Jvc-XVN-44-SL-Service-Manual电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LIMITED.No.A00402003/03XV-N40BK,XV-N44SLDVD VIDEO PLAYERA0040200303XV-N40BK,XV-N44SLTABLE OF CONTENTS1 Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2、. . 1-32 Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-73 Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、 . . . . . . . . . . . 1-144 Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23Area Suffix (XV-N40BK)J - U.S.A.C - CanadaArea Suffix (XV-N44SL)J - U.S.A.C - CanadaUJ - U.S.A Militaly258147369010 +

4、10CANCELTITLE/GROUPRETURNVFPPROGRESSIVE SCANREPEATZOOMDIMMERAUDIO3DPHONICSUB TITLEANGLEOPEN/CLOSE DISPLAYNEXTPREVIOUSSELECTCLEARSLOW- SLOW+TOP MENU MENUONSCREENCHOICEENTERSTANDBY/ONVIDEOXV-N40BK,XV-N44SL1-2 (No.A0040)SPECIFICATIONGeneralOtherVideo outputsAudio outputsAudio characteristics Specificat

5、ions and appearance are subject to change without prior notice. Manufactured under license from Dolby Laboratories. “Dolby“ and the double-D symbol are trademarkes of Dolby Laboratories. Manufactured under license from Digital Theater Systems, Inc. “DTS“ and “DTS Digital Surround“ are registered tra

6、demarks of Dig-ital Theater Systems, Inc.Digital output signal chartReadable discs DVD VIDEO, DVD-R (Video format), DVDRW (Video format), +RW (Video format), SVCD, Video CD,Audio CD (CD-DA), MP3 format, JPEG, CD-R/RW (CD-DA, SVCD, Video CD, MP3 format, JPEG) Video format NTSC, 480i (Interlaced scan)

7、/480p (Progressive scan) selectablePower requirements AC 120 V, 60 HzPower consumption 10.4 W (POWER ON) 0.7 W (STANDBY mode) Mass 2.1 kg (4.7 lbs)Dimensions (W x H x D) 435mm x 53mm x 248.4mm (17-3/16 inch x 2-1/8 inc x 9-13/16 inch)COMPONENT (pin jacks) Y Output: 1.0 Vp-p (75 ohm)Pb/Pr Output: 0.7

8、Vp-p (75 ohm)VIDEO OUT (pin jack) 1.0 Vp-p (75 ohm)S-VIDEO OUT (S jack) Y Output: 1.0 Vp-p (75 ohm)C Output: 286 mVp-p (75 ohm)Horizontal resolution 500 lines or moreANALOG OUT (pin jack) 2.0 Vrms (10 kohm)DIGITAL OUT (COAXIAL) 0.5 Vp-p (75 ohm termination)DIGITAL OUT (OPTICAL) -21 dBm to -15 dBm (p

9、eak)Frequency 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 bitstream signals)DVD (sampling frequency 96 kHz):2 Hz to 44 kHzDynamic range 16 bit: More than 98 dB20 bit: More than 100 dB24 bit: More than

10、 100 dBWow and flutter Unmeasurable (less than + 0.002%)Total harmonic distortion less than 0.006%Disc type OutputPCM ONLY DOLBY DIGITAL/PCM STREAM/PCMDVD with 48/44.1 kHz, 16/20/24 bit linear PCM48/44.1 kHz, 16 bit, stereo linear PCMDVD with 96 kHz, 16/22/24 bit linear PCM48kHz, 16 bit, stereo line

11、ar PCM (Down sampling)DVD with DTS No output DTS bitstreamDVD with Dolby Digital 48 kHz, 16 bit, stereo linear PCM Dolby Digital bitstreamDVD with MPEG Multichannel48 kHz, 16 bit, stereo linear PCM MPEG bitstreamSVCD/Video CD/Audio CD 44.1 kHz, 16 bit, stereo linear PCMAudio CD with DTS No output DT

