JVC-CAMXKC68-cs-sm 维修电路原理图.pdf

SERVICE MANUALCOPYRIGHT 2008 Victor Company of Japan, LimitedNo.MB6642008/8COMPACT COMPONENT SYSTEMMB66420088 SERVICE MANUALMX-KC68J, MX-KC68C, MX-KC68B, MX-KC68E, MX-KC68EN, MX-KC68EV, MX-KC68A, MX-KC68UJ, MX-KC68UW, MX-KC38J, MX-KC38CCOPYRIGHT 2008 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-52SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-83DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-84ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-205TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21SP-MXKC38SP-MXKC68FSP-MXKC38SP-MXKC68FSP-MXKC68WCA-MXKC38CA-MXKC68(MX-KC68B,E,EN,EV)RadioFans.CN 收音机爱 好者资料库1-2 (No.MB664)SPECIFICATIONMX-KC68J/C/MX-KC38J/CSpecifications and appearance are subject to change without prior notice.Amplifier section OUTPUT POWER Main speakers110 W per channel min. RMS driven into 3 at 1 kHz with no more than 10% total harmonic distortionSpeakers/Impedance 3 - 6 Subwoofer (for MX-KC68)180 W per channel min. RMS driven into 8 at 63 Hz with no more than 10% total harmonic distortionSpeakers/Impedance 8 - 16 Tuner sectionFM tuning range 87.5 MHz - 108.0 MHzAM tuning range 530 kHz - 1 710 kHzCD player sectionDynamic range 90 dBSignal-to-noise ratio 85 dBWow and flutter ImmeasurableMain speakers (MX-KC68/SP-MXKC38)Type 3-Way 3-Speaker Bass-Reflex TypeSpeaker unitsMain Woofer 16 cm (6-5/16 inches) cone x 1Mid Range 5 cm (2 inches) cone x 1Tweeter 2 cm (13/16 inches) dome x 1Power Handling Capacity 110 WImpedance 3 Frequency Range 41 Hz - 35 kHzSound Pressure Level 83 dB/WmDimensions (approx.) 210 mm x 315 mm x 220 mm (W/H/D)(8-5/16 inches x 12-7/16 inches x 8-11/16 inches)Mass (approx.) 3.0 kg (6.7 lbs) eachSubwoofer (MX-KC68)Type 1-Way Bass-Reflex TypeSpeaker 16 cm (6-5/16 inches) cone x 1Power Handling Capacity 180 WImpedance 8 Frequency Range 38 Hz - 5 kHzSound Pressure Level 83 dB/WmDimensions (approx.) 210 mm x 315 mm x 242 mm (W/H/D)(8-5/16 inches x 12-7/16 inches x 9-9/16 inches)Mass (approx.) 3.4 kg (7.5 lbs)GeneralPower requirements AC 120 V , 60 HzAudio input AUDIO IN 400 mV/47 kPower supply to iPod DC 5 V 500 mAPower consumption 95 W (MX-KC68) - power on60 W (MX-KC38) - power on9 W - standby mode, without charging iPod0.9 W or less - save modeDimensions (W x H x D) 215 mm x 307 mm x 309 mm(8-1/2 inches x 12-1/8 inches x 12-3/16 inches)Mass (approx.) 3.8 kg (8.4 lbs) (MX-KC68)3.6 kg (8.0 lbs) (MX-KC38)RadioFans.CN 收音机爱 好者资料库(No.MB664)1-3MX-KC68B/E/EN/EVSpecifications and appearance are subject to change without prior notice.Amplifier sectionOUTPUT POWERMain speakers110 W per channel min. RMS driven into 3 at 1 kHz with no more than 10% total harmonic distortionSpeakers/Impedance: 3 - 6 Subwoofer180 W min. RMS driven into 8 at 63 Hz with no more than 10% total harmonic distortionSpeakers/Impedance: 8 - 16 Tuner sectionFM tuning range87.50 MHz - 108.00 MHzAM tuning range522 kHz - 1 629 kHzCD player sectionDynamic range86 dBSignal-to-noise ratio85 dBWow and flutterImmeasurableSpeakersMain speakers(SP-MXKC68F)Type3-Way 3-Speaker Bass-Reflex TypeSpeaker unitsMain Woofer16 cm cone x 1Mid Range5 cm cone x 1Tweeter2 cm dome x 1Power Handling Capacity 110 WImpedance3 Frequency Range41 Hz - 35 kHzSound Pressure Level83 dB/WmDimensions (approx.)210 mm