JVC XM-PX70BU User Manual Download

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SERVICE MANUAL

PORTABLE MINIDISC PLAYER

No.20897

Jan. 2001

XM-PX70WT/BU/PN

Area Suffix

Hong Kong

Contents

Safety Precautions
Attention when

MD pick up is exchanged

Disassembly method

Adjustment method

Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
Attention when parts
are exchanged

1-2

1-3
1-4
1-9
1-10
1-10
1-11

1-24

Summary of Contents for XM-PX70BU

Page 1: ...70WT BU PN XM PX70WT BU PN Area Suffix UB Hong Kong Contents Safety Precautions Attention when MD pick up is exchanged Disassembly method Adjustment method Maintenance of laser pickup Replacement of laser pickup Description of major ICs Attention when parts are exchanged 1 2 1 3 1 4 1 9 1 10 1 10 1 11 1 24 ...

Page 2: ...e currnet check Electrical shock hazard testing After re assembling the product always perform an isolation check on the exposed metal parts of the product antenna terminals knobs metal cabinet screw heads headphone jack control shafts etc to be sure the product is safe to operate without danger of electrical shock Do not use a line isolation transformer during this check Plug the AC line cord dir...

Page 3: ...xhaust the electrified static electricity to the human body 3 Handling the optical pick up 1 Please return according to a correct procedure based on short processing after exchanging parts 2 Do not use a tester to check the condition of the laser diode in the optical pick up The tester s internal power source can easily destroy the laser diode 4 Attention when unit is disassembled Please refer to ...

Page 4: ...older assembly as shown in Fig 4 Move the marked b in the direction of the arrow and release it from the shaft Move the part c inward and pull out the holder assembly from the shaft 1 2 3 4 Removing the holder assembly See Fig 3 and 4 When reassembling first reattach the part c to the shaft of the chassis assembly And next fit the U shaped notch to the shaft ATTENTION MD door assembly MD door asse...

Page 5: ... out the eject unit Remove the screw D E F G and H attaching the chassis assembly respectively Disengage the three joints e of the bottom case and the battery holder Remove the chassis assembly and the jack cover at once 1 2 3 4 5 Removing the chassis assembly See Fig 5 to 7 Fig 5 Fig 6 Fig 7 Chassis assembly Side arm R Battery lid Tab d Joint e Joint e D B Battery lid Chassis assembly C Eject uni...

Page 6: ...ng procedures remove the MD door assembly the holder assembly chassis assembly and the main board Disconnect the flexible wire extending from the headphone jack from connector CN601 on the main board 1 When reassembling connect the flexible wire extending from the pickup to the connector on the main board and unsolder the short circuit round ATTENTION Before disconnecting the flexible wire extendi...

Page 7: ...p unit See Fig 11 Prior to performing the following procedures remove the MD door assembly the holder assembly the chassis assembly and the main board Removal of the MD mechanism section Do not spill flux on the gear and others ATTENTION When handling the pickup unit touch the parts marked in Fig 13 only ATTENTION Remove the screw L and the lead spring Pull out the shaft from the pickup 1 2 Removi...

Page 8: ...solder soldering k connecting the flexible wire to the feed motor Remove the two screws M attaching the feed motor 1 2 3 Removing the feed motor See Fig 14 When reassembling reattach the flexible wire with an adhesive tape and solder ATTENTION Chassis assembly Feed motor j Soldering k M Fig 14 Pickup unit M ...

Page 9: ...LCD Indication change OK MO DISC ADJUST Pre TG Insert the Pre master disc Executes by BASS LCD Indication change Pre DISC ADJUST Executes by BASS LCD Indication change XXYYZZ Press STOP RESET Executes by BASS LCD Indication Left out the test mode power off and END Press PLAY MODE DISPLAY BASS and PLAY key together more than 3sec at power off condition VOL next item VOL before item PLAY LASER Inser...

Page 10: ...he life of the laser diode has expired the following symptoms will appear 1 The level of RF output EFM output ampli tude of eye pattern will below Is the level of RFOUT under 0 35Vp p Replace it NO YES O K 3 Semi fixed resistor on the APC PC board The semi fixed resistor on the APC printed circuit board which is attached to the pickup is used to adjust the laser power Since this adjustment should ...

Page 11: ...lifier output GND in power amplifier output steps Power amplifier output Symbol FUNCTION CC2 CC2 A B 2 2 1 ref ref CC1 CC B A B BEEP OUTA Pin no B in power amplifier output steps Smoothness of level detection of boost BST amplifier input signal level variable control by input lever to boost AGC input terminal Output terminal of BST amplifier2 Terminal NF of BST amplifier2 Output BST amplifier1 NF ...

