23 24 C37 R29 VR1 VCO L2 T2 R27 C23 C25 C27 R25 C29 C14 L1 R11 C22 C24 L4 C35 SW771 PLAY • The numbers 1 to 12 are waveform numbers shown in page 17.
PAGE 15
QT-CD111/111C SPEKERS SP502 R-CH SP501 L-CH COLOR TABLE BR CNS201 SW601 TAPE MAIN (241-7) 1 WH 2 BK 3 RD M601 TAPE MOTOR (241-6) TAPE ERASE HEAD (241-5) RED OR ORANGE YL YELLOW GR GREEN BL BLUE VL VIOLET GY GRAY WH(W) WHITE BK BLACK PK PINK RD BK BR WH YL RECORD/PLAYBACK HEAD(241-4) BROWN RD(R) BK CNS101 4 3 2 1 BK WH RD BK BK (211) T601 POWER TRANSFORMER TERMINAL PWB-A3 + BATTERYS DC12V["D"SIZE(UM/SUM-1, R20 or HP2)battery 8] C653 (236) RD D653 D652 RD C652 C654
PAGE 16
QT-CD111/111C NOTES ON SCHEMATIC DIAGRAM • Resistor: To differentiate the units of resistors, the symbol as K and M are used: the symbol K means 1000 ohm and the symbol M means 1000 kohm and the resistor without any symbol is an ohm resistor. The resistor designated "Fusible" is a fuse type resistor • Capacitor: To indicate the unit of capacitor, a symbol P is used: this symbol P means micro-micro-farad and the unit of the capacitor without such a symbol is microfarad.
PAGE 17
QT-CD111/111C WAVEFORMS OF CD CIRCUIT 1 2 5ms 0.50 V IC801 20 F.E 5ms 5.0 V IC801 54 DRF STOP FOCUS PLAY SERCH 50ms 10.0 V JP+ 7 50ms 10.0 V JP- 8 50ms 0.50 V JP 9 50ms 1.00 V TE 6 0.5ms 10.0 V JP+ 7 0.5ms 10.0 V JP- 8 0.5ms 0.50 V JP 9 0.5ms 1.00 V TE 10 20ms 1.00 V SPO 11 20ms 2.00 V CLV+ 10 50ms 1.00 V SPO 11 50ms 2.00 V CLV+ 3 1 3 6 CUE 0.5ms 1.00 V HF 1 4 0.5ms 5.0 V HFL 5 0.5ms 5.0 V TES 3 0.5ms 1.00 V H.F 4 0.5ms 5.0 V HFL 5 0.5ms 5.
PAGE 18
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. Remove the cabinet and follow the troubleshooting instructions.
PAGE 19
QT-CD111/111C • Playback can only be performed when a disc is loaded. No Check the laser diode driver. Check the area around IC801(16) - (21) (focus servo circuit). No If the disc is not turning, the DRF should not change to "H". Is the Focus servo active? (Can you hear it working?) Yes ▼ Yes Does the DRF signal change from "L" to "H"? Check the spin system. Yes Yes No Level is abnormal. ▼ Is HF waveform normal (see the Fig. 19-1, 2)? Yes Check the periphery of IC801 pins 41 and 42.
PAGE 20
QT-CD111/111C • Checking the spin system. Play operation is performed without disc. Yes The spin driver circuit is normal. The turntable rotates a little. Yes No The turntable fails to rotate or rotates at high speed. Yes Check the periphery of IC801 pins 23 to 27, pin 39 and pin 40, IC802 pin 12 and pin 13, IC804 to BI803/CNS803. • Checking the VCO-PLL system Play operation is performed when disc exits. Yes Although HF waveform is normal, TOC data cannot be read. Yes Check PDO waveform (Fig. 20).
PAGE 21
QT-CD111/111C FUNCTION TABLE OF IC IC701 RH-iX0105AWZZ (IX0105AW): System Control Microcomputer Pin No. Terminal Name Port Name Input/ Output Function 1* P03 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. The key-on wakeup function, which can be switched on or off by the software, and a pull-up transistor, which can be turned on or off by the software, are built in.
