JVC-MXJD5-cs-sm 维修电路原理图.pdf

SERVICE MANUALCOPYRIGHT 2004 Victor Company of Japan, LimitedNo.MB2632004/6COMPACT COMPONENT SYSTEMMB26320046MX-JD5TABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-63DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-335TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-40Area suffixUS - SingaporeUW - Brazil,Mexico,PeruUX - Saudi ArabiaUE -Turkey UN - AseanCA-MXJD5RadioFans.CN 收音机爱 好者资料库1-2 (No.MB263)SPECIFICATIONDesign and specifications are subject to change without notice.Amplifier sectionOutput PowerFRONT MAIN SPEAKERS40 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 10% total harmonic distortion.FRONT SUBWOOFERS80 W per channel, min. RMS, driven into 6 at 63 Hz with no more than 10% total harmonic distortion.CENTER SPEAKER40 W, min. RMS, driven into 8 at 1 kHz with no more than 10% total harmonic distortion.SURROUND SPEAKERS25 W per channel, min. RMS, driven into 16 at 1 kHz with no more than 10% total harmonic distortion.Digital outputOPTICAL DIGITAL OUTPUT -21 dBm to -15 dBm (660 nm 30 nm)Audio input sensitivity/Impedance(Measured at 1 kHz, with tape recording signal 300 mV)AUX IN300 mV/47 kMIC 1/23.0 mV/50 kVIDEO OUTColor systemNTSC/PAL selectableVIDEO (composite)1 V(p-p)/75 S-VIDEOY (luminance):1 V(p-p)/75 C (chrominance, burst):0.286 V(p-p)/75 COMPONENT (Interlace/Progressive)(Y):1 V(p-p)/75 (PB/PR):0.7 V(p-p)/75 Speaker TerminalsFront main speakers6 - 16 Center speakers8 - 16 Surround speakers16 - 32 6 - 16 (Front subwoofers) 6 - 16 OthersAV COMPU LINK 2 ( 3.5)Tuner sectionFM tuning range87.50 MHz - 108.00 MHzAM (MW) tuning range531 kHz - 1 710 kHz (at 9 kHz)530 kHz - 1 710 kHz (at 10 kHz)Disc player sectionPlayable discDVD Video/DVD Audio/CD/VCD/SVCDCD-R/CD-RW (recorded in Audio CD/ Video CD/ Super Video CD/ MP3/ WMA/ JPEG/MPEG-4 format)DVD-R/DVD-RW (recorded in video format)Dynamic range90 dBHorizontal resolution500 linesWow and flutterImmeasurableCassette deck sectionFrequency response Normal (type I)50 Hz - 14 000 HzWow and flutter0.15% (WRMS)GeneralPower requirementAC 110 V / AC 127 V / AC 220 V / AC 230 V - AC 240 V ,(adjustable with the voltage selector), 50 Hz / 60 HzPower consumption220 W (at operation) 20 W (on standby)Dimensions (approx.)265 mm 335 mm 352 mm (W/H/D)Mass (approx.)8.7 kgRadioFans.CN 收音机爱 好者资料库(No.MB263)1-3SECTION 1PRECAUTION1.1Safety 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 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 electrical 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, 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-type 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 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 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.1.3CautionBurrs 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 the 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 Except 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.MB263)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). 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 laser products. 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 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 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 long atime 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.1.7Attention when traverse unit is decomposed*Please refer to Disassembly method in the text for the pickup unit. Apply solder to the short land sections before the flexible wire is disconnected from the connecto on the servo board. (If the flexiblewire is disconnected without applying solder, the pickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land sections after connecting the flexible wire.1MConductive material(conductive sheet) or iron palate(caption)Anti-static wrist strapTraverse mechanism assemblyPickupShort land sectionCard wireConnector(No.MB263)1-51.8Important for laser products1.CLASS 1 LASER PRODUCT2.DANGER : Invisible laser radiation when open 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 CD,MD and DVD player uses invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are defeated. 