JVC-RXF10S-htr-sm 维修电路原理图.pdf

SERVICE MANUALCOPYRIGHT 2004 Victor Company of Japan, LimitedNo.MB2642004/6HOME THEATER RECEIVERMB26420046RX-F10STABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-53DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-64ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-185TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19Area suffixJ - U.S.A.C - CanadaRadioFans.CN 收音机爱 好者资料库1-2 (No.MB264)SPECIFICATION*1: Corresponding to Linear PCM, Dolby Digital, and DTS (with sampling frequency -32 kHz, 44.1 kHz, 48 kHz).Designs & specifications are subject to change without notice.AmplifierOutput PowerAt stereo op-erationFront channels100 W per channel, min. RMS, both channels driven into 6 at 40 Hz to 20 kHz with no more than 0.8% total harmonic distortion.At surround operationFront channels100 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 0.8% total harmonic distortion.Center channel100 W, min. RMS, driven into 6 at 1 kHz, with no more than 0.8% total harmonic distortion.Surround channels100 W per channel, min. RMS, driven into 6 at 1 kHz, with no more than 0.8% total harmonic distortion.Surround back channel100 W, min. RMS, driven into 6 at 1 kHz, with no more than 0.8% total harmonic distortion.AudioAudio Input Sensitivity/Imped-anceDVR/DVD (DVD MULTI), VCR, DBS, TV:330 mV/47 kAudio Input (DIG-ITAL IN)*1CoaxialDIGITAL IN 1(DVR/DVD):0.5 V(p-p)/75 OpticalDIGITAL IN 2(DBS), 3(VCR): -21 dBm to -15 dBm (660 nm 30 nm)Audio Output LevelDVR, VCR, MONITOR OUT:330 mVSignal-to-Noise Ratio (66 IHF/DIN)80 dB/62 dBFrequency Response (6 )20 Hz to 20 kHz (1 dB)Bass Boost+4 dB 1 dB at 100 HzEqualization (at DSP operation)Center frequency:63 Hz, 250 Hz, 1 kHz, 4 kHz, 16 kHzControl range:8 dBVideoVideo Input Sensitivity/Imped-anceComposite video:DVR/DVD, VCR, DBS1 V(p-p)/75 S-video:DVR/DVD, VCR, DBSY (luminance):1 V(p-p)/75 C (chrominance, burst):0.286 V(p-p)/75 Component:DVR/DVD, VCRY (luminance):1 V(p-p)/75 PB, PR:0.7 V(p-p)/75 Video Output Level/ImpedanceComposite video:DVR, VCR, MONITOR OUT1 V(p-p)/75 S-video:DVR, VCR, MONITOR OUTY (luminance):1 V(p-p)/75 C (chrominance, burst):0.286 V(p-p)/75 Component:MONITOR OUTY (luminance):1 V(p-p)/75 PB, PR:0.7 V(p-p)/75 SynchronizationNegativeFM tuner (IHF)Tuning Range87.5 MHz to 108.0 MHzUsable SensitivityMonaura:12.8 dBf (1.2 V/75 )50 dB Quieting SensitivityMonaural:16.0 dBf (1.7 V/75 )Stereo:37.5 dBf (20.5 V/75 )Stereo Separation at REC OUT35 dB at 1 kHzAM tunerTuning Range530 kHz to 1 710 kHzGeneralPower RequirementsAC 120 V , 60 HzPower Consumption120 W/160 VA (at operation) 2 W (in standby mode)Dimensions (W H D)435 mm 70 mm 329.5 mm (17 3/16 inches 2 13/16 inches 13 inches)Mass6.3 kg (13.9 lbs)RadioFans.CN 收音机爱 好者资料库(No.MB264)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.MB264)1.5Importance administering point on the safetyCaution: For continued protection against risk of fire,replace only with same type 4 A/125 V for F205,2 A/125 V for F202 and F203. This symbol specifies the type of fast operating fuse.Precaution: Pour la protection continue contre lesrisques dincendie, remplacer uniquement par lememe type: fusible 4 A/125 V pour le F205,2 A/125 V pour le F202 et F203. Ce symbole specifie le type de fusible a action rapide.Secondary boardPrimary boardF2022A-125V2A-125VF2034A-125VF205(No.MB264)1-5SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.1-6 (No.MB264)SECTION 3DISASSEMBLY3.1Removing the top cover (See Figs.1 to 3)(1) From the both sides of the main body, remove the twoscrews A attaching the top cover. (See Figs.1 and 2.)(2) From the back side of the main body, remove the fivescrews B attaching the top cover. (See Fig.3.)(3) Lift the rear section of the top cover in the direction of thearrow while extending the lower sections of the top coverand remove the top cover from the main body. (See Figs.1and 2.)Fig.1Fig.2Fig.3ATop coverATop coverTop coverBB(No.MB264)1-73.2Removing the front panel assembly (See Figs.4 and 5) Remove the top cover.(1) From the top side of the main body, remove the divider.(See Fig.4.)Reference:After attaching the front panel assembly, attach the divid-er as before. (See Fig.4.)(2) Disconnect the wire from the connector CN421 on the con-nection 2 board. (See Fig.4.)(3) Remove the tie band and wire clamps. (See Fig.4.)(4) Disconnect the wire from the connector CN412 on the sec-ondary board. (See Fig.4.)Reference:After connecting the wire to the connector, bundle thewires with the other wires using the wire clamps and newtie band as before. (See Fig.4.)(5) Remove the screw C and two screws C attaching the frontpanel assembly. (See Fig.4.)Reference:When attaching the screws C, attach the earth wireswith them. (See Fig.4.)(6) From the bottom side of the main body, remove the fourscrews D attaching the front panel assembly. (See Fig.5.)(7) Release the two claws a and claw b, remove the front panelassembly in the direction of the arrow. (See Fig.5.)Fig.4Fig.53.3Removing the rear panel (See Fig.6) Remove the top cover.