JVC-UXV30-cs-sm 维修电路原理图.pdf
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1、1-1UX-V30SERVICE MANUALMICRO COMPONENT SYSTEMNo.20888Dec. 2000COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.UX-V30UX-V30ContentsSafety precautionsImportant for laser productsDisassembly methodMain adjustmentFlow of functional operation until TOC readMaintenance of laser pickupReplacement of laser pick
2、up Description of major ICs1-21-31-41-141-181-191-191-20Area SuffixThis service manual is printed on 100% recycled paper.UFChinaAUTO REVERSEAUTO TA PE SELECTO RT APEDOWNUPMULTI CONTROLTAPEFM/AMCDSTANDBY/ONPHONESMD/AUXRECREV.MODEAHBPROTIMERCLOCKVERTICAL DISCLOADING MECHANISMCOMPACTDIGITAL AUDIOVOLUME
3、CDOPEN/CLOSEREMOTE CONTROL RM-RXUV5RDIMMERSLEEPDISPLAYFM MODEMD/AUXAHB PROAUTOPRESETCDPROGRAM RANDOMREPEATBASSTREBLECANCELUPSETDOWNTUNERBANDTAPEVOLUMECDMICRO COMPONENT SYSTEM UX-V30RadioFans.CN 收音机爱 好者资料库1-2UX-V30Safety Precautions1. This design of this product contains special hardware and many cir
4、cuits 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 perso
5、nnel 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 manufacturers warranty and will further relieve the manufacture of responsibility for personal injury or
6、property damage resulting therefrom.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
7、rated for higher voltage, wattage, etc. Replacement parts which have 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
8、 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, tubings, barriers and th
9、e 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, a
10、fter re-assembling.5. Leakage currnet 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 produc
11、t 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 any exposed met
12、al 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 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. Connec
13、t a 1,500 10W resistor paralleled by a 0.15 F 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 pa
14、th to the chassis, and meausre 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.). Warning1. This equipment has been designed and manufactured to meet
15、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
16、 voltage selector is provided, check setting for local voltage.Good earth groundPlace this probe on each exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE!CAUTIONBurrs formed during molding may be left over on some parts of the chassis. Therefore, pay a
17、ttention to such burrs in the case of preforming repair of this system.RadioFans.CN 收音机爱 好者资料库1-3UX-V30Important 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 no serviceab
18、le 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 safety interl
19、ocks 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 radiation exposur
20、e.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. Undg udsttel
21、se for strling.ADVARSEL : Usynlig laserstrling ved pning,nr sikkerhetsbryteren er avslott. unng utsettelse for strling.REPRODUCTION AND POSITION OF LABELSWARNING LABEL!CAUTIONPlease use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.1-4UX-V30Remove
22、 the eight screws A attaching the rear cover on the back of the body.Remove the two screws B attaching the rear cover on the bottom of the body.Unlock the speaker terminal and the antenna terminal, then remove the rear cover backward with releasing the hooks.1.2.3.Disassembly method Removing the rea
23、r cover (See Fig.1 and 2)Prior to performing the following procedure, remove the rear cover.Move the side panels in the direction of the arrow and remove them backward.1.Removing the side panels (See Fig.3 and 4)Fig.1Fig.2Fig.3Fig.4Rear coverAAAAARear coverBBSide panel (L)Side panel (R)1-5UX-V30Prio
24、r to performing the following procedure, remove the rear cover and the side panels.Disconnect the card wires from connector CN304 and CN305 on the main board on the left side of the body.Disconnect the harness from connector CN309 on the Opt, Dig.out board on the right side of the body. Cut off the
25、band fixing the harness.Remove the two screws C attaching the cassette mechanism assembly on both sides of the body and release the two joints a.Remove the cassette mechanism assembly in the direction of the arrow.1.2.3.4.Removing the cassette mechanism assembly (See Fig.5 and 6)Prior to performing
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