JVC-XVNA70BK-cd-sm 维修电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LIMITEDNo.XA0112003/10DVD AUDIO/VIDEO PLAYERXA011200310XV-NA70BK,XV-NA77SLTABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2、. 1-32SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-83DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、 1-94ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-165TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、 . . . . 1-23258147369010+10TITLE/GROUPTV/VIDEOCANCELRETURNPAGEVOLVOL+ CH+CHVFPZOOMAMPVOLAUDIOfs/Rate3DPHONICSUB TITLEANGLEDIMMERREPEATOPEN/CLOSETV1TV2TV3TV4TV5TV6TV7TV8TV9TV-/-TV0MUTINGTVDVDNEXTPREVIOUSSELECTCLEARSLOW-SLOW+TOPMENUMENUONSCREENCHOICEENTERSTANDBY/ONTVDVDPROGRESSIVE SCANArea Suffix (XV

5、-NA70BK)J - U.S.A.C - CanadaArea Suffix (XV-NA77SL)J - U.S.A.C - CanadaB - U.K.E - Continental EuropeEN - Northern EuropeEV - Eastern EuropeEE - Russian FederationA - AustraliaUF - ChinaUJ - U.S.A.MilitalyUS - SingaporeUW - Brazil,Mexico,PeruRadioFans.CN 收音机爱 好者资料库1-2 (No.XA011)SPECIFICATIONFor U.S.

6、A. Specifications and appearance are subject to change without prior notice. Manufactured under license from Dolby Laboratories. Dolby, MLP Lossless and the double-D symbol are trademarks of DolbyLaboratories. DTS and DTS Digital Surround are registered trademarks of Digital Theater Systems, Inc.Gen

7、eralReadable discsDVD AUDIO, DVD VIDEO, DVD-R (Video format), DVD-RW (Video format/VRformat), DVD-RAM (VR format), SVCD, Video CD, Audio CD (CD-DA), MP3/WMAformat, JPEG, CD-R/RW (CD-DA, SVCD, Video CD, MP3/WMA format, JPEG)Video formatREMOTE, 480i (Interlaced scan)/480p (Progressive scan) selectable

8、OtherPower requirementsAC 120 V , 60 HzPower consumption16 W (POWER ON), 2.0 W (STANDBY mode)Mass2.1 kg (4.7 lbs)Dimensions (W H D)435 mm 45 mm 270.5 mm(17-3/16 inch 2-13/16 inch 10-11/16 inch)Video outputsCOMPONENT (pin jacks)Y Output: 1.0 Vp-p (75 )PB/PR Output: 0.7 Vp-p (75 )VIDEO OUT (pin jack)1

9、.0 Vp-p (75 )S-VIDEO OUT (S jack)Y Output: 1.0 Vp-p (75 )C Output: 286 mVp-p (75 )Horizontal resolution500 lines or moreAudio outputsANALOG OUT (pin jack)2.0 Vrms (10 k)DIGITAL OUT (COAXIAL) 0.5 Vp-p (75 termination)DIGITAL OUT (OPTICAL)-21 dBm to -15 dBm (peak)Audio characteristics Frequency respon

10、seCD (sampling frequency 44.1 kHz):2 Hz to 20 kHzDVD (sampling frequency 48 kHz):2 Hz to 22 kHz(4 Hz to 20 kHz for DTS andDolby Digital bitstream signals)DVD (sampling frequency 96 kHz):2 Hz to 44 kHzDVD (sampling frequency 192 kHz/176.4kHz):2 Hz to 88 kHzDynamic range16 bit: More than 100 dB20 bit/

11、24 bit: More than 110 dBWow and flutterUnmeasurable (less than 0.002%)Total harmonic distortion16 bit: less than 0.0018%20 bit/24 bit: less than 0.0012%RadioFans.CN 收音机爱 好者资料库(No.XA011)1-3SECTION 1PRECAUTION1.1Safety Precautions(1) This design of this product contains special hardware andmany circui

12、ts and components specially for safety purpos-es. For continued protection, no changes should be madeto the original design unless authorized in writing by themanufacturer. Replacement parts must be identical tothose used in the original circuits. Services should be per-formed by qualified personnel

13、 only.(2) Alterations of the design or circuitry of the product shouldnot be made. Any design alterations of the product shouldnot be made. Any design alterations or additions will voidthe manufacturers warranty and will further relieve themanufacture of responsibility for personal injury or propert

14、ydamage resulting therefrom.(3) Many electrical and mechanical parts in the products havespecial safety-related characteristics. These characteris-tics are often not evident from visual inspection nor can theprotection afforded by them necessarily be obtained by us-ing replacement components rated f

15、or higher voltage, watt-age, etc. Replacement parts which have these specialsafety characteristics are identified in the Parts List of Ser-vice Manual. Electrical components having such featuresare identified by shading on the schematics and by ( ) onthe Parts List in the Service Manual. The use of

