Download Sharp QT-CD121H Service manual
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QT-CD121 SERVICE MANUAL No. S5831QTCD121/ QT-CD121 • 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 ........................................................................................................................................ 2 SPECIFICATIONS ............................................................................................................................................................. 2 NAMES OF PARTS ........................................................................................................................................................... 3 REMOTE CONTROL ......................................................................................................................................................... 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 ..................................................................................................................................................... 18 FUNCTION TABLE OF IC ................................................................................................................................................ 21 PARTS GUIDE/EXPLODED VIEW PACKING OF THE SET SHARP CORPORATION –1– This document has been published to be used for after sales service only. The contents are subject to change without notice. QT-CD121 FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL. IMPORTANT SERVICE NOTES 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. Inspect all protective devices such as insulating materials, cabinet, terminal board, adjustment and compartment covers or shields, mechanical insulators etc. 3. To be sure that no shock hazard exists, check for leakage current in the following manner. * Plug the AC line cord directly into a 120 volt AC outlet. * Using two clip leads, connect a 1.5k ohm, 10 watt resistor paralleled by a 0.15µF capacitor in series with all exposed metal cabinet parts and a known earth ground, such as conduit or electrical ground connected to earth ground. * Use a VTVM or VOM with 1000 ohm per volt, or higher, sensitivity to measure the AC voltage drop across the resistor (See diagram). * Connect the resistor connection to all exposed metal parts having a return path to the chassis (antenna, metal cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop across the resistor. VTVM AC SCALE 1.5k ohms 10W 0.15 µ F TO EXPOSED METAL PARTS TEST PROBE CONNECT TO KNOWN EARTH GROUND All check must be repeated with the AC line cord plug connection reversed. Any reading of 0.3 volt RMS (this corresponds to 0.2 milliamp. AC.) or more is excessive and indicates a potential shock hazard which must be corrected before returning the audio product to the owner. SPECIFICATIONS General Power source: Power consumption: Output power: Speakers: Output terminal: Dimensions: Weight: Tape recorder AC 120V, 60 Hz DC 12 V [ "D" size (UM/SUM-1, R20 or HP-2) battery x 8] 20 W FTC; 2.0 W min. RMS per channel into 8 ohms from 150 Hz to 20 kHz, with no more than 10 % total harmonic distortion. RMS; 2.3 W/CH (DC operation, 10 % T.H.D.) 4" (10 cm) wooferr x 2 Tweeter x 2 Headphones; 16-50 ohms (recommended 32 ohms) Width; 18-15/16" (480 mm) Height; 6-1/16" (153 mm) Depth; 10" (254 mm) 7.1 Ibs. (3.2 kg) without batteries Frequency response: Signal/noise ratio: Wow and flitter: Motor: Bias system: Erase system: Compact disc player Disc: Signal readout: Audio channels: Quantization: Filter: D/A converter: Wow and flutter: Compact disc Non-contact, 3-beam semiconductor laser pickup 2 16-bit linear quantization 4-tims oversampling digital filter 1-bit D/A converter Unmeasurable (less than 0.001% W. peak) Specifications for this model are subject to change without prior notice. Radio Frequency range: 50 - 14,000 Hz (Normal tape) 50 dB 0.25 % (WRMS) DC 12 V electric governor AC bias Magnet erase FM; 87.6 - 108 MHz AM; 530 - 1,702 kHz –2– QT-CD121 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: 2 1 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. Surround Button 17. (CD) Track Down/Review Button: 18. (CD) Track Up/Cue Button: 19. (CD) Stop Button: 20. (CD) Play/Repeat Button: 12 13 14 15 16 17 18 19 20 21 21. FM Telescopic Rod Aerial 22. Battery Compartment 23. AC Power Input Socket 24. Headphones Socket 22 3 1 1. (CD) Track Down/Review Button: 2. (CD) Pause Button: 3. (CD) Play/Repeat Button: 4. (CD) Track Up/Cue Button: 5. (CD) Stop Button: 24 23 4 2 5 REMOTE CONTROL Notes concerning use: Replace the batteries if control distance decreases or operation becomes erratic. Periodically clean the transmitter LED on the remote control and the sensor on the main unit with a soft cloth. Exposing the sensor on the main unit to strong light may interfere with operation. Change the lighting or the direction of the unit. Keep the remote control away from moisture, excessive heat, shock, and vibrations. Remote Sensor 15 15 8" - 20' (0.2 m - 6 m) 0,2 m - 6 m –3– QT-CD121 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. After servicing the unit, be sure to rearrange the leads where they were before disassembling. 4. Take suffcient care on static electricity of integrated circuits and other circuits when servicing. STEP PROCEDURE FIGURE 1 Rear Cabinet REMOVAL 1. Screw ................. (A1) x10 2. Socket .................. (A2) x1 4-1 4-2 2 Top Cabinet 1. Knob ..................... (B1) x1 (with CD Mechanism/ 2. Screw ................... (B2) x3 Tape Mechanism/ 3. Socket .................. (B3) x1 Main PWB) 4-2 3 Main PWB/ 1. Screw ................... (C1) x8 Switch PWB/ 2. Socket .................. (C2) x4 Headphones PWB 4-3 4-3,4-4 4 Tape Mechanism 1. Screw ................... (D1) x4 4-4 5 CD Mechanism 1. Screw ................... (E1) x3 4-4 6 Terminal PWB 1. Screw ................... (F1) x5 2. Hook ..................... (F2) x1 4-5 (C1)x7 ø3x10mm Switch PWB Main PWB Headphones PWB Top Cabinet (C1)x1 ø3x10mm Figure 4-3 (D1)x4 ø3x10mm (E1)x3 ø2.5x10mm Front Cabinet Tape Mechanism (C2)x2 Top Cabinet CD Mechanism (C2)x1 Figure 4-4 (A1)x6 ø3x20mm (F2)x1 (A1)x3 ø3x12mm Rear Cabinet (A1)x1 ø3x12mm Push Figure 4-1 Top Cabinet Driver (B1)x1 (F1)x2 ø3x10mm Spacer PWB (F1)x1 ø3x12mm (B2)x3 ø3x10mm Main PWB (A2)x1 Terminal PWB (B3)x1 Headphones PWB Front Cabinet (F1)x2 ø3x10mm Figure 4-5 Figure 4-2 –4– QT-CD121 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. CD Mechanism Pickup Shaft (A2) x1 Gear (A4) x1 Figure 5 –5– Stop Washer (A3) x1 QT-CD121 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 108.0 MHz: TC1 Specified Value MTT-114 Output: Speaker Terminal (CNP201 Load resistance: 8 ohms) Adjusting Point