(1) From the back side of the main body, remove the strain re-lief attaching the power cord in the direction of the arrow.(2) Remove the twenty-five screws E attaching the rear panel.(3) Release the engagement sections c and remove the rearpanel from the main body.Fig.6Secondary boardEarth wireEarth wireCCN412DividerWire clampsTie bandFront panel assemblyCN421Connection 2 boardWireCCaaFront panel assemblyDbccStrain reliefRear panelPower cordEE1-8 (No.MB264)3.4Removing the tuner (See Figs.7 and 8) Remove the top cover.(1) From the top side of the main body, disconnect the cardwire from the connector CN1 on the tuner. (See Fig.7.)(2) From the back side of the main body, remove the twoscrews F attaching the tuner. (See Fig.8.)(3) Take out the tuner from the main body.3.5Removing the video/audio board (See Figs.7 and 8) Remove the top cover.(1) From the top side of the main body, remove the divider.Reference:When reassembly, attach the divider as before.(2) From the back side of the main body, remove the fourscrews G attaching the video/audio board. (See Fig.8.)(3) From the top side of the main body, take out the video/au-dio board from the main body and disconnect the card wirefrom the connector CN532 on the forward side of the video/audio board. (See Fig.7.)Reference:Remove the divider as required. (See Fig.7.)3.6Removing the DSP board (See Figs.8 and 9) Remove the top cover.(1) From the back side of the main body, remove the fourscrews H attaching the DSP board. (See Fig.8.)(2) From the top side of the main body, remove the tie bandsbundling the wires. (See Fig.9.)Reference:After reassembling, bundle the wires with the new tiebands as before. (See Fig.9.)(3) From the forward side of the DSP board, release the lock dof the connector CN601 in the direction of the arrow anddisconnect the DSP board from the connection 1 board.(See Fig.9.)Note:When releasing the lock d of the connector CN601, takecare not to break the lock. (See Fig.9.)(4) From the forward side of the DSP board, disconnect thecard wire from the connector CN602. (See Fig.9.)Fig.7Fig.8Fig.9DividerCard wireCN532Video Audio boardCN1TunerVideo/AudioDSP boardTunerHGGFTie bandWiresDSP boardCN601dDSP boardConnection 1boardCN602(No.MB264)1-93.7Removing the compu board (See Fig.10) Remove the top cover.(1) Remove the screws J attaching the compu board.(2) Disconnect the wire from the connector CN565 on the com-pu board.(3) Take out the compu board from the main body.Fig.103.8Removing the primary board (See Fig.11) Remove the top cover and video/audio board.(1) From the top side of the main body, remove the divider.(2) Disconnect the wire from the connector CN208 on the sec-ondary board.(3) Disconnect the wire and power cord from the connectors(CN202, CN203) on the primary board.(4) Remove the four screws K attaching the primary board.(5) Take out the primary board from the main body.Fig.11Compu boardCN565JDividerKKWireWireCN203CN202CN208Secondary boardPower cordPrimary board1-10 (No.MB264)3.9Removing the power transformer (See Fig.12) Remove the top cover.(1) From the top side of the main body, remove the tie bandsand wire clamp bundling the wires.Reference:After reassembling, bundle the wires with the new tiebands and wire clamp as before.(2) Disconnect the wire from the connector CN201 on the sec-ondary board.(3) Disconnect the wire from the connector CN202 on the pri-mary board.(4) Disconnect the wire from the connector CN702 on the mainamplifier board.(5) Remove the four screws L attaching the power transform-er.(6) Take out the power transformer from the main body.Fig.123.10 Removing the secondary board (See Fig.13) Remove the top cover.(1) From the top side of the main body, remove the divider.Reference:When reassembly, attach the divider as before.(2) Remove the tie bands bundling the wires.Reference:After reassembling, bundle the wires with the new tiebands as before.(3) Disconnect the wires from the connectors (CN201, CN207,CN208, CN211, CN216, CN261, CN412, CN510, CN520,CN721) on the secondary board.Reference:Disconnect the wire from the connector CN702 on themain amplifier board as required.(4) Remove the four screws M attaching the secondary board.(5) Take out the secondary board from the main body.Reference:When attaching the secondary board, insert the sectione of the secondary board in the hole of the heat sink andattach the secondary board.Fig.13Main amplifier boardWiresWire clampPower transformerTie bandsSecondary boardPrimary boardCN702CN201CN202WireWireLLLMain amplifier boardWiresCN211CN216CN207CN510CN520CN721CN702Heat sinkeDividerCN412Tie bandsSecondary boardCN201CN261CN208MMMM(No.MB264)1-113.11 Removing the speaker terminal board (See Figs.14 and 15) Remove the top cover and DSP board.(1) From the top side of the main body, disconnect the wiresfrom the connectors (CN301, CN701, CN725, CN801) onthe speaker terminal board. (See Fig.14.)(2) From the back side of the main body, remove the twoscre