Jvc-XVM-5-GSL-Service-Manual(1)电路原理图.pdf

SERVICE MANUALCOPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITEDNo.XA0082003/7DVD VIDEO PLAYERXA00820036XV-M5GSLTABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-73 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-84 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-205 TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26Area SuffixJ - U.S.A.C - Canada258147369010 +10TITLE/GROUPTV/VIDEOCANCELRETURNVOL VOL+ CH+CHVFPZOOMAMPVOLAUDIO3DPHONICSUB TITLEANGLEDIMMERREPEATOPEN/CLOSEDISCSELECTTV1 TV2 TV3TV4 TV5 TV6TV7 TV8 TV9TV-/- TV0 MUTINGTV DVDNEXTPREVIOUSSELECTCLEARSLOW- SLOW+TOPMENU MENUONSCREENCHOICEENTERSTANDBY/ONTV DVDPROGRESSIVE SCANVIDEO1-2 (No.XA008)SPECIFICATIONGeneralOtherVideo outputsAudio outputsAudio characteristics Specifications 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. “DTS“ and “DTS Digital Out“ are trademarks of Digital 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/WMA format, JPEG, CD-R/RW (CD-DA, SVCD, Video CD, MP3/WMA format,JPEG) Video format NTSC, 480i (Interlaced scan)/480p (Progressive scan) selectablePower requirements AC 120 V, 60 HzPower consumption 12 W (POWER ON) 0.8 W (STANDBY mode) Mass 4.2 kg (9.3 lbs)Dimensions (W x H x D) 435mm x 83mm x 322mm (17-3/16 inch x 3-5/16 inc x 12-11/16 inch)COMPONENT (pin jacks) Y Output: 1.0 Vp-p (75 ohm)Pb/Pr Output: 0.7Vp-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 (peak)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 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 linear PCM (Down sampling)DVD with DTS 48kHz, 16bit, stereo linear PCM DTS bitstreamDVD with Dolby Digital 48 kHz, 16 bit, stereo linear PCM Dolby Digital bitstreamDVD with MPEG Multichannel48kHz, 16 bit, stereo linear PCM MPEG bitstreamSVCD/Video CD/Audio CD 44.1 kHz, 16 bit, stereo linear PCMAudio CD with DTS 48kHz, 16bit, stereo linear PCM DTS bitstreamCD-R/RW with MP3/WMA Linear PCM(No.XA008)1-3SECTION 1PRECAUTION1.1 Safety Precautions(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 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 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 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 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 schematics 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 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 should 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 shafts, 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, 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 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 exposed 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.). 1.2 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) 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 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-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 type and rating as specified by the manufacturer. (Exceptthe JC version)1-4 (No.XA008)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 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. (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 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 condition of the laser diode in the optical pickup. The tester's 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. 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 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.(No.XA008)1-51.7 Importance admistering point on the safety JT901 JT902 JT903 JT904 B922 EP952 C902 C904 C905 C907 C908 C913 C914 C918 C950 C951 C952 C953 C955 C957 C958 C959 C963 C964 C965 C966 C967 C970 C973 C988 CP951 C916 D901 D902 D903 D951 D952 D953 D954 D955 D956 D957 D960 EP951 FC901 FC902 B910 B920 IC901 IC952 B911 B912 L901 L951 L952 L953 L954 L955 P901 PC901 B913 B914 B902 B907 Q951 Q953 B909 B906 B908 B921 B918 B919 WC901 B915 B916 B917 B923 B926 B927 B925 B924 R901 R903 R906 R910 R912 R913 R915 R951 R954 T901 EP910 D904 B903 B904 B905 Full Fuse Replacement MarkingGraphic 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 SUR LES FUSIBLESPOUR UNE PROTECTION CONTINUE CONTRE DES RISQUES D'INCENDIE, 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.XA008)1.8 Precautions for Service1.8.1 Handling 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 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 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. 1.8.2 Destruction 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) 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 the center of the flexible wire for the pickup. After completing the repair, remove the solder to open the circuit.CN101Servo control boardShort circuitShort circuit*Please refer to the disassembly method for detailes.(No.XA008)1-7SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.1-8 (No.XA008)SECTION 3DISASSEMBLY3.1 Main body section3.1.1 Removing the top cover (See Figure 1)(1) Remove the four screws A attaching the top cover on bothsides of the main body.(2) Remove the two 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 removed.Fig.13.1.2 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) Disconnect the flat wire from connector JT901, JT902 onthe power supply board.(2) Disconnect the card wire from connector CN501, CN702on the servo control board and signal output terminal boardrespectively.(3) Remove the three screws C attaching the front panel as-sembly on the bottom of the main body.(4) Hook a and b are removed respectively, and the front panelassembly is removed.3.1.3 Removing the changer mechanism assembly (See Figure 2, Figure 4) Prior to performing the following procedure, remove the topcover. There is no need to remove the front panel assembly.(1) Disconnect the card wire from connector CN501, CN502,CN503 on the servo control board.(2) Remove the four screws D attaching the changer mecha-nism assembly.Fig.2Fig.3Fig.4BBA x 2A x 2TOP COVERP COVERPower supply boardJT901,JT902DSignal output terminal boardCN702DD DHook aHook aHook bHook bFront panelassemblyCCCMechanism assembly Servo control boardCN502CN501 CN503(No.XA008)1-93.1.4 Removing the servo control board (See Figure 5) Prior to performing the following procedure, remove the chang-er mechanism assembly.(1) Disconnect the card wire from connector CN101, CN103,CN104, CN105, CN201 on the servo control board.ATTENTION :At this time, please extract the wire after short-circuitedof two places on the wire in part c with solder. Please re-move the solder two places of part c after connecting thewire CN101 when reassembling.(2) Remove the two screws E attaching the servo controlboard.Fig.53.1.5 Removing the power supply board (See Figure 6, Figure 7) Prior to performing the following procedure, remove the topcover.(1) Disconnect the flat