Jvc-PCX-290-Service-Manual电路原理图.pdf

SERVICE MANUALCOPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITEDNo.MB2012004/4CD PORTABLE COMPONENT SYSTEMMB20120044PC-X290TABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3SP-PCX290CA-PCX290SP-PCX290SENSORTAPE AUXPLAYRECPLAYPHONESPRESETUP/REPEATPROGRAM/SETNWODTESERPORTNIYALPS IDCD/RANDOMTUNER/BANDPLAY REW FF PAUSEPLAY REW FF STOP/EJECT PAUSEREC-+CD SYNCHRO RECORDING AUTO STOP SYSTEMCD PORTABLE COMPONENT SYSTEM STOP/EJECTSTANDBYA BVOLUMEHBS/PRESETEQSTANDBY/ONFM MODETAPE CD/RANDOM TUNER/BANDArea suffixJ - U.S.A.C - CanadaSERVICE POLICYNo service part is available for this model.Exchange only.1-2 (No.MB201)SPECIFICATIONDesigns and specifications are subject to change without notice.Amplifier Output Power 5 W per channel, min. RMS, driven into 3.2 at 1 kHz with no more than10% total harmonic distortion.Audio input sensitivity/Impedance (at 1 kHz) AUX:1 000 mV/47 kSpeakers/Impedance 3.2 - 8 Tuner FM tuning range 87.5 MHz - 108.0 MHzAM tuning range 530 kHz - 1 710 kHzCD player CD Capacity 1 CDDynamic range 60 dBSignal-to-noise ratio 75 dBCassette deck Frequency response Normal (type I) 50 Hz - 10 000 HzWow and flutter: 0.15% (WRMS)General Power requirements AC 120 V , 60 HzDC 12 V (“R20(SUM-1)/D(13D)“ batteries (8)Power consumption 20 W (at operation)3 W (on standby)Dimensions (approx.) 270 mm × 274 mm × 298 mm (W/H/D) (10 11/16 in. × 10 3/4 in. × 11 3/4 in.)Mass (approx.) 4.1 kg (9.1 lbs)Speaker Type 2-way bass-reflex typeSpeaker units Woofer: 10 cm (4 in.) cone × 1Tweeter: 5 cm (2 in.) cone × 1Power handling capacity 5 WImpedance 3.2 Frequency range 50 Hz - 18 000 HzDimensions (approx.) 180 mm × 270 mm × 228 mm (W/H/D) (7 1/8 in. × 10 3/4 in. × 9 in.)Mass (approx.) 1.7 kg (3.8 lbs) each(No.MB201)1-3SECTION 1PRECAUTIONThis service manual does not describe PRECAUTION.SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.SECTION 3DISASSEMBLYThis service manual does not describe DISASSEMBLY.SECTION 4ADJUSTMENTThis service manual does not describe ADJUSTMENT.SECTION 5TROUBLESHOOTINGThis service manual does not describe TROUBLESHOOTING.(No.MB201)AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,JapanVICTOR COMPANY OF JAPAN, LIMITEDWPCPrinted in JapanPC-X290 HYPER-BASS SOUNDHYPER-BASS SOUNDAreas Suffix J.USA C.Canada Contents Page Safety precautions. 2 Exploded view.35 Block diagram . 3 Mechanical parts list.37 Disassembly instructions. 4 Electrolytic parts list .40 Troubleshooting . 5 IC lead identification Main adjustment. 7 and transistor pin out diagrams .51 Wiring connections. 11 Voltage charts.60 Printed circuit boards. 12 Illustration of Packing and Parts List .62 Schematic diagrams. 30 This service manual is made from 100% recycled paper. COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.No. APR. 2004 PC-X290 SERVICE MANUAL CD PORTABLE COMPONENT SYSTEM 2 1. This design of this product contains special hardware and many 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. Services should be performed by qualified personnel only. 2. Alterations 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 manufacturer warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting there from. 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 voltage, 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 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, tubing, 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. 5. Leakage current 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 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 and exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.) Alternate check method Plug 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 resistor paralleled by a 0.15µF 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 eachexposed metal part, particularly any exposed metal part having a return path to the chassis, and measure 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.). Warning 1. This equipment has been designed and manufactured to meet international safety standards. 