Sharp QT-CD161 Service Manual
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Sharp QT-CD161 Service Manual

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Illustration: QT-CD161
IMPORTANT SERVICE NOTES (FOR U.S.A. ONLY)....................................................................................................... 2
SPECIFICATIONS ............................................................................................................................................................. 2
NAMES OF PARTS ........................................................................................................................................................... 3
REMOTE CONTROL .......................................................................................................................................................... 3
DISASSEMBLY .................................................................................................................................................................. 4
REMOVING AND REINSTALLING THE MAIN PARTS ..................................................................................................... 5
ADJUSTMENT ................................................................................................................................................................... 6
NOTES ON SCHEMATIC DIAGRAM ................................................................................................................................ 9
TYPES OF TRANSISTOR ................................................................................................................................................. 9
WAVEFORMS OF CD CIRCUIT ...................................................................................................................................... 10
BLOCK DIAGRAM ........................................................................................................................................................... 11
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD ............................................................................................. 14
TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 23
FUNCTION TABLE OF IC ................................................................................................................................................ 27
PARTS GUIDE/EXPLODED VIEW
DIFFERENCE BETWEEN QT-CD161 AND QT-CD141
SERVICE MANUAL
CONTENTS
SECTION
REMOTE CONTROL
HEADPHONE SOCKET
SHARP CORPORATION
- 1 -
QT-CD161(S)
QT-CD141(BK)
• 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-CD161
QT-CD141
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
QT-CD161/141
No. S5929QTCD161/
Page

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Summary of Contents for Sharp QT-CD161

  • Page 1: Table Of Contents

    SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD ..................... 14 TROUBLESHOOTING (CD SECTION) ........................... 23 FUNCTION TABLE OF IC ..............................27 PARTS GUIDE/EXPLODED VIEW PACKING OF THE SET (FOR U.S.A. ONLY) DIFFERENCE BETWEEN QT-CD161 AND QT-CD141 SECTION QT-CD161 QT-CD141 REMOTE CONTROL...

  • Page 2: Important Service Notes (For U.s.a. Only)

    QT-CD161/141 FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL. IMPORTANT SERVICE NOTES (FOR U.S.A. 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

    /Cue Button: 16. (TUNER)Tuning: /(CD) Stop Button: 17. (TUNER) Tuning: /(CD) Play/Repeat Button: 18. FM Telescopic Rod Aerial 19. Headphone Socket (QT-CD161 Only) 20. Battery Compartment 21. AC Power Input Socket Remote control (QT-CD161 ONLY) 1. (TUNER) Tuning: /(CD) Play/Repeat Button: 2.

  • Page 4: Disassembly

    4-3,5-1 Switch PWB/ 2. Socket ....(C2) x4 4-3,5-1 Figure 4-2 Headphones PWB 3. Soldering ....(C3) x3 (QT-CD161 Only) Tape Mechanism 1. Screw ....(E1) x4 CD Mechanism 1. Screw ....(F1) x3 Terminal PWB 1. Screw ....(G1) x5 2.

  • Page 5: Removing And Reinstalling The Main Parts

    QT-CD161/141 (E1)x4 (G2)x1 ø3x10mm Push (F1)x3 ø2.5x10mm Driver Tape (G1)x2 Mechanism ø3x10mm Rear Cabinet (G1)x1 ø3x10mm (C1)x1 Top Cabinet ø2.5x8mm (C2)x1 CD Mechanism Terminal PWB (G1)x2 Figure 5-1 ø3x10mm Figure 5-2 Rear Cabinet Pull (H1)x1 (H1)x1 Pull Battery PWB Figure 5-3...

  • Page 6: Adjustment

    QT-CD161/141 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 7 QT-CD161/141 TURNING ON THE TEST MODE The types of test mode for this microcomputer and specific test mode turning-on procedure are as follows. Only the unit key is used. The remote control key is not valid. The power must be turned on while two keys are held down.
  • Page 8 QT-CD161/141 In the tuner test mode the band is FM, and the mode is FM STEREO in case of start-up. As with the ordinary mode, when the PRESET key is pressed for 1ch of preset memory CH, maximum CH is set. When the PRESET key is pressed for maximum CH of preset memory CH, 1ch is set.

