Service manual

ManualsBrandsSharp ManualsDocking StationQT-CD161H

QT-CD161/141

– 1 –

CONTENTS

Page

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

PACKING OF THE SET (FOR U.S.A. 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-CD161(S)

QT-CD141(BK)

SERVICE MANUAL

SHARP CORPORATION

No. S5929QTCD161/

This document has been published to be used

for after sales service only.

The contents are subject to change without notice.

Illustration: QT-CD161

SECTION

QT-CD141

REMOTE CONTROL

DIFFERENCE BETWEEN QT-CD161 AND QT-CD141

QT-CD161

HEADPHONE SOCKET

Summary of content (36 pages)

PAGE 1
QT-CD161/141 SERVICE MANUAL No. S5929QTCD161/ 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. Illustration: QT-CD161 CONTENTS Page IMPORTANT SERVICE NOTES (FOR U.S.A. ONLY)....................................................................................................... 2 SPECIFICATIONS ...........................................................................................
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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. 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.
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QT-CD161/141 NAMES OF PARTS 3 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: 4 5 6 7 8 1 / 8. (TAPE) Pause Button: 2 9 10 9. Band/Pause: 10. Tuner Memory 11. Volume 12. Power, On/Function Switch 13. Extra Bass Button: X-BASS 14. (CD) Track Down: /Review Button: 15. (CD) Track Up: /Cue Button: 16. (TUNER)Tuning: /(CD) Stop Button: 17.
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QT-CD161/141 DISASSEMBLY 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 to be removed when disassembling the unit.
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QT-CD161/141 (E1)x4 ø3x10mm (G2)x1 Push (F1)x3 ø2.5x10mm Driver Tape Mechanism (G1)x2 ø3x10mm Rear Cabinet (G1)x1 ø3x10mm Top Cabinet CD Mechanism (C2)x1 (C1)x1 ø2.5x8mm Terminal PWB (G1)x2 ø3x10mm Figure 5-1 Figure 5-2 Rear Cabinet Pull (H1)x1 (H1)x1 Pull Battery PWB Figure 5-3 REMOVING AND REINSTALLING THE MAIN PARTS CD MECHANISM SECTION (A1) x2 ø2.6 x6mm Perform steps 1, 2, 3 and 5 of the disassembly method to remove the CD mechanism. How to remove the pickup (See Fig. 5-4.
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QT-CD161/141 ADJUSTMENT TUNER SECTION MECHANISM SECTION fL: Low-range frequency fH: High-renge frequency • Driving Force Check Torque Meter Specified Value PLAY: TW-2412 • FM RF Signal generator: 1 kHz, 75 kHz dev., FM modulated Over 120 g • Torque Check Torque Meter Test Stage Frequency Frequency Display Specified Value Play: TW-2111 25 to 65 g.cm 87.5 MHz 60 to 130 g.cm Band Coverage — Fast Forward: TW-2231 Rewind: TW-2231 60 to 130 g.cm RF 90.0 MHz (10~30 dB) 90.
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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. (1) CD test mode function The power is turned while the (PRESET ) and STOP (TUNING ) keys are held down. (2) Tuner test mode function ) and PAUSE (BAND) keys are held down.
