Casio ZD-1 Service Manual Download

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(without price)

ZD-1

MD CD SYSTEM

INDEX

Model-B: U.S.A.
Model-C: Europe

SEP.1998

Summary of Contents for ZD-1

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

Page 2: ...Schematic Diagrams 46 Tuner 46 AMP PS 47 MD 48 CD 49 Front 50 Parts List 51 Exploded Views 55 CONTENTS When the power cord is plugged into an AC household outlet or the unit is loaded with the batteries Demonstration Mode starts To cancel the Demonstration mode press the POWER button or hold the BBS button pressed for more than 3 seconds When the unit is moved to a location where the temperature i...

Page 3: ... disc digital audio system Laser Semiconductor laser Channel 2 channels Frequency response 20 to 20 000Hz 3dB Wow and flutter Less than measurement limit TUNER SECTION Tuning range FM 88 to 108MHz AM 530 to 1710kHz for Model B 530 to 1600kHz for Model C Antenna FM Telescopic antenna AM Loop antenna supplied GENERAL SECTION Dimensions 360 W x 158 H x 244 D Weight 4 0kg without batteries Power sourc...

Page 4: ...ONS Figure 2 2 CD Door Top Panel Kit CaseKit 3 Open the CD door remove four screws B holding the case kit 1 Remove the battery cover and batteries 2 Remove ten screws A holding case B unit Figure 1 Case B Unit Battery Cover ...

Page 5: ... 8 Remove three screws F holding the CD mechanism set 9 Pull out the jog knob 10 Remove six screws G holding the MD assembly 11 Remove seven screws H holding the display unit 12 Remove screw I holding the LED PCB 3 Function Knob Tuning Knob CD Unit Tuner Unit CD Mechanism Set AMP Unit Top Case Assembly Figure 3 MD Assembly Case Assembly Jog Knob LED PCB I Model C only Figure 4 ...

Page 6: ...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 Figure 6 4 Varicon Gear Tuner Gear Pointer Mark Tuner Chassis K Figure 5 Varicon Gear Pointer Varicon Tuner Gear L Tuner Chassis ...

Page 7: ...tricity build up on the human body 2 Grounding for the work table Be sure to lay on the table a conductive sheet with impedance lower than 106 Ω such as a sheet of copper which is grounded 3 As static electricity build up on clothes is not drainded away be careful not to let your clothes touch the unit 4 The short pad on the pick up PCB of a spare part is short circuited for protection during ship...

Page 8: ... MIX AM RF In FM RF Out VCC 1 FM OSC AM OSC DET Out MPX In LPF1 LPF2 VCO GND VCC R ch L ch FM RF In GND1 FM MIX AM MIX AGC VCC 2 AM IF In FM IF In GND2 QUAD 3 1 2 4 To Amplifier Block 22 21 20 19 18 17 16 15 14 13 24 23 D3 Loop Antenna L2 L5 L4 L3 SW1 BAND SW AM FM Stereo FM MONO Rod Antenna L8 CF1 CF2 L9 FM Signal AM Signal L7 1 2 3 4 5 7 6 8 9 10 11 12 ...

Page 9: ...wer Amplifier Circuit IC402 Mute Circuit Q204 Q304 Electron Volume Circuit IC401 BBS Circuit Q202 Q302 Q403 Q404 Q405 CN402 Record Amplifier IC403 V BAT Carcuit D417 C421 R430 PSCONT VCC 9V DC 7V CN404 CN402 EL Drive Power Supply Circuit Q452 D450 MD Play L ch MD Play R ch CD Play L ch CD Play R ch Tuner In L ch Tuner In R ch Line In L ch Line In R ch MD Record L ch MD Record R ch MD V BAT MD 5 5V...

Page 10: ...trol Driver 9V 5V 9V 9V 9V Q704 705 CD 9V Power Driver 9V IC708 CD 5V Power Driver 5V IC704 Micro Processor X703 16MHz X702 32 769KHz Q713 Door SW Driver SW706 Door SW Q901 902 Mute Circuit IC707 Analog Filter IC702 Digital Signal Processior X701 16 93MHz Q702 Laser Power Driver Q701 Laser Driver Q702 703 Anti Traverse Circuit IC701 Servo Signal Processor IC703 Motor Driver CD Mechanism Laser Coup...