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 or performance of procedures other than those specified here in may result in hazardous radiation exposure.REPRODUCTION AND POSITION OF LABELSCAUTION : Visible and Invisible laser radiation when open and interlock failed or defeated.AVOID DIRECT EXPOSURE TO BEAM. (e)VARNING : Synlig ochosynling laserstrlning nr den ppnas och sprren rurkopplad. Betrakta ejstrlen. (s)VARO : Avattaessa ja suojalukitusohitettuna tai viallisena olet alttiina nkyvlle ja nkymttmllelasersteilylle. Vlt steenkohdistumista suoraan itseesi. (f)ADVARSEL : Synlig og usynliglaserstrling nr maskinen erben eller interlocken fejeler.Undg direkte eksponering til strling. (d)!Please use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.CLASS 1LASER PRODUCTCAUTION : Visible and Invisible laser radiation when open and interlock failed or defeated.AVOID DIRECT EXPOSURE TO BEAM. (e)VARNING : Synlig ochosynling laserstrlning nr den ppnas och sprren rurkopplad. Betrakta ejstrlen. (s)VARO : Avattaessa ja suojalukitusohitettuna tai viallisena olet alttiina nkyvlle ja nkymttmllelasersteilylle. Vlt steenkohdistumista suoraan itseesi. (f)ADVARSEL : Synlig og usynliglaserstrling nr maskinen erben eller interlocken fejeler.Undg direkte eksponering til strling. (d)WARNING LABEL1-6 (No.MB263)SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.(No.MB263)1-7SECTION 3DISASSEMBLY3.1Main body section3.1.1Removing the metal cover (See Figs.1 to 3)(1) From the both sides of the main body, remove the twoscrews A attaching the metal cover. (See Figs.1 and 2.)(2) From the back side of the main body, remove the sixscrews B attaching the metal cover. (See Fig.3.)(3) Remove the metal cover from the main body while liftingthe rear section of the metal cover in the direction of the ar-row. (See Figs.1 and 2.)Fig.1Fig.2Fig.3Metal coverAMetal coverAMetal coverBBB1-8 (No.MB263)3.1.2Removing the front panel assembly (See Figs.4 to 7) Prior to performing the following procedures, remove the metalcover.(1) From the right side of the main body, remove the screw Cattaching the earth wires on the reverse side of the mainboard. (See Fig.4.)Reference:After attaching the earth wires, fix them with a spacer asbefore. (See Fig.4.) (2) Remove the plastic rivet attaching the main board. (SeeFig.4.)(3) From the inside of the main body, disconnect the card wiresfrom the connectors (CN303, CN860, CN880) on the for-ward side of the main board. (See Fig.4.)(4) Remove the wire clamp fixing the wires and disconnect thewires from the connectors (CN301, CN302) on the forwardside of the main board. (See Fig.5.)Reference:After connecting the wires to the connectors, fix the wireswith the wire clamp as before. (See Fig.5.)(5) Disconnect the wire from the connector CN454 on the for-ward side of the main board. (See Fig.5.) UW/UE versiononly(6) From the left side of the main body, disconnect the parallelwire from the connector CN101 on the transformer board.(See Fig.5.)(7) Disconnect the wire from the connector CN119 on thetransformer board. (See Fig.5.)Reference:After connecting the wire, pass the wire through the slota of the holder board as before. (See Fig.5.)(8) Remove the tie band fixing the wire and disconnect thewire from the connector CN106 on the speaker terminalboard. (See Fig.5.)Reference: After connecting the wire, fix the wire with a new tieband as before. (See Fig.5.) After connecting the wire, pass the wire through theslot a of the holder board as before. (See Fig.5.)(9) From the top side of the main body, remove the two screwsD attach the front panel assembly to the main body. (SeeFig.6.)(10) From the bottom side of the main body, remove the threescrews E and two screws F attaching the front panel as-sembly. (See Fig.7.)(11) Release the claws b, remove the front panel assemblyfrom the main body in the direction of the arrow. (SeeFig.7.)Fig.4Fig.5Main boardEarth wiresSpacerCN303CN860Plastic rivetCN880CCN301CN101CN119Tie bandTransformer boardSpeaker terminal boardCN106Parallel wireaCN302wiresWire clampMain boardParallelwireWireHolder boardCN454Wire(No.MB263)1-9Fig.6Fig.7Front panel assemblyDDFront panel assemblyEFbbE1-10 (No.MB263)3.1.3Removing the tuner (See Figs.8 and 9.) Prior to performing the following procedures, remove the metalcover.(1) From the top side of the main