Thomson-3_5027-cs-sch 维修电路原理图.pdf

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1、? ? ? ?!?#?$?% ? ?#?$? ? ?#? ? ? ?!?!? ?#? ? ?!#$%!?&?&#?(?)?#?RadioFans.CN 收音机爱 好者资料库SAFETY 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 dev

2、ices 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,

3、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 dev

4、icescorrectly 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 in

5、sert 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 a

6、n 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 c

7、able 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 instru

8、ment, 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) 14

9、92 (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

10、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 BEFORERE

11、TURNING 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 andt

12、he 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 al

13、ter 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 i

14、nstrument 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 f

15、ollowing 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.

16、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 correcti

17、ve 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

18、 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 pa

19、rts 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.1-2RadioFans.CN 收音机爱 好者资料库BEFORE REPLACING PARTS, READ THE FOLLO

20、WING: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 ar

21、e 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

22、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 stoc

23、k.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 o

24、r 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

25、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.1 - 3December199935027

26、Critical Safety SymbolNot Eligible For WarrantyStockSymbolDescriptionDrawingSymbolStockDescriptionDrawing3-5027CABINET ASYADA51075ADAPTER AC 5-1075D14750250000BEL1A34849BELT RUBBER22231033000CAB98A34856CABINET BOTTOM502100100GE01CAB98A34855CABINET TOP501100100GE01COU73A34848COUNTER (MODEL NO. M3A 13

27、0-12022101000000DEC73A34847DECK HY-9ZR-220-122010010100DOO9A34857DOOR CASSETTE521100100GE01DOO9A34858DOOR BATTERY522100100GE01FOO45A34850FOOT RUBBER36012652000HAN78A34862HANDLE551100100GE01KNO43A34860KNOB CASSETTE540003101GE01KNO43A34861KNOB ADAPTERS CASS540100100GE01LEN6A34859LENS DOOR CASS53010010

28、0GE01MIC62A34846MICROPHONE16010620300SPE95A34845SPEAKER 2 1/4 8 OHM15522530511SPR3A34853SPRING CONTACT +73000110050SPR3A34851SPRING CONTACT +/-73000110030SPR3A34852SPRING CONTACT -73000110040SPR3A34854SPRING DOOR CASS73000410010ELECTRICAL COMPONENTSD116A20346DIODE 1N581711702581700D216A34871DIODE 1N

29、60117001N6000IC133A34869IC AN665010500665000IC133A34870IC UTC711210500711201JAC8A34867JACK PHONE MONO REMOTE16503000400JAC8A34865JACK DC16501300300JAC41A26186JACK STEREO PHONE16502500100JAC8A34866JACK PHONE MONO16503000300Q1186645TRANSISTOR 2SC945P11001094557Q2186645TRANSISTOR 2SC945P11001094557SWI3

30、9A34868SWITCH PUSH17003040205VR142A34863RESISTOR VAR VOLUME12523100200VR242A34864RESISTOR VAR12621500201MISCELLANEOUSLAB4A34827LABEL POPPOP35027USEUC35027USE & CARE GUIDEUC350273-5027ATCCABINET ASYADA51075ADAPTER AC 5-1075D14750250000BEL1A34849BELT RUBBER22231033000CAB98A34856CABINET BOTTOM502100100

31、GE01CAB98A34855CABINET TOP501100100GE01COU73A34848COUNTER (MODEL NO. M3A 130-12022101000000DEC73A34847DECK HY-9ZR-220-122010010100DOO9A34858DOOR BATTERY522100100GE01DOO9A34857DOOR CASSETTE521100100GE01FOO45A34850FOOT RUBBER36012652000HAN78A34862HANDLE551100100GE01KNO43A34860KNOB CASSETTE540003101GE0

32、1KNO43A34861KNOB ADAPTERS CASS540100100GE01LEN6A34859LENS DOOR CASS530100100GE01MIC62A34846MICROPHONE16010620300SPE95A34845SPEAKER 2 1/4 8 OHM15522530511SPR3A34851SPRING CONTACT +/-730001100301 - 3StockSymbolDescriptionDrawingSymbolStockDescriptionDrawing1 - 4REPLACEMENT PARTS(Continued)December1999

33、SPR3A34854SPRING DOOR CASS73000410010SPR3A34852SPRING CONTACT -73000110040SPR3A34853SPRING CONTACT +73000110050ELECTRICAL COMPONENTSD116A20346DIODE 1N581711702581700D216A34871DIODE 1N60117001N6000IC133A34870IC UTC711210500711201IC133A34869IC AN665010500665000JAC8A34867JACK PHONE MONO REMOTE165030004

34、00JAC8A34865JACK DC16501300300JAC41A26186JACK STEREO PHONE16502500100JAC8A34866JACK PHONE MONO16503000300Q1186645TRANSISTOR 2SC945P11001094557Q2186645TRANSISTOR 2SC945P11001094557SWI39A34868SWITCH PUSH17003040205VR142A34863RESISTOR VAR VOLUME12523100200VR242A34864RESISTOR VAR12621500201MISCELLANEOUSLAB4A34827LABEL POPPOP35027USEUC35027USE & CARE GUIDEUC350271 - 4? ? ? ?