Page 11: ...17 18 19 CN502 19P FFC BCK M GND ADDT OSC IC502 TC7WU04 X501 22MHz IC501 S 81340HG SUPPLY 1 2 3 4 5 6 7 8 9 10 11 CN503 A_GND M 5V MD_OUT R MD_OUT L TO AMP PCB MUTE CIRCUIT Q504 Q502 Q503 VCC1 1 VCC1 2 VINR 3 VREF1 4 VREF2 5 VINL 6 1PDAD 7 1PDDA 8 SYSCK 9 LRCIN 10 BCKIN 11 DOUT 12 DGND 13 VDD 14 DIN 15 ZOBIT 16 DEM1 17 DEM0 18 VOUTL 19 VOUTR 20 VCOM 21 AGND2 22 AGND1 23 VCC2 24 IC503 PCM3003 3 3V ...

Page 12: ...trol Switch Circuit SW950 SW961 KEYIN1 REMOTE JOG1 JOG0 REMOPOWER CN952 From CD UNIT Remocon Photoreceiver IC951 Rotary Encoder EN950 EL Panel EL950 EL Draive Circuit IC951 From AMP UNIT VCC GND EL CONT AC GND 8V To CD UNIT CN101 C105 Rectification Circuit D101 D104 Fuse F101 Power TRANS T101 J101 AC Jack Battery 9V AC Cable PS Unit 10 ...

Page 13: ...d no skip on the playback sound b Black Dot on Read Out Side TCD 726 A BEX By using track No 13 0 5 mm there shoud not be no noise and no skip on the playback sound c Finger Print TCD 726 A BEX By using track No 18 there shoud not be no noise and no skip on the playback sound d Scratch on Read Out Side TCD 721R A BEX By using track No 9 650 µm there shoud not be no noise and no skip on the playbac...

Page 14: ...F Balance Adjustment Figures 8 and 11 A B 0V Vref A B Step Connect Setting Adjust Result Play the regular disc 1 See Figure 8 VR702 Keep the button depressed 2 Oscilloscope CD PCB GND TP706 TP710 Figure 8 E F balance signal Step Connect Setting Adjust Result Oscilloscope CD PCB Adjust VR701 for the amplitude of the waveform at maximum VR702 Measuring on oscilloscope Play the regular disc See Figur...

Page 15: ...710 0V 100 mV p p Tracking Servo Adjustment Figures 10 and 11 Step Connect Setting Adjust Result Oscilloscope CD PCB VR703 Play the regular disc See Figure 10 1 Figure 10 3 2 Swap the regular disc for the test disc A BEX TCD 726 and play it at the black dod of 600 µm Confirm that there is no skipping If there is any skipping adjust VR 703 to reduce the tracking servo gain until no skipping occurs ...

Page 16: ...14 CD Adjustment Points Top View Bottom View Figure 11 VR703 VR704 VR702 VR701 TP751 TP709 TP706 TP710 TP750 ...

Page 17: ...3 Is the audio signal present at the output terminals 4 Press SEARCH key Can a selected track number be searched smoothly 5 OK No Yes No No Yes Yes Yes Load a disc close CD door No Press PLAY PAUSE key Are total track number displayed 2 Yes No Is CD CLOSE display on LCD L ch CN709 9 pin R ch CN709 7 pin ...

Page 18: ...nd IC705 Is the waveform at pin 30 of IC704 like that shown in Fig 12 No Yes Check Q713 Check circuit around IC706 Does 16 MHz clock pulse appear at pin 31of IC704 No Yes Check X703 Check circuit around X703 Check IC704 Check circuit around IC704 Check soldering CN705 and FFC Figure 12 5 V Power on 100 mS ...

Page 19: ...n 1 of IC708 No Yes Check SW706 Check Q707 Q708 and Q903 Check circuit around Q707 Q708 and Q903 Is the waveform at base of Q713 like that shown in Fig 14 Does 9 V appear at pin 3 of IC704 No Yes Check IC708 Check circuit around IC708 Does 9 V appear at emitter of Q704 No Yes Check Q704 and Q706 Check circuit around Q704 and Q706 17 Figure 13 5 V Door close Figure 14 5 V Door close ...