Page 12: ... output terminal 21dB ope amp input terminal Serial data input terminal Shift clock input terminal Latch input terminal Stand by setting terminal F0 count setting terminal Reference voltage output terminal EQ IF setting terminal BPF3T IF setting terminal Power supply BPF3T IF setting terminal Tracking error signal output terminal Sled error signal LPF capacitor connect terminal Sled error signal o...

Page 13: ...F COMF CPOUT CPC3 CP3 CPC2 CP2 CPC1 CP1 VCO RMAX RMIN VCOIN VCC MCLOCK CLKSEL S S BRAKE VCONT VCREF GND PGND FG2 FG SLOPE F R Controllor Timing controllor Phase Comparator 1 8 PWM VCO Full Wave Rectifilter Sensoeless Logic Charge Pump Voltage Driver Sample and Hard 1 Pin layout 2 Block diagram 1 12 36 25 37 48 24 13 ...

Page 14: ...set maximum oscillation frequency of VCO The terminal to set minimum oscillation frequency of VCO The terminal to control oscillation frequency of VCO The terminal to select inside and outside clock The terminal to oscillation sawtooth for PWM signal The terminal to oscillation sawtooth for soft switching signal The terminal to monitor CLOCK signal The GND for the part except the power section The...

Page 15: ...ILO RFI AVD1 MVCI PD0 A11 XOE FRDR FFDR VDC4 VSC4 SRDR FS4 SPFD SPRD SFDR TEST2 TEST1 FGIN TST2 EFM0 TEST3 VSI03 TST3 VDI03 SPCU SPDW SPDV TST4 SPCW SPCV VSC5 SLDW SLDV SLCV SLCU VDC5 BYPS TST5 SLCW DVDD1 D3 VSC3 VDC3 D0 D2 D1 XCAS IXWE A09 XRAS IXOE A07 A10 A08 DVI01 A00 VSI01 A05 A01 A06 A03 A04 A02 F256 XBCK VSC2 VDC2 DADT LRCK VDI00 TST8 ADDT MNT1 MNT0 VDC0 SENS XRST RPWR VDI OSC DVDD0 DA VDDL...

Page 16: ...a X tal osc circuit input OSC sel VDD 2 5V X tal osc circuit output Internal 16bit DRAM GND Internal 16bit DRAM GND OSC sel GND Internal DAC Lch output Internal DAC VDD Lch 2 5V Internal DAC GND Internal DAC GND VREF Lch Internal DAC VDD Rch 2 5V Internal DAC GND Rch Internal DAC Rch output Internal DAC VREF Rch Internal logic GND X tal frequency select L 45 1584MHz H 22 5792MHz Test terminal Conn...

Page 17: ...data input output Internal 16Mbit DRAM VDD Open Open External DRAM output chip enable output Open Open Open Internal 16Mbit DRAM GND External DRAM write enable output Analog PLL phase compare output Playback EFM comparator slice level input Playback EFM binarization signal output Clock input from external VCO Analog GND Playback EFM comparator bias current input Analog power supply 2 5V Filter inp...

Page 18: ...s servo drive PWM output Internal logic VDD 1 8V Internal logic GND Sled servo drive PWM output 176 4kHz clock output X tal system Spindle servo drive output Spindle servo drive output Sled servo drive PWM output Test terminal Connect to GND Test terminal Connect to GND Spindle CAV servo FG input Test terminal Open EFM output at recording Test terminal Connect to GND 2 5V I O Vss Test terminal Ope...

Page 19: ...ata clock Serial data input Serial data output Program enable Ground Power supply Not connected 1 Pin layout 3 Block diagram 2 Pin function DO EEPROM 2048bit 128 X 16 16 16 R W AMPS AND AUTO ERASE DECODER DATA REGISTER ADD BUFFER INSTRUCTION DECODE CONTROL AND CLOCK GENERATION INSTRUCTION REGISTER DI CS SK PE VREF VPP SW VPP GENERATOR Fnction ...

Page 20: ...S Vref VOUT VOUT 1 VDD 2 4 VSS 3 NC 1 2 3 4 VOUT VDD NC VSS Reset signal output terminal Power supply terminal Non connect VSS terminal Function Symbol Pin No 3 Block diagram 1 Pin layout 2 Pin function IC PST3421U X IC504 System reset ...

Page 21: ...PUT 1 4 PS H H H H H L OE L L L L H X FI L L H H X X RI L H L H X X FO L L H L L Z RO L H L L L Z X Don t Care Z High Impedance MPC17A139MTB X IC400 4ch bridge driver Vc Vc Vc V G V G L G AGND V D1 V D1 F O1 R O1 V D2 V D2 F O2 R O2 P GND V D3 V D3 F O3 R O3 P GND V D4 V D4 F O4 R O4 P GND R GND V G V G V G Vc Vc Vc Vc CLK PS FI1 RI1 GND FI2 RI2 FI3 RI3 FI4 RI4 OE CLOCK CLK Detector DC DC Converte...

