JVC-DXJ21-cs-sm 维修电路原理图.pdf

SERVICE MANUALCOPYRIGHT 2009 Victor Company of Japan, LimitedNo.MB6662009/2COMPACT COMPONENT SYSTEMMB66620092 SERVICE MANUALDX-J36UN, DX-J36EE, DX-J36UX, DX-J36UG, DX-J36US,DX-J36UW, DX-J21UN, DX-J21J, DX-J21EE, DX-J21A,DX-J21UW, DX-J21UX,DX-J21UG, DX-J11UN, DX-J11EE,DX-J11UW, DX-J11UX, DX-J11UG, DX-J11UH, DX-J11USCOPYRIGHT 2009 Victor Company of Japan, LimitedLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)Lead free solder used in the board (material : Sn-Cu, melting point : 230 Centigrade)TABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-42SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-73DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-295TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31SUPER VIDEODX-J11SP-DXJ11CA-DXJ11SP-DXJ11DX-J21SP-DXJ21W SP-DXJ21FCA-DXJ21SP-DXJ21FDX-J36SP-DXJ36FSP-DXJ36FSP-DXJ36CCA-DXJ36SP-DXJ36SSP-DXJ36SRadioFans.CN 收音机爱 好者资料库1-2 (No.MB666)SPECIFICATIONDX-J21/DX-J11Design and specifications are subject to change without notice.Amplifier sectionOutput Power FRONT SPEAKERS (DX-J21)120 W per channel min. RMS driven into 6 at 1 kHz with no more than 10% total harmonic distortion.(DX-J11)125 W per channel min. RMS driven into 6 at 1 kHz with no more than 10% total harmonic distortion.SUBWOOFERS (DX-J21)120 W min. RMS driven into 6 at 63 Hz with no more than 10% total harmonic distortion.Digital output OPTICAL DIGITAL OUTPUT -21 dBm to -15 dBm (660 nm 30 nm)Digital input USB MEMORYAudio input sensitivity/ImpedanceMeasured at 1 kHz with tape recording signal 300 mVAUX 400 mV/47 kMIC1/2 3.0 mV/50 kVIDEO OUT Color system NTSC/PALVIDEO (composite) S-VIDEO Y (luminance)1 V(p-p)/75 C (chrominance, burst)1 V(p-p)/75 NTSC0.286 V(p-p)/75PAL0.3 V(p-p)/75Speaker Terminals 6 - 16 (front speakers/subwoofers)Tuner sectionFM tuning range 87.50 MHz - 108.00 MHzAM (MW) tuning range 531 kHz - 1 710 kHz (at 9 kHz)530 kHz - 1 710 kHz (at 10 kHz)For Saudi Arabia 531 kHz - 1 602 kHz (at 9 kHz)530 kHz - 1 600 kHz (at 10 kHz)For Russia522 Khz - 1 629KhzDisc/File player sectionRegion codesMiddle East 2South East Asia 3Central and South America, Australia 4Playable disc DVD Video/CD/VCD/SVCD/CD-R/CD-RW (MP3/WMA/WAV/JPEG/MPEG-1/MPEG-2/ASF/DivX format)DVD-R/-RW (DVD-VR/DVD-video/MP3/WMA/WAV/JPEG/MPEG-1/MPEG-2/ASF/DivX format)DVD-ROM (DVD-video/MP3/WMA/WAV/JPEG/MPEG-1/MPEG-2/ASF/DivX format)Playable file MP3/WMA/WAV/JPEG/MPEG-1/MPEG-2/ASF/DivX formatDynamic range 80 dBHorizontal resolution 500 linesWow and flutter ImmeasurableUSB storage sectionUSB specification Compatible with USB 2.0 Full SpeedCompatible device Mass storage classCompatible file system FAT 16, FAT 32Bus power supply 5 V/500 mACassette deck sectionFrequency response Normal (type I) 50 Hz - 14 000 HzWow and flutter 0.15% (WRMS)GeneralPower requirement AC 110 V / AC 127 V / AC 220 V / AC 230 V AC 240 V (adjustable with the voltage selector) 50 Hz / 60 HzFor Australia AC 240 V , 50 HzFor RussiaAC 230 V , 50 HzPower consumption DX-J11UN95 W (at operation) / 15 W (on standby)DX-J21UN140 W (at operation) / 16 W (on standbyDimensions(W/H/D) (approx.) 185 mm x 370 mm x 372 mmMass (approx.)DX-J11UN8.9 kgDX-J21UN9.3 kgRadioFans.CN 收音机爱 好者资料库(No.MB666)1-3DX-J36Design and specifications are subject to change without notice.Amplifier sectionOutput Power FRONT SPEAKERS 125 W per channel min. RMS driven into 6 at 1 kHz with no more than 10% total harmonic distortion.SURROUND SPEAKERS 50 W per channel min. RMS driven into 6 at 1 kHz with no more than 10% total harmonic distortion.CENTER SPEAKER 50 W min. RMS driven into 6 at 1 kHz with no more than 10% total harmonic distortion.Audio output SUBWOOFER OUTDigital