JVC-HXD7-cs-sm 维修电路原理图.pdf

SERVICE MANUALCOPYRIGHT 2005 Victor Company of Japan, LimitedNo.MB4552005/8COMPACT COMPONENT SYSTEMMB45520058HX-D7Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-43DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-54ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-175TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17CA-HXD7SP-HXD7SP-HXD7Area suffixUJ - U.S.MilitaryRadioFans.CN 收音机爱 好者资料库1-2 (No.MB455)SPECIFICATIONCA-HXD7Speaker section-SP-HXD7Design and specifications are subject to change without notice.Amplifier sectionOutput PowerSUBWOOFER135 W per channel, min. RMS, driven into 6 at 63 Hz with no more than 10% total harmonic distortion. (IEC268-3)MAIN SPEAKER60 W per channel, min. RMS, driven into 4 at 1 kHz with no more than 10% total harmonic distortion. (IEC268-3)Audio input sensitivity/impedanceAUX:400 mV/47 kUSB:USB Version 1.1Digital outputDIGITAL OUTPUT (OPTICAL):-21 dBm to -15 dBm (660 nm 30 nm)VIDEO OUTColor system:NTSCVIDEO (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 Terminals4 - 8 (main speakers)6 - 16 (subwoofers)Tuner sectionFM tuning range87.50 MHz - 108.00 MHzAM tuning range531 kHz - 1 710 kHz (at 9 kHz interval)530 kHz - 1 710 kHz (at 10 kHz interval)Disc player section Playable discDVD Video/DVD AudioCD/VCD/SVCDCD-R/CD-RW (recorded in Audio CD/Video CD/Super Video CD/MP3/JPEG format)DVD-R/DVD-RW (recorded in video format)Dynamic range90 dBHorizontal resolution500 linesWow and flutterImmeasurableGeneralPower requirementAC 110 V - AC 127 V/ AC 220 V - AC 240 V (adjustable with the voltage selector), 50/60 HzPower consumption160 W (at operation)30 W (on standby)Dimensions (approx.)175 mm 373 mm 389 mm (W/H/D)Mass (approx.)10.1 kgType4-Way Front Twin Woofer (Magnetically Shielded Type)SpeakersSubwoofer16 cm cone 1Woofer16 cm cone 1Mid range7 cm cone 1Tweeter2 cm piezo 1Power handling capacitySubwoofer360 (180 + 180) WMain speaker160 (80 + 80) WImpedanceSubwoofer6 Main speaker4 Frequency rangeSubwoofer30 Hz - 1 000 HzMain speaker50 Hz - 20 000 HzSound pressure levelSubwoofer74 dB/WmMain speaker84 dB/WmDimensions (approx.)295 mm 452 mm 390 mm (W/H/D)Mass (approx.)8.9 kg eachRadioFans.CN 收音机爱 好者资料库(No.MB455)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.MB455)SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.(No.MB455)1-5SECTION 3DISASSEMBLY3.1Main body section3.1.1Removing the metal cover (See Figs.1 to 3)(1) From the back side of the main body, remove the fivescrews A attaching the metal cover. (See Fig.1.)(2) From the both sides of the main body, remove the fourscrews A attaching the metal cover. (See Figs.2 and 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.2 and 3.)Fig.1Fig.2Fig.3Metal coverAAAAAMetal coverAAMetal coverAA1-6 (No.MB455)3.1.2Removing the tuner (See Figs.4 and 5) Remove the metal cover.(1) From the left side of the main body, disconnect the cardwire from the connector on the tuner. (See Fig.4.)(2) From the back side of the main body, remove the twoscrews B attaching the tuner to the rear panel. (See Fig.5.)Fig.4Fig.5TunerConnectorRear panelBTuner(No.MB455)1-73.1.3Removing the fan motor (See Figs.6 and 7) Remove the metal cover.(1) From the top side of the main body, disconnect the wirefrom the connector FAN101 on the amplifier board. (SeeFig.6.)(2) From the back side of the main body, remove the twoscrews C attaching the fan motor to the rear panel. (SeeFig.7.)(3) Take out the fan motor from the main body.Fig.6Fig.7Amplifier boardFAN101Fan motor Fan motorCRear panel1-8 (No.MB455)3.1.4Removing the rear panel (See Fig.8) Remove the metal cover.(1) From the back side of the main body, remove the fifteenscrews D and screw E attaching the rear panel.(2) Remove the sections a toward this side and remove therear panel from the sections b.Fig.83.1.5Removing the video board (See Fig.9) Remove the metal cover and rear panel.From the back side of the main body, disconnect the card wirefrom the connector CN101 on the video board.Fig.9Rear panelDDDaabbDECN101Video board(No.MB455)1-93.1.6Removing the fuse board and voltage selector board (See Fig.10) Remove the metal cover and rear panel.From the back side of the main body, disconnect the wires fromthe connectors (DCW06, DCW07) on the fuse board and removethe fuse board with the voltage selector board.Fig.103.1.7Removing the amplifier board (See Fig.11) Remove the metal cover and rear panel.(1) From the top side of the main body, disconnect the wire ofthe fan motor from the connector FAN101 on the amplifierboard.(2) Disconnect the wire from the connector FAN102 on theamplifier board and remove the wire from the slot c.(3) Disconnect the wires from the connectors (AW102,AW105, CW108) on the amplifier board.(4) Disconnect the card wire from the connector AW104 on theamplifier board.