Page 20: ...3 Total track number is not displayed 18 A C About 6 sec About 15 sec 3 Check how much times it takes until NO DISC is displayed after CD door has closed About 10 sec B ...

Page 21: ... shown in Fig 16 Check IC701 Is the waveform at pin 31 RFO of IC701 like that shown in Fig 15 Check CN701 Check soldering IC701 Check IC701 Check pickup Is the waveform at pin 1 FE of IC701 like that shown in Fig 17 Check pins 25 26 and 27 of IC701 Check IC701 Check circuit around IC701 No No No No No Yes Yes Yes Yes Yes Figure 15 Figure 16 E 5V 19 E more than 1V Is the waveform at pin 2 FEI of IC...

Page 22: ...A2 Dose 9 V appear at pins 19 of IC703 Check circuit around IC703 Is waveform at pin 16 of IC703 like that shown in Fig 19 Check CN701 Check pickup Is waveforn at pin 6 FEO of IC701 like that shown in Fig 20 No No No Yes Yes Yes A2 Check circuit around IC701 Check IC703 Check circuit around and soldering IC703 Check IC701 and IC702 750mV Figure 20 ...

Page 23: ...ble unit Is waveform at pin 13 of IC703 llike that shown in Fig 21 Is waveform at pin 11 of IC703 like that shown in Fig 22 Check CN702 and CN703 Check disc motor Check CN703 Yes Yes Yes Yes No No No No Check soldering IC701 Check IC701 Figure 21 2 5V 21 B Check soldering IC702 Check IC702 Figure 22 ...

Page 24: ... Amp lines VR703 adjustment is no good Readjust VR703 Refer to CD Adjustments Check circuit around IC703 Check CN701 VR704 adjustment is no good Readjust VR704 Refer to CD Adjustments Check pickup No No No Yes Yes Yes Figure 23 Figure 24 C 100mV 50mV 22 Is pin 3 DEFECT of IC701 high No Yes Check IC701 Is waveform at pin 18 of IC703 like that shown in Fig 26 No Yes Check circuit around IC701 Check ...

Page 25: ...Q902 No Yes 4 4 No audio signal to output terminals Does 4 23 MHz appear at pin 11 CLOK of IC702 No Yes Does 88 2 kHz appear at pin 42 LRCK of IC702 No Yes Does digital signal appear at pin 9 DATA of IC702 No Yes Check IC707 Check circuit around IC707 Check circuit around and soldering IC702 Check IC702 ...

Page 26: ...IC701 like that shown in Fig 27 VR702 adjustment is no good Readjust VR702 Refer to CD Adjustments Is waveform at pin 42 TEO of IC701 like that shown in Fig 28 Check CD mechanism and disc motor Check pickup Check IC701 Yes Yes No No 24 Press the or key Figure 28 Figure 27 0 0 ...

Page 27: ...d Replace the MD with another recordable one Use a pre recorded MD to play Use an MD on which music has been pre recorded Replace it with a recordable MD Shorten the disc name or the track name Turn off the power and remove the MD Move the prevention tab the recordable side Replace the MD with another recordable one Turn off the power and do not operate the unit until the temperature returns to no...

Page 28: ...26 PCB VIEWS Tuner PCB Top ...

Page 29: ...27 AMP PCB Top ...

Page 30: ...28 Display PCB Top Display PCB Bottom ...

Page 31: ...29 MD PCB Top ...

Page 32: ...30 MD PCB Bottom ...

Page 33: ...31 CD PCB Top ...

Page 34: ...32 CD PCB Bottom ...

Page 35: ... 1 7 CN401 CN404 AMP PCB 2 1 CN101 1 3 PS PCB Model C Only 1 2 4 1 CN400 1 9 1 11 CN402 CN403 LED PCB 1 15 Red Black 1 2 2 1 Pickup Preset Switch Sled Motor Disc Motor Pickup CD MECHANISM CN704 CN702 CN703 CN701 1 2 1 2 15 1 1 2 3 1 CN710 1 9 CN709 White Shield 7 1 CN707 CN706 1 11 1 23 CN705 1 11 11 1 13 1 1 19 CN501 CN502 CN503 CN504 Shield White Shield White White Shield CD PCB MD PCB 16 1 19 1...

