Jvc-XVN-512-S-Service-Manual电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2004 Victor Company of Japan, Limited No.YD0282004/9DVD AUDIO/VIDEO PLAYERYD028XV-N512STABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32SPECIFIC SE

2、RVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-73DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74ADJUSTMENT .

3、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-75TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 1

4、-2 (No.YD028)SPECIFICATION Manufactured under license from Dolby Laboratories. Dolby, MLP Lossless, and the double-D symbol are trademarks of Dolby Laboratories.DTS and DTS Digital Surround are registered trademarks of Digital Theater Systems, Inc. This product incorporates copyright protection tech

5、nology that is protected by U.S. patents and other intellectual property rights. Use of this copyrightprotection technology must be authorized by Macrovision, and is intended for home and other limited viewing uses only unless otherwise authorizedby Macrovision. Reverse engineering or disassembly is

6、 prohibited.CONSUMERS SHOULD NOTE THAT NOT ALL HIGH DEFINITION TELEVISION SETS ARE FULLY COMPATIBLE WITH THIS PRODUCT ANDMAY CAUSE ARTIFACTS TO BE DISPLAYED IN THE PICTURE. IN CASE OF 525 OR 625 PROGRESSIVE SCAN PICTURE PROBLEMS, IT ISRECOMMENDED THAT THE USER SWITCH THE CONNECTION TO THE STANDARD D

7、EFINITION OUTPUT. IF THERE ARE QUESTIONS REGARDING OUR TV SET COMPATIBILITY WITH THIS MODEL 525p AND 625p DVD PLAYER, PLEASE CON-TACT OUR CUSTOMER SERVICE CENTER.Digital output signal chartXV-N512S for B,E,EN,EV,EEXV-N512S for UJ XV-N512S for US,UB,UG,UX,UW,UF,UTXV-N512S for AXV-N512S for UPGeneralR

8、eadable discs DVD AUDIO, DVD VIDEO, DVD-R (Video format), DVD-RW (Video format/VR format), DVD-RAM (VR format), SVCD, VideoCD, Audio CD (CD-DA), CD-R/RW (CD-DA, SVCD, Video CD, MP3/WMA format, JPEG)Video format PAL, Interlaced scan/Pro-gressive scan selectableREMOTE, 480i (Interlaced scan)/480p (Pro

9、gressive scan) selectableREMOTE, 525i/625i (Interlaced scan)/525p/625p (Progressive scan) selectableOtherPower requirementsAC 230 V, 50 HzAC 120 V, 60 Hz AC 110 V-240V, 50Hz/60 Hz AC240V,50Hz AC 220 V, 60 HzPower consumption 13 W (POWER ON), 2.0 W (STANDBY mode)Mass 1.9 k gDimensions (W I H I D) 435

10、 mm I 44 mm I 258.6 mmVideo outputsCOMPONENT(pin jacks)Y Output: 1.0 Vp-p (75 )PB/PR Output: 0.7 Vp-p (75 )VIDEO OUT (pin jack) 1.0 Vp-p (75 )S-VIDEO OUT(S jack)Y Output: 1.0 Vp-p (75 )C Output: 286 mVp-p (75 )RGB outpu 700 mVp-p (75 ) -Horizontal resolution 500 lines or moreAudio outputsANALOG OUT

11、(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 characteristicsFrequency response CD (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 and Dolby Digital bits

12、tream signals)DVD (sampling frequency 96 kHz):2 Hz to 44 kHzDVD (sampling frequency 192 kHz/176.4 kHz):2 Hz to 88 kHzDynamic range 16 bit: More than 98 dB20 bit/24 bit: More than 106 dBWow and flutter Unmeasurable (less than +- 0.002%)Total harmonic distortion 16 bit: less than 0.006%20 bit/24 bit:

13、less than 0.005%* Notes for PX model (Check the specification indication on the rear panel.)Power requirements AC 110 V to 240 V , 50 Hz/60 HzPower consumption 13 W (POWER ON), 2.0 W(STANDBY mode)Disc type OutputPCM ONLYDOLBY DIGITAL/PCMSTREAM/PCMDVD with 48/44.1 kHz, 16/20/24 bitlinear PCM DVD AUDI

14、O with MLP 48/44.1 kHz, 16/20/24 bit, stereo linear PCMDVD with 192/176.4/96/88.2 kHz, 16/22/24bit linear PCM DVD AUDIO with MLP 48/44.1 kHz, 16/20/24 bit, stereo linear PCM (Down sampling)DVD with DTS48 kHz, 16 bit, stereo linear PCMDTS bitstreamDVD with Dolby Digital48 kHz, 16 bit, stereo linear P