MTT-111 In motor Specified Value Instrument Connection 3,000 ± 90 Hz Output: Speaker Teaminal (CNP201 Load resistance: 8 ohms) Input: Pin 1 of IC1 Output: Pin 17 of IC2 Test Stage Instrument Connection Specified Value/Adjusting Point IF T3 Input: Antenna Output: Pin 19 of IC2 Band Coverage fL: L4 fH: TC4 600 kHz: L3 1,400 kHz: TC3 Input: Antenna Output: Speaker Terminal (CNP201 Load resistance: 8 ohms) Tracking TAPE SECTION • VCO Frequency Position of each switch or control Volume control Function switch X-BASS Iuput: Antenna Output: Speaker Terminal (CNP201 Load resistance: 8 ohms) • AM IF/RF • Tape Speed Test Tape Instrument Connection Max Tape/Power Off On Specified Value Adjusting Point 76 kHz ± 200 Hz VR1 • Bias Oscillation Adjustment Point L301 82 kHz ± 6 kHz Pin 2 of CNP201 • Playback Amplifier Sensitivity Check Test Tape Specified Value MTT-118 1.8 V ± 3 dB Pin 13, pin 21 and ground of IC2 Note: After preparing the test circuit shown in Fig. 6-1, connect the Pin 13, Pin 21 and ground of the IC2 with the test circuit, and measure the value. At this time, apply a standard unmodulated signal input and adjust the VCO. Instrument Connection Specified Value Instrument Connection Pin 13 of IC2 Instrument Connection Speaker Terminal (Load resistance: 8 ohms) G Pin 21 of IC2 D FET : 2SK19 or 2SK54 TO FREQUENCY COUNTER S MAIN PWB 10 kohm AM TRACKING fL FM ROD ATENNA Figure 6-1 VCO FREQUENCY TEST CIRCUIT VR1 VCO L AR A3 NTE NNA 13 FM DETECTION T2 17 19 IC2 T3 21 1 L4 AM B AM IF L2 IC1 TC4 T1 TC2 TC3 AM TRACKING fH fL fH AM BAND COVERAGE FM IF TC1 L1 fL fH FM TRACKING 1 fL fH FM BAND COVERAGE Figure 6-2 ADJUSTMENT POINTS –6– QT-CD121 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. When the CD LID switch is in the OFF position, the unit will be able to enter the test mode. However, playback cannot be performed in this mode. 2. You can only move the pickup. 3. The LCD display should be the same as it is for normal CD operations. 1 The use of the "UP/CUE" button will move the pickup to the outermost position. The use of the "DOWN/REVIEW" button will move the pickup to the innermost position. 2 When the "PLAY" button is pressed, the laser will be lit, and when the "STOP" button is pressed, it will be turned off. Playback will also start and stop when these buttons are pressed. a. If the "PLAY" button is pressed while in the stop mode, the laser will simply be turned on at first. b. If the laser is lit and the "PLAY" button is pressed again, playback will start from the current pickup position. c. If the "STOP" button is pressed, playback will stop. When pressed again, the laser will be turned off. 3 Turning the tracking servo on or off. a. Each time the PAUSE button is pressed during playback, the tracking servo will be turned on or off. (Note: If the PLAY button is pressed while in the stop mode, the tracking servo will automatically be turned on.) LCD MODE 2 1 1 second 3 3 1 second 12 3 * After the number has appeared in the display, each time the "UP/CUE" button is pressed, the display will switch in the following order: , , and then . SWITCH PWB-A2 SW774 TRACK DOWN/ REVIEW R771 3.9K REMOTE SENSOR RX771 SW773 TRACK UP/ CUE R772 2.7K TEST POINT R773 2.7K R774 2.7K 2 SW771 PLAY/ REPEAT 1 3 SW772 STOP R776 10K +B C779 10/16 Display While holding down the "STOP" button, move the FUNCTION/POWER switch to "CD". Then, release the "STOP" button and, within 0.5 second, press the REVIEW/DOWN button. R779 47 Start 4 1 TO CD SECTION Figure 7 –7– 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 EFMO IC802 EFMIN LCHO CLV+ LC78622E 13 CLV– SERVO/SIGNAL 14 V/P CONTROL 15 HFL 16 TES 17 TOFF 18 TGL 19 JP+ 20 JP– RES. CQCK. COIN SQOUT. RWC. WRQ 2 4 8 11 1 61 58 57 56 55 54 53 13 28 5 6 7 8 22 2 +7.4V CONSTANT VOLTAGE REGULATOR CL, DAT, SELIAL CONTROL 49 50 51 52 53 54 FOCUS/TRACKING /SPIN/SLIDE DRIVER 3 +5V 15 16 27 28 29 SLI SLC CV+ 10 12 6 45 44 23 43 +5V 62 XL801 16.93MHz 64 IC801 LA9240M SERVO AMP. Q805 LASER +5V DRIVER LDO VCC1 LCD701 CD LCD K1 XIN SL– DRF XOUT CD OPERATION KEY SW771~SW774 TO FD SPO SLEO SLD XOUT WRQ RESET XIN ~ VVDD VDD XVDD THLD/DEF CLK CL DAT CE DRF CD LID OPEN/CLOSE SW761 46 39 38 33 32 37 64 63 62 51 +7.4V (CD) R-CH GND (A) L-CH +7.4V (D) GND (D) 6 POWER GND 1 2 3 4 5 TO MAIN SECTION QT-CD121 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 REC TAPE RADIO M601 TAPE MOTOR SURROUND SW202 A,B 5 2 REG. 23 3 RF 1 22 CF 10.7MHz IC2 LA1805 FM / AM IF MPX. +B1 T1 FM IF EC / PB SW102 A,F POWER/ FUNCTION SW201-A,B 5 L C201 L201 REC REC P.B L2 FM OSC OSC IC1 LA1186N FM FRONT END RF AMP L3 AM BAR ANT. F1 B.P.F FM ROD ANTENNA 5 6 GND AM - IF SW203 A,B +B2 STANBY VR201 A,B AM / FM SELECT +B FM +B 14 10 5 11 6 R 2 L 8 TUNER +B TRIG. VCO ST. SWIT. FF ST. DRIV. 7 SP502 R-CH SPEAKERS SP501 L-CH AC 120V 60Hz AC INPUT SO651 FF FF VCC 21 TUNER +B BATTERY DC12V [' D' SIZE (UM/SUM-1, R20 or HP-2)BATTERYx8] 10 12 IC501 LA4597 POWER AMP. 9 DECODER PHASE DET. PILOT DET. 11 13 15 VR1 VCO T651 POWER TRANSFORMER 15 AM / FM SELECT +B 19 18 VOLUME 8 TU DRIV. SW201-C POWER/ FUNCTION +B1 12 D651~D654 RECTIFIER IC203 KIA7808P VOLTAGE REGULATOR SW601 MAIN SW201-D POWER / FUNCTION 7 1 X-BASS 4 AGC MUTE POST AMP. 20 17 T2 FM DET DET. DET. LEVEL - DBT. FM - IF 2 CP 455kHz IC201 KIA4558S 6 SURROUND AMP. L5 AM OSC 24 OSC MPX 3 T3 AM IF QT-CD121 QT-CD121 SWITCH PWB-A2 SW774 TRACK DOWN/ REVIEW Q805 S9012H +B REMOTE SENSOR RX771 C849 0.022 C848 1/50 3 C779 10/16 +B C840 0.33/50 R776 10K +B SW761 CD LID OPEN/CLOSE 4 1 4 1 C835 0.1/50 SW772 STOP C837 10/16 SW771 PLAY/ REPEAT R842 22 1 C838 0.01 2 C839 1/50 SW773 TRACK UP/ CUE R779 47 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 2.4V 16 0.4V 48 2.4V 17 0V 49 2.4V 18 0V 50 2.4V 19 0V 51 2.4V 20 0V 52 2.4V 21 5V 53 2.4V 22 2.5V 54 2.4V 23 2.5V 55 2.4V 24 0V 56 2.4V 25 5V 57 2.4V 26 5V 58 2.4V 27 0V 59 2.4V 28 0V 60 2.4V 29 5V 61 2.4V 30 4.8V 62 0V 31 0V 63 0V 32 3.8V 64 0V R774 R773 R772 R771 1.5K 1.8K 2.7K 3.9K A 10 11 12 13 14 15 16 R741 3.3K Q740 2SC1815 GR R744 R740 10K 4.7K VCC2 FSS CL DEF REFI CLK VR CE DAT LF2 DRF BH1 PH1 IC801 PIN VOLTAGE PIN VOLTAGE NO. NO. 23 2.5V 2.5V 1 2.5V 24 2.5V 2 2.5V 25 2.5V 3 2.5V 26 2.5V 4 2.5V 27 2.5V 5 28 2.5V 2.5V 6 29 2.5V 2.5V 7 2.5V 8 30 2.2V 2.5V 9 31 2.2V 10 2.5V 32 0V 11 2.5V 33 0V 34 5V 12 2.5V 35 5V 13 2.5V 36 4.8V 14 2.5V 37 0V 15 2.5V 38 5V 16 2.5V 39 0V 17 2.5V 40 0V 18 2.5V 41 1.5V 19 2.5V 42 2.4V 20 2.5V 43 2.5V 21 2.5V 22 0V 44 2.5V R743 100K R745 10K D741 1N4148 CD SIGNAL G PIN NO. 