Jvc-RCST-3-SL-Service-Manual电路原理图.pdf
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 - 1-8TUNERPROGRAMFM MODEHBS EQRANDOMVOLINTROPRESET/REPEATTAPE CDSTANDBYSEARCH UPSEARCH DOWNREMOTESENSORPLAY/PAUSESTOPRANDOM INTRORC-ST3CD PORTABLE SYSTEM1-2Compact disc player Signal detection system Non-contact optical pickup(semiconductor laser)Number of channels 2 channels (stereo)Frequency response 20 Hz - 20 000 HzSignal-to-noise ratio 90 dBWow and flutter Less than measurable levelTuner FM frequency range 87.50 MHz - 108.00 MHzAM frequency range 522 kHz - 1 629 kHzAntennas Telescopic antenna for FMFerrite core antenna for AMCassette deck Track system 4-track 2-channel stereoMotor Electronic governor DCmotor for capstanHeads Hard Permalloy head forrecording/playbackMagnetic head for erasureFrequency response 80 Hz - 12 500 HzWow and flutter 0.15% (WRMS)Fast-winding time Approx. 120 sec.(C-60 cassette)General Speakers 10 cm × 2Power output 2 W per channel, min. RMS,driven into 8 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 replaced 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 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, 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 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, 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 use proper grounding in the area where repairs are being performed. 1. Ground the workbenchGround 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 yourselfUse an anti-static wrist strap 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 condition. (Refer to the text.)2. Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's 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 shocks, 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 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 (conductive sheet) or iron plate1-6Block DiagramBPF FM 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&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 Diagrams1-91-10
