RCA-RP7930B-pr-sm 维修电路原理图.pdf

5-1RP-7930B VOLTAGE CHARTRadioFans.CN 收音机爱 好者资料库5-2RP-7930B VOLTAGE CHARTRadioFans.CN 收音机爱 好者资料库RP7930BAPRIL/01RP7930BAudio/CommunicationLatinAmericaAfterSalesIndianapolis, IN 46290 U.S.A.SERVICE DATA INDEXUSE ISOLATION TRANSFORMER WHEN SERVICINGSAFETY NOTICEComponentshavingspecialsafetycharacteristicsareidentifiedbya( )onschematicsandonthepartslistinthisServiceDataanditsbulletins.Before servicing this instrument, it is important that the service technician read and follow the Safety Precautions in the Basic Service Data.RP7930BBasic Service DataFirstEdition-FirstPrintingCopyright 2001 - Thomson Multimedia, Inc.Printed in U.S.A. - Trademark(s)Registered - Marca(s) Registrada(s)PageNumberGeneralInformation/SafetyPrecautions.1-2Disassembly .2-1Alignments.3-1Troubleshooting Guides .4-1TroubleAids(Waveforms,Voltage,TimingCharts).5-1Replacement Partslist .6-1ExplodedViews .7-1BlockDiagrams.8-1SchematicDiagrams .9-1Circuit Boards.10-1CAUTION: ModificationorrepairofthisunitbyunauthorizedpersonsisadirectviolationofFCCRulesPart68.216andcouldresult in risk of electric shock. You are urged to contact a qualified factory authorized service facility for repairs.3-1RP-7930B ALIGNMENTS3-2RP-7930B ALIGNMENTS3-3RP-7930B ALIGNMENTS3-4RP-7930B ALIGNMENTS3-5RP-7930B ALIGNMENTS3-6RP-7930B ALIGNMENTS8-7BLOCK DIAGRAM RP-7930B1-3RP-7930B SPECIFICATIONS1-4RP-7930B SPECIFICATIONSCABINET AND CHASSIS ASSEMBLY7-18-1RP-7930B IC LEAD IDENTIFICATION8-2RP-7930B IC LEAD IDENTIFICATIONS8-3RP-7930B IC LEAD IDENTIFICATIONS?8-4RP-7930B IC LEAD IDENTIFICATIONS8-5RP-7930B IC LEAD IDENTIFICATIONS8-6RP-7930B IC LEAD IDENTIFICATIONSSAFETY PRECAUTIONS1. Before returning the instrument to the customer, alwaysmake a safety check of the entire instrument, including, but notlimited to, the following items:a. Be sure that no built-in protective devices are defective and/or have been defeated during servicing. (1) Protectiveshields are provided on this instrument to protect both thetechnician and the customer. Correctly replace all missingprotective shields, including any removed for servicingconvenience. (2) When reassembling the instrument, besure to put back in place all protective devices, including, butnot limited to, nonmetallic control knobs, insulating fishpapers,adjustment and compartment covers/shields, and isolationresistor/capacitor networks. Do not operate this instrumentor permit it to be operated without all protective devicescorrectly installed and functioning. Servicers who defeatsafety features or fail to perform safety checks may beliable for any resulting damage, and may exposethemselves and others to possible injury.b. Be sure that there are no cabinet openings through which anadult or child might be able to insert their fingers and contacta hazardous voltage. Such openings include, but are notlimited to, (1) excessively wide cabinet ventilation slots, and(2) improperly fitted and/or incorrectly secured cabinet covers.c. Leakage Cold Check - With the instrument AC plug removedfrom any AC source, connect an electrical jumper across thetwo AC plug prongs. Place the instrument AC switch in theon position. Connect one lead of an ohmmeter to the AC plugprongs tied together and touch the other ohmmeter lead inturn to each push button/customer control, exposed metalscrews, metallized overlays and to each cable connector. Ifthe measured resistance is less than 1.0 megohm or greaterthan 5.2 megohm an abnormality exists that must be correctedbefore the instrument is returned to the customer. Repeatthis test with the AC switch in the off position.d. Leakage Current Hot CheckOn completely assembled instrument, plug the AC line corddirectly into a 120V AC outlet. (Do not use an isolationtransformer during this test.) Use a leakage current tester ora metering system that complies with American NationalStandards Institute (ANSI) C101.1 Leakage Current forAppliances and Underwriters Laboratories (UL) 1492 (Section67). Measure for current from a known earth ground (metalwaterpipe, conduit, etc.) to all exposed metal or conductiveparts of the instrument (antenna connections, handle bracket,metal cabinet, screwheads, metallic overlays, push-buttons,control shafts, etc.), especially any exposed metal parts thatoffer an electrical return path to the chassis. Any currentmeasured must not exceed 0.5 milliamp. Reverse