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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. The BAND key is valid. As in the ordinary mode, the band/FM MONO/STEREO mode can be switched. To exit from the tuner test mode, turn off the power to the microcomputer.
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QT-CD161/141 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.
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QT-CD161/141 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.
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QT-CD161/141 TO MAIN SECTION +7.4V (CD) 45 XIN 44 XOUT 46 39 38 33 32 IC802 LC78622E SERVO/SIGNAL CONTROL 11 8 4 2 53 54 55 56 57 58 61 1 9 10 12 13 14 15 16 17 18 19 20 VCC1 Q801 DRF CE DAT CL CLK DEF JP– SLI SLC CV+ 64 54 53 52 51 50 49 SLD 29 SLEQ 28 SPO 27 FD 16 TO 15 +7.
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QT-CD161/141 SPEAKERS SP502 SP501 R-CH L-CH 12 10 T601 POWER TRANSFORMER 8 IC202 LA4597 POWER AMP.
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QT-CD161/141 TUNER +B IC502 RESET X501 27 24 32 SW702 PICKUP IN MONO/ST 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 RESET Q501 Q502 12 31 23 ~ 79 13 76 , 11 IC501 CD/TUNER CONTROL MICROCOMPUTER ~ 72 56 14 6 5 13 4 20 3 19 TO CD SECTION 6 22 23 24 SW504 MEMORY SW503 BAND SW502 TUNER DOWN SW501 TUNER UP SW505 PRESET DOWN SW506 PRESET UP TO MAIN SECTION SW601 MAIN AUDIO +12V VOLTAGE REGULATOR ZD1 15 MO/ST 9 TUNER +B Q5 Q6 A-GND FM+B 13 17 16 10 7 L-CH OUT 10 R-C
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QT-CD161/141 MAIN PWB-A1(1/4) LASER DRIVE Q801 KTA1266 GR CD SIGNAL A R842 22 C849 0.022 12 TD– 13 TD 14 JP CL CLK DEF DRF CE DAT REFI VCC2 FSS SPD SLEQ SLD SL– SL+ JP– C833 0.001 R833 5.6K R832 56K R836 47K R837 47K R8 1.2 C832 R834 1K 27P C831 0.0027 R835 470 C822 220P R821 56K R822 6.8K R827 220K D802 1N4148 R810 82K C851 0.022 C821 1/50 2 3 4 5 6 7 8 9 C846 PU IN WRQ SQOUT DRF SL– SL+ RWC CO IN CQCK RES 10 11 D-GND 1 +B 7.4V 45 P16 1-F R838 33K C834 0.033 C887 0.
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5 4 3 2 1 F E B A K TOFF TGL IC802 LA78623D SERVO/SIGNAL CONTROL BI801 TR+ TR– FO– FO+ XL801 16.93MHz 44 43 42 41 40 C868 R874 10/16 100 C867 10/16 LVSS 38 LCHO 37 LVDD 36 MUTEL 35 C890 100/10 B F TR– TR+ FO+ FO– GND PD VR LD TR+ FO+ FO– TR– TR– PICKUP UNIT R873 100 PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 C870 0.0022 C869 0.0022 34 33 R880 100 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 L801 0.
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QT-CD161/141 FM SIGNAL CD SIGNAL A PLAYBACK SIGNAL RECORD SIGNAL CNS101 CNP101 1 1 2 C SW102-B R P C107 R107 (B)820P 1K 2 3 3 4 4 R-CH R P SW102-E ERASE HEAD R NF2 11 4 C112 330P(B) C108 820P(B) R P R108 C110 1K 270P(B) SW102-D R110 C106 0.0018(B) 120 P SW102-H R119 3.3K BA3311L C111 REC./P.B. 330P(B) EQUALIZER IN2 9 GND 6 7 C114 47/16 C116 0.018 (ML) FILTER 10 ALC T 2 OUT2 12 C120 47/16 SW102-C R P L-CH R115 R117 3.9K 3.
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QT-CD161/141 C233 470/10 R222 C220 0.068 1K C222 0.001(B) – + 6 1 D201 1SS133 8 CNS201 C234 470/10 1 2 3 C652 0.022(Z) CNS602 CNP602 SW201-D CD TUNER TAPE 1 2 3 C302 0.
