JVC-RXD402B-avr-sch 维修电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2005 Victor Company of Japan, LimitedNo.MB4482005/9AUDIO/VIDEO CONTROL RECEIVERMB44820059RX-D402B, RX-D401SLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . .

2、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-63DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . .

3、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-195TROUBLESHOOTING . . . . . . . . . . . . . . .

4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19Area suffixJ - U.S.A.RadioFans.CN 收音机爱 好者资料库1-2 (No.MB448)SPECIFICATION*Corresponding to Linear PCM, Dolby Digital, and DTS (with sampling frequency -32 kHz, 44.1 kHz, 48 kHz).Designs and specific

5、ations are subject to change without notice.AmplifierOutput Power At stereo operationFront channels110 W per channel, min. RMS, driven into 6 at 20 Hz to 20 kHz with no more than 0.8% total harmonic distortion.At surround operationFront channels110 W per channel, min. RMS, driven into 6 at 1 kHz wit

6、h no more than 0.8% total har-monic distortion.Center channel110 W, min. RMS, driven into 6 at 1 kHz,with no more than 0.8% total harmonic distortion.Surround channels110 W per channel, min. RMS, driven into 6 at 1 kHz, with no more than 0.8% total har-monic distortion.Surround back channels110 W pe

7、r channel, min. RMS, driven into 6 at 1 kHz, with no more than 0.8% total har-monic distortion.AudioAudio Input Sensitivity/ImpedanceDVR/DVD, VCR, DBS, TV270 mV/47 kAudio Input(DIGITAL IN)*CoaxialDIGITAL 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)

8、USBUSBAudio Output LevelDVR, VCR270 mVSignal-to-Noise Ratio (66 IHF/78 IHF)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 frequency63 Hz, 250 Hz, 1 kHz, 4 kHz, 16 kHzControl range8 dBVideoVideo Input Sensitivity/ImpedanceCom

9、posite 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, VCR (DBS)Y (luminance): 1 V(p-p)/75 PB, PR: 0.7 V(p-p)/75 Video Output Level/ImpedanceComposite video: DVR, VCR, MONITOR OUT 1 V(p-p)/75 S-video: DV

10、R, 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 SynchronizationNegativeHDMIHDMI Input (Ver. 1.1)VCR (DBS), DVR/DVDHDMI Output (Ver. 1.0)MONITOR OUTFM tuner (IHF) Tuning Range87.5 MHz to 108.0

11、 MHzUsable SensitivityMonaural12.8 dBf (1.2 V/75 )50 dB Quieting SensitivityMonaural16.0 dBf (1.7 V/75 )Stereo37.5 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 Consumption150 W/200 VA (at operation)0.

12、9 W (in standby mode)Dimensions (W H D)435 mm 91.5 mm 371 mm (17 3/16 inch-es 3 5/8 inches 14 5/8 inches)Mass7.1 kg (15.7 lbs)RadioFans.CN 收音机爱 好者资料库(No.MB448)1-3SECTION 1PRECAUTION1.1Safety Precautions(1) This design of this product contains special hardware andmany circuits and components speciall

13、y 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 t

14、he 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 therefro

15、m.(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-ag

16、e, 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 wh

17、ich 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 part

18、s, 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 haza

19、rd 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

20、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 grou

21、nd. 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

22、-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

23、 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 repair

24、er 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

25、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

26、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

27、 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.MB448)1.5Importance administering point on the safetyCaution: For continued protection against risk offire, replace only with same type 4 A/125 V forF101, 4 A

28、/125 V for F102, 6.3 A/125 V for F103.This symbol specifies type of fast operating fuse.Precaution: Pour eviter risques de feux, remplacezle fusible de surete de F101 comme le meme typeque 4 A/125 V, 4 A/125 V pour F102, et 6,3 A/125Vpour F103.Ce sont des fusibles suretes qui functionnes rapide.Prim

29、ary board (Forward side) F103Main amplifier board (Forward side) F102F101(No.MB448)1-51.6Caution after repairsThere are two power supply as the second power supply of the transformer.One is a power supply for power IC(3pin), and another is a power supply for the control(5pin).There are two power sup

30、ply as the second power supply of the transformer.One is a power supply for power IC(3pin), and another is a power supply for the control(8pin).Please connect first of all and confirm the power supply for the control when you do the energizing examination after it completes ofthe repair.Please never

31、 do the energizing examination in a power supply of power IC alone.Moreover, when the control system breaks down, power IC is occasionally damaged.+B for power IC(3pins)+B for control section(8pins)For power IC(3pins)1-6 (No.MB448)SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not de

32、scribe SPECIFIC SERVICE INSTRUCTIONS.(No.MB448)1-7SECTION 3DISASSEMBLY3.1Main body section3.1.1Removing the top cover (See Figs.1 and 2)(1) From the both sides of the main body, remove the fourscrews A attaching the top cover. (See Fig.1)(2) From the back side of the main body, remove the fivescrews

33、 B and screw C attaching the top cover. (See Fig.2)(3) Remove the top cover in the direction of the arrow. (SeeFig.1.)Fig.1Fig.23.1.2Removing the HDMI board (See Fig.3) Remove the top cover.(1) From the back side of the main body, remove the threescrews D attaching the HDMI board to the rear panel.(

