JVC-RCST3-cs-sch维修电路原理图.pdf

SERVICE MANUAL CD PORTABLE SYSTEM No.MB063 2003/11COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD. RC-ST3SL Contents Area Suffix B - U.K. E -Contnental Europe EN - Northern Europe EV - Eastern Europe Specification -1-2 Safety Precautions -1-3 Preventing static electricity - 1-5 Block Diagram - 1-6 Schematic Diagrams - 1-8 TUNER PROGRAM FM MODE HBSEQ RANDOM VOL INTRO PRESET/ REPEAT TAPECD STANDBY SEARCH UP SEARCH DOWN REMOTE SENSOR PLAY/PAUSE STOP RANDOMINTRO RC-ST3 CD PORTABLE SYSTEM RadioFans.CN 收音机爱 好者资料库 SERVICE POLICY No service parts are available for this model. Exchange only. Revised 28/9/2004 Service Policy added 1-2 Compact disc playerSignal detection system Non-contact optical pickup (semiconductor laser) Number of channels2 channels (stereo) Frequency response20 Hz - 20 000 Hz Signal-to-noise ratio90 dB Wow and flutterLess than measurable level TunerFM frequency range87.50 MHz - 108.00 MHz AM frequency range522 kHz - 1 629 kHz AntennasTelescopic antenna for FM Ferrite core antenna for AM Cassette deckTrack system4-track 2-channel stereo MotorElectronic governor DC motor for capstan HeadsHard Permalloy head for recording/playback Magnetic head for erasure Frequency response80 Hz - 12 500 Hz Wow and flutter0.15% (WRMS) Fast-winding timeApprox. 120 sec. (C-60 cassette) GeneralSpeakers10 cm 2 Power output2 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) 1-5 Preventing static electricity Electrostatic 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 electricity Static 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 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 to release any static electricity built up in your body. 3. Handling the optical pickup 1. 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 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 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 strap Conductive material (conductive sheet) or iron plate 1-6 Block Diagram BPFFM F/E , IF/DET/MPX AM RF/IF/DET. FM OSC. PLL IC102 LC72131 LCD CD SW. TU SW. FM RF IC101 LA1823 AM ANT AM OSC. TU-5V REG. R/P PRE.AMP. IC201 TA8142AP R/P SW. R/P SW. R/P SW. SIGNAL SLECT SW. IC501 LC75342 EQ./E. VOL. R/P HEAD ERASE HEAD VD103 TU 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 ANT 1-7 DISC LA9242M M LAMP BASS CUT IC901 (ASP.) LC78622E IC902 (DSP.) MOTOR/ACTUATOR IC903 LA6541D DRIVER PICKUP M SPINDLE SLED MOTOR MOTOR KEY LC587008 IC701 (u-COM.) Q704 CD DOOR LEAF SW. 5V REG. 8V REG. IC401 JOG.VOL. POWER AMP. IC301 TA8227P SW. DC SUP. Q907 CASS.DECK LEAF SW. M DECK MOTOR L&R CH. P-CON. RECTIFIER L. SPEAKER R. SPEAKER AC INPUT 1-8 Schematic Diagrams 1-9 1-10 1-11 (No.MB063) 2003/11 JVC Euorpe Limited JVC House JVC Budiness Park 12 Priestley Way, London NW2 7BA United Kingdom