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 VOLTAGE 0V 2.5V 2.5V 0V 0V 2.4V 4.1V 4.7V 0V 0V 5V 5V 2.5V 2.5V 0.9V 0.9V 2.1V 4.2V 0V 5V C820 R826 0.0033 220K R827 220K C821 1/50 IC802 PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE NO. NO. NO. 23 5V 0V 1 45 2V 0V 24 0V 46 0V 2 1.5V 25 0V 3 47 0.1V 0V 26 0V 48 2.2V 4 2V 27 0V 49 0V 5 28 0V 5V 6 50 2.5V 29 0V 0.3V 7 51 0V 0V 8 30 5V 52 2.5V 2.5V 9 31 2.5V 53 0V 54 2.5V 10 32 0V 0V 55 0V 11 0V 33 0V 34 0V 56 4.1V 12 0V 35 5V 57 4.1V 13 0V 36 4.7V 58 5V 14 5V 37 2V 59 0V 15 0V 38 0V 60 2.7V 16 4.8V 39 0V 61 2.4V 17 5V 40 2V 62 0V 18 5V 41 4.7V 63 0V 19 0V 42 0V 64 0V 20 0V 43 5V 21 2.5V 44 2.3V 22 0V MAIN PWB(2/2) H • The numbers 1 to 12 are waveform numbers shown in page 17. 1 2 3 4 Figure 10 SCHEMATIC DIAGRAM (1/4) – 10 – 5 C83 27P (CH R810 82K +B C741 3.3/50 R832 56K R836 47K SL+ JP– SLD R824 10K C819 47/16 SL– SPD SLEQ SP– C816 0.001 R822 6.8K R833 5.6K 30 31 32 R825 1.2K R815 C814 R816 47K 0.01 1.5K 29 R821 56K R817 82K 27 28 5V DIGITAL GND PU IN WRQ SQOUT DRF SL– SL+ RWC CO IN CQCK RES R742 1K C850 0.1 C822 220P TOFF 35 34 33 +B +B C845 4.7/50 R835 470 CV+ 40 CV– 39 SLOF 38 HFL 37 TES 36 R715 15K R727 1K D740 1N4148 25 26 C811 0.1 R736 1K R721 15K R724 15K 24 R840 22K X701 4MHz +B R716 10K VREF 21 22 23 C812 330P C830 2P (CH) R831 1K R713 1K R839 22K RFSM 41 34 TGL 33 JP+ C818 1/50 GND SLC 43 RFS– 42 TD 13 JP 14 R812 C813 R828 15K 0.1 1K R829 1K +B R718 15K R719 15K R720 15K R722 15K R723 15K R725 15K C810 180P R813 33K C705 0.022 C740 0.01 15 TO 16 FD 12 TD– 15 16 +B R726 1K R728 1K R729 1K R731 1K R732 1K R733 1K F C808 0.068 17 18 19 20 R714 10K C704 100/10 R730 1K P33 COM2 COM3 VLC1 VLC2 VLC3 KIDSW AIN7 SIMUKE AIN6 AIN5 P3P40 VSS XOUT XIN 18 SQOUT P21 RESET 17 DFR P20 PU-IN P23 WRQ P22 1 2 3 4 5 6 7 8 9 E XCOUT VDD 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 R734 1K P00 P01 P02 P10 POWER IN SEG2 SEG1 SEG0 IC701 IX0105AW SYSTEM MICROCOMPUTER VREF AVSS XCIN D3 RES D4 COCK D5 COIN D6 RWC D7 SL+ D8 SL– SEG7 SEG6 SEG5 SEG4 SEG3 32 P32 31 P31 30 P30 D1 MUTE SEG10 SEG9 SEG8 SEG16 COM0 COM1 SEG12 SEG11 SCI 10 TH TA 11 R811 3.3K 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 9 C833 0.001 IC801 LA9241M SERVO AMP. C817 0.47/50 R830 1K D TESI SPG R711 2.7K 8 48 NC C834 0.033 R820 10K R710 10K C809 0.047 R808 12K TE R871 4.7K TBC 47 FSC 46 GND 45 SLI 44 R823 1.2K R807 1K R809 27K R709 1K R712 1K TE– 7 50 49 FIN2 FIN1 SP 1 6 1 2 C815 0.0047 2 E F TB A GND 3 2 3 4 5 NC 4 56 55 54 53 52 51 FE– 5 C806 0.033 R806 100 57 R819 39K 6 C807 0.1/50 R805 6.8K 58 R814 10K 7 R708 1K 8 C701 0.022 C702 0.022 +B C805 0.033 59 FE LCD701 R802 100K R804 2.2K 61 60 FA– C804 0.001 62 FA C R803 15K 63 FD– C803 0.1/50 64 LDS 1 LDD 2 1 VCC1 FW701 6 +B F E B A K C802 47/16 R801 1K 47 44 C868 R874 10/16 100 TEST3 LVDD 36 MUTEL 35 34 DOUT 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 C870 0.0022 R875 R876 10K 10K C867 10/16 LVSS 38 LCHO 37 C2F EMPH CONT5 CONT4 CONT3 CONT2 CONT1 B F +B +B RVSS 39 R873 100 C869 0.0022 C890 100/10 33 R880 100 24 25 26 27 28 29 30 31 32 SL+ JP– 17 18 19 20 21 22 23 K E A E A B F XL801 16.93MHz XVSS 46 XIN 45 34 NC 33 TEST4 15 HFL 16 TES BI801 TR+ TR– FO– FO+ PW SFSY FSX SBCK RWC WRQ COIN SQOUT RES CQCK 16M TST11 4.2M CS 12 CLV+ 13 CLV– 14 V/P– 15 16 C822 220P TOFF 35 34 33 48 EFLG 47 SBSY MON K 48 43 IC802 42 41 LC78623D SERVO/SIGNAL CONTROL RCHO 40 Vss 1 2 3 4 5 6 7 8 53 52 51 50 49 VVDD FR EMFO 10 EMFIN 11 TEST2 R834 1K C831 0.0027 55 54 VDD R835 470 CV+ 40 CV– 39 SLOF 38 HFL 37 TES 36 SL– C832 27P (CH) 57 56 XOUT XVDD MUTER RVDD FSEQ R832 56K R837 47K DEFI TAI VVss ISET PCK C830 2P (CH) R857 27K 6 7 R856 1.2K 8 9 1 2 PDO JP– RFSM 41 R833 5.6K R836 47K 4 5 +B +B 62 61 60 59 58 JP+ SLC 43 RFS– 42 C842 0.047 R838 33K C834 0.033 C833 0.001 1 C841 2 0.047 3 TEST1 R858 680 TBC 47 FSC 46 GND 45 SLI 44 TGL C845 4.7/50 64 63 TOFF CLK DEF 48 NC C850 0.1 TEST5 +B R871 4.7K 5 4 3 2 1 LD 1 VR C C801 0.01 R860 1K C847 0.01 5 4 3 2 1 LD PD CNS801 +B 50 49 5 4 3 2 1 CNS802 BI802 QT-CD121 30 31 32 L801 0.82µH +B D802 1N4148 C843 100/10 C873 0.01 TR+ TR– FO– FO+ +B R849 100K R810 82K R827 220K R826 0.0033 220K +B C851 0.022 CNP803 1K C821 1/50 NC NC MUTE 29 2.5V 2.5V Q804 R877 220 7.4VS8050D4.8V +B R878 5.5V 100 +B VOLTAGE 2V 0V 0.1V 2.2V 0V 2.5V 0V 2.5V 0V 0V 0V 4.1V 4.1V 5V 0V 2.7V 2.4V 0V 0V 0V -3.2V 9 VIN2' VIN2 10 VO2+ 11 VO212 GND 0V 13 14 OP OUT C889 10/16 SL– PU-IN VIN4' 24 2.5V 7.4V BIAS IN 23 VCC 22 30 VCC 21 +B 6 6 6 5 5 5 4 4 4 3 3 3 2 2 2 1 1 1 M M701 SPINDLE MOTOR M M702 SLED MOTOR SW702 PICKUP IN CD MOTOR PWB-B +B 7.4V VIN3' 20 19 VIN3 VO3+ 18 VO3– 17 2.7V 3.8V 3.2V OP IN + 16 OP IN - 15 ZD801 MTZJ5.6B C887 0.022 SL+ +B L802 0.68µH POWER GND DIGITAL GND DIGITAL +7.4V L-CH AUDIO GND R-CH GE PIN NO. 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 +3.8V 0V 8 GND SP– 3.5V 3.5V 2.5V BI803 VIN1' SP+ 0V CNS803 VO4– 27 VO4+ 26 VIN4 25 0V C846 330/10 GND 28 VO1+ VIN1 C844 330/10 4 0V 5 0V 6 0V 7 VO1- 0V 3.5V 1 3.5V 2 2.5V 3 IC804 BA5914FP FOCUS/TRACKING/SPIN/SLIDE DRIVER +B 6 5 4 3 2 1 P12 1 - E TO MAIN SECTION • NOTES ON SCHEMATIC DIAGRAM can be found on page 16. 7 8 9 10 Figure 11 SCHEMATIC DIAGRAM (2/4) – 11 – 11 12 QT-CD121 A R5 330K CF2 C28 0.0015 (Styrol) VCO AM/FM 12 C203 10/16 C35 1/50 C21 0.022 C33 1/50 C34 1/50 R13 3.9K R14 3.9K VC4 P11 7 - H TO CD SERVO/ DISPLAY SECTION C202 0.0056(ML) SW201-B CD AUTO FM AM TAPE R16 2.2K C36 0.022 C204 10/16 fH fL AM BAND COVERAGE R456 15K 1 2 3 4 5 6 R201 100K R234 4.7K R17 68 SW201-A CD AUTO FM AM TAPE R15 2.2K L4 AM OSC. R-CH AUDIO GND L-CH CD +7.4V DIGITAL GND POWER GND R203 10K R202 100K fH AM fL TRACKING TC4 R458 R457 1.2K 1.2K R233 4.7K CF1 TC3 D C201 0.0056(ML) 11 R38 1.8K C31 0.022 2 R-CH MO/ST 3 C32 1 VCO MPX VCO CK 76kHz 13 10 9 8 0.022 +B 6 7 14 VC3 220P C11 5 C26 4 22/16 AM IF 3 T3 2 L3 AM BAR ANT. C17 0.022 GND AM IN 2 AGC C20 0.022 T1 C10 FM IF 0.022 R7 390 VR1 6.8K (B) R29 15K C27 3.3/50 18 17 16 15 IC2 LA1805 FM/AF IF MPX. 1 3 R9 22K C15 0.022 C23 0.01 R8 3.9K 1 19 AM OUT R25 120 20 FM DET C6 15P (RH) C25 3.3/50 T2 24 20 22 21 R3 47 C9 0.0047 C16 0.0047 C5 33P (CH) R27 33K R11 1.2K C24 470P AM IF VC1 R1 10 C 4 AM RF 8 R2 33 C2 0.001 C4 22P (CH) TC1 L1 FM ANT. 3 5 9 6 AM MIX PIN VOLTAGE NO. 0.9V 1 1.6V 2 6.8V 3 0V 4 0V 5 6.8V 6 1.4V 7 6.2V 8 6.8V 9 FM DET AM FM IF IN OSC STB 2 FM TRACKING fL fH FM OSC. L2 IC1 7 C38 C22 0.022 0.0039 C37 220/10 C39 0.022 FM BAND COVERAGE fH fL C29 10/16 D1 1N4148 C14 0.022 VC2 1 R6 820K OSC MIX IC1 LA1186N FM FRONT END RF AMP. 1 2 3 B C8 4P (CH) TC2 F1 B.P.F. DET OUT MPX IN L-CH ROD ANTENA R455 15K E C105 0.0018 R103 12K 3 3 4 4 C107 820P C111 330P 3 NF1 5 IN1 R R P P SW102-D SW102-E C106 0.0018 R R110 120 R119 3.3K OUT1 8 IC101 VCC BA3311L FILTER 10 REC./P.B. EQUALIZER AMP. GND 6 7 C114 47/16 R108 1K 1 PRE AMP 9 IN2 NF2 4 C110 11 270P C112 330P C108 820P ERASE HEAD G C109 270P C116 0.018 (ML) ALC T 2 OUT2 12 C118 10/16 R116 3.9K R125 680K R118 R120 3.9K 3.3K R114 8.2K P SW102-H D103 1N4148 C123 100/10 SW102-G P R SW102-F P R R122 1.5K R106 15K R124 3.3K C351 0.0022 (ML) R351 330 L301 47K 150 R352 R35 C352 220/10 H • NOTES ON SCHEMATIC DIAGRAM can be found on page 16. 