JVC-RXD702B-avr-sch 维修电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2006 Victor Company of Japan, LimitedNo.MB5002006/1AUDIO/VIDEO CONTROL RECEIVERMB50020061RX-D701SB,RX-D701SE,RX-D701SENRX-D702BB,RX-D702BE,RX-D702BENLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS1PRECAUTIONS . . . . .

2、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-53DISASSEMBLY . . . . .

3、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-64ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-95TROUB

4、LESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9RadioFans.CN 收音机爱 好者资料库1-2 (No.MB500)SPECIFICATIONDesigns and specifications are subject to change without notice.AmplifierOutput PowerAt stereo operation

5、Front channels130 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 0.8% total harmonic distortion (IEC268-3/DIN).At surround operationFront channels130 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 0.8% total harmonic distortion.Center channel130 W, min. RMS, dri

6、ven into 6 at 1 kHz, with no more than 0.8% total harmonic distortion.Surround channels130 W per channel, min. RMS, driven into 6 at 1 kHz, with no more than 0.8% total harmonic distortion.Surround back channels130 W per channel, min. RMS, driven into 6 at 1 kHz, with no more than 0.8% total harmoni

7、c distortion.AudioAudio Input Sensitivity/ImpedanceDVR/DVD, VCR, DBS, TV300 mV/47 kAudio Input (DIGITAL IN) Coaxial:DIGITAL IN 1(DVR/DVD)0.5 V(p-p)/75Optical:DIGITAL IN 2(DBS), 3(VCR)-21 dBm to -15 dBm (660 nm 30 nm)USBUSB WIRELESSUSB TERMINALAudio Output LevelDVR, VCR300mVSignal-to-Noise Ratio (66

8、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, 4kHz, 16 kHzControl range8 dBVideoVideo Input Sensitivity/ImpedanceComposite video:DVR/DVD, VCR, DBS1 V(p-p)/75 S-video:DVR/DVD, VCR, D

9、BSY (luminance): 1 V(p-p)/75 C (chrominance, burst): 0.3 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 OUT1 V(p-p)/75 S-video:DVR, VCR, MONITOR OUTY (luminance): 1 V(p-p)/75 C (chrominance, burst):

10、 0.3 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 Range87.50 MHz to 108.00 MHzUsable SensitivityMonaural12.8 dBf (1.2 V/75 )50 dB Quieting Sensit

11、ivity Monaural16.0 dBf (1.7 V/75 )Stereo37.5 dBf (20.5 V/75 )Stereo Separation at REC OUT35 dB at 1 kHzAM tunerTuning Range531 kHz to 1 710 kHzGeneralPower RequirementsAC 240 V , 50 HzPower Consumption180 W (at operation)5.0 W (in standby mode)Dimensions (W H D)435 mm 91.5 mm 371 mmMass7.8 kgUSB WIR

12、ELESS SYSTEMThe USB wireless transmitter supplied with this receiver supports Direct Sequence Spreading Spectrum (DSSS) using 2.4 GHz frequency band.RadioFans.CN 收音机爱 好者资料库(No.MB500)1-3SECTION 1PRECAUTIONS1.1Safety Precautions(1) This design of this product contains special hardware andmany circuits

13、 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 o

14、nly.(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 propertyd

15、amage 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

16、 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

17、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

18、 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-blin

19、g.(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 elect

20、rical 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

21、 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

22、 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 acrossth

23、e 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 resp

24、onsibility 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 local

25、voltage.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

26、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

27、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.MB500)1.5 Safety Precautions (U.K only)(1) This design of this product contains special hardware and many circuits and components spec

28、ially for safety purposes. For con-tinued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replace-ment parts must be identical to those used in the original circuits.(2) Any unauthorised design alterations or additions will void the manu

29、facturers guarantee; furthermore the manufacturer cannotaccept responsibility for personal injury or property damage resulting therefrom.(3) Essential safety critical components are identified by ( ) on the Parts List and by shading on the schematics, and must neverbe replaced by parts other than th

30、ose listed in the manual. Please note however that many electrical and mechanical parts inthe product have special safety related characteristics. These characteristics are often not evident from visual inspection. Partsother than specified by the manufacturer may not have the same safety characteri

31、stics as the recommended replacement partsshown in the Parts List of the Service Manual and may create shock, fire, or other hazards.(4) The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts,high temperature parts, moving p

32、arts and/or sharp edges for the prevention of electric shock and fire hazard. When service isrequired, the original lead routing and dress should be observed, and it should be confirmed that they have been returned tonormal, after re-assembling.1.5.1Warning(1) Service should be performed by qualifie

33、d personnel only.(2) This equipment has been designed and manufactured to meet international safety standards.(3) It is the legal responsibility of the repairer to ensure that these safety standards are maintained.(4) Repairs must be made in accordance with the relevant safety standards.(5) It is es

34、sential that safety critical components are replaced by approved parts.(6) If mains voltage selector is provided, check setting for local voltage.Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this

35、 system.(No.MB500)1-5SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.1-6 (No.MB500)SECTION 3DISASSEMBLY3.1Main body section3.1.1Removing the top cover (See Fig.1 and 2)(1) From the both sides of the main body, remove the fourscrews A attachin

