Jvc-XVN-320-B-Service-Manual电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2005 Victor Company of Japan, LimitedNo.YD0532005/2DVD PLAYERYD05320052XV-N320B,XV-N322STABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32 SPECIFIC

2、 SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-73 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-84 ADJUST

3、MENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-155 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

4、-18Area SuffixUS - U.S.A.UC - CanadaXV-N320BUSC,XV-N320BUCC,XV-N322SUSC,XV-N322SUCCVIDEOOPEN/CLOSELISTSET UPCLEARSLOW + DISPLAY ON SCREENENTERSTANDBY/ONVFPI/PCANCEL RETURNSOUNDEFFECTTITLE/GROUP DIMMERAUDIOSUBTITLEANGLESLIDE EFFECTZOOM1234567890THUMBNAIL/TOPMENUMENUNEXTPREVIOUS SELECT1-2 (No.YD053)SP

5、ECIFICATIONXV-N320B,XV-N322S for US,UCGeneralReadable discs DVD VIDEO, DVD-R (Video format), DVD-RW (Video format), SVCD, Video CD, Audio CD (CD-DA), CD-R/RW (CD-DA, SVCD, Video CD, MP3 format, JPEG) Video format NTSC, 480i/480p selectable OtherPower requirements AC 120 V, 60 HzPower consumption 11.

6、0 W (POWER ON), 1.0 W (STANDBY mode) Mass 1.5 kg (3.3 lbs) Dimensions (W H D) 435mm 44mm 201.5 mm (17-3/16 inch 1-3/4 inc 7-15/16 inch)Video outputsCOMPONENT (pin jacks) Y Output: 1.0 Vp-p (75 )Pb/Pr Output: 0.7Vp-p (75 )VIDEO (pin jack) 1.0 Vp-p (75 )S-VIDEO (S jack) Y Output: 1.0 Vp-p (75 )C Outpu

7、t: 286 mVp-p (75 )Horizontal resolution 500 lines or moreAudio outputsANALOG OUT (pin jack) 2.0 Vrms (10 k)DIGITAL OUT (COAXIAL) 0.5 Vp-p (75 termination)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 k

8、Hz for DTS and Dolby Digital bitstream signals)DVD (sampling frequency 96 kHz):2 Hz to 44 kHzWow and flutter Unmeasurable (less than +- 0.002%)Total harmonic distortion less than 0.009%(No.YD053)1-3SECTION 1PRECAUTION1.1 Safety Precautions(1) This design of this product contains special hardware and

9、many 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 the original circuits. Services should be per-formed by qualifie

10、d 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 further relieve themanufacture of responsibility for personal injury

11、 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 by them necessarily be obtained by us-ing replacement compone

12、nts 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 schematics and by ( ) onthe Parts List in the Service Manual.

13、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 routed and dressed with ties,clamps, tubings, barriers and t

14、he 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 should be confirmedthat they have been returned to normal, after

15、 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 shafts, etc.) to be sure the productis safe to operate without d

16、anger 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, particular-ly any exposed metal part having a return path t

17、o 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 in the following manner. Connect a 1,500 ohm 10Wresistor pa

18、ralleled 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 exposed metal part having a returnpath to the chassis, and meas

19、ure 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.). 1.2 Warning(1) This equipment has been designed and manufactured tomeet international safety standa

20、rds.(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 approved parts.(5) If mains voltage selector is provi

21、ded, check setting for localvoltage.1.3 CautionBurrs 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.1.4 Critical parts for safetyIn regard with component parts appearing on the silk-screenpri

22、nted 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 type and rating as specified by the manufacturer.

23、 (Exceptthe JC version)1-4 (No.YD053)1.5 Preventing 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). Take care to prevent this when performing repair

24、s.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. (1) Ground the workbenchGround the workbench by

25、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 the optical pickup In order to maintain qual

26、ity 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 condition of the laser diode in the optical pickup.

27、 The testers internal power source can easilydestroy the laser diode. 1.6 Handling 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 the flexible cable using nippers, etc. afte

28、r 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 flexible cable carefully as it may break when sub

29、jected to strong force. (4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.1.7 Precautions of the safe use of battery Store the battery in a place where children cannot reach.If a child accidentally swallows the battery, consult a doctorimmediately

30、. Do not recharge, short, disassemble or heat the battery or dispose of it in a fire.Doing any of these things may cause the battery to give off heat, crack, or start a fire. Do not leave the battery with other metallic materials.Doing this may cause the battery to give off heat, crack, or start a f

31、ire. When throwing away or saving the battery, wrap it in tape and insulate; otherwise, the battery may start to give off heat, crack, orstart a fire. Do not poke the battery with tweezers or similar tools.Doing this may cause the battery to give off heat, crack, or start a fire. Dispose of batterie

32、s in the proper manner, according to federal, state, and local regulations.(No.YD053)1-51.8 Importance administering point on the safetyFull Fuse Replacement MarkingGraphic symbol mark (This symbol means fast blow type fuse.)should be read as follows ;FUSE CAUTIONFOR CONTINUED PROTECTION AGAINST RIS