theinstrument power cord plug in the outlet and repeat the test.ANY MEASUREMENTS NOT WITHIN THE LIMITSSPECIFIED HEREIN INDICATE A POTENTIAL SHOCKHAZARD THAT MUST BE ELIMINATED BEFORERETURNING THE INSTRUMENT TO THE CUSTOMER ORBEFORE CONNECTING TO ANTENNA ORACCESSORIES.e. Interconnected Equipment AC Leakage TestAvoid shock hazards. The instrument, accessory, or cable(s)to which this instrument is connected should have theapplicable sections of the leakage resistance cold check andthe leakage current hot check performed. Do not connectthis instrument to an antenna, cable or accessory thatexhibits excessive leakage currents.2. Read and comply with all caution and safety-related notes on orinside the instrument cabinet, and on the chassis.3. Design Alteration Warning - Do not alter or add to the mechanicalor electrical design of this instrument. Design alterations andadditions, including, but not limited to, circuit modifications andthe addition of items such as auxiliary audio output connections,cables and accessories, etc., might alter the safety characteristicsof this instrument and create a hazard to the user. Any designalterations or additions will void the manufacturers warranty andwill make you, the servicer responsible for personal injury orproperty damage resulting therefrom.4. Observe original lead dress. Take extra care to assure correctlead dress in the following areas: (a) near sharp edges, (b) nearthermally hot parts - be sure that leads and components do nottouch thermally hot parts, and (c) the AC supply. Always inspectin all areas for pinched, out-of-place, or frayed wiring. Do notchange spacing between components and the printed-circuitboard. Check AC power cord for damage.5. Components, parts and/or wiring that appear to have overheatedor are otherwise damaged should be replaced with components,parts or wiring that meet original specifications. Additionally,determine the cause of overheating and/or damage and, ifnecessary, take corrective action to remove any potential safetyhazard.6. PRODUCT SAFETY NOTICE - Many electrical and mechanicalparts have special safety-related characteristics, some of whichare often not evident from visual inspection, nor can the protectionthey give be obtained by replacing them with components ratedfor higher voltage, wattage, etc. Parts that have special safetycharacteristics are identified in this service data by a ( ! ) onschematics and in the parts list. Use of a substitute replacementthat does not have the same safety characteristics as therecommended replacement part in this service data parts listmight create shock, fire and/or other hazards. Product Safety isunder review continuously and new instructions are issuedwhenever appropriate. For the latest information, always consultthe appropriate current service literature.1-2?RP-7930B SPECIFICATIONS?RP-7930B SPECIFICATIONS4-1RP-7930B TROUBLESHOOTING GUIDES4-2RP-7930B TROUBLESHOOTING GUIDESBEFORE REPLACING PARTS, READ THE FOLLOWING:REPLACEMENT PARTSWarranty Status of Assemblies and Parts - All assemblies and components shown in this part list are eligible for warranty exchange or replacement except those with a dot shown to the left of the Description. Assemblies and components with a dot to the left of the Description are NOT eligible for warranty exchange or replacement.Warranty replacement of cabinet parts requires the approval of a Thomson Consumer Electronics Field Service Manager.Warranty Status and Specifications of assemblies and components are subject to change without notice. Consult the TCE Parts Pricing Microfiche for the latest warranty status information.Approved Substitute Stock Numbers - Before ordering stock numbers in the part list, look for an approved substitute stock number in the current Price Schedule. This will minimize your service time and avoid ordering parts you already have in stock.NOTE: When ordering components that are listed more than once in this part list, always adhere to the serial number application guidelines given in the description column. If a serial number application guideline is not given, always select the component with a value, rating, other specification or identification marking(s) that match those of the corresponding component in the instrument you are servicing.PRODUCT SAFETY NOTE: Components marked with a critical safety symbol have special characteristics