Pioneer-VSX74TXV-avr-sm 维修电路原理图.pdf

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1、 PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, JapanPIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, BelgiumPIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 1

2、59936 PIONEER CORPORATION 2005STANDBY/ON?AUDIO/VIDEO MULTI-CHANNEL RECEIVERVSX-74TXViINPUTSELECTORMASTERVOLUMEPHASE CONTROLMCACCPOSITIONAUTO SURR/STREAM DIRECTPHASE CONTROLDIGITAL PRECISIONPROCESSINGHOMETHXSTANDARDSURROUNDADVANCEDSURROUND VSX-74TXVi PROVISIONAL AUDIO/VIDEO MULTI-CHANNEL RECEIVER VSX

3、-74TXVi VSX-74TXVi-SVSX-72TXVVSX-72TXV-S THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S). ModelTypePower RequirementRemarks VSX-74TXViKUXJ/CAAC120V VSX-74TXVi-SKUXJCAC120V VSX-72TXVKUXJ/CAAC120V VSX-72TXV-SKUXJCAC120V For details, refer to Important Check Points for Good Servicing. T

4、-ZZK AUG. 2005 printed in JapanRadioFans.CN 收音机爱 好者资料库 VSX-74TXVi212341234CDFABE SAFETY INFORMATIONThis service manual is intended for qualified service technicians; it is not meant for the casualdo-it-yourselfer. Qualified technicians have the necessary test equipment and tools, and have beentraine

5、d to properly and safely repair complex products such as those covered by this manual.Improperly performed repairs can adversely affect the safety and reliability of the product and mayvoid the warranty. If you are not qualified to perform the repair of this product properly and safely, youshould no

6、t risk trying to do so and refer the repair to a qualified service technician.WARNINGThis product contains lead in solder and certain electrical parts contain chemicals which are known to the state of California tocause cancer, birth defects or other reproductive harm. Health & Safety Code Section 2

7、5249.6 Proposition 65NOTICE(FOR CANADIAN MODEL ONLY)Fuse symbols (fast operating fuse) and/or (slow operating fuse) on PCB indicate that replacementparts must be of identical designation.REMARQUE(POUR MODLE CANADIEN SEULEMENT)Les symboles de fusible (fusible de type rapide) et/ou (fusible de type le

8、nt) sur CCI indiquent queles pices de remplacement doivent avoir la mme dsignation.ANY MEASUREMENTS NOT WITHIN THELIMITS OUTLINED ABOVE ARE INDICATIVEOF A POTENTIAL SHOCK HAZARD ANDMUST BE CORRECTED BEFORE RETURN-ING THE APPLIANCE TO THE CUSTOMER.2. PRODUCT SAFETY NOTICEMany electrical and mechanica

9、l parts in the appliancehave special safety related characteristics. These areoften not evident from visual inspection nor theprotection afforded by them necessarily can be obtainedby using replacement components rated for voltage,wattage, etc. Replacement parts which have thesespecial safety charac

10、teristics are identified in thisService Manual.Electrical components having such features areidentified by marking with a on the schematics andon the parts list in this Service Manual.The use of a substitute replacement component whichdoes not have the same safety characteristics as thePIONEER recom

11、mended replacement one, shown in theparts list in this Service Manual, may create shock, fire,or other hazards.Product Safety is continuously under review and newinstructions are issued from time to time. For the latestinformation, always consult the current PIONEERService Manual. A subscription to,

12、 or additional copiesof, PIONEER Service Manual may be obtained at anominal charge from PIONEER.(FOR USA MODEL ONLY)1. SAFETY PRECAUTIONSThe following check should be performed for thecontinued protection of the customer and servicetechnician.LEAKAGE CURRENT CHECKMeasure leakage current to a known e

13、arth ground(water pipe, conduit, etc.) by connecting a leakagecurrent tester such as Simpson Model 229-2 orequivalent between the earth ground and all exposedmetal parts of the appliance (input/output terminals,screwheads, metal overlays, control shaft, etc.). Plugthe AC line cord of the appliance d

14、irectly into a 120VAC 60 Hz outlet and turn the AC power switch on. Anycurrent measured must not exceed 0.5 mA.DeviceundertestLeakagecurrenttesterEarthgroundReading shouldnot be above0.5 mAAlso test withplug reversed(Using AC adapterplug as required)Test allexposed metalsurfacesAC Leakage TestRadioF

15、ans.CN 收音机爱 好者资料库 VSX-74TXVi356785678CDFABEImportant Check Points for Good ServicingIn this manual, procedures that must be performed during repairs are marked with the below symbol.Please be sure to confirm and follow these procedures.1. Product safetyPlease conform to product regulations (such as

