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Casio ZD-1 Service Manual

Md cd system.
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ZD-1
SEP.1998
Model-B: U.S.A.
Model-C: Europe
MD CD SYSTEM
INDEX

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Troubleshooting

   Related Manuals for Casio ZD-1

   Summary of Contents for Casio ZD-1

  • Page 1

    (without price) ZD-1 SEP.1998 Model-B: U.S.A. Model-C: Europe MD CD SYSTEM INDEX...

  • Page 2: Table Of Contents

    CONTENTS Specifications ........................... 1 Disassembly Instructions ......................... 2 Reassembly of Tuning Pointer ......................4 CD Pickup Replacement ........................5 Block Diagrams ..........................6 Tuner ............................6 AMP ............................7 CD .............................. 8 MD Unit ............................9 Display Unit ..........................10 PS Unit .............................

  • Page 3: Specifications

    SPECIFICATIONS MD SECTION System: MiniDisc digital audio system Laser: Semiconductor laser Error correction: Advanced cross interleave read Solomon code (ACIRC) Channel: 2 channels Frequency response: 20 to 20,000Hz +/-3dB Wow and flutter: Less than measurement limit Recording system: Magnetic field modulation overwrite method Coding: Adaptive Transform Acoustic Coding (ATRAC) CD SECTION System: Compact disc digital audio system...

  • Page 4: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 1. Remove the battery cover and batteries. 2. Remove ten screws A holding case B unit. Case B Unit Battery Cover Figure 1 3. Open the CD door, remove four screws B holding the case kit. CD Door Top Panel Kit CaseKit Figure 2...

  • Page 5

    4. Pull out the function knob and tuning knob. 5. Remove four screws C holding the tuner unit. 6. Remove four screws D holding the AMP unit. 7. Remove nine screws E holding the CD unit. Function Knob 8. Remove three screws F holding the CD mechanism set. Tuning Knob Top Case Assembly Tuner Unit...

  • Page 6: Reassembly Of Tuning Pointer

    REASSEMBLY OF TUNING POINTER 1. Turn the varicon unclockwise stop position. 2. Set the pointer ; mark position. (refer figure 6) 3. Set the varicon gear of figure 6 position. 4. Insert the tuner gear, fixed the screws L ( tuner collar and tuner plate) and K. (refer figure 5) Varicon Gear Pointer Tuner Gear...

  • Page 7: Cd Pickup Replacement

    CD PICKUP REPLACEMENT Precautions To prevent damage caused by static electricity, the following procedures for grounding is required when opening or repairing the unit. 1. Grounding for the human body Ω) whose other end is grounded. Be sure to put on a wrist-strap for grounding (with impedance lower than 10 The strap works to drain away the static electricity build-up on the human body.

  • Page 8: Block Diagrams

    BLOCK DIAGRAMS Tuner To Amplifier Block Loop Antenna GND V R ch L ch BAND SW FM-MONO Stereo MPX In RF Out LPF1 LPF2 RF In Decode AM/FM Level GND1 FM MIX AM MIX AM IF FM IF GND2 QUAD Antenna RF In FM Signal...

  • Page 10

    PS Unit AC9V Q711 IC705 Remote Power Power Control Driver Q707,903 SW701 Function Q709,710 Power Low Battey Driver Detect IC705 IC709 Circuit System Reset Q708 MD Unit Level Circuit Power Shifter Control Driver Display Unit IC704 X703 Micro 16MHz Processor Q704,705 X702 CD +9V...

  • Page 11: Md Unit

    MD Unit TH501 TEMP TO CD PCB DETECTOR CN504 IC505 MD_MUTE SYS_+3.3V BA10358 RXD. TXD. RTS. VBAT SYSTEM-RST SYSTEM_RST P_DOWN POWER-DOWN CTS. AMUTE TEMPDET DA-RST GND_UCOM D502 D501 1SS133 EMPHASIS INVERT Q501 POWER CN501 SUPPLY 16P(FFC) IC501 TO BD BOAD S-81340HG (CN103) TO MD BOAD...

  • Page 12: Display Unit

    Display Unit (DB7) (DB6) (DB5) (DB4) (DB3) (DB2) LCD Module (DB1) CN951 LC950 (DB0) (RW) (RS) (V0) CN952 (5V) (GND) (GND) (5V) MD Out Control Switch Switch (KEYIN3) CN953 Circuit SW962 (KEYIN2) SW950~SW961 (KEYIN1) (REMOTE) (REMOPOWER) (JOG1) Remocon Photoreceiver (JOG0) Rotary Encoder IC951 EN950...