16、a substitutereplacement which does not have the same safety charac-teristics as the recommended replacement parts shown inthe Parts List of Service Manual may create shock, fire, orother hazards.(4) The leads in the products are routed and dressed with ties,clamps, tubings, barriers and the like to

17、be separated fromlive parts, high temperature parts, moving parts and/orsharp edges for the prevention of electric shock and firehazard. When service is required, the original lead routingand dress should be observed, and it should be confirmedthat they have been returned to normal, after reassem-bl

18、ing.(5) Leakage shock hazard testingAfter reassembling the product, always perform an isola-tion check on the exposed metal parts of the product (an-tenna terminals, knobs, metal cabinet, screw heads,headphone jack, control shafts, etc.) to be sure the productis safe to operate without danger of ele

19、ctrical shock.Do notuse a line isolation transformer during this check. Plug the AC line cord directly into the AC outlet. Using aLeakage Current Tester, measure the leakage currentfrom each exposed metal parts of the cabinet, particular-ly any exposed metal part having a return path to thechassis,

20、to a known good earth ground. Any leakage cur-rent must not exceed 0.5mA AC (r.m.s.). Alternate check methodPlug the AC line cord directly into the AC outlet. Use anAC voltmeter having, 1,000 per volt or more sensitivityin the following manner. Connect a 1,500 10W resistorparalleled by a 0.15F AC-ty

21、pe capacitor between an ex-posed metal part and a known good earth ground.Measure the AC voltage across the resistor with the ACvoltmeter. Move the resistor connection to each exposed metalpart, particularly any exposed metal part having a returnpath to the chassis, and measure the AC voltage across

22、the resistor. Now, reverse the plug in the AC outlet andrepeat each measurement. Voltage measured any mustnot exceed 0.75 V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). 1.2Warning(1) This equipment has been designed and manufactured tomeet international safety standards.(2) It is the legal re

23、sponsibility of the repairer to ensure thatthese safety standards are maintained.(3) Repairs must be made in accordance with the relevantsafety standards.(4) It is essential that safety critical components are replacedby approved parts.(5) If mains voltage selector is provided, check setting for loc

24、alvoltage.1.3CautionBurrs formed during molding may be left over on some partsof the chassis. Therefore, pay attention to such burrs in the case of pre-forming repair of this system.1.4Critical parts for safetyIn regard with component parts appearing on the silk-screenprinted side (parts side) of th

25、e PWB diagrams, the parts that areprinted over with black such as the resistor ( ), diode ( )and ICP ( ) or identified by the mark nearby are criticalfor safety. When replacing them, be sure to use the parts of thesame type and rating as specified by the manufacturer. (This regulation dose not Excep

26、t the J and C version)Good earth groundPlace this probe on each exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE1-4 (No.XA011)1.5Preventing static electricityElectrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric

27、, etc. is discharged, can destroy the laserdiode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.1.5.1 Grounding to prevent damage by static electricityStatic electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD pla

28、yers. Be careful to use proper grounding in the area where repairs are being performed. (1) Ground the workbenchGround the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing thetraverse unit (optical pickup) on it.(2) Ground yourselfUse an an

29、ti-static wrist strap to release any static electricity built up in your body. (3) Handling the optical pickup In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement opticalpickup are shorted. After replacement, return the shorted part

30、s to their original condition. (Refer to the text.) Do not use a tester to check the condition of the laser diode in the optical pickup. The testers internal power source can easilydestroy the laser diode. 1.6Handling the traverse unit (optical pickup)(1) Do not subject the traverse unit (optical pi

31、ckup) to strong shocks, as it is a sensitive, complex unit. (2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to thereplacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be

32、careful not to take too longa time when attaching it to the connector. (3) Handle the flexible cable carefully as it may break when subjected to strong force. (4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.1MConductive material(conductive sheet

33、) or iron palate(caption)Anti-static wrist strap(No.XA011)1-51.7Importance administering point on the safety B104 B119 C670 C678 C680 C681 C683 C684 C853 C861 C902 C904 C905 C906 C907 C908 C913 C914 C918 C950 C951 C952 C953 C958 C965 C966 C967 C980 C981 CN651 CN861 CN862 R907 CN903 CN904 CP951 D851

34、D852 D901 D903 D904 D905 D951 D952 D954 D955 D956 D957 D960 EP951 EP952 EP953 EP954 FC901 FC902 IC901 IC904 J601 J603 J851 L851 L852 L901 L951 L952 L953 L954 L955 P901 PC901 Q611 Q612 Q852 Q951 R691 R692 R693 R694 R655 R658 R662 R663 R664 R665 B601 R679 R680 R854 C850 B141 B221 R901 R902 R903 R904 R

35、905 R906 R910 R912 R915 R951 R954 RA1 RA2 S601 S901 T901 X851 B407 B201 B105 B401 B402 B505 B213 B303 B113 B701 B507 B109 B501 B107 CN902 B112 B207 B111 B108 B116 CN901 B115 B210 B304 B404 B403 B120 B308 B502 B214 B310 B309 B311 B504 B312 B139 B313 B132 B126 B125 B124 B123 C955 B136 B405 B406 B305 B