16、safety and radiation regulations), and maintain a safe servicing environment by following the safety instructions described in this manual.1 Use specified parts for repair.Use genuine parts. Be sure to use important parts for safety.2 Do not perform modifications without proper instructions.Please f

17、ollow the specified safety methods when modification(addition/change of parts) is required due to interferences such as radio/TV interference and foreign noise.3 Make sure the soldering of repaired locations is properly performed.When you solder while repairing, please be sure that there are no cold

18、 solder and other debris.Soldering should be finished with the proper quantity. (Refer to the example)4 Make sure the screws are tightly fastened.Please be sure that all screws are fastened, and that there are no loose screws.5 Make sure each connectors are correctly inserted.Please be sure that all

19、 connectors are inserted, and that there are no imperfect insertion.6 Make sure the wiring cables are set to their original state.Please replace the wiring and cables to the original state after repairs.In addition, be sure that there are no pinched wires, etc.7 Make sure screws and soldering scraps

20、 do not remain inside the product.Please check that neither solder debris nor screws remain inside the product.8 There should be no semi-broken wires, scratches, melting, etc. on the coating of the power cord.Damaged power cords may lead to fire accidents, so please be sure that there are no damages

21、.If you find a damaged power cord, please exchange it with a suitable one.9 There should be no spark traces or similar marks on the power plug.When spark traces or similar marks are found on the power supply plug, please check the connection and advise on secure connections and suitable usage. Pleas

22、e exchange the power cord if necessary.0 Safe environment should be secured during servicing.When you perform repairs, please pay attention to static electricity, furniture, household articles, etc. in order to prevent injuries. Please pay attention to your surroundings and repair safely. 2. Adjustm

23、entsTo keep the original performance of the products, optimum adjustments and confirmation of characteristics within specification.Adjustments should be performed in accordance with the procedures/instructions described in this manual.4. CleaningFor parts that require cleaning, such as optical picku

24、ps, tape deck heads, lenses and mirrors used in projection monitors, proper cleaning should be performed to restore their performances.3. Lubricants, Glues, and Replacement partsUse grease and adhesives that are equal to the specified substance. Make sure the proper amount is applied.5. Shipping mod

25、e and Shipping screwsTo protect products from damages or failures during transit, the shipping mode should be set or the shipping screws should be installed before shipment. Please be sure to follow this method especially if it is specified in this manual. VSX-74TXVi412341234CDFABE CONTENTS SAFETY I

26、NFORMATION.21. SPECIFICATIONS .62. EXPLODED VIEWS AND PARTS LIST.82.1 PACKING .82.2 EXTERIOR.102.3 CHASSIS SECTION .122.4 REAR PANEL SECTION.142.5 POWER AMP BLOCK.162.6 FRONT PANEL SECTION .183. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM.203.1 BLOCK DIAGRAM.203.1.1 OVERALL BLOCK DIAGRAM .203.1.2 COMPOSITE

27、V BLOCK DIAGRAM.223.1.3 S-VIDEO BLOCK DIAGRAM.233.1.4 COMPONENT &VOL BLOCK DIAGRAM.243.1.5 DSP BLOCK DIAGRAM .253.1.6 HDMI & DVC BLOCK DIAGRAM.263.1.7 MICROCOMPUTER BLOCK DIAGRAM .273.2 OVERALL WIRING CONNECTION DIAGRAM.283.3 AUDIO & MULTI CH IN ASSY.303.4 V-AUDIO ASSY.323.5 FRONT-IN and HEADPHONE A

28、SSYS.343.6 BRIDGE1, BRIDGE2, TRANS SIDE and BRIDGE3 ASSYS .363.7 COMPOSITE V ASSY.383.8 S-VIDEO ASSY.403.9 COMPONENT & VOL ASSY (1/4) .423.10 COMPONENT & VOL ASSY (2/4) .443.11 COMPONENT & VOL ASSY (3/4) .463.12 COMPONENT & VOL ASSY (4/4) .483.13 DIGITAL MOTHER ASSY (1/8).503.14 DIGITAL MOTHER ASSY

29、(2/8).523.15 DIGITAL MOTHER ASSY (3/8).543.16 DIGITAL MOTHER ASSY (4/8).563.17 DIGITAL MOTHER ASSY (5/8).583.18 DIGITAL MOTHER ASSY (6/8).603.19 DIGITAL MOTHER ASSY (7/8).623.20 DIGITAL MOTHER ASSY (8/8).643.21 DSP ASSY (1/2).663.22 DSP ASSY (2/2).683.23 INTERFACE ASSY .703.24 POWER AMP IN and POWER