  • Page 13: Cd Md Test

    There should be no any noise on the playback sound after record for the aging check. 4) Test MD The following Test MDs are available from A*BEX or parts center of Casio. However Test MDs of Sony cannot be available from Casio.

  • Page 14: Cd Adjustments

    CD ADJUSTMENTS Pre-Adjustment Procedures * Remove the bottom chassis assembly. (Refer pages 3, 4) * Use the plastic screwdriver. Equipment Required * Oscilloscope * Screwdriver (Plastic type) Focus Sarvo Offset Adjustment (Figures 7 and 11) Step Connect Setting Adjust Result Play the regular disc.

  • Page 15

    Focus Servo Gain Adjustment (Figures 9 and 11) Step Connect Setting Adjust Result Play the regular disc. VR704 Figure 9 250 mV p-p Oscilloscope CD PCB TP750 TP710 Figure 9 Tracking Servo Adjustment (Figures 10 and 11) Step Connect Setting Adjust Result Play the regular disc.

  • Page 16

    CD Adjustment Points Top View VR701 VR702 VR704 VR703 TP750 Bottom View TP710 TP706 TP751 TP709 Figure 11...

  • Page 17: Cd Troubleshooting

    CD TROUBLESHOOTING Open CD door and set function switch for CD position. Is “CD OPEN” display on LCD ? Load a disc close CD door. Is “CD CLOSE” display on LCD ? Are total track number displayed? Press PLAY/PAUSE key. Is the audio signal present at the output terminals ?

  • Page 18

    1. “CD OPEN” is not displayed. * Check IC705. Is +5 V lines pin 72 * Check circuit around IC705. of IC704 normal ? Is the waveform * Check Q713. at pin 30 of IC704 like that * Check circuit around IC706. shown in Fig.

  • Page 19

    2. “CD CLOSE” is not displayed. Is the waveform * Check IC704. at pin 43 of IC704 like that * Check circuit around IC704. shown in Fig. 13 ? Is the waveform * Check Q713. at base of Q713 like that shown in Fig.

  • Page 20

    3. Total track number is not displayed. Check how much times it takes until “NO DISC” is displayed after CD door has closed. About About About 10 sec 6 sec 15 sec...

  • Page 21

    Note: Open the CD door and check the radiation power with an optical power meter or by watching the radiaation through the lens of the pickup unit at a minimum distance of 30cm from the pickup. Does the LASER emit ? Dose the lens move up and down ? Load a disc and close CD door.

  • Page 22

    3-A1 Does <3 V * Check IC701. appear at pin 33 (LD) of IC701 ? * Check circuit around Q701. * Check CN701. * Check Q701. * Check pickup. 3-A2 Dose +9 V * Check circuit around IC703. appear at pins 19 of IC703 ? 1.10V 750mV...

  • Page 23

    Does disc motor rotate ? Does CD mechanism * Check CD mechanism operateing normary ? * Check CD turn table unit. Is waveform at * Check CN702 and CN703. pin 13 of IC703 llike that * Check disc motor. shown in Fig. 21 ? * Check soldering IC701.

  • Page 24

    Is waveform at * Check CN701. pin 42 (TEO) of IC701 like that * Check IC701. shown in Fig. 23 ? * Check circuit around TE-Amp lines. Is waveform at * VR703 adjustment is no good. pin 44 (TE1) of IC701 like that Readjust VR703.

  • Page 25

    4. No audio signal to output terminals. Does audio signal * Check Q901 and Q902. appear at pins 1 and 7 * Check circuit around Q901 and Q902. of IC707 ? Does 4.23 MHz appear at pin 11 (CLOK) of IC702 ? Does 88.2 kHz appear at pin 42 (LRCK) of IC702 ?

  • Page 26

    5. Selected track number cannot be searched. Press the” “ or “ “ key. * VR702 adjustment is no good. Is waveform at Readjust VR702. pin 42 (TEO) of IC701 like that (Refer to CD Adjustments) shown in Fig. 27 ? Figure 27 Is waveform at * Check CD mechanism and disc...

  • Page 27: Operation Troubleshooting

    OPERATION TROUBLESHOOTING Symptom Cause Countermeasure No operation after power cord is The unit under DEMONSTRATION mode. Press the power button or hold the BBS plugged into an AC household outlet. button pressed for more than 3 seconds. Only LCD display is scrolling. The unit functions are not properly Due to dew condensation of inside, the unit cannot Leave the unit for about one hour to let it...

  • Page 28: Pcb Views

    PCB VIEWS Tuner PCB Top...

  • Page 29: Amp Pcb Top

    AMP PCB Top...

  • Page 30: Display Pcb Top/bottom

    Display PCB Top Display PCB Bottom...