  • Page 9: Notes On Schematic Diagram

    QT-CD161/141 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 10: Waveforms Of Cd Circuit

    QT-CD161/141 WAVEFORMS OF CD CIRCUIT 50ms STOP PLAY 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 11: Block Diagram

    QT-CD161/141 MAIN SECTION +7.4V (CD) 62 51 XVDD VVDD IC802 LC78622E SERVO/SIGNAL CONTROL XOUT 17 18 19 20 +7.4V CONSTANT Q804 IC803 VOLTAGE REGULATOR LA6541 VCC1 FOCUS/TRACKING /SPIN/SLIDE SLEQ DRIVER LASER Q801 DRIVER 1 2 3 4 25 26 PICKUP UNIT...
  • Page 12 QT-CD161/141 SPEAKERS SP502 SP501 L-CH R-CH AC INPUT AC 120V 60Hz SO601 IC202 LA4597 POWER AMP. Q201 TUNER Q202 Q251 VR201 BACK UP VOLUME X-BASS SW202 SW601 MAIN SW201-D POWER / FUNCTION M601 TAPE MOTOR FROM TUNER TAPE RADIO P. B...
  • Page 13 QT-CD161/141 TUNER RX501 Q501 Q502 SW702 PICKUP IN X501 24 32 31 23 IC501 CD/TUNER CONTROL MICROCOMPUTER 23 24 16 10 7 TO CD SW504 SECTION MEMORY SW503 BAND SW502 TUNER DOWN SW501 TUNER UP SW505 SW601 PRESET DOWN TO MAIN...

  • Page 14: Schematic Diagram / Wiring Side Of P.w.board

    QT-CD161/141 MAIN PWB-A1(1/4) LASER DRIVE Q801 KTA1266 GR CD SIGNAL R842 C849 0.022 C848 1/50 R871 C850 4.7K 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 C845 4.7/50 C803 0.1/50 FIN2 R838 C834...
  • Page 15 QT-CD161/141 R801 TR– C801 0.01 FO– 8 LD R860 C847 FO– TR– 0.01 TR– 6 5 5 5 5 4 5 3 5 2 5 1 0 PICKUP UNIT 6 4 6 3 6 2 1 6 6 0 5 9 5 8 5 7...
  • Page 16 QT-CD161/141 FM SIGNAL CD SIGNAL PLAYBACK SIGNAL RECORD SIGNAL SW201-A R103 R153 C105 TAPE R104 2.2K 0.0018(B) TUNER R121 2.7K R105 C115 R113 C121 15K(1/4W) 0.018(ML) 8.2K SW102-A 0.01 R115 R117 R109 R102 R101 3.9K 3.9K R123 C113 C117 3.3K...
  • Page 17 QT-CD161/141 HEADPHONES PWB-A2 IC101 IC202 R227 NO. VOLTAGE VOLTAGE QT-CD161 120(1/4W) 0.1V <0V> [3.23V] <0V> [0V] <0.6V> [0.6V] 11.2V R228 <0V> [0V] 120(1/4W) 11.3V <0V> [0V] <0V> [0V] <0V> [0V] 0.1V <7.43V> [7.43V] SPEAKER 10.4V <0V> [0V] WOOFER 5.8V 8OHMS <7.37V>...
  • Page 18 QT-CD161/141 P19 8-A,P16 1-E P16 1-E 21 22 23 24 25 26 28 29 30 31 32 DZ5.1BSB NO. VOLTAGE 0.022 0.9V 1.6V 6.8V 0.0015 6.8V (STYROL) 1.4V 6.2V 6.8V KRA109 M 1.2K 1/50 100/10 6.8K(B) AM/FM 3.3/50 0.01 1/50 6.8K...
  • Page 19 R545 R546 <0V> [0V] 3.3K 5.6K <7.37V> [7.37V] <0.6V> [0.6V] <3.3V> [3.3V] < >: Recording SW507 CD LID ]: Play C516 OPEN/CLOS 100P QT-CD161 ONLY R550 C519 C501 10/16 100/10 R549 RX501 ZD501 REMOTE DZ5.6BSB SENSOR R548 L501 100µH C502...
  • Page 20 QT-CD161/141 CD-C161 ONLY QT-CD141 ONLY P21 10-B FROM SPEAKER CNS201 J201 FW202 HEADPHONES R227 CNP101 1 2 3 4 R228 C351 CNP201 CNP201 CNS201 P21 10-B FROM SPEAKER HEADPHONES PWB-A2 C354 C353 Q351 D102 C123 CNP602 TO TERMINAL PWB FW201...
  • Page 21 QT-CD161/141 SPEKERS SP502 SP501 R-CH L-CH P20 1-A HEADPHONES PWB (QT-CD161) SW601 M601 CNP201 TAPE MAIN TAPE MOTOR P20 3-A CNP602 (233-7) (233-6) TO TERMINAL PWB CNS201 MAIN PWB CNS602 (QT-CD141) TAPE ERASE HEAD RECORD/PLAYBACK (233-5) HEAD(233-4) CNS101 PICK UP UNIT...
  • Page 22 QT-CD161/141 (208) BATTERIES DC12V["D" size (UM/SUM-1, R20 or HP2) battery x 8] T601 POWER TRANSFORMER (230) C653 D653 D652 ACSO C652 C654 SO601 D654 AC SOCKET D651 ACSO AC 120V C651 60Hz TERMINAL PWB-A3 CNS602 P20 6-B TO MAIN PWB BATTERIES DC3V["AA"...