(5) Disconnect the card wire from the connector AW101 on theamplifier board and remove the card wire from the slot c.(6) Remove the card wire of the tuner from the slot c.Reference: Remove the tuner as required. When connecting the each wire, pass them throughthe slot c as before.(7) Remove the screw F and take out the amplifier board fromthe main body.Fig.11Fuse boardVoltage selector boardDCW06DCW07Amplifier boardFAN101Card wire (for the tuner)AW101CW108AW102FcFAN102AW104AW1051-10 (No.MB455)3.1.8Removing the power amplifier ICs (See Figs.12 to 14) Remove the metal cover, rear panel and amplifier board.(1) From the forward side of the amplifier board, remove thefour screws G and screw H attaching the power amplifierICs to the heat sink. (See Figs.12 and 13.)(2) From the reverse side of the amplifier board, remove thethree screws J attaching the heat sink. (See Fig.14.)(3) Remove the soldered sections (d, e, f) and remove thepower amplifier ICs from the forward side of the amplifierboard. (See Fig.14.)Fig.12Fig.13Fig.14Amplifier boardGHeat sinkPower amplifier IC (AIC01)Amplifier boardGHHeat sinkPower amplifier IC (PIC02)Power amplifier IC (AIC02)Amplifier boardJdfe(No.MB455)1-113.1.9Removing the 5DVD changer mechanism assembly (See Figs.15 to 19) Remove the metal cover, rear panel, video board and amplifierboard.(1) From the right side of the main body, remove the card wirefrom the sections g of the shield. (See Fig.15.)(2) From the left side of the main body, remove the wire fromthe sections h of the shield. (See Fig.16.)(3) From the both sides of the main body, remove the fourscrews K and remove the shield from the main body. (SeeFigs.15 and 16.)(4) Disconnect the wires from the connectors (DCW02,DCW04, DCW05) on the DVD power board. (See Fig.17.)(5) From the both sides of the main body, remove the fourscrews M and remove the 5DVD changer mechanism as-sembly from the main body in the direction of the arrow.(See Figs.17 and 18.)(6) Disconnect the card wire from the connector CW104 on theforward side of the main board. (See Fig.18.)(7) From the top side of the 5DVD changer mechanism as-sembly, remove the four screws N and remove the base 1and base 2. (See Fig.19.)(8) From the bottom side of the 5DVD changer mechanism as-sembly, disconnect the card wire from the connectorCN701 on the DVD servo control board. (See Fig.19.)Reference:When removing the tray panels, release the claws j of the traypanel and remove the five tray panels from the 5DVD changermechanism assembly. (See Fig.19.)Note:When releasing the claws j, take care not to break them. (SeeFig.19.)Fig.15Fig.16Fig.17ShieldgKShieldKh5DVD changer mechanism assemblyMDCW02DCW04DVD power boardDCW051-12 (No.MB455)Fig.18Fig.195DVD changer mechanism assemblyMCW104Main boardBase 2Base 1NNNN5DVD changer mechanism assemblyTray panelsjCN701DVD servocontrol boardj(No.MB455)1-133.1.10 Removing the DVD power board (See Fig.20) Remove the metal cover, rear panel, video board, amplifierboard and 5DVD changer mechanism assembly.(1) From the back side of the base 2, disconnect the card wiresfrom the connectors (AW103, AW106) on the DVD powerboard.(2) Disconnect the wire from the connector AW104 on theDVD power board.(3) Remove the three screws P attach the DVD power boardon the base 2.Fig.203.1.11 Removing the power transformer (See Fig.21) Remove the metal cover, rear panel, video board, fuse board,voltage selector board, amplifier board and 5DVD changermechanism assembly.(1) Remove the four screws Q attaching the power transformeron the bottom chassis.(2) Take out the power transformer.3.1.12 Removing the main board (See Figs.21 and 22) Remove the metal cover, rear panel, video board, amplifierboard and 5DVD changer mechanism assembly.(1) From the top side of the main body, remove the screw R at-taching the earth wires on the bottom chassis. (SeeFig.21.)(2) Remove the screw S attaching the main board. (SeeFig.22.)(3) Disconnect the connectors (CW101, CW102, CW105) onthe main board from the front panel assembly in the direc-tion of the arrow. (See Fig.22.)Fig.21Fig.22Base 2PAW103AW106AW104DVD power boardPEarth wiresBottom chassisMain boardPower transformerRQQQMain boardCW101CW102CW105Front panel assemblyS1-14 (No.MB455)3.1.13 Removing the front panel assembly (See Figs.21, 23 to 25) Remove the metal cover, rear panel, video board, amplifierboard and 5DVD changer mechanism assembly.(1) From the top side of the main body, remove the screw R at-taching the earth wires on the bottom chassis. (SeeFig.21.)(2) From the both sides of the main body, remove the twoscrews T attaching the front panel assembly. (See Figs.23and 24.)(3) From the both and bottom sides of the main body, releasethe joints (k, m) and remove the front panel assembly fromthe main body in the direction of the arrow. (See Figs.23 to25.)Fig.23Fig.24Fig.25Front panel assemblykTFront panel ass