36、g the top cover. (See fig. 1)(2) From the back side of the main body, remove the fivescrews B and screw C attaching the top cover. (See Fig. 2)Reference:When removing the screw C, use a screwdriver to showas follows.TORX Driver: size T10Parts number: DR-L70(3) Remove the top cover in the direction o

37、f the arrow. (SeeFig. 1)Fig.1Fig.23.1.2Removing the USB wireless board (See Fig. 3) Remove the top cover.(1) From the top side of the main body, disconnect the LANmodule board from USB board.(2) Remove the two screws D attaching the USB board.(3) Disconnect the connector wire from connector CN662 of

38、the DSP board.Fig.3ATop coverBTop coverBBCDRear panelCoaxial connectorCN662DSP boardUSB wireless board(No.MB500)1-73.1.3Removing the fan motor (See Fig. 4) Remove the top cover.(1) Remove the tie band bundling the wires.(2) From the top side of the main body, disconnect the wirefrom the connector CN

39、103 on the main amplifier board.(3) Remove the three screws E and take out the fan motor as-sembly.(4) Remove the two screws F attaching the fan motor to the fanbracket.Fig.43.1.4Removing the HDMI board (See Figs.5 and 6) Remove the top cover.(1) From the back side of the main body, remove the three

40、screws G attaching the HDMI board to the rear panel. (SeeFig.5)(2) From the top side of the main body, remove the screw H at-taching the HDMI board. (See Fig.6)(3) Disconnect the card wires from the connectors (CN731,CN732, and CN762) on the HDMI board. (See Fig.6)(4) Disconnect the parallel wire fr

41、om the connector CN711 onthe HDMI board. (See Fig.6)(5) Take out the HDMI board from the main body. (See Fig.6)3.1.5Removing the DSP board (See Figs.5 and 6) Remove the top cover and fan motor.(1) From the back side of the main body, remove the fivescrews J attaching the DSP board to the rear panel.

42、 (SeeFig.5)(2) From the top side of the main body, remove the screw K at-taching the DSP board. (See Fig.6)(3) Disconnect the connector CN681 on the DSP board fromthe DSP connect board. (See Fig.6)Note:When removing the DSP board, take care not to breakthe claw of the connector on it.(4) Take out th

43、e DSP board and disconnect the wires from theconnectors (CN661, CN682, and CN683) on the forwardside of the DSP board. (See Fig.6)(5) Disconnect the card wires from the connectors (CN651,CN652) on the DSP board. (See Fig.6)(6) Take out the DSP board from the main body.Fig.5Fig.6Fan motor assemblyCN1

44、03Main amplifier boardFFan motorFFan bracketEERear panelGJHKHDMI boardCN771CN762CN651CN681DSP boardCN661CN683CN682CN652CN731CN7321-8 (No.MB500)3.1.6Removing the SCART board (See Fig.7 and 8) Remove the top cove, USB board, DSP board and HDMIboard.(1) Remove the six screws L attaching the SCART board

45、.(See Fig.7)(2) Disconnect the card wire from CN537 and CN539 of theSCART board. (See Fig.8)Fig.7Fig.83.1.7Removing the input board (See Fig.9 and 10)(1) Remove the seven screws M attaching the inputboard.(See Fig.9)(2) Remove the three screws N attaching the input board. (SeeFig.10)(3) Disconnect t

46、he each wire from each connector of the inputboard.Fig.9Fig.103.2Other itemFor the other items, please refer to RX-D701S,RX-D702B No.MB441.LLLCN537SCART boardCN539MNInput board(No.MB500)1-9SECTION 4ADJUSTMENTThis service manual does not describe ADJUSTMENT.SECTION 5TROUBLESHOOTINGThis service manual

47、 does not describe TROUBLESHOOTING.(No.MB500)Audio/Video Systems Category 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,JapanVictor Company of Japan, LimitedVPTPrinted in JapanSCHEMATIC DIAGRAMSRX-D701SB,RX-D701SE,RX-D701SENRX-D702BB,RX-D702BE,RX-D702BENContentsBlock diagramsStandard schematic d

48、iagramsPrinted circuit boards2-12-22-15 to 21CD-ROM No.SML200601AUDIO/VIDEO CONTROL RECEIVERNo.MB500SCH2006/1COPYRIGHT 2006 Victor Company of Japan, Limited.Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)In regard with component parts appearing on the silk-sc

49、reen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the mark nearby are critical for safety. 2-1Block diagramCN106CN111CN101CN152CN151IC111 to IC113, IC115DCDC convertercontrolPWM_V,Vout_DETM_

50、CLOCK,SSS_ON/OFFAC_DET_1VCHANGE_1VCHANGE_2D1101toD1104Q1101Q1102IC101DCDCconverterPWM_VVout_DETAC_DET_1D101toD104D+5V_MiB+5V_MiD111,D112D119,D120S2S3S2Q102VPP REG.VPPCN102IC151A+5V_DSPREGCN130A+5V_DSPCN131IC152A+9V_Vi_TuREGA+9V_Vi_TuCN103TOFANIC153A+5V_ViREGA+5V_ViQ157,Q158+/-7V REG+/-7VVCHANGE_1,VC