Page 36: ... DET AGC AM MIX FM MIX 24 23 1 2 3 4 5 7 6 8 9 10 11 12 AM RF In FM RF Out VCC 1 FM OSC AM OSC DET Out MPX In LPF1 LPF2 VCO L ch Out R ch Out FM RF In GND1 FM MIX AM MIX AGC VCC 2 AM IF In FM IF In GND2 TUN LED ST LED QUAD L ch Volume L ch Latch R ch Latch Data Decoder STB Generator Shift Register 13 bit 16 1 15 14 13 12 11 10 9 Out In LD1 LD2 A GND STB DATA R ch Volume VSS VDD 2 3 4 5 6 7 8 Out I...

Page 37: ...cuit Thermal Shut Down Protection Circuit 9 Vcc1 Vcc2 B S 1 Out 1 Power GND 30 kΩ 45Ω In 1 NF 1 Ripple In 2 NF 2 30 kΩ 45Ω Pre GND F In OUt 2 B S 2 Ch 1 Ch 2 1 6 12 7 IC403 BA15218N 1 2 1 2 3 4 5 6 7 8 Out 1 In 1 In 1 GND In 2 In 2 Out 2 VCC 1 8 35 ...

Page 38: ...IC404 PQ15RW11 Vo Vadj GND Vin 1 2 3 4 1 2 4 3 IC IC501 S 81340HG KJ T1 IC502 TC7WU04FU TE12L 1 4 8 5 8 7 1 2 6 3 4 5 VCC Out 1 In 2 Out 3 In 1 Out 2 In 3 GND 1 2 3 VIN GND Vref Parasitic Diode 3 1 VOUT 2 ...

Page 39: ...odulator Multi level Delta sigma Modulator Delta sigma Modulator Delta sigma Modulator Decimation Low Cut Filter ADC Decimation Low Cut Filter Interpolation Filter X8 Oversampling Interpolation Filter X8 Oversampling DAC Clock Reset and Power Down Mode Control Interface Serial Interface VINL VREF1 VCOM VREF2 VINR VOUTL VOUTR LRCIN BCKIN DIN DOUT 20BIT DEM0 DEM1 PDAD PDDA AGND2 VCC 2 AGND1 VCC 1 VC...

Page 40: ...38 IC505 BA10358 8 7 6 5 1 2 3 4 In 2 In2 Out 2 VCC Out 1 In 1 In 1 GND 2 1 1 4 8 5 ...

Page 41: ...mparator ATSC FS4 Defect TM1 DFCT FS2 FS1 Comparator TZC FCS Phase Compensation TG1 LPF Comparator HPF Comparator FZC Comparator TM7 TG2 F Set TA O TM 2 SL P SL M TM3 TM4 TM6 TM5 SL O I SET Tracking Phase Compensation ISET VCC TOG1 3 BAL1 3 FS1 4 TG1 2 TM1 7 PS1 4 EF Amp TTL IIL IIL Date Register Input Shift Register Adress Decoder Output Decoder IIL TTL CLK XLT DFC1 IIL TTL LEVEL MIRR FOK F FE BI...

Page 42: ... A Interface Error Corrector 16K RAM EFM Demodulator SUB Code Processor CPU Interface Servo Auto Sequencer Digital PLL Asymmetry Corrector Clock Generator EMPHI LRCKI PCMDI BCKI MUTE BCK PCMD LRCK WDCK C2PO RFCK MNTO MNT1 MNT3 WFCK EMPH GFS XUGF GTOP NLPWM LPWM RPWM NRPWM DOUT XROF LOCK MDS MDP MON SQCK SQSO EXCK SBSO SCOR XLON SPOA C CLOK XALT DATA SENS CLKO XLTO DATO XTSL FSTT C4M RF CLTV FOK SE...