30、 PROTECT ASSYS.723.25 POWER AMP L ASSY.743.26 POWER AMP R ASSY.763.27 LOCAL SUPPLY and DC/DC ASSYS.783.28 TRANS2-1, VH-TR, DIODE and SP/PS ASSYS.803.29 TRANS2-2, TRANS1 and PRIMARY ASSYS.823.30 VOLUME, DISPLAY and INPUT SELECT ASSYS.843.31 PREOUT & CONTROL ASSY.863.32 1394 ASSY (1/2).883.33 1394 ASS

31、Y (2/2).903.34 HDMI&DVC ASSY (1/2).923.35 HDMI&DVC ASSY (2/2).944. PCB CONNECTION DIAGRAM .964.1 PRIOUT&CONTROL ASSY.974.2 AUDIO&MULTI CH IN ASSY.984.3 V-AUDIO ASSY.994.4 HEAD PHONE and FRONT-IN ASSYS.1004.5 BRIDGE1 and BRIDGE2 ASSYS .1014.6 TRANS SIDE and BRIDGE3 ASSYs .1024.7 COMPOSITE V ASSYS .10

32、44.8 S-VIDEO ASSY.1054.9 COMPONENT&VOL ASSY.1064.10 DIGITAL MOTHER ASSY .1104.11 DSP ASSY.1144.12 INTERFACE ASSY .116 VSX-74TXVi556785678CDFABE 4.13 POWER AMP IN ASSY .1204.14 POWER PROTECT ASSY.1214.15 POWER AMP L and POWER AMP R ASSYS.1224.16 LOCAL SUPPLY and DC/DC ASSYS.1264.17 TRANS2-1, VH TR, D

33、IODE and TRANS2-2 ASSYS .1284.18 SP/PS ASSY.1304.19 TRANS1 and PRIMARY ASSYS .1324.20 VOLUME, DISPLAY and INPUT SELECT ASSYS.1344.21 HDMI&DVC ASSY.1384.22 1394 ASSY.1405. PCB PARTS LIST.1416. ADJUSTMENT .1887. GENERAL INFORMATION .1897.1 DIAGNOSIS.1897.1.1 TEST MODE.1897.1.2 PROTECTION CIRCUIT SPECI

34、FICATION.1937.1.3 TROUBLESHOOTING THE DSP BLOCK.1957.1.4 DIAGNOSIS OF THE HDMI BLOCK AND RELATED SYSTEMS.2037.1.5 FLOWCHART OF CONNECTION DIAGNOSIS OF THE HDMI BLOCK .2167.1.6 DIAGNOSIS OF THE 1394 ASSY.2197.1.7 iPod INFORMATION.2247.1.8 XM RADIO INFORMATION.2267.1.9 HOW TO REWRITE THE DSP FLASH ROM

35、 BY PLAYING BACK A CD.2277.1.10 HOW TO REWRITE THE FLASH ROMS FOR VARIOUS MICROCOMPUTERS.2307.1.11 DISASSEMBLY .2337.1.12 FAILURE DIAGNOSIS OF THE POWER AMP BLOCK.2427.2 PARTS .2437.2.1 IC.2438. PANEL FACILITIES .275 VSX-74TXVi612341234CDFABE 1. SPECIFICATIONSpossible modifications without notice, d

36、ue toOutput Claims for Amplifiers5 Hz to 100,000 Hz 180 W + 180 W (74TXVi)140 W + 140 W (74TXVi)SpecificationsAmplifier sectionContinuous average power output of 140 (or 130) watts* per channel, min., at 8 ohms, from 20 Hz to 20,000 Hz with no more than 0.09%* total harmonic distortion (front).Conti

37、nuous Power Output (20Hz-20kHz, 8, 0.09%)Front . . . . . . . . . . . . . . . . 130 W + 130 W (72TXV)Center . . . . . . . . 130 W (72TXV), 140 W (74TXVi)Surround . . . . . . . . . . . . . 130 W + 130 W (72TXV)140 W + 140 W (74TXVi)Surround back . . . . . . . . 130 W + 130 W (72TXV)140 W + 140 W (74TX

38、Vi)Continuous Power Output (1 kHz, 6 , 1.0%)Front . . . . . . . . . . . . . . . . 160 W + 160 W (72TXV)Center . . . . . . . . 160 W (72TXV), 180 W (74TXVi)Surround . . . . . . . . . . . . . 160 W + 160 W (72TXV)180 W + 180 W (74TXVi)Surround back . . . . . . . . 160 W + 160 W (72TXV)180 W + 180 W (7