Page 22: ...al Battery voltage detect terminal Connect to temp detect GND GND Pin No Symbol Function Pin No Symbol Function ANI5 ANI6 SPSEL AVSS VADJ AVREF1 RMRX RMTX SRDT SWDT SCLK BEEP PSW MONDATA MONCLK XRST2 TG ACB TRAIN XRST XLAT LVCTL LDON RFOFF SLOFF MUTE DIR VSS1 PS SS MON1 MON2 MONXLAT GND GND Non connect GND Non connect Voltage adjust Analog reference voltage Remocon data input terminal Remocon data...

Page 23: ...GND Ext Tr connection FB VDD CE GND EXT Pin No Symbol Function FB CE Error Amp Phase Compensation PWM Comparator Vref with Soft Start CE PWM PFM Controler Ramp Wave Generator OSC Buffer Driver VDD EXT GND XC6367B101M X IC901 IC921 IC941 Regulator 1 Pin layout 3 Block diagram 2 Pin function ...

Page 24: ...2A LV10423 202A Bottom case PN LV10423 003A LV10423 203A MD door assy BU LV32219 002A LV32219 202A MD door assy PN LV32219 003A LV32219 203A Marking non Marking have Parts Number WT is 1 kind of parts The 2 bottom case and 35 MD door assembly are indicated on Exploded view of general assembly there are two kind of parts at same color When you exchange parts confirm the marking and change same part...

Page 25: ...d in Japan 200101 O VICTOR COMPANY OF JAPAN LIMITED AUDIO COMMUNICATION BUSINESS DIVISION PERSONAL MOBILE NETWORK BUSINESS UNIT 10 1 1chome Ohwatari machi Maebashi city 371 8543 Japan No 20897 XM PX70WT BU PN ...

Page 26: ...DSP IC601 H P AMP H P JACK LCH RCH RMDATA MUTE PSW BEEP SCL DI DO KEY PLAYKEY AOUTL AOUTR SWDT SCLK XLAT SRDT MNT0 MNT3 SENS XRST SQSY XINT BYPS RST2 LDON TG A B C D I J TFDR TRDR FFDR FRDR FS4 SFDR SRDR W V U COM SS XBCK SPFG SPSD SPRD PS RFI VC PEAK BOTM ABCD FE AUX1 ADFG SE TE DTRF CKRF XLRF F0CONT APCREF SLD SLD FCS FCS TRK TRK Block diagram ...

Page 27: ... 3 16 330 DTC144EE X 1 330 1k 330 1 1 SSM3K01F X FMMT617 X 1 0 0047 330 330 NI 1 NI 0 NI 1 QGF0515F4 06X SI2305DS X 22 100 1 470k 10 100k 10k XC6367B101M X 0 047 CRS01 W 15k NSW0140 001X XC6367B101M X DTC144EE X DTC144EE X IC PST3421U X 1 1 1 1 NI NI DTA144EE X DTC144EE X 0 01 2SC4617 QR X 470K 2SB1219 RS X NI 0 22 680k 1k 0 1 1 NI NI 1 0 330P 22k 330P 22k 10 6 3 0 1 DTA143TE X 22 100k 0 NI 68k 0 ...

Page 28: ...C301 C302 R306 C325 R338 R320 R316 R315 R337 R336 R335 C454 R455 CN401 C463 IC450 R463 C452 C453 C462 C464 R454 C455 C450 C373 R352 C352 R380 R378 R364 R377 R379 C377 R450 R451 R354 C376 R376 C374 R373 C372 R372 R371 C371 R317 R318 CN301 IC2 IC502 C503 R527 C312 C308 R314 C4 R2 R3 R308 R310 C3 C2 C319 C320 C316 C318 R339 IC300 C310 C309 C311 R503 R323 R324 S502 R321 R325 R326 R504 R322 R328 C313 C...

Page 29: ...2 5 XM PX70WT BU PN I H A B C D E F G 1 2 3 4 5 6 M E M O ...

Page 30: ...s assemblies are not available as service parts Contents Exploded view of general assembly and parts list MD mechanism assembly and parts list Electrical parts list Packing materials and accessories parts list XM PX70WT BU PN 3 2 3 4 3 5 3 8 Area suffix UB Hong Kong ...

Page 31: ...XM PX70WT BU PN 3 2 Exploded view of general assembly and parts list Block No M M M 1 36 37 35 37 33 31 26 32 27 30 29 1 28 16 20 18 21 17 34 25 23 19 24 3 22 4 13 5 6 7 38 8 7 2 10 11 15 14 12 9 A A ...