x 315 mm x 220 mm (W/H/D)Mass (approx.)3.0 kg eachSubwoofer (SP-MXKC68W)Type1-Way Bass-Reflex TypeSpeaker16 cm cone x 1Power Handling Capacity 180 WImpedance8 Frequency Range38 Hz - 5 kHzSound Pressure Level83 dB/WmDimensions (approx.)210 mm x 315 mm x 242 mm (W/H/D)Mass (approx.)3.4 kgGeneralPower requirementsAC 230 V , 50 HzAudio input AUDIO IN400 mV/47 kPower supply to iPodDC 5 V 500 mAPower consumption95 W - power on9 W - standby mode, without charging iPod0.8 W or less - save modeDimensions (W x H x D)215 mm x 307 mm x 309 mmMass (approx.)3.8 kg1-4 (No.MB664)MX-KC68A/UJ/UWSpecifications and appearance are subject to change without prior notice.Amplifier sectionOUTPUT POWERMain speakers110 W per channel min. RMS driven into 3 at 1 kHz with no more than 10% total harmonic distortionSpeakers/Impedance: 3 - 6 Subwoofer180 W per channel min. RMS driven into 8 at 63 Hz with no more than 10% total harmonic distortionSpeakers/Impedance: 8 - 16 Tuner sectionFM tuning range87.50 MHz - 108.00 MHzAM tuning range531 kHz - 1 710 kHz (at 9 kHz intervals)530 kHz - 1 710 kHz (at 10 kHz intervals)CD player sectionDynamic range86 dBSignal-to-noise ratio85 dBWow and flutterImmeasurableSpeakersMain speakers (SP-MXKC68F)Type3-Way 3-Speaker Bass-Reflex TypeSpeaker unitsMain Woofer16 cm cone x 1Mid Range5 cm cone x 1Tweeter2 cm dome x 1Power Handling Capacity 110 WImpedance3 Frequency Range41 Hz - 35 kHzSound Pressure Level83 dB/WmDimensions (approx.)210 mm x 315 mm x 220 mm (W/H/D)Mass (approx.)3.0 kg eachSubwoofer (SP-MXKC68W)Type1-Way Bass-Reflex TypeSpeaker16 cm cone x 1Power Handling Capacity 180 WImpedance8 Frequency Range38 Hz - 5 kHzSound Pressure Level83 dB/WmDimensions (approx.)210 mm x 315 mm x 242 mm (W/H/D)Mass (approx.)3.4 kgGeneralPower requirements For AustraliaAC 240 V , 50 HzFor other countriesAC 110 V-127 V/AC 220 V-240 V adjustable with the voltage selector 50 Hz/60 HzAudio input AUDIO IN400 mV/47 kPower supply to iPodDC 5 V 500 mAPower consumption95 W - power on9 W - standby mode, without charging iPod0.8 W or less - save modeDimensions (W x H x D)215 mm x 307 mm x 309 mmMass (approx.)3.8 kg(No.MB664)1-5SECTION 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 TYPE1-6 (No.MB664)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 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 section(No.MB664)1-71.8Important 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 PRINT1-8 (No.MB664)SECTION 2SPECIFIC SERVICE INSTRUCTIONSNew CD mechanism was added.In a model using new CD mechanism for, it stick a blue label for identification on the back side.When it repair the CD mechanism of an article sticking this label on, please use a parts list of FMU-VK1-2M.SECTION 3DISASSEMBLY3.1Main body (Used figure are MX-KC68J)3.1.1Removing the Metal cover (See Fig.1, 2)(1) Remove the six screws A attaching the Metal cover. (SeeFig.1)(2) Remove the four screws B attaching the both side of theMetal cover. (See Fig.2)Fig.1Fig.2A label for identificationAAB(No.MB664)1-93.1.2Removing the Tuner pack (See Fig.3, 4)(1) Disconnect the card wire from Tuner pack connected toconnector CN707 of the Micom board. (See Fig.3)(2) Remove the two screws C attaching the Tuner pack. (SeeFig.4)Fig.3Fig.43.1.3Removing the CD mechanism (See Fig.5, 6)(1) Discon