  • Page 31: Md Pcb Top/bottom

    MD PCB Top...

  • Page 32

    MD PCB Bottom...

  • Page 33: Cd Pcb Top/bottom

    CD PCB Top...

  • Page 34

    CD PCB Bottom...

  • Page 35: Wiring Diagram

    WIRING DIAGRAM CD MECHANISM Shield Plate LCD Panel Speaker R ch Speaker L ch Pickup Disc Motor Sled Motor Pickup Preset Switch CD PCB Model-C Only AMP PCB CN954 CN952 CN405 CN404 CN701 1 2 1 2 CN704 CN703 CN702 DISPLAY PCB Heat Sink MD SW PCB...

  • Page 36: Ic Lead Identification And Internal Diagrams

    IC LEAD IDENTIFICATION AND INTERNAL DIAGRAMS IC3: TA8167N FM OSC AM OSC MPX In LPF1 LPF2 L ch Out R ch Out RF In RF Out Decode AM/FM Level FM IF In GND2 TUN LED ST LED QUAD FM RF In GND1 FM MIX AM MIX...

  • Page 37

    IC402: TA8227P B.S. 2 B.S. 1 Out 1 Power GND OUt 2 30 kΩ Bias Circuit 30 kΩ Thermal Vcc1 Shut Down Protection Ch 1 Ch 2 Circuit Vcc2 Pre GND (F In) 45Ω 45Ω In 1 NF 1 In 2 NF 2 Ripple IC403: BA15218N...

  • Page 38

    IC404: PQ15RW11 1 2 3 4 Vadj IC501: S-81340HG-KJ-T1 *Parasitic Diode Vref IC502: TC7WU04FU-TE12L Out 1 In 2 Out 3 In 1 Out 2 In 3...

  • Page 39

    IC503: PCM3003E-T1 Analog Decimation Delta-sigma LRCIN Front-end & VINL Modulator Circuit Low Cut Filter BCKIN Serial Interface VREF1 Reference VCOM DOUT VREF2 Decimation Analog Delta-sigma & Front-end VINR Modulator Low Cut Filter Circuit Analog Interpolation Multi-level Filter X8 Low-pass Delta-sigma VOUTL Filter Modulator...

  • Page 40

    IC505: BA10358 Out 2 -In2 +In 2 Out 1 -In 1 +In 1...

  • Page 41

    IC701: CXA1782BR PHD2 PHD1 RF M RF O RF I CC12 LEVEL Amp.1 SENS MIRR Amp.2 DFC1 BIAS XRST IIL Date Register Input Shift Register FIV Amp. Adress Decoder EF Amp. DATA Output Decoder EIV Amp. TOG1~3 TG1~2 PS1~4 BAL1~3 FS1~4 TM1~7 Comparator Tracking...

  • Page 42

    IC702: CXD2508AR EMPHI NLPWM LRCKI LPWM Digital Filter PCMDI 1 bit DAC RPWM BCKI MUTE NRPWM DOUT PCMD LRCK WDCK XROF Digital C2PO LOCK Interface Digital RFCK MNTO Error 16K RAM MNT1 Corrector MNT3 SQCK SQSO WFCK EXCK EMPH SBSO SCOR Demodulator XUGF...

  • Page 43

    IC703: BA5941FP VIN4’ VIN4 VIN3’ VIN3 OP Out OP In(-) OP In(+) VO3(-) VO3(+) VO4(-) VO4(+) 13.3K Level shift 13.3K Level shift Level shift Level shift 13.3K 13.3K MUTE BIAS In VIN1’ VIN1 VIN2’ VIN2 MUTE VO2(-) VO2(+) VO1(-) VO1(+)

  • Page 44

    IC704: CXP84648-122Q P15/SCK2 PA2/AN2 P16/S12 PA1/AN1 P17/SO2 PA0/AN0 XTAL EXTAL PF0/SCL0 PF1/SCL1 PF2/SDA0 PA0~PA7 Clock AN0~AN7 A/D Converter Generator/ SPC700 System CPU Core UART Receiver Control URAT Transmitter PB0~PB7 UART Baud Rate Generator PWM0 12 Bit PWM Generator 0 PC0~PC7 PWM1 40K Bytes 12 Bit PWM Generator 1...

  • Page 45

    IC705: S-81350HG-KD-T1 *Parasitic Diode Vref IC706: RH5VL29CA-T1 Vref...

  • Page 46

    IC707: BA4510F Out 2 -In2 +In 2 Out 1 -In 1 +In 1 IC708: NJM2930F05 3 2 1 Input Output Common...