  • Page 23: Troubleshooting (Cd Section)

    QT-CD161/141 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-CD161/141 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 25 QT-CD161/141 • 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 26 QT-CD161/141 • 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 27: Function Table Of Ic

    QT-CD161/141 FUNCTION TABLE OF IC IC501 RH-iX0016SJZZ (IX0016SJ): CD/Tuner Control Microcomputer (1/2) Terminal Pin No. Port Name Input/ Function Name Output Input LCD bias setting power input terminal. P67/AN7 LID-SW (CD) Input CD cover position detection SW input terminal. "L" = CD cover CLOSED, "H"= CD cover OPEN.
  • Page 28 QT-CD161/141 IC501 RH-iX0016SJZZ (IX0016SJ): CD/Tuner Control Microcomputer (2/2) Terminal Pin No. Port Name Input/ Function Name Output P14/SWG28 No connect. P13/SEG27 No connect. P12/SEG26 No connect. P11/SEG25 No connect. P10/SEG24 No connect. P07/SEG23 No connect. P06/SEG22 No connect. P05/SEG21 No connect.
  • Page 29 “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 30 QT-CD161/141 PRICE PRICE PARTS CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK INTEGRATED CIRCUITS VARIABLE CAPACITOR VHITA7358AP-1 AG FM Front End,TA7358AP RTO-H1003SJZZ AG Trimmer VHILA1805//-1 AM FM/AF IF MPX.,LA1805 VHITC9216P/-1 AL PLL,TC9216P VIBRATORS IC101 VHIBA3311L/-1 AK REC./P.B.Equalizer Amp.,BA3311L RCRSB0001SJZZ AN Crystal,4.5 MHz...
  • Page 31 AA 10 kohm,1/6W VRD-ST2CD104J AA 100 kohm,1/6W R530,531 VRD-ST2CD153J AA 15 kohms,1/6W VRD-ST2CD333J AA 33 kohms,1/6W R532 VRD-ST2CD102J AA 1 kohm,1/6W [QT-CD161 Only] VRD-ST2CD100J AA 10 ohm,1/6W R533~541 VRD-ST2CD102J AA 1 kohm,1/6W VRD-ST2CD103J AA 10 kohm,1/6W R542 VRD-ST2CD332J AA 3.3 kohms,1/6W...
  • Page 32 AD Switch,Push Type [X-Bass] R547 VRD-ST2CD332J AA 3.3 kohms,1/6W SW501 QSW-K0001SJZZ AC Switch,Key Type [Tuner Up] R548 VRD-ST2EE470J AA 47 ohms,1/4W [QT-CD161 Only] SW502 QSW-K0001SJZZ AC Switch,Key Type [Tuner Down] R549,550 VRD-ST2CD153J AA 15 kohms,1/6W SW503 QSW-K0001SJZZ AC Switch,Key Type [Band]...
  • Page 33 TINSZ0037SJZZ Operation Manual [Except for U.S.A/Central America] [QT-CD161] TINSZ0038SJZZ Operation Manual [Except for U.S.A./Central America] [QT-CD141] TLABN0053SJZZ AE Label,Serial No. [QT-CD161] TLABN0054SJZZ Label,Serial No. [QT-CD141] TLABR1041SJZZ AD Label,Bar Code [QT-CD141] TLABR1043SJZZ AE Label,Bar Code [QT-CD161] TLABZ0026SJZZ AE Label,Feature [QT-CD161] TLABZ0027SJZZ...
  • Page 34 QT-CD161/141 703x2 M701 M702 305x2 SW702 PWB-B Figure 5 CD MECHANISM EXPLODED VIEW – 5 –...
  • Page 35 QT-CD161/141 601x4 602x2 PWB-A3 602x4 T601 PWB-A4 601x2 PWB-A5 SO601 225x2 PWB-A7 603x2 PWB-A2 227-2 233 (233-1, 233-2 233-3, 233-4, 233-5, 233-6, 233-7) 227-1 603x2 607x2 PWB-A6 SW507 603x4 607x2 603x3 Silicon PWB-A1 Grease IC202 MECHANISM IC203 603x4 605x3 604x3...

  • Page 36: Packing Of The Set (For U.s.a. Only)

    Bar Code Label Energy Star Label TLABZ0032SJZZ : Not Replacement Item © COPYRIGHT 1999 BY SHARP COPORATION ALL RIGHTS RESERVED. SHARP CORPORATION Communication Systems Group Quality & Reliability Control Center No part of this publication may be reproduced, Higashihiroshima, Hiroshima 739-0192, Japan...

This manual is also suitable for:

Qt-cd141Qt-cd161sQt-cd141bk

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