JVC-RCST3-cs-sch 维修电路原理图.pdf

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1、SERVICE MANUALCD PORTABLE SYSTEMNo.MB0632003/11COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD.RC-ST3SLContentsArea SuffixB - U.K.E -Contnental EuropeEN - Northern EuropeEV - Eastern EuropeSpecification -1-2Safety Precautions -1-3Preventing static electricity - 1-5Block Diagram - 1-6Schematic Diagrams -

2、 1-8TUNERPROGRAMFM MODEHBSEQRANDOMVOLINTROPRESET/REPEATTAPECDSTANDBYSEARCH UPSEARCH DOWNREMOTESENSORPLAY/PAUSESTOPRANDOMINTRORC-ST3CD PORTABLE SYSTEMRadioFans.CN 收音机爱 好者资料库SERVICE POLICYNo service parts are available for this model.Exchange only.Revised 28/9/2004 Service Policy added1-2Compact disc

3、playerSignal detection system Non-contact optical pickup(semiconductor laser)Number of channels2 channels (stereo)Frequency response20 Hz - 20 000 HzSignal-to-noise ratio90 dBWow and flutterLess than measurable levelTunerFM frequency range87.50 MHz - 108.00 MHzAM frequency range522 kHz - 1 629 kHzAn

4、tennasTelescopic antenna for FMFerrite core antenna for AMCassette deckTrack system4-track 2-channel stereoMotorElectronic governor DCmotor for capstanHeadsHard Permalloy head forrecording/playbackMagnetic head for erasureFrequency response80 Hz - 12 500 HzWow and flutter0.15% (WRMS)Fast-winding tim

5、eApprox. 120 sec.(C-60 cassette)GeneralSpeakers10 cm 2Power output2 W per channel, min. RMS,driven into 8 &! at 1 kHz,with no more than 10% totalharmonic distortion(IEC 268-3)Output terminalPHONES 1, output level0 mW - 20 mW/32 ohm,matching impedance: 16ohm 32 ohm Power supplyAC 230 V , 50 HzDC 12 V

6、 (batteries R20P(SUM-1)/D (13F) 8)Power consumption19 W (operation mode)3.2 W (standby mode)Dimensions440 mm (W) 168 mm (H) 241 mm (D)MassApprox. 3.1 kg(without batteries)SpecificationRadioFans.CN 收音机爱 好者资料库1-31. This design of this product contains special hardware and many circuits and components

7、specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.2. Alterati

8、ons of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the manufacturers warranty and will further relieve the manufacture of responsibility for personal injury or property damage resul

9、ting therefrom.3. Many electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher volt

10、age, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute

11、replacement which does not have the same safety characteristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards.4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separate

12、d from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling.5.

13、 Leakage currnet check (Electrical shock hazard testing)After re-assembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate

14、without danger of electrical shock.Do not use a line isolation transformer during this check.Plug the AC line cord directly into the AC outlet. Using a Leakage Current Tester, measure the leakage current from each exposed metal parts of the cabinet, particularly any exposed metal part having a retur

15、n path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).Alternate check methodPlug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resisto

16、r paralleled by a 0.15 F AC-type capacitor between an exposed metal part and a known good earth ground.Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, a

17、nd meausre the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Voltage measured any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). 1. This equipment has been designed and manufactured to meet international safety standa

18、rds.2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.3. Repairs must be made in accordance with the relevant safety standards.4. It is essential that safety critical components are replaced by approved parts.5. If mains voltage selector is provid

19、ed, check setting for local voltage.Good earth groundPlace this probe on each exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE!Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case

20、 of preforming repair of this system.In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the mark nearby are critical for safety. (This r

21、egulation does not correspond to J and C version.)1-41. Service should be performed by qualified personnel only.2. This equipment has been designed and manufactured to meet international safety standards.3. It is the legal responsibility of the repairer to ensure that these safety standards are main

22、tained.4. Repairs must be made in accordance with the relevant safety standards.5. It is essential that safety critical components are replaced by approved parts.6. If mains voltage selector is provided, check setting for local voltage.1. This design of this product contains special hardware and man

23、y circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. 2. Any unauthorised design alterations or

24、additions will void the manufacturers guarantee ; furthermore the manufacturer cannot accept responsibility for personal injury or property damage resulting therefrom.3. Essential safety critical components are identified by ( ) on the Parts List and by shading on the schematics, and must never be r

25、eplaced by parts other than those listed in the manual. Please note however that many electrical and mechanical parts in the product have special safety related characteristics. These characteristics are often not evident from visual inspection. Parts other than specified by the manufacturer may not

26、 have the same safety characteristics as the recommended replacement parts shown in the Parts List of the Service Manual and may create shock, fire, or other hazards.4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts,

27、 high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling.!Burrs formed during

28、 molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system.(U.K only)1-5Preventing static electricityElectrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged,

29、 can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs. Grounding to prevent damage by static electricityStatic electricity in the work area can destroy the optical pickup (laser diode) in devices such as mechanism unit. Be careful to us

30、e proper grounding in the area where repairs are being performed. 1. Ground the workbench Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it.2. Ground yourself Use an anti-static wrist strap

31、 to release any static electricity built up in your body. 3. Handling the optical pickup1. In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original

32、 condition. (Refer to the text.)2. Do not use a tester to check the condition of the laser diode in the optical pickup. The testers internal power source can easily destroy the laser diode. Handling the traverse unit (optical pickup)1. Do not subject the traverse unit (optical pickup) to strong shoc

33、ks, as it is a sensitive, complex unit. 2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take

34、too long a time when attaching it to the connector. 3. Handle the flexible cable carefully as it may break when subjected to strong force. 4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it(caption)Anti-static wrist strapConductive material (conducti

35、ve sheet) or iron plate1-6Block DiagramBPFFM F/E , IF/DET/MPXAM RF/IF/DET.FM OSC.PLLIC102 LC72131LCDCD SW.TU SW.FM RFIC101 LA1823AM ANTAM OSC.TU-5VREG.R/P PRE.AMP.IC201 TA8142APR/P SW.R/P SW.R/P SW.SIGNAL SLECT SW.IC501 LC75342EQ./E. VOL.R/P HEADERASE HEADVD103TU L&R CH.REC L&R CH.P/B L&R CH.TAPE L&

36、R CH.REC L&R CH.CD L&R CH.FM ANT1-7DISCLA9242MMLAMPBASS CUTIC901(ASP.)LC78622EIC902(DSP.)MOTOR/ACTUATORIC903 LA6541DDRIVERPICKUPMSPINDLE SLEDMOTORMOTORKEY LC587008IC701(u-COM.)Q704CD DOORLEAF SW.5V REG.8V REG.IC401JOG.VOL.POWER AMP.IC301 TA8227PSW.DC SUP.Q907CASS.DECKLEAF SW.MDECKMOTORL&R CH.P-CON.RECTIFIERL. SPEAKERR. SPEAKERAC INPUT1-8Schematic Diagrams1-91-101-11(No.MB063)2003/11JVC Euorpe LimitedJVC HouseJVC Budiness Park 12 Priestley Way, London NW2 7BA United Kingdom