input USB memoryAudio input sensitivity/ImpedanceMeasured at 1 kHz with tape recording signal 300 mVAUX 400 mV/47 kMIC1/2 3.0 mV/50 kVIDEO OUT Color system NTSC/NTSC PROG/PAL/PAL PROGVIDEO (composite) S-VIDEO Y (luminance)1 V(p-p)/75C (chrominance, burst)1 V(p-p)/75NTSC0.286 V(p-p)/75PAL0.3 V(p-p)/75COMPONENT (Interlace/Progressive) (Y)1 V(p-p)/75(PB/PR)0.7 V(p-p)/75Speaker Terminals 6 - 16 (front/surround/center)Tuner sectionFM tuning range 87.50 MHz - 108.00 MHzAM (MW) tuning range 531 kHz - 1 710 kHz (at 9 kHz)530 kHz - 1 710 kHz (at 10 kHz)For Saudi Arabia 531 kHz - 1 602 kHz (at 9 kHz)530 kHz - 1 600 kHz (at 10 kHz)For Russia522 kHz - 1 629 kHz Disc/File player sectionRegion codes Middle East 2South East Asia 3Central and south America, Australia 4Playable disc DVD Video/DVD Audio/CD/VCD/SVCDCD-R/CD-RW (CD/VCD/SVCD/MP3/WMA/WAV/JPEG/MPEG-1/MPEG-2/ASF/DivX format)DVD-R/-RW (DVD-VR/DVD-video/MP3/WMA/WAV/JPEG/MPEG-1/MPEG-2/ASF/DivX format)DVD-ROM (DVD-video/MP3/WMA/WAV/JPEG/MPEG-1/MPEG-2/ASF/DivX format)Playable file MP3/WMA/WAV/JPEG/MPEG-1/MPEG-2/ASF/DivX formatDynamic range 80 dBHorizontal resolution 500 linesWow and flutter ImmeasurableUSB storage sectionUSB specification Compatible with USB 2.0 Full-SpeedCompatible device Mass storage classCompatible file system FAT 16, FAT 32Bus power supply 5 V/500 mACassette deck sectionFrequency response Normal (type I) 50 Hz - 14 000 HzWow and flutter 0.15% (WRMS)GeneralPower requirement AC 110 V / AC 127 V / AC 220 V / AC 230 V - AC 240 V (adjustable with the voltage selector) 50 Hz / 60 HzFor Australian model AC 240 V , 50 HzFor RussiaAC 230 V , 50 HzPower consumption 205 W (at operation) / 21 W (on standby)Dimensions (W/H/D) (approx.) 185 mm x 370 mm x 372 mmMass (approx.) 9.5 kg1-4 (No.MB666)SECTION 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 TYPE(No.MB666)1-51.5Preventing 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 card wire is disconnected from the connecto on the servo board. (If the card wireis 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 card wire.1MConductive material(conductive sheet) or iron palate(caption)Anti-static wrist strapSolder short land section1-6 (No.MB666)1.8Important for laser products1.CLASS 1 LASER PRODUCT 2.CAUTION : (For U.S.A.) Visible and/or invisible class II laser radiation when open. Do not stare into beam. (Others) Visible and/or invisible class 1M laser radiation when open. Do not view directly with optical instruments. 3.CAUTION : Visible and/or invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam.4.CAUTION : This laser product uses visible and/or 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 LABELS and PRINT!Please use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck. WARNING LABEL and PRINT(No.MB666)1-7SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.SECTION 3DISASSEMBLY3.1Main body (Used figure are DX-J11)3.1.1Removing the Metal cover (See Fig.1, 2)(1) Remove the four screws A attaching the both side of theMetal Cover. (See Fig.1)(2) Remove the two screws B attaching the Rear cover. (SeeFig.2)(3) Remove the seven screws C attaching the Metal cover.(See Fig.2)Fig.1Fig.2ACCCCBCCC1-8 (No.MB666)3.1.2Removing the DVD mechanism (See Fig.3 to 5)(1) Disconnect the card wire from Micom board connected toconnector CN701 and CN801 of the Front end board. (SeeFig.3)(2) Disconnect the card wire from Amp board connected toconnector CN702 of the Front end board. (See Fig.3)(3) Remove the two screws D attaching the DVD mechanism.(See Fig.4)(4) Disconnect the connector wire from USB jack board con-nected to connector CN811 of the Front end board. (SeeFig.5)Fig.3Fig.4Fig.5CN701CN702CN801DDC