important to safety. Before replacing any of these components, carefully read the PRODUCT SAFETY NOTICE in the basic service data. Do not degrade the safety of the set through improper servicing. Although assemblies as a whole may not be marked with a critical safety symbol , replacement of assemblies with other assemblies not approved may result in a safety hazard.6-1March2000RP7930BCritical Safety SymbolNot Eligible For WarrantyStockSymbolDescriptionDrawingSymbolStockDescriptionDrawingRP-7930BCABINET & CHASSIS16A26787LENS, CASSETTE DOOR43-07930-0229A26788DOOR, CASSETTE66-07930-0233A26789SPRING, CASSETTE DOOR36-07930-0046A28734LENS, DISPLAY CD43-07930-01589A26791GRILLE, NET R41-07930-01645A26792FOOT, RUBBER81-00088-00H798A26793PANEL, FRONT60-07930-011443A28737BUTTON, R CD53-07931-011543A28736BUTTON, L CD53-07931-001789A26799GRILLE, NET L41-07930-001843A25141KNOB, TUNING51-00088-003443A28735KEY, CASSETTE COMMAND53-07930-01403A28739SPRING, BATTERY TERMINAL74-13244-00B4298A26800CABINET, REAR61-07930-01459A25146DOOR, BATTERY58-00088-004638A25143SPRING, BATTERY74-13244-01A4843A26802KNOB, SLIDE52-00088-00509A30713COVER, HANDLE57-07930-025178A26803HANDLE57-07930-015543A25134BUTTON, BASS BOOST53-00088-025643A25150KNOB, ROTARY VOLUME51-00088-02662A28743PLATE, CLAMPER39-07930-06672A25164HOLDER, CLAMPER55-00141-01682A28744CLAMPER55-09019-01A6960A26917FELT68-00023-00702A28745MAGNET97-09019-00729A26811DOOR, CD66-07930-017343A25160BUTTON, EJECT CD53-00088-03743A28738SPRING, CD DOOR OPEN36-00088-01D783A26814SPRING, CD DOOR36-07930-01COR66A21431CORD, AC/POWER30-00030-00GMEC73A28740MECHANISM, CD ASY00-00231-01CASSETTE MECHANISM45A26780REEL, TAKEUP ASY00353030155A26781REEL, SUPPLY ASY00353003172A25203GEAR FF00011007082A26782ARM, RS000110069311A25204ROLLER ARM ASY002328301342A26783ARM, RF ASY011120301361A25205BELT, FLYWHEEL011135015372A25206FLYWHEEL, ASY009036301381A25207BELT, MAIN009064085406A25208PULLEY005036003482A25209SLIDER, E0300140024939A25210SWITCH, MAIN0204281005172A22523MOTOREG-530AD-9B5262A25211HEAD R/PYB-BS0951CAS62A25137CASSETTE MECHANISM94-10200-02ELECTRICAL COMPONENTSANT82A26821ANTENNA, ROD23-07930-00CF10136A25175FILTER09-50107-20TCF10236A25176FILTER09-00455-01TD101EA16X0878DIODE 1N414802-04148-00D102EA16X0878DIODE 1N414802-04148-00D10316A11218DIODE FV-104302-01043-00D10417A25173DIODE LED02-50000-02T6-1StockSymbolDescriptionDrawingSymbolStockDescriptionDrawing6-2REPLACEMENT PARTS(Continued)March2000D201198597DIODE 1N400102-04001-00D202198597DIODE 1N400102-04001-00D203198597DIODE 1N400102-04001-00D20416A14915DIODE ZENER02-50068-00D205EA16X0878DIODE 1N414802-04148-00D206EA16X0878DIODE 1N414802-04148-00D20716A24329DIODE ZENER02-50075-00D208EA16X0878DIODE 1N414802-04148-00D801EA16X0878DIODE 1N414802-04148-00D802EA16X0878DIODE 1N414802-04148-00D807EA16X0878DIODE 1N414802-04148-00D808EA16X0878DIODE 1N414802-04148-00D810EA16X0878DIODE 1N414802-04148-00IC101EA33X9422IC AN720503-07205-00IC10233A25174IC AN702403-07024-00IC201EA33X9424IC AN731203-07312-00IC20233A25179IC TA7769P03-07769-00IC80133A26826IC KA9220B03-09220-01IC80233A26828IC KS9282B03-09282-00IC80333A26827IC KA927003-09270-00IC80433A26829IC KS57C0104-1203-57010-43IC80533A26775IC KA9258D03-09258-00J20141A25180JACK12-00035-31LCD163A26831DISPLAY LCD91-00088-03Q20115A26816TRANSISTOR 9013G01-09013-07Q20215A11215TRANSISTOR 9014C01-09014-03Q20315A26816TRANSISTOR 9013G01-09013-07Q20415A11215TRANSISTOR 9014C01-09014-03Q20515A11215TRANSISTOR 9014C01-09014-03Q20615A26815TRANSISTOR 2SD201201-02012-00Q20715A15170TRANSISTOR 9014C01-09015-03Q20815A11215TRANSISTOR 9014C01-09014-03Q20915A11215TRANSISTOR 9014C01-09014-03Q80115A10368TRANSISTOR KSA928A-Y01-00928-00Q80215A12584TRANSISTOR DTC124ES01-00124-05Q80315A25193TRANSISTOR 2SA131701-01317-00SOC8A25151SOCKET AC12-00004-09SPE95A28741SPEAKER14-03508-340SW139A26820SWITCH TACT16-10102-03SSW10139A26770SWITCH SLIDE16-10202-44LSW239A26820SWITCH TACT16-10102-03SSW20139A25182SWITCH PUSH16-10902-02LSW20239A25187SWITCH PUSH16-10202-15LSW20339A25183SWITCH SLIDE16-10603-09LSW20439A25184SWITCH SLIDE16-10203-58LSW339A26820SWITCH TACT16-10102-03SSW439A26820SWITCH TACT16-10102-03SSW539A26820SWITCH TACT16-10102-03SSW639A26820SWITCH TACT16-10102-03SSWI39A25181SWITCH MICRO CD DOOR16-10101-07HSWI39A26818SWITCH LEAF BATTERY11-00088-15ASWI39A28742SWITCH LEAF31-60350-54TRA88A25152TRANSFORMER POWER15-00088-05X80141A26776CRYSTAL04-16934-416-2