1 2 3 4 Figure 12 SCHEMATIC DIAGRAM (3/4) – 12 – 5 6 C353 0.022 (ML) C354 0 0056 2 R107 1K D101 1N4148 1 2 SW102-B P R123 3.3K P C121 0.01 D102 1N4148 R-CH 1 R P R C119 2.2/50 L-CH R SW102-A R117 3.9K R115 3.9K C113 47/16 NC CNS101 F SW102-C CNP101 TAPE RECORD/PLAYBACK HEAD R109 120 330 R101 C120 47/16 330 R102 R121 1.5K C115 R113 0.018(ML) 8.2K C122 0.01 R105 15K C117 10/16 R104 12K QT-CD121 6 R208 12K C210 4.7/50 5 R234 4.7K C212 100/10 7 R218 22K R216 2.2K 4 IC201-2 KIA4558S SURROUND AMP. C214 0.039 (ML) 4 C224 100/10 VOLUME 7 C225 220/25 3 R222 1K C222 0.0015 11 C232 0.1 (ML) 9 – + 10 6 C220 0.047 (ML) 5 J201 HEADPHONES 1 2 2 3 3 SP502 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 C234 1000/10 8 D201 1N4148 1 SPEAKERS SP501 L-CH C231 0.1 (ML) 13 R-CH C223 100/10 CNS201 C233 1000/10 CNP201 + – C229 100/10 C217 0.0027 SW202-B R220 3.3K 12 1 VR201-A 20K (B) C215 0.039 SW202-A (ML) R219 3.3K 5 1 2 C221 0.0015 C230 100/10 C204 10/16 R210 22K R206 4.7K C219 0.047 (ML) IC202 LA4597 POWER AMP. C202 0.0056(ML) R204 10K C208 4.7/50 5 1 C226 0.022 C206 0.0018 R202 100K C207 4.7/50 R217 22K C216 0.039(ML) C205 0.0018 R228 120 AM SIGNAL FM SIGNAL CD SIGNAL PLAYBACK SIGNAL RECORD SIGNAL R221 1K C218 0.0027 R209 22K R213 22K R201 100K R214 22K R205 4.7K R227 120 1.2V (0V) 1.9V (1.6V) 1V (1.3V) 1.7V 1.5V (1.7V) 1.5V (1.5V) 0.4V (0.4V) 6.1V (6.4V) 6.1V (6.4V) 1.6V 1.6V 1.6V ( ): AM FW202 R207 12K R211 C211 10K 47/16 R233 4.7K 2 R203 10K HEADPHONES PWB-A4 MAIN PWB-A1(1/2) VOLTAGE X-BASS C213 0.039 R215 (ML) 2.2K 1 R212 10K C201 0.0056(ML) C203 10/16 IC2 PIN NO. 1.6V 13 1.6V 14 6V (6.3V) 15 0.2V (0.7V) 16 1.6V 17 0V 18 0V 19 0V 20 2.5V 21 2.5V 22 5.1V (6.6V) 23 0.8V (1V) 24 VOLTAGE VR201-B 20K(B) SW202 SURROUND IC201-1 KIA4558S SURROUND AMP. R231 330 C209 8 4.7/50 3 VCO kHz PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 C227 3300/25 +B +B 1N4148 1N4148 TERMINAL PWB-A3 R351 330 C352 220/10 C353 0.022 (ML) C354 0.0056 (ML) Q351 <3V> S8050D 47K 150 R352 R353 <0.7V> 7 <0.1V> R354 10 C651 0.022 D652 1N4004 C652 0.022 CNS602 D651 1N4004 C654 0.022 D653 1N4004 AC INPUT +B BATTERYS DC12V["D"size(UM/SUM-1, R20 or HP2)battery x 8] PIN VOLTAGE NO. 1 <0V> [3.23V] 2 <0V> [0V] 3 <0.6V> [0.6V] 4 <0V> [0V] 5 <0V> [0V] 6 <0V> [0V] 7 <0V> [0V] 8 <7.43V> [7.43V] 9 <0V> [0V] 10 <7.37V> [7.37V] 11 <0.6V> [0.6V] 12 <3.3V> [3.3V] < >: Recording [ ]: Play SW601 (241-7) MAIN R230 2.7 +B + +B – 8 SO651 +B IC101 SW102-G P R 1 2 D654 1N4004 1 2 C653 0.022 CD FM AUTO AM TAPE IC203 KIA7808P SW201-C VOLTAGE REGULATOR 11.83V 3 OUT IN 1 8V C302 C301 2 0V 0.022 0.022 SW201-D +B CD FM AUTO AM TAPE CNP602 D309 D308 T601 POWER TRANSFOMER 9 10 Figure 13 SCHEMATIC DIAGRAM (4/4) – 13 – M 11 M601 (241-6) TAPE MOTOR 12 QT-CD121 HEADPHONES PWB-A4 R352 R106 R102 C106 R116 R114 R122 CNP602 R124 C844 C889 ZD801 R810 C849 R820 C815 R819 C811 C812 R816 C814 R815 R814 R828 R817 C848 E C B 12 10 1 8 C807 C809 R812 R806 C808 R807 R811 R809 R808 C810 5 1 CNS802 BK WH WH WH WH 5 BI802 R805 C806 C804 R803 R802 R804 C805 1 C801 C802 16 10 C839 BR BK 1 BK 2 3 BK 4 BK 5 BK 6 BK 7 BK 8 Q805 17 C803 C850 C813 20 15 IC801 55 C840 R842 R830 R840 C816 R839 R821 C822 25 64 CNS801 8 BI801 35 30 45 50 60 C838 IC804 C818 R822 R823 C817 1 R827 R826 C830 R834 R835 R837 C831 R871 R838 1 R813 40 48 7 28 R829 C846 C819 R831 R833 C832 R832 C841 C842 R857 R856 R858 22 7 8 29 33 32 49 R716 R825 R824 C843 C873 R878 R877 C867 L802 1 C845 R742 C741 5 C835 R740 D740 R741 30 C820 C837 R743 C833 R836 C834 E C740 R849 Q740 C847 R725 R726 R728 R723 R729 R722 R731 R720 R732 R719 R733 R718 1 ECB R745 R744 D741 64 R860 R734 5 64 60 R730 R721 16 10 60 17 16 10 17 20 15 IC701 55 20 15 IC802 55 C821 49 49 C851 45 50 45 50 R727 25 40 48 R873 C868 XL801 X701 Q804 25 40 48 B C E 14 21 L801 35 30 R715 R736 R724 35 30 33 32 D802 33 32 R880 C890 C704 R711 6 15 COR801 R712 R714 C705 C702 R874 C869 R709 R713 D LCD701 R456 R875 C887 R455 C870 R876 C301 R457 R458 R230 IC203 C302 C701 C114 D103 R120 C122 C230 C225 D201 TAPE OFF POWER 1 2 3 B R710 C116 R108 C108 C232 IC202 ON AM SW201 FUNCTION FM AUTO CD SW202 SURROUND A R708 R110 C110 C112 C119 C226 SW203 X-BASS B 8 7 6 5 4 3 2 1 1 2 C231 C222 C224 1 2 3 4 5 6 7 8 9 10 11 12 13 D R118 C117 R231 C221 C223 C214 C213 C Q351 C220 C212 C219 A IC101 C118 R101 R107 C107 R109 C109 C113 C115 R121 C111 R104 R103 C234 B C E C354 C229 R215 R216 B C353 C233 C206 C208 C211 R218 R217 R234 R219 R233 R212 R204 R206 C123 REC F C227 R208 C210 C205 R210 D102 R211 C215 A R209 C207 R205 R222 A VR201 VOLUME C217 1 C121 R125 C120 C209 C202 R202 R221 C218 1 2 3 4 5 6 7 8 R115 R113 C201 R201 B R203 D 1 3 5 7 9 11 2 4 6 8 10 12 D101 C216 R220 B IC201 R119 R123 C203 R207 R213 R214 C204 5 R117 C105 R105 FW202 B L301 P.B A 1 R351 SW102 C352 G R228 R227 C C351 H R353 E R801 A 1 2 3 4 CNP101 C R354 1 2 3 CNP201 FW202 5 J201 HEADPHONES 9 D309 R17 D308 T1 C20 BK TC3 C11 VC4 C38 R14 R38 R16 C28 C39 R29 C27 L4 C35 VC3 C36 VCO R6 TC2 TC1 SW772 STOP VR1 C16 R772 C25 R25 C14 L2 VC2 R11 VC1 1 C779 R771 G 4 TRACK UP/CUE C6 T2 TRACK DOWN/ REVIEW C5 C4 L1 FW701 R8 C8 C9 SW773 IC2 24 23 22 21 2019 18 17 16 15 14 13 C23 R27 R1 F1 SW774 CF1 R2 R5 C34 C32 C37 2 3 4 5 6 7 8 9 C2 1 C29 1 2 C33 C31 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 C15 SWITCH PWB-A2 R9 IC1 3 1 2 3 C24 C17 C26 C10 R3 R7 2 1 2 3 4 5 6 T3 6 BI803 3 R13 R15 1 BK CF2 F COR1 C21 FW701 C22 5 4 SW761 CD LID OPEN/CLOSE CNS803 BR GY GY GY GY GY 1 4 11 1 2 3 4 5 TC4 R774 R773 R776 R779 SW771 PLAY RX771 3 2 1 H L3 AM BAR ANTENNA D1 MAIN PWB-A1 • The numbers 1 to 12 are waveform numbers shown in page 17. 