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QT-CD161/141 TUNED MONO/STEREO STEREO GND(D) 21 22 23 24 25 26 28 29 30 31 32 P16 1-E 7 DTE OUT 17 ST IND 18 6 GND C38 R25 C36 5 AM IF 0.018 33K 0.0022 (M) 19 R24 3.9K FM DET 20 T2 +B C31 0.022 C32 0.022 C12 0.022 FM +B 21 R5 10K R12 4.7K 4 2 1 FB B.P.F 1 2 3 F1 H R71 6.8K C10 24P (UJ) C14 0.022 R3 33K R2 100K C2 0.01 R9 100K FM BAND COVERAGE AM TRACKING fL fH AM ANT VD3-1 KV1591A-2 5 D2 1SS133 C4 27P(CH) 6 +B 3 C20 470P R11 56K C18 0.022 C17 0.047 C28 2.2/50 IC2 PIN NO.
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QT-CD161/141 IC202 PIN VOLTAGE NO. 0.1V 1 0V 2 11.2V 3 0V 4 11.3V 5 0V 6 0.1V 7 12V 8 10.4V 9 10 5.8V 11 0V 12 5.8V 13 10.4V PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 P18 5-A P16 1-F,P14 2-H +7.4V MONO/STEREO TUNED STEREO PLL(CLOCK) PLL(DATA) PLL(PERIOD) 12 24 25 26 29 30 31 +B 1 2 3 4 5 6 7 8 9 10 11 12 R540 1K XL501 4.19MHz R543 6.8K MAIN PWB-A1(4/4) 4 SL– SL+ RWC COIN CQCK RESET DRF PU IN WRQ SQ OUT P14 3-F 7 8 R542 3.
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QT-CD161/141 CD-C161 ONLY QT-CD141 ONLY P21 10-B FROM SPEAKER 3 CNS201 J201 HEADPHONES FW202 1 R227 A 1 2 3 R228 CNP101 1 2 3 4 C351 G A B D F FW201 1 2 3 TO TERMINAL PWB CNS602 C227 C229 C220 C226 C231 C232 C230 Q802 R842 16 15 20 B C E 25 5 C844 IC803 10 30 1 C849 R840 R819 C815 R820 R821 C816 R839 R830 R823 R822 R826 C808 C807 R806 R807 R809 R811 R808 C810 C806 R805 C804 C805 R804 R802 R803 C803 C801 R801 C802 13 10 15 CNS803 IC2 BR GY GY GY GY
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QT-CD161/141 SPEKERS SP502 R-CH P20 1-A TO HEADPHONES PWB (QT-CD161) SW601 TAPE MAIN (233-7) CNP602 1 2 3 TO TERMINAL PWB M601 TAPE MOTOR (233-6) CNS602 CNP201 P20 3-A TO MAIN PWB (QT-CD141) SP501 L-CH 1 WH 2 BK 3 RD CNS201 TAPE ERASE HEAD (233-5) RECORD/PLAYBACK HEAD(233-4) RD BK WH BR BK YL CNS101 4 3 2 1 11 W601 BK WH RD BK BK R842 PICK UP UNIT C848 B C E Q801 CNS801 6 1 BI801 R810 12 BK WH WH WH WH WH WH WH 1 2 3 4 5 6 7 8 5 4 3 2 1 8 7 6 5 4 3 2 1 7 R 09 10 C807 R806
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QT-CD161/141 (208) BATTERIES DC12V["D" size (UM/SUM-1, R20 or HP2) battery x 8] A T601 POWER TRANSFORMER (230) B PT YL D653 PT YL D652 ACSO OR RD BK CNS602 C653 C652 +B C654 GND D654 G D651 ACSO C651 RD RD SO601 AC SOCKET AC 120V 60Hz BK OR TERMINAL PWB-A3 C OR OR CNS602 BATTERIES DC3V["AA" size (UM/SUM-3,R6 or HP-7) battery x 2 for tuner memory] 3 2 1 P20 6-B TO MAIN PWB CNP602 (237) D BATTERY PWB-A4 BACK-UP BATTERY PWB-A5 E P20 1-E TO MAIN PWB P20 1-B TO MAIN PWB FW5
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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. Remove the cabinet and follow the troubleshooting instructions.
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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. Remove the cabinet and follow the troubleshooting instructions. "Track skipping and/or no TOC(Table Of Contents) may be caused by build up of dust other foreign matter on the laser pickup lens.
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QT-CD161/141 • 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. 25-1, 2)? Yes Check the periphery of IC801 pins 41 and 42.