39、4TXVi)Total harmonic distortion . . . . . . . . . . . . . . . 0.05%(20 Hz-20 kHz, 120 W, 8 ) (72TXV)(20 Hz-20 kHz, 130 W, 8 ) (74TXVi)Audio SectionInput (Sensitivity/Impedance)LINE . . . . . . . . . . . . . . . . . . . . . 335 mV/47 kFrequency Response (LINE) . . . . . . . . . . . . . . . . . dBOutp

40、ut (Level/Impedance)REC . . . . . . . . . . . . . . . . . . . . . 335 mV/2.2 kTone ControlBASS . . . . . . . . . . . . . . . . . . . 6 dB (100 Hz)TREBLE . . . . . . . . . . . . . . . . . 6 dB (10 kHz)LOUDNESS . . . . . . +4/+2 dB (100Hz/10 kHz)(at volume position -40 dB)Signal-to-Noise Ratio (IHF, s

41、hort circuited, A network)LINE . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 dBSignal-to-Noise Ratio EIA, at 1W (1kHz)LINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 dB* Measured pursuant to the Federal TradeCommissions Trade Regulation rule on Power * Measured by Audio S

42、pectrum AnalyzerComposite Video / S-Video SectionInput (Sensitivity/Impedance) . . . . . . 1 Vp-p/75 Output (Level/Impedance) . . . . . . . . . 1 Vp-p/75 Signal-to-Noise Ratio . . . . . . . . . . . . . . . . . . 65 dBFrequency Response . . . . . . . . . . 5 Hz to 10 MHzComponent Video SectionInput (

43、Sensitivity/Impedance) . . . . . . . 1 Vp-p/75 Output (Level/Impedance) . . . . . . . . . 1 Vp-p/75 Signal-to-Noise Ratio . . . . . . . . . . . . . . . . . . 65 dBFrequency Response . . . . . . . . . 5 Hz to 100 MHzFM Tuner SectionFrequency Range . . . . . . . . 87.5 MHz to 108 MHzUsable Sensitivity

44、 . . . . . . . . . . . . . . . . . . . . . . . . . . Mono: 13.2 dBf, IHF (1.3 V/75 )50 dB Quieting Sensitivity . . . . . . . Mono: 20.2 dBfStereo: 38.6 dBfSignal-to-Noise Ratio . . . . Mono: 73 dB (at 85 dBf)Stereo: 70 dB (at 85 dBf)Distortion . . . . . . . . . . . . . . . . Stereo: 0.5% (1 kHz)Alte

45、rnate Channel Selectivity . . . . 60 dB (400 kHz)Stereo Separation . . . . . . . . . . . . . . 40 dB (1 kHz)Frequency Response . . . . 30 Hz to 15 kHz 1dBAntenna Input . . . . . . . . . . . . . . . 75 unbalancedAM Tuner SectionFrequency Range . . . . . . . . 530 kHz to 1,700 kHzSensitivity (IHF, Loo

46、p antenna) . . . . . . . 350 V/mSelectivity . . . . . . . . . . . . . . . . . . . . . . . . . . 25 dBSignal-to-Noise Ratio . . . . . . . . . . . . . . . . . . 50 dBAntenna . . . . . . . . . . . . . . . . . . . . . . Loop antennaMiscellaneousPower Requirements . . . . . . . . . . AC 120 V, 60 HzPower

47、 Consumption . . . . . . . . . . . 530 W, 690 VAIn standby . . . . . . . . . . . . . . . . . Less than 0.6 WAC Outlet . . . . . . . . . . . . . (switched) 100 W MAX.Dimensions . . . . . 420 (W) x 187 (H) x 462 (D) mm(169/16 (W) x 73/8(H) x 181/4(D)in.)Weight (without package) . . . . . . . . . . . .

48、 . . . . . . . .16.0 kg (35.3 lb) (74TXVi)15.9 kg (35.1 lb) (72TXV)Furnished PartsSetup microphone (for Auto MCACC setup) . . . . 1AA/IEC R6P dry cell batteries . . . . . . . . . . . . . . . 2Remote control unit . . . . . . . . . . . . . . . . . . . . . . . 1AM loop antenna . . . . . . . . . . . . .

49、 . . . . . . . . . . . .1FM wire antenna . . . . . . . . . . . . . . . . . . . . . . . . . 1Audio control cable for iPod . . . . . . . . . . . . . . . . 1Warranty card . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Operating instructions Note?Specifications and the design are subject to impr

50、ovements.Cleaning the unit?Use a polishing cloth or dry cloth to wipe off dust and dirt.?When the surface is dirty, wipe with a soft cloth dipped in some neutral cleanser diluted five or six times with water, and wrung out well, and again with a dry cloth. Do not use furniture wax or then wipe clean