1 2 3 4 Figure 14 WIRING OF P.W.BOARD (1/2) – 14 – 5 6 QT-CD121 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 2 1 D654 D651 SO651 AC SOCKET AC 120V 60Hz CNS602 C651 OR OR PICK UP UNIT CD MOTOR PWB-B - 5 4 3 2 1 + 8 7 6 5 4 3 2 1 SW702 SPENDLE MOTOR M701 CNP803 PICKUP IN F3895AF SLED MOTOR M702 6 5 4 3 2 1 - + FM ROD ANTENNA(213) 7 8 9 10 Figure 15 WIRING OF P.W.BOARD (2/2) – 15 – 11 12 QT-CD121 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. As to electrolytic capacitor, the expression “capacitance/withstand voltage” is used. (CH), (TH), (RH), (UJ): Temperature compensation (ML): Mylar type (P.P.): Polypropylene type • The indicated voltage in each section is the one measured by Digital Multimeter between such a section and the chassis with no signal given. REF. NO DESCRIPTION 1. Tuner ( ): AM mode Marking except for ( ): FM mode 2. CD ( ): Play mode Marking except for ( ): Stop state 3. Deck section ( ): Record mode Marking except for ( ): Playback mode Display / Control section: ( ): Active state Marking except for ( ): CD Function mode at stop state • Schematic diagram and Wiring Side of P.W.Board for this model are subject to change for improvement without prior notice. • Parts marked with “ ”( ) are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the safety and performance of the set. POSITION REF. NO DESCRIPTION POSITION SW102 RECODE/PLAYBACK OFF—ON SW702 SW201 FUNCTION/POWER TAPE—AM— FM AUTO—CD/ OFF—ON SW761 CD LID OPEN/CLOSE OFF—ON SW771 PLAY/REPEAT OFF—ON SW772 STOP OFF—ON SW773 TRACK UP/CUE OFF—ON SW774 TRACK DOWN/REVIEW OFF—ON SW202 SURROUND OFF—ON SW203 X-BASS OFF—ON SW601 TAPE MAIN OFF—ON PICKUP IN OFF—ON FRONT VIEW E C B (S) (G) (D) (1) (2) (3) 2SC1815 GR Figure 16 TYPES OF TRANSISTOR – 16 – QT-CD121 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 5.0 V TES 2 REVIEW 3 REVIEW PLAY NORMAL DISC TN0=01 1 6 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 2 3 PLAY TCD-712 (140mm) TN0=01 CUE PLAY TCD-712 12 5s 100mV SLD 1 12 0.5s 100mV SLD 1 – 17 – QT-CD121 TROUBLESHOOTING 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. Before attempting any adjustment make certain that the lens is clean. If not, clean it as mentioned below." Turn the power off. Gently clean the lens with a lens cleaning tissue and a small amount of isopropyl alcohol. Do not touch the lens with the bare hand. • The CD function will not work. The CD operating keys don't work. Yes Check the CD, DPS microcomputer (IC701), power supply, 4.19 MHz and 16.93 MHz clock, and reset terminal. Yes Check the waveform of SCK, SO (DATA) and SI (COMM). Yes See if the pick-up is in the pick-up in SW702 position. Yes If the items mentioned above are OK, check the main microcomputer IC701. • The CD operating keys work. Check the Focus - HF system. Playback can be performed without a disc. Yes Does the pick-up move up and down twice? Focus search OK. Yes No Does the output waveform of IC801(16)(FD) match that shown in Fig. 18? Check the area around IC804-BI801/CNS801. Yes No Check the IC801(50)(CLK) line, 4MHz. Check the microcomputer data on pins (51)(CL), (52)(DAT) and (53)CE. Focus search is performed two times when play operation is done without disc. 0.5s 0.50 V IC801 16 FD 0.5s 0.50 V IC801 15 TD 1 2 Figure 18 – 18 – QT-CD121 • 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. Yes Check the tracking system. HF 0.1V/DIV 0.5µsec/DIV(DC) (When playing back the disc) ▼ Waveform is unstable. Check the spin system. Waveform in case of normal playback 0.5s 1.00 V IC801 16 FD 0.5s 10.0 V IC801 12 CLV+ 2 1 3 0.5s 10.0 V IC801 54 DRF 4 0.5s 2.00 V IC801 7 TE Figure 19-1 Figure 19-2 • Check the tracking system. Check waveform of IC801 pin 7 (TE). The waveform shown in Fig. 19-3 appears, and no-disc state appears soon. Play is possible in TEST mode. Yes Tracking servo is inoperative. Yes Although IL is possible, play is impossible. Yes Data cannot be read. Yes Yes Normal jump is impeded, and the program top cannot be reached. Check the VCO-PLL system. 5ms 1.00 V IC801 7 TE 4 5 ms 5.0 V IC801 54 DRF 3 Figure 19-3 – 19 – Check the periphery of IC801 pin 8 to pin 15, and IC804 to BI801/CNS801. Yes Check the periphery of IC801 pin 14. QT-CD121 • 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). Error Check the IC801 pins 43 and 44, IC802 pins 3, 5, 7, 9 and 10. 0.5s 1.00 V IC802 3 PDO 2 0.5s 1.00 V IC801 16 FD Stop --> Play As VCO frequency is locked at 4.32 M Hz, voltage of PDO rises and stabilizes. 3 Figure 20 • Although HF waveform is normal and the time indication is normal, no sound is emitted. Check IC802 pin 48 (EFLG). No Yes Check IC802 pins 37and 40. Abnomal Check the periphery of IC803 (OPAMP). – 20 – Usually, the number of pulses of flawless disc is 100 pulses/sec or less. QT-CD121 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. 2*-5* P10-P13 POWER-IN, DATA (VOL), STB (VOL) 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 CK (VOL), 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. 6* D0 POWER-ON Input/Output Each terminal can be used to input or output 1 bit at a time. The output section has a latch which holds 1 bit. One of the D ports is assigned by register Y as a data point, to execute input or output. To use the port for input, set the output latch for that bit to "1". All of the output latches on port D can be set to "1" using the CLD command. 7 D1 MUTE Input/Output Each terminal can be used to input or output 1 bit at a time. The output section has a latch which holds 1 bit. One of the D ports is assigned by register Y as a data point, to execute input or output. To use the port for input, set the output latch for that bit to "1". All of the output latches on port D can be set to "1" using the CLD command. 8*-12 D2-D6 SYNC-OUT, RES,CQCK, COIN,REC Input/Output Each terminal can be used to input or output 1 bit at a time. The output section has a latch which holds 1 bit. One of the D ports is assigned by register Y as a data point, to execute input or output. To use the port for input, set the output latch for that bit to "1". All of the output latches on port D can be set to "1" using the CLD command. 13,14 D7,D8 SL+,SL- Input/Output Each terminal can be used to input or output 1 bit at a time. The output section has a latch which holds 1 bit. One of the D ports is assigned by register Y as a data point, to execute input or output. To use the port for input, set the output latch for that bit to "1". All of the output latches on port D can be set to "1" using the CLD command. 15*,16* D9,D10 SRS2,SRS1 Input/Output Each terminal can be used to input or output 1 bit at a time. The output section has a latch which holds 1 bit. One of the D ports is assigned by register Y as a data point, to execute input or output. To use the port for input, set the output latch for that bit to "1". All of the output latches on port D can be set to "1" using the CLD command. 17 P20 DRF Input/Output Used to receive 4 bits at a time. 18 P21 SQOUT Input/Output Used to receive 4 bits at a time. 19 P22 WRQ Input/Output Used to receive 4 bits at a time. 20 P23 PU-IN Input/Output Used to receive 4 bits at a time. 21 RESET 22 XIN 23 XOUT 24 VSS — 25 VDD — 26* XCOUT 27 XCIN 28 AVSS Input GND input terminal for the A-D converter. 29 VREF Input Reference voltage input terminal for the A-D converter. 