12、S bitstreamCD-R/RW with MP3 Linear PCMXV-N40BK,XV-N44SL(No.A0040)1-3SECTION 1Important Safety Precautions1.1 Safety Precautions(1) This design of this product contains special hardware andmany circuits and components specially for safety purposes.For continued protection, no changes should be made t

13、o theoriginal design unless authorized in writing by the man-ufacturer. Replacement parts must be identical to thoseused in the 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 alterat

14、ions 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 propertydamage resulting therefrom.(3) Many electrical and mechanical parts in the products havespecial safe

15、ty-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 for higher voltage, watt-age, etc. Replacement parts which have these special safetycharacteristics ar

16、e identified in the Parts List of Service Manu-al. Electrical components having such features are iden-tified by shading on the schematics and by ( ) on theParts List in the Service Manual. The use of a substitute re-placement which does not have the same safety character-istics as the recommended r

17、eplacement parts shown in theParts List of Service Manual may create shock, fire, or oth-er hazards.(4) The leads in the products are 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 pre

18、vention 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 reassembling.(5) Leakage shock hazard testing)After reassembling the product, always perform an isolation

19、check on the exposed metal parts of the product (antennaterminals, knobs, metal cabinet, screw heads, headphonejack, control shafts, etc.) to be sure the product is safe tooperate without danger of electrical shock.Do not use a line isolation transformer during this check. Plug the AC line cord dire

20、ctly 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 to thechassis, to a known good earth ground. Any leakage cur-rent must not exceed 0.5mA AC (r.m.s.). Alternate

21、check methodPlug the AC line cord directly into the AC outlet. Use an ACvoltmeter having, 1,000 ohms per volt or more sensitivity inthe following manner. Connect a 1,500 ohm 10W resistorparalleled by a 0.15 F AC-type capacitor between anexposed metal part and a known good earth ground.Measure the AC

22、 voltage across the resistor with the ACvoltmeter. Move the resistor connection to each exposed metal part,particularly any exposed metal part having a return path tothe chassis, and measure the AC voltage across the resistor.Now, reverse the plug in the AC outlet and repeat eachmeasurement. Voltage

23、 measured any must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). 1.2 Warning(1) This equipment has been designed and manufactured tomeet international safety standards.(2) It is the legal responsibility of the repairer to ensure thatthese safety standards are maintained.(3) R

24、epairs 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 localvoltage.1.3 CautionBurrs formed during molding may be left over on some partsof the

25、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-screenprinted side (parts side) of the PWB diagrams, the parts that areprinted over with black such as the resistor ( ),

26、diode ( )and ICP ( ) or identified by the “ “ mark nearby are critical forsafety. When replacing them, be sure to use the parts of the same typeand rating as specified by the manufacturer. (Except the JC version)XV-N40BK,XV-N44SL1-4 (No.A0040)1.5 Preventing static electricityElectrostatic discharge

27、(ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode 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

28、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 laying conductive material (such as a conductive sheet) or an iron plate over it before placi

29、ng 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 quality during transport and before installation, both sides of the laser diode on the replacemen

30、t 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. The testers internal power source can easilydestroy the laser diode. 1.6 Handling the traver

31、se 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. after replacing the optical pickup. For specific details, refer to thereplacement procedure in th

32、e 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 subjected to strong force. (4) I t is not possible to adjust the semi-fixed resistor that adjust

33、s the laser power. Do not turn it.XV-N40BK,XV-N44SL(No.A0040)1-51.7 Importance admistering point on the safety C701 C706 C902 C904 C905 C907 C908 C913 C914 C918 C950 C951 C953 C955 C957 B34 C959 B139 C965 C966 C967 B15 C973 C974 C975 B276 C977 B772 C988 B4 CN904 D901 CP951 D701 D953 CN901 D904 B873

