JVC-RX5040B-avr-sm 维修电路原理图.pdf
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1、SERVICE MANUALCOPYRIGHT 2004 Victor Company of Japan, LimitedNo.MB2692004/6AUDIO/VIDEO CONTROL RECEIVERMB26920046RX-5040BTABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32S
2、PECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-43DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-54AD
3、JUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-125TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4、. 1-13Area suffixUJ - U.S.MilitaryRadioFans.CN 收音机爱 好者资料库1-2 (No.MB269)SPECIFICATION*1: Measured on AC 110 V, 127 V, 220 V, and 240 V*2: Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency -32 kHz, 44.1 kHz, 48 kHz)Designs and specifications are subject to c
5、hange without notice.AmplifierOutput Power At Stereo operationFront channels100 W*1 per channel, min. RMS, driven into 8 , at 1 kHz with no more than 0.8% total harmonic distortion (IEC268-3/DIN).At Surround operationFront channels100 W per channel, min. RMS, driven into 8 , at 1 kHz with no more th
6、an 0.8% total harmonic distortion.Center channel100 W, min. RMS, driven into 8 , at 1 kHz with no more than 0.8% total harmonic distortion.Surround channels 100 W per channel, min. RMS, driven into 8 , at 1 kHz with no more than 0.8% total harmonic distortion.AudioAudio Input Sensitivity/Im-pedance
7、(1 kHz)CD, TAPE/CDR, VCR, TV SOUND, DVD:220 mV/47 kAudio Input (DIGITAL IN)*2 CoaxialDIGITAL 1 (DVD):0.5 V(p-p)/75 Audio Input Sensitivity/Im-pedance (1 kHz)OpticalDIGITAL 2 (CD):-21 dBm to -15 dBm (660 nm 30 nm)Recording Output LevelTAPE/CDR, VCR:220 mVSignal-to-Noise Ratio(66 IHF/DIN)CD, TAPE/CDR,
8、 VCR, TV SOUND, DVD:87 dB/62 dBFrequency Response (8 ) CD, TAPE/CDR, VCR, TV SOUND, DVD:20 Hz to 50 kHz (+1 dB, -3 dB)Equalization (5 bands)63 Hz, 250 Hz, 1 kHz, 4 kHz, 16 kHz:8 dB (in 2 dB steps)VideoVideo Input Sensitivity/Im-pedanceComposite videoDVD, VCR:1 V(p-p)/75 Video Output LevelComposite v
9、ideoVCR, MONITOR OUT:1 V(p-p)/75 SynchronizationNegativeSignal-to-Noise Ratio45 dBFM tuner (IHF)Tuning Range87.50 MHz to 108.00 MHzUsable SensitivityMonaural: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 OUT (REC)35 dB at
10、1 kHzAM tunerTuning Range531 kHz to 1 602 kHz (at 9 kHz intervals)530 kHz to 1 600 kHz (at 10 kHz intervals)GeneralPower RequirementsAC 110 V/127 V/220 V/230 V - 240 V , adjustable with the voltage selector, 50 Hz/60 HzPower Consumption210 W (at operation) 4.5 W (in standby mode)Dimensions (W H D)43
11、5 mm 146.5 mm 369.5 mmMass8.0 kgRadioFans.CN 收音机爱 好者资料库(No.MB269)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 des
12、ign 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
13、 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 characte
14、ristics. 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
15、 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
16、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
17、 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 me
18、tal 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 outle
19、t. 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
20、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 wit
21、h 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 0.7
22、5 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
23、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 t
24、o 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 b
25、y 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
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