JVC-RX6040B-avr-sm 维修电路原理图.pdf
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1、SERVICE MANUALCOPYRIGHT 2004 VICTOR COMPANY OF JAPAN, LIMITEDNo.MB1592004/2AUDIO/VIDEO CONTROL RECEIVERMB15920042RX-6040BTABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32S
2、PECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-53DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-64AD
3、JUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-145TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4、. 1-15 Area suffixJ - U.S.A.C - CanadaTA/NEWS/INFODISPLAY MODERadioFans.CN 收音机爱 好者资料库1-2 (No.MB159)SPECIFICATIONDesigns and specifications are subject to change without notice.AmplifierOutput PowerAt Stereo operationFront channels100 W per channel, min. RMS, driven into 8 , 40 Hz to 20 kHz with no m
5、ore than0.8% total harmonic distortion.At Surround operationFront channels100 W per channel, min. RMS, driven into 8 , at 1 kHz with no more than 0.8% totalharmonic distortion.Center channel100 W, min. RMS, driven into 8 , at 1 kHz with no more than 0.8% total harmonicdistortion.Surround channels 10
6、0 W per channel, min. RMS, driven into 8 , at 1 kHz with no more than 0.8% totalharmonic distortion.AudioAudio Input Sensitivity/Impedance (1 kHz) CD, TAPE/CDR, VCR, TV SOUND, DVD:220 mV/47 kAudio Input (DIGITAL IN)*CoaxialDIGITAL 1 (DVD):0.5 V(p-p)/75 OpticalDIGITAL 2 (CD), DIGITAL 3 (TV):-21 dBm t
7、o -15 dBm (660 nm 30 nm)* Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency-32 kHz, 44.1 kHz, 48 kHz)Recording Output LevelTAPE/CDR, VCR:220 mVSignal-to-Noise Ratio (66 IHF/78 IHF)CD, TAPE/CDR, VCR, TV SOUND, DVD:87 dB/74 dBFrequency Response (8 )CD, TAPE/
8、CDR, VCR, TV SOUND, DVD:20 Hz to 50 kHz (+1 dB, -3 dB)Bass Boost+3 dB 1 dB at 100 HzEqualization (5 bands) 63 Hz, 250 Hz, 1 kHz, 4 kHz, 16 kHz:8 dB (in 2 dB steps)VideoVideo Input Sensitivity/ImpedanceComposite video:DVD, VCR1 V(p-p)/75 S-video:DVD, VCR(Y: luminance):1 V(p-p)/75 (C: chrominance, bur
9、st):0.286 V(p-p)/75 ComponentDVD, VCR(Y: luminance):1 V(p-p)/75 (PB, PR):0.7 V(p-p)/75 Video Output LevelComposite video:VCR, MONITOR OUT 1 V(p-p)/75 S-video:VCR, MONITOR OUT(Y: luminance):1 V(p-p)/75 :0.286 V(p-p)/75 (C: chrominance, burst)ComponentMONITOR OUT(Y: luminance):1 V(p-p)/75 (PB, PR)0.7
10、V(p-p)/75 SynchronizationNegativeSignal-to-Noise Ratio45 dBFM tuner (IHF)Tuning Range87.5 MHz to 108.0 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 1 kHzAM tunerTuning Ra
11、nge530 kHz to 1 710 kHzGeneralPower RequirementsAC 120V , 60 HzPower Consumption180 W/230 VA (at operation), 2 W (in standby mode)Dimensions (W H D)435 mm 146.5 mm 409.5 mm (17 3/16 in. 5 13/16 in. 16 1/8 in.)Mass8.8 kg (19.5 lbs)RadioFans.CN 收音机爱 好者资料库(No.MB159)1-3SECTION 1PRECAUTION1.1Safety Preca
12、utions(1) This design of this product contains special hardware andmany circuits and components specially for safetypurposes. For continued protection, no changes should bemade to the original design unless authorized in writing bythe manufacturer. Replacement parts must be identical tothose used in
13、 the original circuits. Services should beperformed 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 furth
14、er relieve themanufacture of responsibility for personal injury or propertydamage resulting therefrom.(3) Many electrical and mechanical parts in the products havespecial safety-related characteristics. Thesecharacteristics are often not evident from visual inspectionnor can the protection afforded
15、by them necessarily beobtained by using replacement components rated forhigher voltage, wattage, etc. Replacement parts whichhave these special safety characteristics are identified inthe Parts List of Service Manual. Electrical componentshaving such features are identified by shading on theschemati
16、cs and by ( ) on the Parts List in the ServiceManual. The use of a substitute replacement which doesnot have the same safety characteristics as therecommended replacement parts shown in the Parts List ofService Manual may create shock, fire, or other hazards.(4) The leads in the products are routed
17、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 c
18、onfirmedthat they have been returned to normal, afterreassembling.(5) Leakage shock hazard testingAfter reassembling the product, always perform anisolation check on the exposed metal parts of the product(antenna terminals, knobs, metal cabinet, screw heads,headphone jack, control shafts, etc.) to b
19、e 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,particularly any
20、 exposed metal part having a return pathto the chassis, to a known good earth ground. Anyleakage current 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. C
21、onnect a 1,500 10W resistorparalleled by a 0.15F AC-type capacitor between anexposed 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 returnpa
22、th 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 i
23、nternational 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
24、 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 ofpreforming repair of this system.1.4Critical parts for safetyIn regard with component parts appearing
25、 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
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