Page 43: ... 3 4 5 6 7 8 9 10 11 12 13 14 Level shift Level shift Level shift Level shift MUTE 13 3K VIN4 VIN4 VIN3 VIN3 OP Out OP In OP In 10K 10K 13 3K 13 3K 13 3K 10K 10K GND NC VCC VO3 VO3 VO4 VO4 VCC BIAS In VIN1 VIN1 VIN2 VIN2 GND GND MUTE VCC VO2 VO2 VO1 VO1 28 15 1 14 ...

Page 44: ...1 ADJ AVSS AVREF TEX TX EXTAL XTAL RST V DD V SS Clock Generator System Control PA0 PA7 PB0 PB7 PC0 PC7 PD0 PD7 PE0 PE3 PE4 PE5 PF0 PF6 PF7 PG0 PG7 PH0 PH7 PI0 PI7 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 PF3 S...

Page 45: ...IC705 S 81350HG KD T1 IC706 RH5VL29CA T1 43 1 2 3 Vref 2 1 VDD GND OUT 3 1 2 3 VIN GND Vref Parasitic Diode 3 1 VOUT 2 ...

Page 46: ...44 IC707 BA4510F IC708 NJM2930F05 In 2 In2 Out 2 VCC Out 1 In 1 In 1 VEE 2 1 1 4 8 5 1 2 3 4 5 6 7 8 3 2 1 2 1 3 Input Output Common ...

Page 47: ...Circuit Charging Pump Circuit Level Shifter Deviding Circuit Oscillator for boosting voltage Level Shifter Deviding Circuit Oscillator for EL High Voltage Switching Circuit 5 4 7 6 3 8 10 11 12 9 2 1 14 13 VDD LDR CHV OUT1 OUT2 ENA CPO CP1 CP2 VSS 1 OCL1 OCL2 OCE1 OCE2 1 2 3 4 5 ABLC BPF TRAP AMP Limiter Detector Waveform Shaper RL VCC VOUT GND 2 3 1 GND 4 GND 5 ...

Page 48: ...10V C16 3 3 25V R7 1K C17 C21 1000PF P S R8 12K SVR1 10K B R10 15K R9 15K C19 100 16V C20 0 022 X MTZJ5 1B D3 SW1 BAND SW TA8167N AIN FOT VC1 FOS AOS DET MPX LP1 LP2 VCO L CH R CH QUD SL TL GD2 FIF AIF VC2 AGC AMX FMX GD1 FMI 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 R4 1 0 0 1SS133 D2 AM FM M FM S R3 10 CH 8PF C5 3 12PF 0 022 X SD115 CH C4 18 27PF SL 22PF C24 3300PF X D5 1SS1...

Page 49: ...307 0 1 R349 10k C309 4 7 50V R314 2 2k C306 6800p R312 560k C413 C311 4 7 50V R315 39k R316 39k R317 180k C313 6800p R322 2 2k R319 330k C315 1 50V R411 10k D415 1SS133 C312 0 1 50V R323 2 2k R347 8 2k C330 1500p C409 22 16V R410 220 R348 330k C410 470 10V C316 4 7 50V C317 4 7 50V C408 0 01 R404 10k R405 10k C407 3 3 50V D408 7 5B D407 7 5B C319 R324 D405 RB100A C322 100 16V C405 2200 16V R327 3...

Page 50: ... EMPHASIS TP32 C522 4 7u C521 C524 4 7u C523 C525 4 7u C526 0 1 R524 C542 0 C549 R528 Q503 DTC114T L505 JP TP11 JP586 FBA04HA900 A IN L D GND CD D OUT CD TP13 SHIELD PLATE TP12 L524 10uH W BK 1 2 TO CD CTS P DOWN SYSTEM RST RTS TXD RXD TEMPDET GND UCOMGND TO CONTOL 1 2 3 4 5 6 7 8 9 10 11 CN504 11P FFC R611 0 R613 0 A B C D E F TP14 R615 1k R614 1k R612 1k C504 100u 8 4 7 1 IC502A TC7WUO4FU 2 6 IC...