33、KOF FIRE, REPLACE ONLY WITH SAME TYPEAND RATING OF FUSES ;F901 : 1.6 A / 125 V F901 : 1.6 A / 125 VMarquage Pour Le Remplacement Complet De FusiblePRECAUTIONS SUR LES FUSIBLESPOUR UNE PROTECTION CONTINUE CONTRE DES RISQUES DINCENDIE, REMPLACER SEULEMENT PAR UN FUSIBLE DU MEME TYPE ;Le symbole graphi

34、que (Ce symbole signifie fusible de type a fusion rapide.)doit etre interprete comme suit ;B905C706C707C712C713C730B724C901C902C903C904C905C906 C907C908C909C950C954C955C956C957C958C959C964C966C982C983C985 CN901CN902CN903B752CN905B916D902B915D906D951D952D953D954D955D956D957D960EP902FC901FC902IC901IC9

35、02J601J602J703J901L701L702L706L707L709L730L901L951L952L953L954L955L960P901PC901Q951B731B730R901R902R950S501S502S503S504S505S506S507S508B711T901B770B725L970B755B768B757D903C756C755B751B910R963B726B716B754B763B767B750B769B908B753B766B912B746B745B719B758B759B748B903B747B904B913B756B917B901B914B702B919B

36、705B703B740B744B902B765B762B918B715D905B727B717B704B712B743B706B749B722B710B709B718B906B764B761B760CN904B721B720B723B729B742B907B741B708B701B714B713B728B771CP950EP9011-6 (No.YD053)1.9 Precautions for Service1.9.1 Handling of Traverse Unit and Laser Pickup(1) Do not touch any peripheral element of th

37、e 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 laser diode. (The diode can easily be destroyed by the internal power supply of the tester.)(4) To replace the traverse unit,

38、 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 center ofthe flexible wire to open the circuit.(6) Half-fixed resistors for laser power adjustment are adjusted in pairs

39、 at shipment to match the characteristics of the optical block.Do not change the setting of these half-fixed resistors for laser power adjustment. 1.9.2 Destruction of Traverse Unit and Laser Pickup by Static ElectricityLaser diodes are easily destroyed by static electricity charged on clothingor th

40、e 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

41、 thesheet or the plate.(3) It solders to two short circuit sections on the substrate of a pick-up.(4) After removing the flexible wire from the connector (CN101), short-circuit the flexible wire by the metal clip.(5) Short-circuit the laser diode by soldering the land which is provided at the center

42、 of the flexible wire for the pickup. After completing the repair, remove the solder to open the circuit.Short circuit Pick-upGear1CN101 Digital board*Please refer to the disassembly method for details.(No.YD053)1-7SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC

43、SERVICE INSTRUCTIONS.1-8 (No.YD053)SECTION 3DISASSEMBLY3.1 Main body section3.1.1 Removing the top cover (See Figure 1)(1) Remove the two screws A attaching the top cover on bothsides of the main body.(2) Remove the three screws B attaching the top cover on theback of the main body.(3) Raise the bot

44、h sides and lower part of the rear of the topcover, with opening them slightly in an outward direction.And the top cover will be removed.Fig.13.1.2 Removing the front panel assembly (See Figure 2) Prior to performing the following procedure, remove the topcover. There is no need to remove the mechan

45、ism assembly.(1) Hook a and b are removed respectively, and the front panelassembly is removed.Fig.2BBBA x 2TOP COVEROP COVERHook aHook aHook bHook bFront panelassemblyHook b(No.YD053)1-93.1.3 Removing the mechanism assembly (See Figure 3, Figure 4, Figure 5) Prior to performing the following proced

46、ure, remove the topcover. There is no need to remove the front panel assembly.(1) Remove the three screws C attaching the mechanism as-sembly. (2) Remove the mechanism assembly by lifting the rear part ofthe mechanism assembly.(3) Insert a kind of screwdriver in a hole located in the rightside of me

47、chanism assembly, and push a lever until it can-not be inserted any further.(4) A tray is made to slide ahead.(5) A gear 1 is turned counterclockwise. Then, a pick-up unitmoves back.(6) It solders to two c sections on the pick-up unit.(7) Disconnect the card wire from connector CN201, CN202,CN101 on

48、 the digital board.ATTENTION:Please extract the wire after short-circuited of two placeson the pick-up unit in part c with solder. Please removethe solder two places of part c after connecting the wirewith CN101 when reassembling.CAUTION:Be sure to solder the short land sections “c” on the pick-up u

49、nit before disconnecting the card wire from connec-tor CN101 on the digital board.If the card wire is disconnected without attaching solder,the pick-up unit may be destroyed by static electricity. Fig.3Fig.4Fig.5CCCMechanism assemblyFront panel assemblyMechanism assemblyTrayPushPushCN202CN201 CN101 Digital boardPart c Pick-upGear11-10 (No.YD053)3.1.4 Removing the rear panel (See Figure 6 ) Prior to performing the following procedure, remove the topcover.(1) Remove the four screws D a