PAGE 22
QT-CD111/111C —MEMO— – 22 –
PAGE 23
QT-CD111/111C PARTS GUIDE MODEL QT-CD111 QT-CD111C “HOW TO ORDER REPLACEMENT PARTS” To have your order filled promptly and correctly, please furnish the following information. 1. MODEL NUMBER 2. REF. No. 3. PART NO. 4. DESCRIPTION For U.S.A. only Contact your nearest SHARP Parts Distributor to order. For location of SHARP Parts Distributor, Please call Toll-Free; 1-800-BE-SHARP MARK: SPARE PARTS-DELIVERY SECTION Explanation of capacitors/resistors parts codes Capacitors Resistors VCC ..............
PAGE 24
QT-CD111/111C NO. PRICE RANK PART CODE DESCRIPTION INTEGRATED CIRCUITS IC1 IC2 IC101 VHILA1186N/-1 VHILA1805//-1 VHIBA3311L/-1 J J J IC202 IC203 IC701 VHILA4597//-1 VHIKIA7808P-1 RH-IX0105AWZZ J J J IC801 IC802 IC804 VHILA9241M/-1 VHILC78623D-1 VHIBA5914FP-1 J J J AE FM Front End,LA1186N AM FM/AF IF MPX.,LA1805 AK REC./P.B.Equalizer Amp., BA3311L AH Power Amp.,LA4597 AH Voltage Regulator,KIA7808P BA System Microcomputer, IX0105AW AS Servo Amp.
PAGE 25
QT-CD111/111C NO. C844 C845 C846 C847 C848 C849 C850 C851 C867,868 C869,870 C873 C887 C889 C890 PRICE RANK PART CODE RC-GZA337AF1A RC-GZA475AF1H RC-GZA337AF1A VCTYPA1CU103M RC-GZA105AF1H VCKYPA1HF223Z VCTYPA1CU104M VCKYPA1HF223Z RC-GZA106AF1C VCKYPA1HB222K VCKYPA1HF103Z VCKYPA1HF223Z RC-GZA106AF1C RC-GZA107AF1A DESCRIPTION J J J J J J J J J J J J J J AB AB AB AE AB AB AB AB AB AA AB AB AB AB 330 µF,10V,Electrolytic 4.7 µF,50V,Electrolytic 330 µF,10V,Electrolytic 0.01 µF,16V 1 µF,50V,Electrolytic 0.
PAGE 26
QT-CD111/111C NO. PRICE RANK PART CODE DESCRIPTION NO. 608 CD MECHANISM PARTS ! 301 302 303 304 305 306 701 702 703 704 M701 M702 SW4 NGERH0586AFZZ NGERH0587AFZZ MLEVP1054AFZZ NSFTM0291AFFW PCUSG0613AFZZ RCTRH8179AFZZ XBSSD26P06000 XHBSD20P05000 XBBSD20P03000 LX-WZ1070AFZZ RMOTV0408AFM3 RMOTV0409AFM1 QSW-F9001AWZZ PARTS CODE XBBSD25P06000 PRICE DESCRIPTION RANK J AB Screw,ø2.
PAGE 27
QT-CD111/111C 306 701 A 704 304 701 B 302 702 C 301 303 D 703x2 E M701 F 305 M702 305x2 G SW702 H PWB-B 1 2 3 4 Figure 4 CD MECHANISM EXPLODED VIEW ––27 4 –– 5 6
PAGE 28
QT-CD111/111C 203 213 601x3 A 215 212 242 240 PWB-A3 B 211 236 602x6 214 601x2 221 231 601 603 603 603x2 C 230x2 202 603 TAPE MECHANISM 241 (241-1, 241-2 241-3, 241-4, 241-5, 241-6, 241-7) D 232-2 222 228 227 226 220 204 225 229 CD MECHANISM 602 606 223 216 SW761 224 603x4 608 607x2 603 603 234 E 205 Silicon Grease 605x3 604x3 F 232-1 232 201 603x4 PWB-A1 218 238 219 217 603x2 603 235 G PWB-A2 207 603x5 LCD701 603x4 210 208 209 206 H NOTE: The parts of
PAGE 29
QT-CD111/111C PACKING OF THE SET (FOR QT-CD111 ONLY) • Setting position of switches and knobs Tape Mechanism Control STOP STATE TUNING LOW POWER/FUNCTION OFF/TAPE X-BASS OFF VOLUME LOW AC Power Supply Cord Polyethylene Bag, Unit SSAKH0001SJZZ Packing Case SPAKC0015SJZZ Feature Label FR ON T Operation Manual FR ON T Packing Add.
PAGE 30
QT-CD111/111C —MEMO— – 30 –
PAGE 31
QT-CD111/111C —MEMO— – 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.