34、B166 C906 EP951 FC901 FC902 IC901 IC952 J702 L709 L710 L901 L951 L952 L954 B116 L955 B532 C976 P704 P901 B304 PC901 Q953 B45 R901 R903 R906 R910 R912 R913 R953 R954 S901 T901 X701 S902 C952 B234 C970 B236 D956 B137 L956 L957 L959 B333 B533 B771 B32 B138 B852 B874 B872 B871 B140 B272 B332 B601 B141 B

35、16 B331 B136 B403 B271 B38 B39 B36 B142 B143 B40 B133 B134 B132 B202 B231 B233 B105 B41 B201 B103 B101 B171 B44 D955 B303 B135 CN902 B273 B631 B37 L953 R966 R951 R915 C808 C802 B2 B237 Q951 B203 B102 C958 D957 D954 D952 D951 D903 D902 B347 EP952 C963 C964 B107 B205 EP953 R969 Full Fuse Replacement M

36、arkingGraphic symbol mark (This symbol means 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 V F901 : 1.6 A / 125 VMarquage Pour Le Remplacement Complet De FusiblePRECAUTIONS

37、SUR LES FUSIBLESPOUR UNE PROTECTION CONTINUE 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 ;XV-N40BK,XV-N44SL1-6 (No.A0040)1.8 Precautions for Service1.8.1 Hand

38、ling 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 laser diode. (The diode can easily be dest

39、royed 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 center ofthe flexible wire to open th

40、e 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. 1.8.2 Destruction of Traverse Unit and Laser Pickup by Static Electric

41、ityLaser 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 a conductive sheet or a steel plate o

42、n the workbench on which the traverse unit or the pick up is to be repaired, ground thesheet or the plate.(3) After removing the flexible wire from the connector (CN101), short-circuit the flexible wire by the metal clip.(4) Short-circuit the laser diode by soldering the land which is provided at th

43、e center of the flexible wire for the pickup. After completing the repair, remove the solder to open the circuit.Short circuitServo control boardShort circuitCN101XV-N40BK,XV-N44SL(No.A0040)1-7SECTION 2Disassembly method2.1 Main body section2.1.1 Removing the top cover (See Figure 1)(1) Remove the t

44、wo 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 both sides and lower part of the rear of the topcover, with opening them slightly in an outward direction.And the top cover will be remove

45、d.Fig.12.1.2 Removing the front panel assembly (See Figure 2, Figure 3, Figure 4) Prior to performing the following procedure, remove the topcover. There is no need to remove the mechanism assembly.(1) Insert a kind of screwdriver in a hole located in the rightside of mechanism assembly, and push a

46、lever until it can-not be inserted any further.(2) And then, a tray will come out. Remove the tray in an upperdirection, with slightly opening the lower part of fitting in anoutward direction.(3) Disconnect the card wire from connector CN901 on thepower supply board.(4) Hook a and b are removed resp

47、ectively, and the front panelassembly is removed.Fig.2Fig.3Fig.4BBBA x 2TOP COVER COVERFront panel assemblyMechanism assemblyTrayFittingHole and leverPushPushCN901Front panel assemblyPower supply boardHook aHook aHook bHook bFront panelassemblyXV-N40BK,XV-N44SL1-8 (No.A0040)2.1.3 Removing the mechan

48、ism assembly (See Figure 2, Figure 5) Prior to performing the following procedure, remove the topcover. There is no need to remove the front panel assembly.(1) Insert a kind of screwdriver in a hole located in the rightside of mechanism assembly, and push a lever until it can-not be inserted any fur

49、ther.(2) And then, a tray will come out. Remove the tray in an upperdirection, with slightly opening the lower part of fitting in anoutward direction.(3) Remove the three screws C attaching the mechanism as-sembly.(4) Disconnect the wire from connector CN501,CN502,CN503on the servo control board respectively.(5) Remove the mechanism assembly by lifting the rear part ofthe mechanism assembly.Fig.52.1.4 Removing the servo control board (S