JVC-RX5032VSL-avr-sm 维修电路原理图.pdf
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1、SERVICE MANUALCOPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD.No.220382003/4AUDIO/VIDEO CONTROL RECEIVER2203820034RX-5032VSLTABLE OF CONTENTS1Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22Disassembly
2、 method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3、. 1-104Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11TA/NEWS/INFODISPLAY MODESTANDBYSTANDBY/ONPHONESD I G I T A LP R O L O G I CDIMMERINPUT DIGITALRX6030VAUDIO/VIDEO CONTROL RECEIVERINPUT ANAL
4、OGMASTER VOLUMEINPUT ATTArea SuffixE - Continental EuropeEN - Northern Europe RadioFans.CN 收音机爱 好者资料库1-2 (No.22038)SECTION 1Important Safety Precautions1.1 Safety Precautions(1) This design of this product contains special hardware andmany circuits and components specially for safety purposes.For co
5、ntinued protection, no changes should be made to theoriginal design unless authorized in writing by the man-ufacturer. Replacement parts must be identical to thoseused in the original circuits. Services should be per-formed by qualified personnel only.(2) Alterations of the design or circuitry of th
6、e 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 therefrom.(3) Many electrical and me
7、chanical 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-age, etc. Replacement parts wh
8、ich have these special safetycharacteristics are identified in the Parts List of Service Manu-al. Electrical components having such features are iden-tified by shading on the schematics and by () on theParts List in the Service Manual. The use of a substitute re-placement which does not have the sam
9、e safety character-istics as the recommended replacement parts shown in theParts List of Service Manual may create shock, fire, or oth-er 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 par
10、ts, 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 reassembling.(5) Leakage shock hazard testing)After reassem
11、bling the product, always perform an isolationcheck on the exposed metal parts of the product (antennaterminals, knobs, metal cabinet, screw heads, headphonejack, control shafts, etc.) to be sure the product is safe tooperate without danger of electrical shock.Do not use a line isolation transformer
12、 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 ground. Any leakage cur-rent m
13、ust not exceed 0.5mA AC (r.m.s.). Alternate check methodPlug the AC line cord directly into the AC outlet. Use an ACvoltmeter having, 1,000 ohms per volt or more sensitivity inthe following manner. Connect a 1,500 ohm 10W resistorparalleled by a 0.15 F AC-type capacitor between anexposed metal part
14、and a known good earth ground.Measure the AC voltage across the resistor with the ACvoltmeter. Move the resistor connection to each exposed metal part,particularly any exposed metal part having a return path tothe chassis, and measure the AC voltage across the resistor.Now, reverse the plug in the A
15、C outlet and repeat eachmeasurement. Voltage measured any must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). 1.2 Warning(1) This equipment has been designed and manufactured tomeet international safety standards.(2) It is the legal responsibility of the repairer to ensure tha
16、tthese 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.1.3 CautionBurrs formed during m
17、olding 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.1.4 Critical parts for safetyIn regard with component parts appearing on the silk-screenprinted side (parts side) of the PWB diagrams, the parts that areprinte
18、d 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 the same typeand rating as specified by the manufacturer. (Except the JC version)RadioFans.CN 收音机爱 好者资料库(No.22038)1-3SECTION 2Dis
19、assembly method2.1 Removing the top cover (See Fig.1)(1) From the right and left sides of the main body, remove thefour screws A attaching the top cover.(2) From the back side of the main body, remove the threescrews B attaching the top cover.(3) Remove the top cover in the direction of the arrow 2
20、whileextending the lower sections of the top cover in the direc-tion of the arrow 1.Fig.12.2 Removing the front panel assembly (See Figs.2 and 3) Prior to performing the following procedure, remove the topcover.(1) Disconnect the card wire from the connector CN402 on theaudio board. (See Fig.2)(2) D
21、isconnect the card wire from the connector CN201 on thepower supply board. (See Fig.2)(3) Remove the tie band and wire protection board fixing thecard wire. (See Fig.2)(4) Remove the tie band fixing the parallel wires, disconnectthe parallel wire from the connector CN403 on the audioboard. (See Fig.
22、2)(5) Remove the three screws C attaching the front panel as-sembly. (See Fig.2)(6) From the bottom side of the main body, remove the fourscrews D attaching the front panel assembly. (See Fig.3)(7) Remove the front panel assembly in the direction of the ar-row. (See Fig.3)Fig.2Fig.3BAA211Top coverCC
23、CFront panel assembly Card wireCN201Power supplyboardTie bandWire protectionboardCard wireCN402Audio boardCN403Tie bandDDFront panel assembly1-4 (No.22038)2.3 Removing the rear panel (See Fig.4) Prior to performing the following procedure, remove the topcover.(1) From the back side of the main body,
24、 remove the strain re-lief from the rear panel in the direction of the arrow.(2) Remove the seventeen screws E and four screws F attach-ing the rear panel.Fig.42.4 Removing the DSP board, audio input board, DVD board and video board (See Fig.5) Prior to performing the following procedure, remove the
25、 topcover and rear panel.(1) From the top side of the main body, disconnect the DSPboard from the connector CN481 on the audio board.(2) Disconnect the audio input board from the connectorCN421 on the audio board.(3) Disconnect the DVD board from the connector CN431 onthe audio board.(4) Disconnect
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