34、2) From the top side of the main body, remove the screw E at-taching the HDMI board to the support bracket.(3) Disconnect the card wires from the connectors (CN731,CN732, CN762) on the HDMI board.(4) Take out the HDMI board from the main body and discon-nect the parallel wires from the connectors (C

35、N771,CN772) on the reverse side of the HDMI board.Reference:Remove the shield from the HDMI board as required.Fig.3ATop coverBTop coverBBCEDShieldCN732CN731CN771CN762CN772HDMI boardRear panelSupport bracket1-8 (No.MB448)3.1.3Removing the front panel assembly (See Figs.4 and 5) Remove the top cover a

36、nd HDMI board.(1) From the top side of the main body, remove the tie bandbundling the wires. (See Fig.4.)Reference:After reassembling, bundle the wires with a new tie bandas before. (See Fig.4.)(2) Release the wire holders bundling the wires. (See Fig.4)(3) Disconnect the card wire from the connecto

37、r CN102 on themain amplifier board. (See Fig.4)(4) Disconnect the wire from the connector CN351 on the mainamplifier board. (See Fig.4)(5) Disconnect the wire from the connector CN552 on the inputboard. (See Fig.4)(6) Disconnect the wire from the connector CN661 on the DSPboard. (See Fig.4)(7) Remov

38、e the three screws F attaching the front panel as-sembly. (See Fig.4)(8) Remove the screw F attaching the OSD connect 2 board.(See Fig.4)(9) From the bottom side of the main body, remove the fourscrews F attaching the front panel assembly. (See Fig.5)(10) Release the joints a and remove the front pa

39、nel assemblyin the direction of the arrow. (See Fig.5)Fig.4Fig.5FFTie bandWire holdersWire holderCN552Input boardCN661CN351DSP boardOSD connect 2 boardCN102FFWire holderMain amplifier boardFFront panel assemblyFa(No.MB448)1-93.1.4Removing the rear panel (See Fig.6) Remove the top cover.(1) From the

40、back side of the main body, remove the strain re-lief from the rear panel in the direction of the arrow and re-move the power cord.(2) Remove the three screws G and twenty-seven screws Hattaching the rear panel.Fig.63.1.5Removing the tuner (See Fig.7) Remove the top cover.(1) From the top side of th

41、e 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 to the rear panel and take outthe tuner.3.1.6Removing the subwoofer board (See Fig.7) Remove the top cover.(1) From the top side of the main bo

42、dy, disconnect the wirefrom the connector CN524 on the subwoofer board.(2) From the back side of the main body, remove the screw Kattaching the subwoofer board to the rear panel and takeout the subwoofer board.3.1.7Removing the DSP board (See Fig.7) Remove the top cover.(1) From the back side of the

43、 main body, remove the fivescrews M attaching the DSP board to the rear panel.(2) Remove the screw N attaching the DSP board.(3) Disconnect the DSP board from the DSP connect boardwhile releasing the claw b of the connector CN681 on theDSP board.Note:When releasing the claw b, take care not to break

44、 it.(4) Take out the DSP board and disconnect the wires from theconnectors (CN661, CN682, CN683) on the forward side ofthe DSP board.(5) Disconnect the card wires from the connectors (CN651,CN652) on the forward side of the DSP board.Fig.7Strain reliefHRear panelPower cordGHH GHNCN682CN683DSP boardC

45、N661CN652CN651TunerRear panelRear panelCN1CN524Subwoofer boardKJMCN681DSP boardbDSP connect board1-10 (No.MB448)3.1.8Removing the compulink board (See Fig.8) Remove the top cover and HDMI board.(1) From the top side of the main body, disconnect the wirefrom the connector CN565 on the compulink board

46、.(2) From the back side of the main body, remove the screw Pattaching the compulink board to the rear panel and takeout the compulink board.3.1.9Removing the primary board (See Fig.8) Remove the top cover and HDMI board.(1) From the top side of the main body, remove the screw Qattaching the support

47、bracket on the chassis base.(2) Release the wire holders and disconnect the wire from theconnector CN101 on the main amplifier board.(3) Disconnect the power cord from the connector CN120 onthe primary board.(4) Remove the two screws R and two screws R attaching theprimary board.Reference:When attac

48、hing the screws R, attach the wire holderswith them as before.(5) Take out the primary board from the main body and removethe wires from the soldered sections c on the reverse sideof the primary board.Fig.8RRcR RQPCompulink boardRear panelWire holderCN120Support bracketMain amplifier boardWire holde

49、rCN101Wire holderChassis basePrimary boardCN565(No.MB448)1-113.1.10 Removing the power transformer (See Fig.9) Remove the top cover.(1) From the top side of the main body, remove the tie bandbundling the wires.Reference:After reassembling, bundle the wires with a new tie bandas before.(2) Release th

50、e wire holders to remove the wires.(3) Disconnect the wires from the connectors (CN106, CN111)on the main amplifier board.(4) Remove the soldered sections d and remove the wires.(5) Remove the four screws S and take out the power trans-former from the main body.3.1.11 Removing the trans primary boar