Jvc-VSDT-7-R-Service-Manual电路原理图.pdf

SERVICE MANUALCOMPACT COMPONENET SYSTEMNo.21119Jul. 2002COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.VS-DT7RVS-DT7RCOMPACT COMPONENT SYSTEMSTANDBY/ONPLAY MODEREPEATFM MODETREBLEBASSSETCANCELSLEEPDIMMERDISPLAYAHB PRODISPLAYMODEFM/AMPTYSEARCHPTYSELECTTA/NEWS/INFOCLOCK/TIMER OPEN/CLOSEVOLUMEMD/AUX12369101074 58+CA-VSDT7RSP-VSDT6 SP-VSDT6Area suffixEENContinental EuropeNorthern EuropeVS-DT7R2TABLE OF CONTENTS1 Important safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31.1 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31.2 Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31.3 Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31.4 Critical parts for safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31.5 Preventing static electricity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41.6 Handling the traverse unit (optical pickup) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41.7 Attention when traverse unit is decomposed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41.8 Important for laser products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62.1 Main body section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62.2 Front panel assembly section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112.3 CD mechanism assembly section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123 Adjustment method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163.1 Flow of functional operation until TOC read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163.2 Maintenance of laser pickup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173.3 Replacement of laser pickup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174 Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184.1 MN101CP30AKJ (IC701) : System control microcomputer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184.2 KIA78S06P (IC702) : Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194.3 MN662790RSC (IC651) : Digital servo & Digital signal prossesor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204.4 UPC78L05J-T (IC191) : Three terminal voltage regulator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224.5 UPD780024AGKB62 (IC251) : Unit microcomputer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224.6 LA4905 (IC301) : 2ch BTL power IC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244.7 LB1641 (IC108) : DC motor driver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244.8 MN101CP35DKB (IC811) : FL driver microcomputer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254.9 BA15218F (IC102) : Dual operational amplifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254.10 AN22000A (IC601) : RF & Servo amplifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264.11 LA1838 (IC1) : FM AM IF amplifier & Detector, FM MPX Decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . 274.12 LA6575H (IC801) : Focus & Spindle & Feed & Tracking BTL driver . . . . . . . . . . . . . . . . . . . . . . . . . . 284.13 GP1FA550TZ (J3601) : Fiber optic transmitter/Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284.14 LC72136N (IC2) : PLL frequency synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294.15 LC72723 (IC3) : RDS decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304.16 NJM4580D-D (IC101) : Dual operational amplifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314.17 RPM6938-SV4 (IC801, IC802, IC812) : Remote control receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314.18 LC75342M (IC501) : E. volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314.19 XC62HR3502P (IC291) : Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32VS-DT7R3SECTION 1Important safety precautions1.1 Safety Precautions(1) This design of this product contains special hardware andmany circuits and components specially for safety purposes.For continued protection, no changes should be made to theoriginal design unless authorized in writing by themanufacturer. Replacement parts must be identical tothose used in the original circuits. Services should beperformed by qualified personnel only.(2) Alterations of the design or circuitry of the product shouldnot be made. Any design alterations of the product shouldnot be made. Any design alterations or additions will voidthe manufacturers warranty and will further relieve themanufacture of responsibility for personal injury or propertydamage resulting therefrom.(3) Many electrical and mechanical parts in the products havespecial safety-related characteristics. These characteris-tics are often not evident from visual inspection nor can theprotection afforded by them necessarily be obtained byusing replacement components rated for higher voltage,wattage, etc. Replacement parts which have these specialsafety characteristics are identified in the Parts List of ServiceManual. Electrical components having such features areidentified by shading on the schematics and by ( )on the Parts List in the Service Manual. The use of a sub-stitute replacement which does not have the same safetycharacteristics as the recommended replacement partsshown in the Parts List of Service Manual may createshock, 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 fromlive parts, high temperature parts, moving parts and/orsharp edges for the prevention of electric shock and firehazard. When service is required, the original lead routingand dress should be observed, and it should be confirmedthat they have been returned to normal, after reassembling.