Page 32: ...R 1 17 LV31332 003A CHG CONTACT 1 18 LV31333 005A CHG CONTACT 1 19 LV31334 003A BATT CONTACT 1 20 LV40241 006A SPECIAL SCREW 1 FOR B CON B 21 LV31335 005A B CONTACT ASSY 1 22 LV32223 001A BATT LID 1 XM PX70WT LV32223 003A BATT LID 1 XM PX70PN LV32223 002A BATT LID 1 XM PX70BU 23 VKZ4616 008 SCREW 1 B CONTACT ASSY 24 LV40242 001A MINI SCREW 1 PCB 25 LV30225 0A6A SPACER 1 FOR MECHA WIRE 26 LV40241 0...

Page 33: ...2MM 1 LV20882 001A CHASSIS ASS Y 1 2 QAR0113 001 FEED MOTOR 1 3 QYSPSFT1425M MINI SCREW 2 5 QAL0237 001 PICK UP 1 6 LV32031 001A LEAD SPRING 1 7 QYSPSGT1425N MINI SCREW 1 8 LV32114 001A LEAD SCREW 1 9 LV41132 001A METAL 1 10 LV41133 001A WHEEL GEAR 1 11 LV41134 003A SHAFT HOLDER 1 12 QYSPSFT1425M MINI SCREW 1 13 QAR0112 001 SPINDLE MOTOR 1 14 QYSPSFT1425M MINI SCREW 3 15 LV41141 002A WORM GEAR 1 1...

Page 34: ... 105X C CAPACITOR C 456 NCB31HK 222X C CAPACITOR C 457 NCB31HK 102X C CAPACITOR C 458 NCB31CK 473X C CAPACITOR C 459 NCB21AK 105X C CAPACITOR C 460 NCB31HK 682X C CAPACITOR C 461 NCB31CK 473X C CAPACITOR C 463 NCB21AK 105X C CAPACITOR C 500 NCB21AK 105X C CAPACITOR C 503 NCB31CK 104X C CAPACITOR C 504 NCB21AK 105X C CAPACITOR C 506 NCB31CK 104X C CAPACITOR C 507 NCB31CK 104X C CAPACITOR C 508 NCB3...

Page 35: ... RESISTOR R 352 NRSA63J 1R0X MG RESISTOR R 353 NRSA63J 1R0X MG RESISTOR R 354 NRSA6AJ 104W MG RESISTOR R 355 NRSA6AJ 0R0W MG RESISTOR R 356 NRSA6AJ 0R0W MG RESISTOR R 357 NRSA6AJ 0R0W MG RESISTOR R 364 NRSA6AJ 101W MG RESISTOR R 366 NRSA6AJ 101W MG RESISTOR R 367 NRSA6AJ 472W MG RESISTOR R 369 NRSA6AJ 102W MG RESISTOR R 371 NRSA6AJ 103W MG RESISTOR R 372 NRSA6AJ 104W MG RESISTOR R 373 NRSA6AJ 684W...

Page 36: ...D 154W MG RESISTOR R 948 NRSA6AJ 153W MG RESISTOR R 965 NRSA6AJ 474W MG RESISTOR R 966 NRSA6AJ 472W MG RESISTOR R 967 NRSA6AJ 220W MG RESISTOR S 60 NSW0140 001X DETECT SWITCH S 501 NSW0117 001X SLIDE SWITCH S 502 NSW0134 001X TACT SWITCH ALPS S 503 NSW0134 001X TACT SWITCH ALPS S 504 NSW0134 001X TACT SWITCH ALPS TH501 NAD0025 224X THERMISTOR X 300 NAX0439 001X CRYSTAL X 500 NAX0427 001X C RESONAT...

Page 37: ...XM PX70WT BU PN 3 8 A1 A10 P1 A5 A4 P3 A7 A8 A6 A2 A3 A9 P2 Packing materials and accessories parts list Block No M M M 3 Block No M M M 4 ...

Page 38: ...y Description Block No M4MM A 1 LVT0592 001A INST BOOK 1 ENG A 2 QAB0024 006 NI MH BATTERY 1 A 3 LV30791 001A BATTERY CASE 1 FOR NI MH BATT A 4 QAL0121 004 BATT CHARGER 1 AC R124 A 5 QAL0271 001 AC P ADAPTOR A 1 AA R9025 A 6 QAN0021 003 HEAD PHONE 1 XM PX70BU QAN0021 006 HEADPHONE 1 XM PX70WT QAN0021 007 HEADPHONE 1 XM PX70PN A 7 QAL0251 004 REMOCON ASSY 1 XM PX70PN QAL0251 003 REMOCON ASSY 1 A 8 ...

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