Jvc-MXKC-45-Service-Manual电路原理图.pdf
SERVICE MANUALCOPYRIGHT © 2006 Victor Company of Japan, LimitedNo.MB5502006/7COMPACT COMPONENT SYSTEMMB55020067MX-KC45E,MX-KC45EN,MX-KC45A,MX-KC45UW,MX-KC45UY,MX-KC45UJLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-53 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-64 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-125 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13CA-MXKC45 SP-MXKC45SP-MXKC451-2 (No.MB550)SPECIFICATIONDesign and specifications are subject to change without notice.Amplifier Output Power (IEC 268-3) 155 W per channel, min. RMS, driven into 6 at 1kHz, with no more than 10% total harmonic distortion(DIN-3) 125 W per channel, min. RMS, driven into 6 at 1kHz, with no more than 0.9% total harmonic distortionInput Sensitivity/Impedance (1 kHz)AUX INSpeaker terminals400 mV/50 k6 - 16 Phones 32 - 1 k17 mW/ch output into 32 Cassette Deck Section Frequency Response : Type I (NORMAL) 63 Hz - 12 500 HzWow And Flutter 0.15% (WRMS)CD Player CD Capacity 3 CDsDynamic Range 85 dBSignal-To-Noise Ratio 85 dBWow And Flutter UnmeasurableTuner FM Tuner : Tuning Range 87.50 MHz - 108.00 MHz87.50 MHz - 108.00 MHz (at AM9 kHz channel space)87.5 MHz - 108.0 MHz (at AM10 kHz channel space)AM Tuner : Tuning Range 522 kHz - 1710 kHz522 kHz - 1 629 kHz (for Europe)531 kHz - 1710 kHz (at AM9 kHz channel space)530 kHz - 1710 kHz (at AM10 kHz channel space)Unit Dimensions 270 mm × 307 mm × 492 mm (W/H/D)Mass Approx. 9.3 kgSpeaker Specifications(each unit)Type 3-way bass-reflex typeSpeaker Unit Woofer 16 cm cone × 1Mid 5cm cone × 1Tweeter 2cm dome × 1Power Handling Capacity 160 WImpedance 6 Frequency Range 45 Hz - 22 000 HzSound pressure level 87 dB/W·mDimensions 220 mm × 324 mm × 238 mm (W/H/D)Mass Approx. 3.6 kgPower Specifications Power Requirements AC 240 V , 50 Hz (for Australia)AC 230 V , 50 Hz (for Europe)AC 110 V-127 V/220 V-240 V , adjustable with voltage selector, 50 Hz/60 Hz (for Asia)Power Consumption 165 W (power on mode)23 W (in Standby mode)1 W (in ECO mode)(No.MB550)1-3SECTION 1PRECAUTION1.1 Safety 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 a“Leakage 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 0.15µF 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.). 1.2 Warning(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.1.3 CautionBurrs 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.1.4 Critical 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.MB550)1.5 Important for laser products1.CLASS 1 LASER PRODUCT 2.CAUTION : (For U.S.A.) Visible and/or invisible class II laser radiationwhen open. Do not stare into beam.(Others) Visible and/or invisible class 1M laser radiationwhen open. Do not view directly with optical instruments. 3.CAUTION : Visible and/or invisible laser radiation whenopen and inter lock failed or defeated. Avoid directexposure 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 ableto 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.MB550)1-5SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.1-6 (No.MB550)SECTION 3DISASSEMBLY3.1 Main Body3.1.1 Removing the metal cover (See Fig.1, 2)(1) Remove the two screws A and four screws B attaching themetal cover from both side of the main body. (See Fig.1)(2) Remove the six screws C attaching the metal cover fromback side of main body. (See Fig.2)3.1.2 Removing the heat sink cover (See Fig.2, 3)(1) Disconnect the connector wire from the fan connected toconnector CN603 of the amp board. (See Fig.3)(2) Remove the four screws D attaching the heat sink cover.(See Fig.2)3.1.3 Removing the fan (See Fig.2)(1) Remove the four screws E attaching the fan.Fig.1Fig.2Fig.3ABB(both side)CE E CCCDDDDECN601CN603aGG(No.MB550)1-73.1.4 Removing the 3CD changer mechanism (See Fig.3 to 7)(1) Disconnect the card wire from amp board connected to theconnector CN601 of the main board. (See Fig.3)(2) Disconnect the card wire from the tuner pack connected tothe connector CN306 of the main board. (See Fig.4)(3) Open the CD tray and remove the CD door.Caution:If the CD tray can not open at power to ON condition, ro-tate the gear and open the CD tray. (See Fig.5)(4) Disconnect the card wire connected to the connectorCN201 and CN303 of the main board. (See Fig.6)(5) Disconnect the connector wire connected to the connectorCN301 and CN302 of the main board. (See Fig.6)(6) Remove the two screws F attaching the 3CD changermechanism of back side of the main body. (See Fig.7)(7) Remove the four screws G attaching the 3CD changermechanism from both side of the main body. (See Fig.3, 4)Fig.4Fig.5Fig.6Fig.7CN306QGGEAR (top view)CN303CN302 CN301CN201HHHH F1-8 (No.MB550)3.1.5 Removing the main board (See Fig.6, 8, 9)(1) Remove the six screws H attaching the main board. (SeeFig.6)(2) Disconnect the connector wire connected to the connectorCW3 of the motor board. (See Fig.8)(3) Disconnect the connector wire connected to the connectorof the traverse mechanism. (See Fig.8)(4) Solder the short land section of the CD pickup and then dis-connected the card wire from the main board connected tothe CD pickup. (See Fig.9)Caution: Solder the short land section of the CD pickup before discon-necting the card wire from the connector on the CD pickup.If the card wire is disconnected without attaching the sol-ders, the pickup may be destroyed by static electricity. When attaching the CD pickup, be sure to remove soldersfrom the short land section after connecting the card wire tothe connector on the CD pickup.Fig.8Fig.9connector wireCW3traverse mechanismmotor boardshort land section(No.MB550)1-93.1.6 Removing the tuner pack (See Fig.11)(1) Remove the two screws J attaching the tuner pack.3.1.7 Removing the amp board (See Fig.10, 11)(1) Disconnect the connector wire from the front board con-nected to the connector CN202 of the amp board. (SeeFig.10)(2) Disconnect the connector wires from the power transform-er connected to the connector CN902 and CN903 of theamp board. (See Fig.10)(3) Remove the four screws K attaching the amp board. (SeeFig.11)(4) Remove the three screws L attaching the amp board. (SeeFig.11)3.1.8 Removing the voltage selector board (See Fig.11)(1) Remove the two screws M attaching the voltage selectorboard.3.1.9 Removing the rear panel (See Fig.11)(1) Remove the four screws N attaching the rear panel.Fig.10Fig.11CN202 CN903CN902KKKLLLMNJ1-10 (No.MB550)3.1.10 Removing the front panel assembly (See Fig.3, 4, 12, 13)(1) Disconnect the two earth wires from the bottom plate. (SeeFig.12)(2) Remove the one screw P attaching the front panel assem-bly from bottom side. (See Fig.13)(3) Remove the two screws Q attaching the front panel assem-bly from both side of the main body. (See Fig.4)(4) Disengage the hook a on the both side of the front panelassembly. (See Fig.3)Fig.12Fig.13earth wireP
