JVC-FSS57-cs-sm 维修电路原理图.pdf

SERVICE MANUALCOPYRIGHT 2004 VICTOR COMPANY OF JAPAN, LIMITEDNo.MB2052004/4COMPACT COMPONENT SYSTEMMB20520044FS-S57TABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-63DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-305TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31 Area suffixJ - U.S.A.C - CanadaRadioFans.CN 收音机爱 好者资料库1-2 (No.MB205)SPECIFICATIONDesign and specifications are subject to change without notice.Amplifier SectionCA-FSS57Output Power74 W per channel, min. RMS, driven into 6 at 1 kHz with no morethan 10% total harmonic distortion.Analog input sensitivity/Impedance (at 1 kHz) AUX/DVD:400 mV/48 kSpeakers/Impedance6 - 16 TunerFM tuning range87.5 MHz-108.0 MHzAM tuning range530 kHz-1 710 kHzCD playerCD Capacity5 CDsDynamic range87 dBSignal-to-noise ratio90 dBWow and flutterImmeasurableGeneralPower requirementAC 120 V , 60 HzPower consumption110 W (at operation)17 W (on standby)1.4 W (in power save mode)Dimensions (W/H/D) (approx.)175 mm 239.5 mm 378 mm (6 15/16 in. 9 1/2 in. 14 15/16 in.)Mass (approx.)7.4 kg (16.3 lbs)Speaker SectionSP-UXS57Type2-way bass-reflex typeSpeakersWoofer 12 cm cone 1Tweeter 4 cm cone 1Power handling capacity60 WImpedance6 Frequency range53 Hz to 30 kHzSound pressure level84 dB/WmDimensions (W/H/D) (approx.)145 mm 239.5 mm 202 mm (5 3/4 in. 9 1/2 in. 8 in.)Mass (approx.)2.2 kg (4.9 lbs) eachRadioFans.CN 收音机爱 好者资料库(No.MB205)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.MB205)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 flexible wire is disconnected from the connecto on the servo board. (If the flexiblewire is 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 flexible wire.1MConductive material(conductive sheet) or iron palate(caption)Anti-static wrist strapCaution: For continued protection against risk offire, replace only with same type 2.5 A/125 V forF1000, 1.5 A/125 V for F1001.This symbol specifies type of fast operating fuse.Precaution: Pour eviter risques de feux, remplacezle fusible de surete de F1000 comme le meme typeque 2,5 A/125 V, et 1,5 A/125 V pour F1001.Ce sont des fusibles suretes qui functionnes rapide.(No.MB205)1-51.8Importance administering point on the safetyCaution: For continued protection against risk offire, replace only with same type 2.5 A/125 V forF1000, 1.5 A/125 V for F1001.This symbol specifies type of fast operating fuse.Precaution: Pour eviter risques de feux, remplacezle fusible de surete de F1000 comme le meme typeque 2,5 A/125 V, et 1,5 A/125 V pour F1001.Ce sont des fusibles suretes qui functionnes rapide.Primary board2.5A-125VF10001.5A-125VF10011-6 (No.MB205)SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.(No.MB205)1-7SECTION 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 sixscrews A attaching the metal cover. (See Fig.1.)(2) From the both sides of the main body, remove the twoscrews B attaching the metal cover. (See Figs.2 and 3.)(3) Remove the metal cover in the direction of the arrow whileextending the lower sections of the metal cover. (SeeFigs.2 and 3.)Fig.1Fig.2Fig.3AAAMetal coverBMetal coverBMetal cover1-8 (No.MB205)3.1.2Removing the front panel assembly (See Figs.4 to 6) Remove the metal cover.(1) From the left side of the main body, disconnect the wirefrom the connector CN104 on the power supply board.(See Fig.4.)Reference:After connecting the wire to the connector CN104, fix thewire with the spacer as before. (See Fig.4.)(2) Disconnect the card wire from the connector CN700 on themicon board. (See Figs.4 and 5.)Reference:After connecting the card wire to the connector CN700,fix the card wire with the spacer as before. (See Fig.4.)(3) From the top side of the main body, remove the screws Cattaching the front panel assembly. (See Fig.5.)(4) From the bottom side of the main body, remove the twoscrews D attaching the front panel assembly. (See Fig.6.)