30 P30 REMOCONINT2 Input Used to receive 4 bits at a time. 31 P31 TORAY1 Input Used to receive 4 bits at a time. 32 P32 TORAY2 Input Used to receive 4 bits at a time. 33 P33 Input Used to receive 4 bits at a time. 34 P40 Input Used to receive 4 bits at a time. 35-37 AIN5-AIN7 Input Used to receive 4 bits at a time. 38-40 VLC3-VLC1 Input LCD power input terminals. To use the internal resistor, connect VLC3 to VDD (if a brightness control is needed, connect VLC3 to VDD through a resistor). When an external power supply is used, applyvoltages as follows: 0<VLC1<VLC3<VLCD<VDD. 41-44 COM3-COM0 Output LCD common output terminals. 45-61* SEG16-SEG0 (45*-56*) Output LCD segment output terminals. 62*-64* P00-P02 Input/Output Reset pulse input/output terminal. When a reset is caused by the watch dog timer, an "L" level will be output. The output is an N channel open drain. Input Input/output terminals for the main clock generation circuit. Used by connecting a ceramic resonator between the XIN and XOUT terminals. There is a built-in feedback resistor between the XIN and XOUT terminals. Output Input/output terminals for the main clock generation circuit. Used by connecting a ceramic resonator between the XIN and XOUT terminals. There is a built-in feedback resistor between the XIN and XOUT terminals. GND input terminal. Positive power supply terminal. Output Input/output terminals for the sub clock generation circuit. Used by connecting a crystal oscillator between the XCIN and XCOUT terminals. There is a built-in feedback resistor between the XCIN and XCOUT terminals. Input Input/output terminals for the sub clock generation circuit. Used by connecting a crystal oscillator between the XCIN and XCOUT terminals. There is a built-in feedback resistor between the XCIN and XCOUT terminals. 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. In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside. – 21 – QT-CD121 —MEMO— – 22 – QT-CD121 PARTS GUIDE MODEL QT-CD121 “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 ....................... Ceramic type VCK ........................ Ceramic type VCT ........................ Semiconductor type VC • • MF ............... Cylindrical type (without lead wire) VC • • MN ............... Cylindrical type (without lead wire) VC • • TV ................ Square type (without lead wire) VC • • TQ ............... Square type (without lead wire) VC • • CY ............... Square type (without lead wire) VC • • CZ ............... Square type (without lead wire) VC • • • • • • • • • J .. The 13th character represents capacity difference. ("J" ±5%, "K" ±10%, "M" ±20%, "N" ±30%, "C" ±0.25 pF, "D" ±0.5 pF, "Z" +80-20%.) VRD ....................... Carbon-film type VRS ........................ Carbon-film type VRN ....................... Metal-film type VR • • MF ............... Cylindrical type (without lead wire) VR • • MN ............... Cylindrical type (without lead wire) VR • • TV ................ Square type (without lead wire) VR • • TQ ............... Square type (without lead wire) VR • • CY ............... Square type (without lead wire) VR • • CZ ............... Square type (without lead wire) VR • • • • • • • • • J .. The 13th character represents error. ("J" ±5%, "F" ±1%, "D" ±0.5%.) If there are no indications for the electrolytic capacitors, error is ±20%. If there are no indications for other parts, the resistors are ±5% carbon-film type. NOTE: Parts marked with “ ” are important for maintaining the safety of the set. Be sure to replace parts with specified ones for maintaining the safety and performance of the set. – 23 – QT-CD121 NO. PRICE RANK PART CODE DESCRIPTION INTEGRATED CIRCUITS IC1 IC2 IC101 VHILA1186N/-1 VHILA1805//-1 VHIBA3311L/-1 J J J IC201 IC202 IC203 IC701 VHIKIA4558S-1 VHILA4597//-1 VHIKIA7808P-1 RH-IX0105AWZZ J 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 AK Surround Amp.,KIA4558S AH Power Amp.,LA4597 AH Voltage Regulator,KIA7808P BA System Microcomputer, IX0105AW AS Servo Amp.,LA9241M AY Servo/Signal Control,LC78623D AN Focus/Tracking/Spin/Slide Driver,BA5914FP TRANSISTORS Q351 Q740 Q804 Q805 VSS8050D///-1 VS2SC1815GR-1 VSS8050D///-1 VSS9012H///-1 J J J J AC AB AC AC Silicon,NPN,S8050 D Silicon,NPN,2SC1815 GR Silicon,NPN,S8050 D Silicon,PNP,S9012 H VHD1N4148//-1 VHD1N4148//-1 VHD1N4148//-1 VHD1N4148//-1 VHD1N4004//-1 VHD1N4148//-1 VHD1N4148//-1 VHEMTZJ5R6B-1 J J J J J J J J AA AA AA AA AB AA AA AD Silicon,1N4148 Silicon,1N4148 Silicon,1N4148 Silicon,1N4148 Silicon,1N4004 Silicon,1N4148 Silicon,1N4148 Zener,5.6V,MTZJ5.6B RFILF0001SJZZ RFILA0001SJZZ RFILR0001SJZZ J J J AD FM IF AD AM IF AD FM Band Pass Filter RCILI0001SJZZ RCILI0002SJZZ RCILI0003SJZZ RTRNP0001SJZZ J J J J AD AD AD AP FM IF FM Detection AM IF Power RCILR0001SJZZ RCILB0001SJZZ RCILA0001SJZZ RCILB0002SJZZ RCILB0003SJZZ VP-DHR82K0000 VP-DHR68K0000 J J J J J J J AB AE AD AC AD AE AC FM RF OSC,FM AM Bar Antenna OSC,AM OSC,Bias 0.82 µH,Choke 0.68 µH J J AC 6.8 kohms (B),Semi-VR [VCO] AE 20 kohms (B),Semi-VR [Volume] DIODES ! D1 D101~103 D201 D308,309 D651~654 D740,741 D802 ZD801 FILTERS CF1 CF2 F1 TRANSFORMERS ! T1 T2 T3 T601 COILS L1 L2 L3 L4 L301 L801 L802 VARIABLE RESISTORS VR1 VR201 RVR-M0001SJZZ RVR-B0001SJZZ VARIABLE CAPACITORS VC1~4 RVC-R0001SJZZ J AK Variable Capacitor with Trimmer (TC1~4) J J AD Ceramic,4 MHz AE Ceramic,16.93 MHz J J J J J J J J AA AA AA AA AA AB AB AA VIBRATORS X701 XL801 RCRM-0001SJZZ RCRM-0002SJZZ CAPACITORS C2 C4 C5 C6 C8 C9 C10 C11 VCKYPA1HB102K VCCCPA1HH220J VCCCPA1HH330J VCCRPA1HH150J VCCCPA1HH4R0C VCKYPA1HB472K VCKYPA1HF223Z VCKYPA1HB221K 0.001 µF,50V 22 pF (CH),50V 33 pF (CH),50V 15 pF (RH),50V 4 pF (CH),50V 0.0047 µF,50V 0.022 µF,50V 220 pF,50V NO. C14,15 C16 C17 C20,21 C22 C23 C24 C25 C26 C27 C28 C29 C31,32 C33~35 C36 C37 C38,39 C105,106 C107,108 C109,110 C111,112 C113,114 C115,116 C117,118 C119 C120 C121,122 C123 C201,202 C203,204 C205,206 C207~210 C211 C212 C213~216 C217,218 C219,220 C221,222 C223,224 C225 C226 C227 C229,230 C231,232 C233,234 C301,302 C351 C352 C353 C354 C651~654 C701,702 C704 C705 C740 C741 C779 C801 C802 C803 C804 C805,806 C807 C808 C809 C810 C811 C812 C813 C814 C815 C816 C817 C818 C819 C820 C821 C822 C830 C831 C832 C833 –1– PRICE RANK PARTS CODE VCKYPA1HF223Z VCKYPA1HB472K VCKYPA1HF223Z VCKYPA1HF223Z VCKYPA1HB392K VCKYPA1HF103Z VCKYPA1HB471K RC-GZA335AF1H RC-GZA226AF1C RC-GZA335AF1H VCQSMV1HS152J RC-GZA106AF1C VCTYPA1CU223M RC-GZA105AF1H VCKYPA1HF223Z RC-GZA227AF1A VCKYPA1HF223Z VCKYPA1HB182K VCKYPA1HB821K VCKYPA1HB271K VCKYPA1HB331K RC-GZA476AF1C VCQYKA1HM183K RC-GZA106AF1C RC-GZA225AF1H RC-GZA476AF1C VCKYPA1HF103Z RC-GZA107AF1A VCQYKA1HM562K RC-GZA106AF1C VCKYPA1HB182K RC-GZA475AF1H RC-GZA476AF1C RC-GZA106AF1C VCQYKA1HM393K VCKYPA1HB272K VCQYKA1HM473K VCKYPA1HB152K RC-GZA107AF1A RC-GZA227AF1E VCKYPA1HF223Z RC-GZW338AF1E RC-GZA107AF1A VCQYKA1HM104K RC-GZV108AF1A VCKYPA1HF223Z VCQYKA1HM222K RC-GZA227AF1A VCQYKA1HM223K VCQYKA1HM562K VCKYPA1HF223Z VCKYPA1HF223Z RC-GZA107AF1A VCKYPA1HF223Z VCKYPA1HF103Z