JVC-HXZ9V-cs-sm 维修电路原理图.pdf

SERVICE MANUALCOPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LIMITEDNo.220412003/5COMPACT COMPONENT SYSTEM2204120036HX-Z9VTABLE OF CONTENTS1Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-53Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-344Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-40VCDNUMBERVOLUMEPRESETSOUNDMODECOMPACTDIGITAL VIDEOSELECTCA-HXZ9VCOMPACTDIGITAL VIDEOUS - SingaporeArea SuffixRadioFans.CN 收音机爱 好者资料库1-2 (No.22041)SPECIFICATIONDesign and specifications are subject to change without notice.Amplifier sectionOutput Power (IEC 268-3)SUBWOOFERS75 W per channel, min. RMS, both channels driven into 6 at 63 Hz with no more than 0.9% total harmonic distortion.MAIN SPEAKERS30 W per channel, min. RMS, both channels driven into 6 at 1 kHz with no more than 0.9% total harmonic distortion.Audio input sensitivity/Impedance(Measured at 1 kHz, with tape recording signal 300 mV)AUX390 mV/50 kMIX 1/21.5 mV/5 kSpeakers/ImpedanceSUBWOOFERS6 - 16 MAIN SPEAKERS6 - 16 SURROUND SPEAKERS16 - 32 TunerFM tuning range87.50 MHz - 108.00 MHzAM tuning rangeAt 9 kHz intervals 531 kHz - 1 710 kHzAt 10 kHz intervals 530 kHz - 1 710 kHzCD playerCD capacity3 CDsDynamic range85 dBSignal-to-noise ratio90 dBWow and flutterImmeasurableMP3 recording formatMPEG 1/2 Audio Layer 3Max. Bit rate320 kbpsCassette deckFrequency responseNormal (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 consumption205 W (in operation) 23 W (on standby with Ecology Mode off)Less than 3.5 W (on standby with Ecology Mode on)Dimensions (approx.)205 mm 370 mm 370 mm (W/H/D)Mass (approx.)10.0 kgRadioFans.CN 收音机爱 好者资料库(No.22041)1-3SECTION 1Precautions1.1Safety 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.22041)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 CD 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 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 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.1.7Attention when traverse unit is decomposed*Please refer to Disassembly method in the text for the CD pickup unit. Apply solder to the short land sections before the flexible wire is disconnected from the connector CN101 on the CD servo board.(If the flexible wire is disconnected without applying solder, the CD 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 strapSolderingFig.1Fig.2CD traverse mechanism unitFlexible cable(No.22041)1-5SECTION 2Disassembly method2.1Main body2.1.1Removing the metal cover (See Fig.13)(1) Remove the six screws A on the back of the body.(2) Remove the screw B on each side of the body.(3) Remove the metal cover from the body by lifting the rearpart of the cover.CAUTION:Do not break the front panel tab fitted to the metal cover.Fig.1Fig.2Fig.3A BMetal coverMetal coverB1-6 (No.22041)2.1.2Removing the CD changer mechanism assembly (See Fig.4, 5) Prior to performing the following procedure, remove the metalcover.(1) Disconnect the card wires from connector CN151 andCN651 on the CD servo control board on the right bottomof the CD changer mechanism assembly.(2) Remove the four screws C attaching the CD changermechanism assembly on top of the body.(3) Remove the CD changer mechanism assembly while liftingthe rear part.CAUTION:Do not damage the CD fitting when removing the CD changermechanism assembly.Fig.4Fig.5CD changer mechanism assemblyFront panel assemblyCD servo control boardCN651CN151CCCD changer mechanism assembly(No.22041)1-72.1.3Removing the front panel assembly (See Fig.69) Prior to performing the following procedure, remove the metalcover and the CD changer mechanism assembly.(1) Disconnect the card wires from connector CN44 andCN870, disconnect the flat wire from connector CN922 onthe main board on the right side of the body. Remove thescrew D attaching the wire from extending from the under-side of the front panel assembly.(2) Disconnect the wire from connector CN701 on the bridgeboard.(3) Cut the band.(4) Disconnect the wires from connector CN231 and CN232on the primary board on the left side of the body.