JVC-MXK1-cs-sm 维修电路原理图.pdf
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1、SERVICE MANUALCOMPACT COMPONENT SYSTEMNo.20942May. 2001COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.MX-K1MX-K1ContentsSafety precautionsImportant for laser productsPreventing static electricityDisassembly methodAdjustment methodFlow of functionaloperation until TOC readMaintenance of laser pickupRepl
2、acement of laser pickupDescription of major ICs1-21-31-41-51-181-201-211-211-22Area SuffixJCU.S.A.CanadaACTIVEBASS EX.COMPACT COMPONENT SYSTEM MX-K1STANDBY/ONSTANDBYPHONESREPEATPROGRAMRANDOM/STOPREC STARTDUBBINGREC STARTCDCLOCK/TIMERTAPEA/BDISC SKIPEJECTPLAYAREC/PLAYBCD CONTROLCD 1AUXFM/AMCDTAPECD 2
3、CD 3CD-R/RW PLAYBACKVCD NUMBERRETURNPBCMAXMINMICMICVOLCANCELSET1 BIT DUAL D/ACONVERTERPRESETTUNNIG/ DEMOCOMPU PLAY CONTROLACTIVE BASS EXTENSIONFULL - LOGIC CONTROLCD SYNCHRO RECORDINGEJECTROCKCLASSICPOPVOLUME3-CDPLAY & EXCHANGESOUNDMODERM-SMXK3A REMOTE CONTROL12345678910+10FM MODEFM /AMAUXSLEEPSTAND
4、BY/ONCD1CD2CD3CDSOUNDMODEACTIVEBASS EX.FADEMUTINGVOLUME11PROGRAM/RANDOMREPEATTAPE A/BTAPE11111111COMPU PLAYCONTROLCA-MXK1SP-MXK1SP-MXK1RadioFans.CN 收音机爱 好者资料库MX-K11-21. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued
5、 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 produc
6、t 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 resulting therefrom.3. Many electrical and mechan
7、ical 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, wattage, etc. Replacement parts which h
8、ave 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 replacement which does not have the same saf
9、ety 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 separated from live parts, high temperature parts, m
10、oving 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 currnet check (Electrical shock haz
11、ard 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 us
12、e 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 return path to the chassis, to a known good earth
13、 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 resistor paralleled by a 0.15 F AC-type capacitor b
14、etween 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 meausre the AC voltage across the resistor
15、. 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 standards.2. It is the legal responsibility of the
16、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.Good eart
17、h 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 of preforming repair of this system.In regar
18、d 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. When replacing them, be sure to use the parts of the
19、 same type and rating as specified by the manufacturer. (Except the J and C version)RadioFans.CN 收音机爱 好者资料库MX-K11-3Important for laser products1.CLASS 1 LASER PRODUCT2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam.3.CAUTION : There are
20、no serviceable parts inside theLaser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions.4.CAUTION : The compact disc player uses invisible laserradiation and is equipped with safety switches whichprevent emission of radiation when the drawer is open and the s
21、afety interlocks have failed or are de feated. It is dangerous to defeat the safety switches.5.CAUTION : If safety switches malfunction, the laser is able to function.6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radia
22、tion exposure.VARNING : Osynlig laserstrlning r denna del r ppnad och sprren r urkopplad. Betrakta ej strlen.VARO : Avattaessa ja suojalukitus ohitettaessa olet alttiina nkymttmlle lasersteilylle.l katso steeseen.ADVARSEL : Usynlig laserstrling ved bning , nr sikkerhedsafbrydere er ude af funktion.
23、Undg udsttelse for strling.ADVARSEL : Usynlig laserstrling ved pning,nr sikkerhetsbryteren er avslott. unng utsettelse for strling.REPRODUCTION AND POSITION OF LABELSWARNING LABELDANGER : Invisibie laser radiation when open and interlock or defeated.AVOID DIRECT EXPOSURE TO BEAM (e)VARNING : Osynlig
24、 laserstrlning r denna del r ppnad och sprren r urkopplad. Betrakta ej strlen. (s)VARO : Avattaessa ja suojalukitus ohitettaessa olet alttiina nkymttmlle lasersteilylle.l katso steeseen. (d)ADVARSEL :Usynlig laserstrling ved bning , nr sikkerhedsafbrydere er ude af funktion. Undg udsttelse for strli
25、ng. (f)!CAUTIONPlease use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.MX-K11-4Preventing static electricity1. Grounding to prevent damage by static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the bod
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