(5) Leakage shock hazard testing)After reassembling the product, always perform an isolationcheck on the exposed metal parts of the product (antennaterminals, knobs, metal cabinet, screw heads, headphonejack, control shafts, etc.) to be sure the product is safe tooperate 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 currentfrom each exposed metal parts of the cabinet, particu-larly any exposed metal part having a return path to thechassis, to a known good earth ground. Any leakagecurrent must not exceed 0.5mA AC (r.m.s.). Alternate check methodPlug the AC line cord directly into the AC outlet. Use anAC voltmeter having, 1,000 ohms per volt or more sen-sitivity in the following manner. Connect a 1,500 10Wresistor paralleled by a 0.15 F AC-type capacitor be-tween an exposed metal part and a known good earthground.Measure the AC voltage across the resistor with the ACvoltmeter. Move the resistor connection to each exposed metalpart, particularly any exposed metal part having a returnpath to the chassis, and measure the AC voltage acrossthe resistor. Now, reverse the plug in the AC outlet andrepeat each measurement. Voltage measured any mustnot exceed 0.75 V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). 1.2 Warning(1) This equipment has been designed and manufactured tomeet international safety standards.(2) It is the legal responsibility of the repairer to ensure thatthese safety standards are maintained.(3) Repairs must be made in accordance with the relevantsafety standards.(4) It is essential that safety critical components are replacedby approved parts.(5) If mains voltage selector is provided, check setting for lo-cal voltage.1.3 CautionBurrs formed during molding may be left over on someparts of the chassis. Therefore, pay attention to such burrs in the case of pre-forming repair of this system.1.4 Critical parts for safetyIn regard with component parts appearing on the silk-screenprinted side (parts side) of the PWB diagrams, the parts that areprinted over with black such as the resistor ( ), diode ( )and ICP ( ) or identified by the “ “ mark nearby are criticalfor safety. When replacing them, be sure to use the parts of the same typeand rating as specified by the manufacturer. (Except the JC version)VS-DT7R41.5 Preventing 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.1.5.1 Grounding to prevent damage by static electricityStatic electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players. 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 thetraverse 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 pickup(1) In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement op-tical 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 caneasily destroy the laser diode. 1.6 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 thereplacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take toolong a time when attaching it to the connector. (3) Handle the flexible cable carefully as it may break when subjected to strong force. (4)I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it1.7 Attention when traverse unit is decomposed*Please refer to “Disassembly method“ in the text for the CD pickup unit. Apply solder to the short land before the flexible wire is dis-connected from the connector on the CD pickup unit. (If the flexible wire is disconnected without applying solder,the CDpickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short landafter connecting the flexible wire.VS-DT7R51.8 Important for laser products (1) CLASS 1 LASER PRODUCT(2) DANGER : Invisible laser radiation when open and interlock failed or defeated. Avoid direct exposure to beam.(3) CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser Unit. Replacethe complete Laser Unit if it malfunctions.(4) CAUTION : The compact disc player uses invisible laserradiation and is equipped with safety switches which prevent emission of radiation when the drawer is open andthe safety interlocks have failed or are de feated. It is dangerous to defeat the safety switches.(5) CAUTION : If safety switches malfunction, the laser is ableto function.(6) CAUTION : Use of controls, adjustments or performanceof procedures other than those specified herein may resultin hazardous radiation exposure.REPRODUCTION AND POSITION OF LABEL and PRINTWARNING LABELCAUTIONPlease use enough caution not to see the beam directly ortouch it in case of anadjustment or operation check.VARNINGOsynlig laserstrålning är denna del är öppnasd och spårren ärurkopplad. Betrakta ej strålen.VAROAvattaessa ja suojalulitus ohitettaessa olet alttiina näkymät-tömälle lasersateilylle. Älä katso säteeseen.ADVARSELUsynlig laserstrling ved åbning, når sikkerhedsafbrydere er udeaf funktion. Undgå udsasttelse for stråling.ADVARSELUsynlig laserstråling ved åpning, når sikkerhetsbryteren er avs-lott. unngå utsettelse for stråling.VS-DT7R6SECTION 2Disassembly method2.1 Main body section2.1.1 Removing the top lens VS-DT9R only (See Figs.2-1)From the top side of the main body, remove the four screws Aattaching the top lens.Fig.2-12.1.2 Removing the bottom panel (See Figs. 2-2 and 2-3.) Remove the top lens. VS-DT9R only (1) From the rear side of the main body, remove the threescrews B attaching the bottom panel. (2) From the bottom side of the main body, remove the twoscrews C attaching the bottom panel. (3) Remove the bottom panel in an upward direction.Fig.2-2Fig.2-32.1.3 Removing the top panel (See Fig. 2-4.) Remove the top lens. VS-DT9R only Remove the bottom panel.(1) Slide the top panel toward the rear (direction of the arrow)and disengage it from the engagement sections a and b ofthe bottom chassis. (2) Remove the top panel in an upward direction. Fig.2-4VS-DT7R72.1.4 Removing the CD mechanism assembly (See Fig. 2-5.) Remove the top lens. VS-DT9R only Remove the bottom panel. Remove the top panel.(1) From the top side of the main body, disengage the claw cof the CD mechanism assembly and then remove the pushbutton. (2) Remove the six screws D and screw E att