36、130 B129 B128 B127 B131 B307 B211 B133 B134 B306 B301 B202 B121 B702 B204 B137 B801 B302 B106 B506 B602 B205 B140 B135 B138 B122 C959 C963 C964 C988 C691 C693 C695 C672 C674 C676 B212 B209 B603 D953 B503 B802 B110 B114 B203 B206 B208 Full Fuse Replacement MarkingGraphic symbol mark (This symbol mean

37、s fast blow type fuse.)should be read as follows ;FUSE CAUTIONFOR CONTINUED PROTECTION AGAINST RISKOF FIRE, REPLACE ONLY WITH SAME TYPEAND RATING OF FUSES ;F901 : 1.6 A / 125 VF901 : 1.6 A / 125 VMarquage Pour Le Remplacement Complet De FusiblePRECAUTIONS SUR LES FUSIBLESPOUR UNE PROTECTION CONTINUE

38、 CONTRE DES RISQUES DINCENDIE, REMPLACER SEULEMENT PAR UN FUSIBLE DU MEME TYPE ;Le symbole graphique (Ce symbole signifie fusible de type a fusion rapide.)doit etre interprete comme suit ;1-6 (No.XA011)1.8Important for laser products1.CLASS 1 LASER PRODUCT2.DANGER : Invisible laser radiation when op

39、en and inter lock failed or defeated. Avoid direct exposure to beam.3.CAUTION : There are no serviceable parts inside theLaser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions.4.CAUTION : The compact disc player uses invisible laser radiation and is equippe

40、d with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are de feated. It is dangerous to defeat the safety switches.5.CAUTION : If safety switches malfunction, the laser is able to function.6.CAUTION : Use of controls, adjustments

41、or performance of procedures other than those specified herein may result in hazardous radiation exposure.!Please use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.REPRODUCTION AND POSITION OF LABEL and PRINTWARNING LABEL and PRINTCAUTION: Invisib

42、le laser radiation when open and interlock failed or defeated.AVOID DIRECT EXPOSURE TO BEAM. (e)ADVARSEL: Usynlig laser-strling ved bning, nr sikkerhedsafbrydere er ude af funktion. Undg udst-telse for strling (d)VARNING: Osynlig laser- strlning nr denna del r ppnad och sprren r urkopplad. Betrakta

43、ej strlen. (s)VARO: Avattaessa ja suo-jalukitus ohitettaessa olet alttiina nkymttmlle lasersteilylle. l katso steeseen. (f)CAUTION: Invisible laser radiation when open and interlock failed or defeated.AVOID DIRECT EXPOSURE TO BEAM. (e)ADVARSEL: Usynlig laser-strling ved bning, nr sikkerhedsafbrydere

44、 er ude af funktion. Undg udst-telse for strling (d)VARNING: Osynlig laser- strlning nr denna del r ppnad och sprren r urkopplad. Betrakta ej strlen. (s)VARO: Avattaessa ja suo-jalukitus ohitettaessa olet alttiina nkymttmlle lasersteilylle. l katso steeseen. (f)The inside of a chassis base(No.XA011)

45、1-71.9Precautions for Service1.9.1Handling of Traverse Unit and Laser Pickup(1) Do not touch any peripheral element of the pickup or the actuator.(2) The traverse unit and the pickup are precision devices and therefore must not be subjected to strong shock.(3) Do not use a tester to examine the lase

46、r diode. (The diode can easily be destroyed by the internal power supply of the tester.)(4) To replace the traverse unit, pull out the metal short pin for protection from charging.(5) When replacing the pickup, after mounting a new pickup, remove the solder on the short land which is provided at the

47、 center ofthe flexible wire to open the circuit.(6) Half-fixed resistors for laser power adjustment are adjusted in pairs at shipment to match the characteristics of the optical block.Do not change the setting of these half-fixed resistors for laser power adjustment. 1.9.2Destruction of Traverse Uni

48、t and Laser Pickup by Static ElectricityLaser diodes are easily destroyed by static electricity charged on clothingor the human body. Before repairing peripheral elements of the traverse unit or pickup, be sure to take the following electrostaticprotection:(1) Wear an antistatic wrist wrap.(2) With

49、a conductive sheet or a steel plate on the workbench on which the traverse unit or the pick up is to be repaired, ground thesheet or the plate.(3) Please be sure to make the switch of a relay board into the SHORT side before drawing out a wire from the connector CN101on a servo control board,when ta

50、king out a mechanism assembly from a main body.And please be sure to make a switch into the OPEN side after connecting a wire to CN101, when it mounts a mechanism as-sembly in a main body.(4) After removing the flexible wire from the connector (CN1), short-circuit the flexible wire by the metal clip