  • Page 47

    IC709: TC74VHCT08AFT IC950: REC SPS-444-1 Waveform Limiter Detector Shaper 1 2 3 TRAP ABLC (GND) (GND) IC951: SM8140AM-ET OUT1 OUT2 Enable Circuit High Voltage Switching Circuit Level Shifter Level Shifter Charging Pump Deviding Circuit Deviding Circuit Circuit Oscillator for Oscillator for boosting voltage OCL1 OCL2...

  • Page 48: Schematic Diagrams

    SCHEMATIC DIAGRAMS 1SS133 Tuner 1SS133 AM LOOP ANT. 0.022(X) 15PF(SL) SD115 C10 33PF(SL) 0.022(X) 100K 100PF(B) 0.022(X) TA8167N C2 18-27PF C4 18-27PF SL(22PF) AM ANT FM-RF FM-OSC R1 27 C1 22PF 0.022(X) AM OSC 33/10V C14 10/10V 0.33/50V (CH) 3-12PF FFD455MB (8PF) R7 1K...

  • Page 49: Amp, Ps

    AMP, PS AMP PCB CN401 OUTRCH OUTGND OUTGND OUTLCH R339 180k LMRCH Q308 AGND R340 100k 2SD1302 R341 LMLCH R239 180k 4.7k FROM JACK R240 Q410 R234 100k 2SA1015 220k R414 C460 D460 R241 R351 R251 4.7k 1SS133 FR401 C205 150k 150k Q208...

  • Page 50

    R521 L507 L522 MD OUT(R) 10uH D504 EF502 Q502 EMIFIL DTA114E A GND 1SS133 FB556 D503 L506 1SS133 L521 MD OUT(L) JP581 FBA04HA900 10uH C527 C529 Q504 EF504 FB557 4.7u 4.7u EMIFIL DTC114T L501 TP42 TO MD BOAD C528 C530 EF505 IC503 EMIFIL...

  • Page 51

    9 10 11 CN706 CON11 C934 Q712 R735 C786 C787 R732 TP718 B1000P 2SA1037 C729 CH39P CH15P Q701 C726 C785 C788 SW701A R736 B0.033 L701 2SA1037 CH18P TP709 X702 X703 CH15P C728 CH8P D702 R733 32.769KHZ 16MHZ B4700 TP719 C702 1SS355 TP724 R737...

  • Page 52: Front

    Front CON23 From CD CN952 CON14 CN952 R951 R976 R969 R962 100K 100K 100K R950 C951 R950 0.1uF IC950 R951 REMO-Resive C958 C953 C963 D950 Open Open Open 1SS376 C970 Pre in SW950 SW960 SW955 Rec in B0.01 Play Ent. Edit.

  • Page 53: Parts List

    PARTS LIST ZD-1 Notes: 1. Prices and specifications are subject to change without pointer notice. 2. As for spare parts order and supply, refer to the “GUIDEBOOK for Spare parts Supply”, published separately. 3. The numbers in item column correspond to the...

  • Page 54

    Part Name Specification Q'ty R Remark ELECTRICAL PARTS AMP UNIT IC 401 1915 7129 IC/TC9260P 0911-205-6-00 B ZD-1 common IC 402 1910 0405 IC/TA8227P 0911-188-5-00 B ZD-1 common IC 403 1909 4171 IC/BA15218N 0911-083-1-00 B ZD-1 common N IC 404...

  • Page 55

    Part Code Part Name Specification Q'ty R Remark CD UNIT IC 701 1909 8257 IC/CXA1782BR 0911-179-6-00 B ZD-1 common IC 702 1909 8261 IC/CXD2508AR 0911-182-7-00 B ZD-1 common IC 703 1915 7492 IC/BA5941FP 0911-205-5-00 B ZD-1 common N IC 704...

  • Page 56

    Item Part Code Part Name Specification Q'ty R Remark 1915 7202 KNOB/POWER 4750-868-0-01 X ZD-1 common 1915 7203 LEVER/LOCK 4750-872-0-00 X ZD-1 common 1915 7204 GUIDE/KNOB 4750-873-0-00 X ZD-1 common 1915 7779 DOOR/CD 4750-809-0-05 X ZD-1 common 1915 7209 WINDOW/DOOR...

  • Page 57: Exploded Views

    EXPLODED VIEWS 41(2/2) 44(1/2) Model-C Only...

  • Page 58

    Z-14 Z-15 44(2/2) 44(1/2)

  • Page 60

    CASIO TECHNO CO.,LTD. Overseas Service Division 8-11-10, Nishi-Shinjuku Shinjuku-ku, Tokyo 160-0023, Japan AF0900181A...

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