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QT-CD161/141 • 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, IC803 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. 26).
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QT-CD161/141 FUNCTION TABLE OF IC IC501 RH-iX0016SJZZ (IX0016SJ): CD/Tuner Control Microcomputer (1/2) Pin No. Terminal Name Port Name Input/ Output Function 1,2 VL2 VL2 Input LCD bias setting power input terminal. 3 P67/AN7 LID-SW (CD) Input CD cover position detection SW input terminal. "L" = CD cover CLOSED, "H"= CD cover OPEN. 4 P66/AN6 CLOCK (TUNER) 5 P65/AN5 DATA (TUNER) Input/Output PLL IC serial data input/output terminal. Address 8 bits, sending/receiving 24-bit data.
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QT-CD161/141 IC501 RH-iX0016SJZZ (IX0016SJ): CD/Tuner Control Microcomputer (2/2) Pin No. Terminal Name Port Name Input/ Output Function 44* P14/SWG28 N.C No connect. 45* P13/SEG27 N.C No connect. 46* P12/SEG26 N.C No connect. 47* P11/SEG25 N.C No connect. 48 P10/SEG24 N.C No connect. 49 P07/SEG23 N.C No connect. 50 P06/SEG22 N.C No connect. 51 P05/SEG21 N.C No connect. 52 P04/SEG20 N.C No connect. 53 P03/SEG19 N.C No connect. 54* P02/SEG18 N.C No connect.
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QT-CD161/141 PARTS GUIDE MODEL QT-CD161(S) QT-CD141(BK) “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 .........
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QT-CD161/141 NO. PRICE RANK PARTS CODE DESCRIPTION INTEGRATED CIRCUITS VHITA7358AP-1 VHILA1805//-1 VHITC9216P/-1 VHIBA3311L/-1 J J J J AG AM AL AK FM Front End,TA7358AP FM/AF IF MPX.,LA1805 PLL,TC9216P REC./P.B.Equalizer Amp.,BA3311L Power Amp.,LA4597 Voltage Regulator,KIA7808P CD/Tuner Control Microcomputer,IX0016SJ Reset,PST9142 Servo Amp.
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QTCD161/141 NO.
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QT-CD161/141 NO.
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QTCD161/141 NO. PRICE RANK PARTS CODE DESCRIPTION NO.
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QT-CD161/141 306 701 A 704 304 701 302 B 702 C D 301 303 703x2 E M701 F 305 M702 305x2 G SW702 H PWB-B 1 2 3 4 Figure 5 CD MECHANISM EXPLODED VIEW –5– 5 6
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QT-CD161/141 601x4 602x2 203 210 A 212 209 234 PWB-A3 230 B 237 T601 601x2 208 602x4 PWB-A4 216 PWB-A5 226 211 SO601 603 225x2 202 C 603 PWB-A7 603x2 PWB-A2 227-2 233 (233-1, 233-2 233-3, 233-4, 233-5, 233-6, 233-7) 227 603x2 607x2 D 227-1 217 223 222 221 220 224 240 235 218 PWB-A6 606 SW507 219 603x4 228 214 603 607x2 608 603x3 E Silicon Grease CD MECHANISM 603x4 605x3 607 IC203 PWB-A1 603 IC202 604x3 607 201 231 F 215 603x2 213 SP501 232 603x6 LCD50
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QT-CD161/141 PACKING OF THE SET (FOR U.S.A. 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 SPAKC0063SJZZ Energy Star Label TLABZ0031SISC Feature Label FR ON T Operation Manual Energy Star Caustion Sheet TCAUZ0006SJZZ FR ON T Remote Control Packing Add.