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 provided, check setting for local voltage. CAUTION 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. 0.15µF AC TYPE1500 10WPlace thisprobe oneach exposedmetal part.Good earth groundAC VOLTMETER (Having 1000 ohms/volts, or more sensitivity PC-X290 30/MAR/2004Safety Precautions 3 BLOCK DIAGRAM TunerTA2149PLLTC9257LCDDisplayBackLightMCU/CDTC94A09RemoteControlKeyBoardRemotesensorCD PickUpCD RFAMPTA2153FNSourceSelectorTC9422PowerAMPTA8229PKSpeakerMainVoltageRegulatorRectifierPowerSupplyCD/MCUVoltageRegulatorACINCD ServoTA2092For TunerForTapeForMCU/CDAUXINTapeBDeckTapeADeckTapeSectionTA8189NPhonePC-X290 30/MAR/2004 4 DISASSEMBLY INSTRUCTIONS ABThis Class B digital apparatuscomplies with CanadianICES-003.Cet appareil numerique de laclasse B est conforme a lanorme NMB-003 du Canada.C CCOPEN OPENAC INDO NOT USE THIS UNITIN DIRECT SUNLIGHTOR LEAVE THE UNITIN CLOSED AUTOMOBILES(OR YACHTS, ETC.)WHERE IT WOULD BE EXPOSEDTO THE HIGH TEMPERATURE(ABOVE 40 C (104 F)R LBEAT CUT RESET12R LAUX INANT.SCREWSPEAKER IMPEDANCE MIN 3.2DDDDDDDRemoving Left and Right and Top side and back sideRemove all screws on left and right and back sidePC-X290 30/MAR/2004 5 TROUBLESHOOTING Circuit Symptom Cause and Remedy General No sound Speakers are not connected: Check the speaker connection. Wrong function is selected: Set switch to the proper position. Defective volume control: Set the volume control to a proper sound level. Defective earphone jack: Replace the earphone jack. Defect in IC404 Check voltages. Replace if necessary. Defect in IC401 Check voltages. Replace if necessary. MW No sound, weak sound (Low sensitivity) Improper location of unit: Rotate or reposition the unit. Defect in IF T101: Check resistance, voltage, and current. Replace as needed. Defect AM antenna coil L103 or oscilloscope coil L104: Replace if necessary. Intermediate Frequency tuning faulty: Readjust (see “Alignment and Adjustment”). RF tracking faulty: Readjust (see Alignment and Adjustment”). Defective IC101: Check voltages. Replace if necessary. Defective IC102: Check voltages. Replace if necessary. Poor contact in antenna circuit: Check resistance and resolder. FM No sound, weak sound (Low sensitivity) FM antenna not connected: Connect the built-in or external antenna. Defective band selector switch: Replace or repair the switch. Defective IC101: Check voltages. Replace if necessary. Defective IC102: Check voltages. Replace if necessary. Intermediate Frequency tuning faulty: Readjust (see “Alignment and Adjustment”). Poor contact in FM antenna circuit: Resolder or repair as required. Tape No sound/recording, unsteady tape sound, weak sound Dirty capstan or head: Clean the capstan or head with alcohol. Irregular cassette tape winding: Replace tape. Defective IC201: Check voltage. Replace if necessary. Defective L203: Check voltages. Replace if necessary. Cassette erasure prevention tabs broken out: Replace tape or cover tab openings with adhesive tape. CD Cannot read the table of content. no sound Disc is inserted upside down: Insert disc correctly. Disc is dirty: Wipe clean with a soft cloth. Disc is scratched: Use a new disc. Disc is seriously warped: Use a new disc. PC-X290 30/MAR/2004 6 Circuit Symptom Cause and Remedy CD Cannot read the table of content. no sound A non-standard disc has been inserted: Use only a brand name disc. Moisture has formed inside the CD deck: Wait about 20 to 30 minutes. Defective Q407: Check voltages. Replace if necessary. Defective IC301: Check voltages. Replace if necessary. Defective IC302 Check voltages. Replace if necessary. Defective IC303: Check voltages. Replace if necessary. Defect in the CD pickup mechanism: Replace as required. PC-X290