(5) Release the two hooks a and hook b from the both and bot-tom sides of the front panel assembly, and remove the frontpanel assembly in the direction of the arrow. (See Fig.6.)Reference:When attaching the front panel assembly, fit the micon boardto the notch c on the back side of the front panel assembly.(See Fig.5.)Fig.4Fig.5Fig.6Front panel assemblySpacerPower supply boardCN104Micon boardCN700Card wireCMicon boardcMicon boardFront panel assemblyCN700Card wireDFront panel assembly aba(No.MB205)1-93.1.3Removing the rear panel (See Fig.7) Remove the metal cover.(1) From the back side of the main body, remove the fivescrews E attaching the rear panel.(2) Remove the screw F attaching the rear cover.(3) Remove the rear panel from the chassis while extendingthe sections d of the rear panel in the direction of the arrow.Reference:When removing the rear cover, remove the screw F and twoscrews F.Fig.73.1.4Removing the power supply board (See Fig.8) Remove the metal cover.(1) From the left side of the main body, remove the screw Gand screw H attaching the power supply board.(2) Disconnect the connectors CN103 on the power supplyboard toward this side.(3) From the forward side of the power supply board, discon-nect the wires from the connectors (CN100 to CN102,CN104).Reference:When attaching the screw G, attach the primary protector withit.3.1.5Removing the tuner (See Fig.8) Remove the metal cover.(1) From the left side of the main body, disconnect the cardwire from the connector CN1 on the tuner.(2) From the back side of the main body, remove the twoscrews J attaching the tuner.Reference: After attaching the tuner, put the card wire on the section eof the primary protector. When connecting the card wire to the connector CN1, fix thecard wire with the spacer as before.Fig.8ERear panelRear coverddFEFFGCard wireCN102HCN1Power supply boardeCN103CN100CN101JTunerPrimary protectorCN104WireCN1Spacer1-10 (No.MB205)3.1.6Removing the micon board (See Figs.9 and 10) Remove the metal cover, front panel assembly and rear panel.(1) From the top side of the main body, disconnect the cardwire from the connector CN766 on the micon board. (SeeFig.9.)Reference:When connecting the card wire to the connector CN766,fix the card wire with the spacer as before.(2) From the forward side of the micon board, disconnect thewire from the connectors (CN750, CN760) on the miconboard. (See Fig.9.)Reference:When reassembling, fix the wire with the wire holder af-ter connecting the wire to the connector CN760 on themicon board as before. (See Fig.9.)(3) From the right side of the main body, remove the threescrews K attaching the micon board. (See Fig.10.)(4) Disconnect the connectors (CN761,CN762) on the miconboard toward this side. (See Fig.10.)(5) From the forward side of the micon board, disconnect thecard wire from the connectors CN765. (See Fig.10.)Fig.9Fig.10Micon boardWire holderCN766CN760CN766SpacerCN750Card wireWiresKMicon boardCN765CN762CN761K(No.MB205)1-113.1.7Removing the power amplifier board (See Fig.11) Remove the metal cover, front panel assembly, rear panel,power supply board and micon board.(1) From the top side of the main body, remove the wire holderand tie band fixing the wire 1.(2) Remove the four screws L attaching the power amplifierboard.Reference: When attaching the power amplifier board, align the sectionsf of the main chassis in the slots of the main amplifier board. After attaching the power amplifier board, pass the wire 1through the section g of the power amplifier board. When reassembling, fix the wire 1 with the wire holder andnew tie band as before. When reassembling, pass the wire 2 through the section hof the power amplifier board.Fig.113.1.8Removing the heat sink (See Figs.12 and 13) Remove the metal cover, front panel assembly, rear panel,power supply board, micon board and power ampl