Page 51: ...3 1 3 V O 2 1 2 V O 2 1 1 V C C 1 0 M U T E 9 G N D 8 G N D 7 V I N 2 6 V I N 2 5 V I N 1 4 V I N 1 3 B I A S 2 V C C 1 V O 4 1 5 V O 4 1 6 V O 3 1 7 V O 3 1 8 V C C 1 9 N C 2 0 G N D 2 1 O P I N 2 2 O P I N 2 3 O P O U T 2 4 V I N 3 2 5 V I N 3 2 6 V I N 4 2 7 V I N 4 2 8 IC703 BA5941FP C737 F0 1 C741 F0 1 C743 470 C736 F0 1 C742 F0 1 C770 47 R739 12K R741 22K 5V R742 000 C734 47 C735 B0 01 C954 ...

Page 52: ...12 11 10 9 8 7 6 5 4 3 2 1 SW956 Disp C960 Open SW957 Del C961 Open SW958 Chara C962 Open SW959 Memo R972 R973 R974 27K 47K 100K C Open SW Open SW961 Rec C964 Open C965 Open R980 R979 47K 27K C951 0 1uF R950 1K D950 1SS376 R951 470 C952 CH470P R955 Open R955 Open L950 10uH C953 B0 01 C954 10u 6 3V L951 470uH R952 100K R953 3 9M R954 Jumper L952 Ferrite Bead GND VCC Elcont 3 2 1 2 1 2 1 CN950 CON2 ...

Page 53: ...pecifications 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 same numbers in drawing 51 ...

Page 54: ...9 COIL OSC 10 MW OA 812631 0014 126 0 00 1 X ZD 1 common L 004 1909 3372 COIL 0014 312 0 00 1 X ZD 1 common L 005 006 1909 3371 COIL 0013 024 0 00 1 X ZD 1 common N L 007 1915 7750 COIL FM IFT 10 F 812630 0012 009 0 00 1 X ZD 1 common N L 008 1915 7751 COIL AM IFT 10 A 814867 0012 339 0 00 1 X ZD 1 common N L 009 1915 7752 COIL FM IFT 10 F 812628 0012 010 0 00 1 X ZD 1 common Switch SW 001 1915 71...

Page 55: ...937 VOLUME CONTROL SF 100K 0031 834 1 04 1 C ZD 1 common Oscillator N X 701 1915 7765 OSCILLATOR CERAMIC 16 93MXJ040 0038 803 0 00 1 X ZD 1 common N X 702 1915 7766 OSCILLATOR CRYSTAL 32 768KHz 0038 201 0 00 1 X ZD 1 common N X 703 1915 7767 OSCILLATOR CRYSTAL 16 00MHZ 0038 202 0 00 1 X ZD 1 common DISPLAY UNIT IC N IC 950 1915 7768 IC REC SPS 444 1 0039 648 0 00 1 B ZD 1 common N IC 951 1915 7769...

Page 56: ...X ZD 1 common 32 1915 7248 KNOB EJECT 4750 864 0 01 1 X ZD 1 common 33 1915 7249 PANEL CENTER 4750 808 0 01 1 X ZD 1 common 34 1915 7252 UNIT CD MECHANICAL KSM 542AAA 4750 150 0 00 1 A ZD 1 common 35 1909 4774 GEAR 2401 872 0 00 1 X ZD 1 common 36 1909 4775 HOLDER GEAR 2401 873 0 00 1 X ZD 1 common 37 1915 7253 SPEAKER 80PF173A 0023 279 0 0013 2 C ZD 1 common N 38 1915 7784 SPRING EXT 4750 307 0 0...

Page 57: ...55 EXPLODED VIEWS 1 3 37 39 27 21 26 30 33 48 44 1 2 Model C Only 24 24 31 32 29 28 41 2 2 37 45 46 47 ...

Page 58: ...56 2 3 3 Z 15 6 4 22 16 18 9 11 10 44 2 2 12 34 5 24 24 15 40 14 17 25 23 13 35 36 44 1 2 42 18 2 1 Z 14 ...

Page 59: ...57 3 3 19 20 38 7 1 7 43 ...

Page 60: ...AF0900181A CASIOTECHNO CO LTD Overseas Service Division 8 11 10 Nishi Shinjuku Shinjuku ku Tokyo 160 0023 Japan ...

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