RC-GZA335AF1H RC-GZA106AF1C VCKYPA1HF103Z RC-GZA476AF1C RC-GZA104AF1H VCKYPA1HB102K VCTYPA1CU333M RC-GZA104AF1H VCTYPA1CU683M VCTYPA1CU473M VCKYPA1HB181K VCTYPA1CU104M VCKYPA1HB331K VCTYPA1CU104M VCTYPA1CU103M VCKYPA1HB472K VCKYPA1HB102K RC-GZA474AF1H RC-GZA105AF1H RC-GZA476AF1C VCKYPA1HB332K RC-GZA105AF1H VCKYPA1HB221K VCCCPA1HH2R0C VCKYPA1HB272K VCCCPA1HH270J VCKYPA1HB102K J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J AB AB AB AB AA AB AA AB AB AB AB AB AB AB AB AB AB AB AA AA AA AB AB AB AB AB AB AB AA AB AB AB AB AB AB AA AB AA AB AB AB AG AB AB AD AB AA AB AB AA AB AB AB AB AB AB AB AB AB AB AA AB AB AB AB AA AB AA AB AE AB AA AA AB AB AA AB AA AA AA AA AA DESCRIPTION 0.022 µF,50V 0.0047 µF,50V 0.022 µF,50V 0.022 µF,50V 0.0039 µF,50V 0.01 µF,16V 470 pF,50V 3.3 µF,50V,Electrolytic 22 µF,16V,Electrolytic 3.3 µF,50V,Electrolytic 0.0015 µF,50V,Styrol 10 µF,16V,Electrolytic 0.022 µF,16V 1 µF,50V,Electrolytic 0.022 µF,50V 220 µF,10V,Electrolytic 0.022 µF,50V 0.0018µF,50V 820 pF,50V 270 pF,50V 330 pF,50V 47 µF,16V,Electrolytic 0.018 µF,50V,Mylar 10 µF,16V,Electrolytic 2.2 µF,50V,Electrolytic 47 µF,16V,Electrolytic 0.01 µF,16V 100 µF,10V,Electrolytic 0.0056 µF,50V,Mylar 10 µF,16V,Electrolytic 0.0018 µF,50V 4.7 µF,50V,Electrolytic 47 µF,16V,Electrolytic 10 µF,16V,Electrolytic 0.039 µF,50V,Mylar 0.0027 µF,50V 0.047 µF,50V,Mylar 0.0015 µF,50V 100 µF,10V,Electrolytic 220 µF,25V,Electrolytic 0.022 µF,50V 3300 µF,25V,Electrolytic 100 µF,10V,Electrolytic 0.1 µF,50V,Mylar 1000 µF,10V,Electrolytic 0.022 µF,50V 0.0022 µF,50V,Mylar 220 µF,10V,Electrolytic 0.022 µF,50V,Mylar 0.0056 µF,50V,Mylar 0.022 µF,50V 0.022 µF,50V 100 µF,10V,Electrolytic 0.022 µF,50V 0.01 µF,16V 3.3 µF,50V,Electrolytic 10 µF,16V,Electrolytic 0.01 µF,16V 47 µF,16V,Electrolytic 0.1 µF,50V,Electrolytic 0.001 µF,50V 0.033 µF,16V 0.1 µF,50V,Electrolytic 0.068 µF,16V 0.047 µF,16V 180 pF,50V 0.1 µF,16V 330 pF,50V 0.1 µF,16V 0.01 µF,16V 0.0047 µF,50V 0.001 µF,50V 0.47 µF,50V,Electrolytic 1 µF,50V,Electrolytic 47 µF,16V,Electrolytic 0.0033 µF,50V 1 µF,50V,Electrolytic 220 pF,50V 2 pF (CH),50V 0.0027 µF,50V 27 pF (CH),50V 0.001 µF,50V QT-CD121 NO. C834 C835 C837 C838 C839 C840 C841,842 C843 C844 C845 C846 C847 C848 C849 C850 C851 C867,868 C869,870 C873 C887 C889 C890 PRICE RANK PART CODE VCTYPA1CU333M RC-GZA104AF1H RC-GZA106AF1C VCTYPA1CU103M RC-GZA105AF1H RC-GZA334AF1H VCTYPA1CU473M RC-GZA107AF1A 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 J J J J J J J J AB AB AB AE AB AA AB AB AB AB AB AE AB AB AB AB AB AA AB AB AB AB 0.033 µF,16V 0.1 µF,50V,Electrolytic 10 µF,16V,Electrolytic 0.01 µF,16V 1 µF,50V,Electrolytic 0.33 µF,50V,Electrolytic 0.047 µF,16V 100 µF,10V,Electrolytic 330 µF,10V,Electrolytic 4.7 µF,50V,Electrolytic 330 µF,10V,Electrolytic 0.01 µF,16V 1 µF,50V,Electrolytic 0.022 µF,50V 0.1 µF,16V 0.022 µF,50V 10 µF,16V,Electrolytic 0.0022 µF,50V 0.01 µF,16V 0.022 µF,50V 10 µF,16V,Electrolytic 100 µF,10V,Electrolytic J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA 10 ohm,1/4W 33 ohms,1/6W 47 ohms,1/4W 330 kohms,1/6W 820 kohms,1/6W 390 ohms,1/4W 3.9 kohms,1/6W 22 kohms,1/6W 1.2 kohms,1/6W 3.9 kohms,1/6W 2.2 kohms,1/6W 68 ohms,1/4W 120 ohms,1/6W 33 kohms,1/6W 15 kohms,1/6W 1.8 kohms,1/4W 330 ohms,1/6W 12 kohms,1/6W 15 kohms,1/6W 1 kohm,1/6W 120 ohms,1/6W 8.2 kohms,1/6W 3.9 kohms,1/6W 3.3 kohms,1/6W 1.5 kohms,1/6W 3.3 kohms,1/6W 680 kohms,1/6W 100 kohm,1/6W 10 kohm,1/6W 4.7 kohms,1/6W 12 kohms,1/6W 22 kohms,1/6W 10 kohm,1/6W 22 kohms,1/6W 2.2 kohms,1/6W 22 kohms,1/6W 3.3 kohms,1/6W 1 kohm,1/6W 120 ohms,1/4W 2.7 ohms,1/4W 330 ohms,1/4W 4.7 kohms,1/6W 330 ohms,1/4W 150 ohms,1/4W 47 kohms,1/4W 10 ohm,1/4W 15 kohms,1/6W 1.2 kohms,1/6W 1 kohm,1/6W 10 kohm,1/6W 2.7 kohms,1/6W 1 kohm,1/6W 1 kohm,1/6W 10 kohm,1/6W 15 kohms,1/6W 10 kohm,1/6W 15 kohms,1/6W NO. R724 R725 R726 R727 R728,729 R730 R731~734 R736 R740 R741 R742 R743 R744,745 R771 R772 R773 R774 R776 R779 R801 R802 R803 R804 R805 R806 R807 R808 R809 R810 R811 R812 R813 R814 R815 R816 R817 R819 R820 R821 R822 R823 R824 R825 R826,827 R828,829 R830,831 R832 R833 R834 R835 R836,837 R838 R839,840 R842 R849 R856 R857 R858 R860 R871 R873,874 R875,876 R877 R878 R880 RESISTORS R1 R2 R3 R5 R6 R7 R8 R9 R11 R13,14 R15,16 R17 R25 R27 R29 R38 R101,102 R103,104 R105,106 R107,108 R109,110 R113,114 R115~118 R119,120 R121,122 R123,124 R125 R201,202 R203,204 R205,206 R207,208 R209,210 R211,212 R213,214 R215,216 R217,218 R219,220 R221,222 R227,228 R230 R231 R233,234 R351 R352 R353 R354 R455,456 R457,458 R708,709 R710 R711 R712 R713 R714 R715 R716 R718~723 VRD-ST2EE100J VRD-ST2CD330J VRD-ST2EE470J VRD-ST2CD334J VRD-ST2CD824J VRD-ST2EE391J VRD-ST2CD392J VRD-ST2CD223J VRD-ST2CD122J VRD-ST2CD392J VRD-ST2CD222J VRD-ST2EE680J VRD-ST2CD121J VRD-ST2CD333J VRD-ST2CD153J VRD-ST2EE182J VRD-ST2CD331J VRD-ST2CD123J VRD-ST2CD153J VRD-ST2CD102J VRD-ST2CD121J VRD-ST2CD822J VRD-ST2CD392J VRD-ST2CD332J VRD-ST2CD152J VRD-ST2CD332J VRD-ST2CD684J VRD-ST2CD104J VRD-ST2CD103J VRD-ST2CD472J VRD-ST2CD123J VRD-ST2CD223J VRD-ST2CD103J VRD-ST2CD223J VRD-ST2CD222J VRD-ST2CD223J VRD-ST2CD332J VRD-ST2CD102J VRD-ST2EE121J VRD-ST2EE2R7J VRD-ST2EE331J VRD-ST2CD472J VRD-ST2EE331J VRD-ST2EE151J VRD-ST2EE473J VRD-ST2EE100J VRD-ST2CD153J VRD-ST2CD122J VRD-ST2CD102J VRD-ST2CD103J VRD-ST2CD272J VRD-ST2CD102J VRD-ST2CD102J VRD-ST2CD103J VRD-ST2CD153J VRD-ST2CD103J VRD-ST2CD153J PRICE RANK PARTS CODE VRD-ST2EE153J VRD-ST2CD153J VRD-ST2CD102J VRD-ST2EE102J VRD-ST2CD102J VRD-ST2EE102J VRD-ST2CD102J VRD-ST2CD102J VRD-ST2CD472J VRD-ST2CD332J VRD-ST2CD102J VRD-ST2CD104J VRD-ST2CD103J VRD-ST2EE392J VRD-ST2EE272J VRD-ST2EE182J VRD-ST2EE152J VRD-ST2EE103J VRD-ST2EE470J VRD-ST2CD102J VRD-ST2CD104J VRD-ST2CD153J VRD-ST2CD222J VRD-ST2CD682J VRD-ST2CD101J VRD-ST2CD102J VRD-ST2CD123J VRD-ST2CD273J VRD-ST2CD823J VRD-ST2CD332J VRD-ST2CD153J VRD-ST2CD333J VRD-ST2CD103J VRD-ST2CD473J VRD-ST2CD152J VRD-ST2CD823J VRD-ST2CD393J VRD-ST2CD103J VRD-ST2CD563J VRD-ST2CD682J VRD-ST2CD122J VRD-ST2CD103J VRD-ST2CD122J VRD-ST2CD224J VRD-ST2EE102J VRD-ST2CD102J VRD-ST2CD563J VRD-ST2CD562J VRD-ST2CD102J VRD-ST2CD471J VRD-ST2CD473J VRD-ST2CD333J VRD-ST2CD223J VRD-ST2EE220J VRD-ST2CD104J VRD-ST2CD122J VRD-ST2CD273J VRD-ST2CD681J VRD-ST2CD102J VRD-ST2CD472J VRD-ST2CD101J VRD-ST2CD103J VRD-ST2EE221J VRD-ST2CD101J VRD-ST2CD101J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J DESCRIPTION AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA 15 kohms,1/4W 15 kohms,1/6W 1 kohm,1/6W 1 kohm,1/4W 1 kohm,1/6W 1 kohm,1/4W 1 kohm,1/6W 1 kohm,1/6W 4.7 kohms,1/6W 3.3 kohms,1/6W 1 kohm,1/6W 100 kohm,1/6W 10 kohm,1/6W 3.9 kohms,1/4W 2.7 kohms,1/4W 1.8 kohms,1/4W 1.5 kohms,1/4W 10 kohm,1/4W 47 ohms,1/4W 1 kohm,1/6W 100 kohm,1/6W 15 kohms,1/6W 2.2 kohms,1/6W 6.8 kohms,1/6W 100 