(5) Remove the plastic rivet attaching the inner bar in the cen-ter of the front panel assembly.REFERENCE:Keep the plastic rivet for reuse.(6) Remove the three screws E attaching the front panel as-sembly at the bottom of the body.(7) Disconnect the ground wire extending from the phoneboard from bottom chassis.(8) Release the two joints a on the lower left and right sides ofthe front panel assembly using a screwdriver, and removethe front panel assembly toward the front.REFERENCE:Front panel need to be tilt little bit as release from bottomchassis.Fig.6Fig.7Fig.8Fig.9Main boardCN870CN922CN44Front panel assemblyDJoint aBridge boardCN701Joint aBottom chassisGround wirePrimary boardCN231,CN232BandBridge boardCN701Inner barPlastic rivetFront panel assemblyE1-8 (No.22041)2.1.4Removing the antenna board (See Fig.10, 11) Prior to performing the following procedure, remove the metalcover.(1) Disconnect the card wire from connector CN1 on the an-tenna board on the right side of the body.(2) Remove the band attaching the antenna board.(3) Remove the two screws F on the rear panel on the back ofthe body.Fig.10Fig.11Antenna boardCN1BandRear panelFRear panel(No.22041)1-92.1.5Removing the rear panel (See Fig.1216) Prior to performing the following procedure, remove the metalcover and the CD changer mechanism assembly.(1) Remove holding board by remove two plastic rivets andthen slide out the holding board as shown in fig.12.(2) Disconnect fan wire from connector CN206 on the bridgeboard.(3) Disconnect the flat wire from connector CN91 on the sur-round speakers jack board.(4) Cut off the band that fixing fan wire on inner bar.(5) Remove ten screws G from rear panel.(6) Detach joint b to release rear panel from inner bar.(7) Release joints c which on right bottom and left bottom ofrear panel. The joint can be release by pull outward theside of rear panel.REFERENCE:Fan assembly and surround speaker jack board will come offwith rear panel.Fig.12Fig.13Fig.14Fig.15Fig.16Holding boardPlastic rivetsInner barRear panelInner barBandBridge boardCN206Joint bSurround speakersjack boardCN91GGGGRear panelJoint cRear panelJoint cRear panel1-10 (No.22041)2.1.6Removing the T.flux board (See Fig.17, 18) Prior to performing the following procedure, remove the metalcover and the CD changer mechanism assembly .(1) Disconnect the card wire from connector CN102 on theT.flux board.(2) Remove the two plastic rivets attaching the T.flux board.(3) Remove the T.flux board from the bracket which is locatedon the inner bar. (two joints d)Fig.17Fig.18T.flux boardFront panel assemblyInner barPlastic rivetPlastic rivetdT.flux board CN102(No.22041)1-112.1.7Removing the fan assembly (See Fig.19, 20) Prior to performing the following procedure, remove the metalcover, the CD changer mechanism assembly and the rear pan-el.(1) Remove two screws H on the rear panel.(2) Rotate fan assembly in clockwise direction to release fanassembly from rear panel (joints e).Fig.19Fig.202.1.8Removing the main board (See Fig.21) Prior to performing the following procedure, remove the metalcover, the CD changer mechanism assembly, the antennaboard and the rear panel.(1) Disconnect the card wires from connector CN44, CN504and CN870 on the main board.(2) Disconnect the flat wire from connector CN922 on the mainboard.(3) Remove the screw D attaching the main board.(4) Disconnect connector CN217 and CN311 on the mainboard outward and release from the base chassis (joint f)upward.Fig.21HRear paneleeFan assemblyMain boardCN870CN922CN44CN311CN504CN217fD1-12 (No.22041)2.1.9Removing the bridge board / regulator board / heat sink (See Fig.2227) Prior to performing the following procedure, remove the metalcover, the CD changer mechanism assembly, the rear panel,the antenna board and main board.(1) Remove the plastic rivet attaching the stay inner bar andremove the screw I on the bridge board.(2) Move the inner bar forward and upward to release from thefront section (joint g) and from the bridge board (two jointsh) respectively.(3) Disconnect the wires from connector CN212, CN213 andCN214 on the primary board respectively and remove theband fixi