15、CMDolby Digital bitstreamDVD with MPEG Multichanne 48 kHz, 16 bit, stereo linear PC MPEG bitstreamSVCD/Video CD/Audio C 44.1 kHz, 16 bit, stereo linear PCMAudio CD with DT 44.1 kHz, 16 bit, stereo linear PCMDTS bitstreamCD-R/RW with MP3/WM Linear PCM(No.YD028)1-3SECTION 1PRECAUTION1.1Safety Precauti

16、ons(1)This design of this product contains special hardware andmany circuits 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 t

17、he original circuits. Services should be per-formed by qualified personnel 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 furthe

18、r relieve themanufacture of responsibility for personal injury or propertydamage 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

19、by them necessarily be obtained by us-ing replacement components rated for 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 s

20、chematics and by ( ) onthe Parts List in the Service Manual. The use of 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

21、routed and dressed with ties,clamps, tubings, barriers and the like to 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 shou

22、ld be confirmedthat they have been returned to normal, after reassem-bling.(5)Leakage shock hazard testing)After 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 shaft

23、s, etc.) to be sure the productis safe to operate without danger of electrical shock.Do notuse a line isolation transformer during this check. Plug the AC line cord directly into the AC outlet. Using a“Leakage Current Tester“, measure the leakage currentfrom each exposed metal parts of the cabinet,

24、particular-ly any exposed metal part having a return path to thechassis, 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 ohms per volt or more sensi-tivity

25、in the following manner. Connect a 1,500 ohm 10Wresistor paralleled by a 0.15 F AC-type capacitor be-tween an exposed metal part and a known good earthground.Measure the AC voltage across the resistor with the ACvoltmeter.Move the resistor connection to each exposed metalpart, particularly any expos

26、ed metal part having a returnpath to the chassis, and measure the AC voltage acrossthe 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 desi

27、gned and manufactured tomeet international safety standards.(2)It is the legal responsibility 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

28、approved parts.(5)If mains voltage selector is provided, check setting for localvoltage.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 wi

29、th component parts appearing on the silk-screenprinted side (parts side) of the PWB diagrams, the parts that areprinted over with black such as the resistor ( ), diode ( )and ICP ( ) or identified by the “ mark nearby are critical forsafety. When replacing them, be sure to use the parts of thesame t

30、ype and rating as specified by the manufacturer. (Exceptthe JC version)1-4 (No.YD028)1.5Preventing static electricityElectrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laserdiode in the traverse unit (optical pickup). T

31、ake 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 players. Be careful to use proper grounding in the area where repairs are being performed. (

32、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 anti-static wrist strap to release any static electricity built up in your body. (3)Handling

33、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 parts to their original condition. (Refer to the text.) Do not use a tester to check the conditi

34、on 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 pickup) to strong shocks, as it is a sensitive, complex unit. (2) Cut off the shorted part of

35、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 careful not to take too longa time when attaching it to the connector. (3) Handle the flexib

36、le 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.(No.YD028)1-51.7Important for laser products (1)CLASS 1 LASER PRODUCT(2)DANGER : Invisible laser radiation when open and interlock

37、failed or defeated. Avoid direct exposure to beam.(3)CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace thecomplete Laser Unit if it malfunctions.(4)CAUTION : The compact disc player uses invisible laserradiation and is equipped with safety swi

38、tches which prevent emission of radiation when the drawer is open andthe 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 ableto function.(6)CAUTION : Use of controls, adjustments or performance of

39、procedures other than those specified herein may result inhazardous radiation exposure.CAUTIONPlease use enough caution not to see the beam directlyor touch it in case of anadjustment or operation check.VARNINGOsynlig laserstrlning r denna del r ppnad och sprren rurkopplad. Betrakta ej strlen.VAROAv

40、attaessa ja suojalukitus ohitettaessa olet alttiina nkymt-tmlle lasersteilylle. l katso steeseen.ADVARSELUsynlig laserstrling ved bning, nr sikkerhedsafbrydere erude af funktion. Undg udsasttelse for strling.ADVARSELUsynlig laserstrling ved pning, nr sikkerhetsbryteren er avs-lott. unng utsettelse f

41、or strling. 1-6 (No.YD028)1.8Precautions for Service1.8.1Handling 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

42、 to examine the laser 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

43、is provided at the 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. 1.8.2Destructio

44、n of Traverse Unit and Laser Pickup by Static ElectricityLaser diodes are easily destroyed by static electricity charged on clothingor the human body. Before repairing peripheral elements ofthe traverse unit or pickup, be sure to take the following electrostatic protection:(1)Wear an antistatic wrist wrap.(2)With 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)It solders to two short circuit sections on the substrate of a pick