ohm,1/6W 1 kohm,1/6W 12 kohms,1/6W 27 kohms,1/6W 82 kohms,1/6W 3.3 kohms,1/6W 15 kohms,1/6W 33 kohms,1/6W 10 kohm,1/6W 47 kohms,1/6W 1.5 kohms,1/6W 82 kohms,1/6W 39 kohms,1/6W 10 kohm,1/6W 56 kohms,1/6W 6.8 kohms,1/6W 1.2 kohms,1/6W 10 kohm,1/6W 1.2 kohms,1/6W 220 kohms,1/6W 1 kohm,1/4W 1 kohm,1/6W 56 kohms,1/6W 5.6 kohms,1/6W 1 kohm,1/6W 470 ohms,1/6W 47 kohms,1/6W 33 kohms,1/6W 22 kohms,1/6W 22 ohms,1/4W 100 kohm,1/6W 1.2 kohms,1/6W 27 kohms,1/6W 680 ohms,1/6W 1 kohm,1/6W 4.7 kohms,1/6W 100 ohm,1/6W 10 kohm,1/6W 220 ohms,1/4W 100 ohm,1/6W 100 ohm,1/6W AF AD AE AC AC AC AC Connector Ass’y,8/8Pin Connector Ass’y,5/5Pin Connector Ass’y,6/6Pin Socket,4Pin Socket,3Pin Socket,2Pin Plug,6Pin Connector Ass’y,4Pin Connector Ass’y,3Pin Connector Ass’y,2Pin Core Core Flat Wire,5Pin Flat Wire,4Pin OTHER CIRCUITRY PARTS BI801/CNS801 BI802/CNS802 BI803/CNS803 CNP101 CNP201 CNP602 CNP803 CNS101 CNS201 CNS602 COR1 COR801 FW202 FW701 –2– QCNWN0003SJZZ QCNWN0004SJZZ QCNWN0005SJZZ QCNCW001DSJZZ QCNCW001CSJZZ QCNCW002BSJZZ QCNCM932FAFZZ QCNWN0010SJZZ QCNWN0001SJZZ QCNWN0007SJZZ RCORF0001SJZZ RCORF0001SJZZ QCNWN0012SJZZ QCNWN0011SJZZ J J J J J J J J J J J J J J AD AC AC AC AF AE QT-CD121 NO. ! PRICE RANK PART CODE J201 LCD701 M601 M701 M702 RX771 SO651 SP501,502 SP503,504 SW102 QJAKM0007AWZZ RV-LX0001SJZZ 9GD192112343W RMOTV0408AFM3 RMOTV0409AFM1 VHLSPS4461/-1 QSOCA0001SJZZ VSP0010PBT98S RALMB0001SJZZ QSW-S0001SJZZ J J J J J J J J J J AF AH AX AN AN AQ AE AL AH AD SW201 QSW-S0002SJZZ J AD SW202 SW203 SW601 SW702 SW761 QSW-P0001SJZZ QSW-P0001SJZZ 9GD6401011499 QSW-F9001AWZZ QSW-F0001SJZZ J J J J J AD AD AE AE AD SW771 SW772 SW773 SW774 QSW-K0001SJZZ QSW-K0001SJZZ QSW-K0001SJZZ QSW-K0001SJZZ J J J J AC AC AC AC DESCRIPTION Jack,Headphones LCD Motor with Pulley [Tape] Motor with Chassis [Spindle] Motor with Gear [Sled] Remote Sensor,SPS4461 AC Socket Speaker,Woofer Tweeter Switch,Slide Type [Record/Playback] Switch,Slide Type [Function/Power] Switch,Push Type [SURROUND] Switch,Push Type [X-BASS] Switch,Leaf Type [Tape Main] Switch,Push Type [Pickup In] Switch,Leaf/Skeleton Type [CD Lid Open/Close] Switch,Key Type [Play] Switch,Key Type [Stop] Switch,Key Type [Track Up/Cue] Switch,Key Type [Track Down/Review] ! NGERH0586AFZZ NGERH0587AFZZ MLEVP1054AFZZ NSFTM0291AFFW PCUSG0613AFZZ RCTRH8179AFZZ XBSSD26P06000 XHBSD20P05000 XBBSD20P03000 LX-WZ1070AFZZ RMOTV0408AFM3 RMOTV0409AFM1 QSW-F9001AWZZ 237 238 239 241 241- 1 241- 2 241- 3 241- 4 241- 5 241- 6(M601) 241- 7(SW601) 242 243 601 602 603 604 605 606 607 608 J J J J J J J J J J J J J AC AC AC AD AC BG AA AA AA AA AN AN AE Gear,Middle Gear,Drive Rail,Guide Shaft,Guide Cushion Pickup Unit Ass’y Screw,ø2.6×6mm Screw,ø2×5mm Screw,ø2×3mm Washer,ø4.5×ø1.5×0.25mm Motor with Chassis [Spindle] Motor with Gear [Sled] Switch,Push Type [Pickup In] Front Cabinet Ass’y Top Cabinet Rear Cabinet Gear,Damper Bracket,Dial Panel,Control Panel,Dial Cover,Volume Knob,Volume Nylon Band Spring,Battery,+/Handle Rod Antenna Spring,Rod Antenna Battery Compartment Lid Knob,Tuning Knob,X-BASS Knob,CD Knob,Function Spring,CD Lid Cassette Lid Spring,Cassette Lid Button,Pause Button,Stop Button,FF Button,REW Button,Play Button,Rec Bracket,Button Leg,Cushion CD Lid Stabilizer Ass’y Stabilizer (Not Replacement Item) Magnet Lever,Record Drum Holder,LCD Spring,Battery,- GCABA1002SJM1 GCABC1001SJSA GCABB1002SJSA CGERH0001SJ01 LHLDZ1001SJZZ HPNLC1002SJSA HPNLD1001SJSA HDECQ0001SJSA JKNBK0007SJSA LHLDW1001SJZZ MSPRC0002SJFD JHNDP1001SJSA QANTR0001SJZZ MSPRZ0001SJFD GFTAB1001SJSA JKNBZ0002SJSA JKNBK0005SJSA JKNBZ0004SJSA JKNBK0003SJSA MSPRD0002SJFD GFTAC1001SJSA MSPRD0001SJFD JBTN-0001SJSA JBTN-0002SJSA JBTN-0003SJSA JBTN-0004SJSA JBTN-0005SJSA JBTN-0006SJSA LANGK0001SJFW PGUMS0001SJZZ GFTAT1001SJSA CHLDM1001SJ01 ———— J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J BC AL AU AF AD AF AD AD AF AD AC AE AG AC AD AD AF AF AC AC AE AC AC AC AC AC AC AC AC AB AE AG — 232- 2 233 234 235 236 PMAGF0002AWZZ MSPRP0001SJFW NDRM-0001SJZZ LHLDZ1002SJZZ MSPRC0001SJFN J J J J J AE AC AD AC AC PCUSS0001SJZZ PRDAR0001SJZZ LHLDA1001SJZZ CMECB0001SJ01 9GD192104309 9GD192107039 9GD192109389 9GD62070114 9GD62091010 9GD192112343W 9GD6401011499 TSPC-0001SJZZ JKNBK0006SJSA XUBSD30P12000 XUBSD30P20000 XUBSD30P10000 XUBSD25P10000 XWHSD28-08120 XUPSD25P08000 XUBSD30P08000 XBBSD25P06000 QACCD0006AW00 RRMCG0052AWSA TINSE0003SJZZ TLABR0965SJZZ TLABZ0003SJZZ DESCRIPTION J J J J J J J J J J J J J J J J J J J J J AB AD AC AY AR AE AE AL AM AX AE AL AE AA AA AA AB AB AB AA AB Cushion Heat Sink Holder Tape Mechanism Ass’y Pinch Roller Arm Ass’y Belt,RF Belt,Main Head,Playback/Record Head,Erase Motor with Pulley [Tape] Switch,Leaf Type [Tape Main] Specification Label Knob,Surround Screw,ø3×12mm Screw,ø3×20mm Screw,ø3×10mm Screw,ø2.5×10mm Screw,ø2.8×ø12×0.8mm Screw,ø2.5×8mm Screw,ø3×8mm Screw,ø2.5×6mm J J J J J AP BB AE AD AE AC Power Supply Cord Remote Control Operation Manual Label,Bar Code Feature Label P.W.B. ASSEMBLY (Not Replacement Item) PWB-A1~5 DCEK-0001SJ03 J PWB-B QPWBF3895AFZZ J CABINET PARTS 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 232- 1 PRICE RANK PARTS CODE ACCESSORIES ! CD MECHANISM PARTS 301 302 303 304 305 306 701 702 703 704 M701 M702 SW702 NO. –3– — Main/Switch/Terminal/Headphones/Spacer (Combined Ass’y) AC CD Motor (PWB Only) QT-CD121 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 QT-CD121 203 213 601x3 A 215 212 242 PWB-A3 B 211 236 602x6 214 601x2 221 PWB-A5 231 601 603 603 603x2 C 230x2 603 202 PWB-A4 603 601x2 TAPE MECHANISM 241 (241-1, 241-2 241-3, 241-4, 241-5, 241-6, 241-7) D 232-2 222 228 227 226 225 229 220 204 CD MECHANISM 602 606 223 216 SW761 224 603x4 608 607x2 603 603 234 E 205 Silicon Grease 605x3 603x4 607 604x3 SP503 SP501 201 F 232-1 232 607 PWB-A1 218 238 219 243 603x2 603 217 235 G PWB-A2 207 603x5 LCD701 603x4 SP502 208 210 209 SP504 206 H NOTE: The parts of cassette mechanism which are supplied are only the unit and consumable parts. 1 2 3 4 Figure 5 CABINET EXPLODED VIEW ––28 5 –– 5 6 QT-CD121 PACKING OF THE SET • Setting position of switches and knobs Tape Mechanism Control STOP STATE TUNING LOW POWER/FUNCTION OFF/TAPE X-BASS OFF SURROUND OFF VOLUME LOW Remote Control AC Power Supply Cord Polyethylene Bag, Unit SSAKH0001SJZZ Packing Case SPAKC0003SJZZ Feature Label FR ON T Operation Manual FR ON T Packing Add., Left/Right SPAKA0001SJZZ Bar Code Label : Not Replacement Item ––29 6 –– QT-CD121 —MEMO— ––30 7 –– QT-CD121 —MEMO— ––31 8 –– QT-CD121 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. SHARP CORPORATION Communication Systems Group Quality & Reliability Control Center Higashihiroshima, Hiroshima 739-0192, Japan Printed in Japan A9805-2002NS•HA•M SC • LAG – 32 –