Jvc-RVB-550-Service-Manual电路原理图.pdf
《Jvc-RVB-550-Service-Manual电路原理图.pdf》由会员分享,可在线阅读,更多相关《Jvc-RVB-550-Service-Manual电路原理图.pdf(93页珍藏版)》请在收音机爱好者资料库上搜索。
1、SERVICE MANUALCD PORTABLE SYSTEMNo.20826CJan. 2001COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.RV-B550BURV-B550BUArea SuffixContentsSafety precautions .1-2Importance administering point on the safety . 1-3 Important for laser products . 1-4Preventing static electricity . 1-5Disassembly method . 1-6Ad
2、justment method . 1-15Flow of functional operation until TOC read . 1-19Maintenance of laser pickup . 1-20Replacement of laser pickup .1-20Description of major ICs . 1-2129UY . ArgentinaThis service manual adds UY version to the service manual(RV-B550BU No.20826) previously issued.This service manua
3、l is made from 100% recycled paper.SLEEPCLOCK TIMERTIMERON/OFFPROGRAMRANDOMREPEATAUTOPRESETDISPLAYREVERSE MODE MULTI CONTROLREW FFRM-RXVB55REMOTE CONTROLTAPE TUNER BANDFM MODEC DDOWN UP SETAUXVOLUMEAHB PROSOUND ACSSupplementRV-B550BU1-2Safety precautions1. This design of this product contains specia
4、l 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 perfo
5、rmed 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 manufacturers warranty and will further relieve the manufacture of responsibility
6、for personal injury or 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
7、replacement components 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
8、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, t
9、ubings, 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 bee
10、n 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.
11、) 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 , par
12、ticularly any 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 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
13、following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor between an exposedmetal part and a known good earth ground.Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal
14、 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.). Warning1. This equipment has been designed a
15、nd 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 ap
16、proved parts.5. If mains 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 c
17、hassis. Therefore, pay attention to such burrs in the case of preforming repair of this system.RV-B550BU1-3Importance administering point on the safety RV-B550J ONLYFull Fuse Replacement MarkingGraphic symbol mark (This symbol means fast blow type fuse.)should be read as follows ;FUSE CAUTIONFOR CON
18、TINUED PROTECTION AGAINST RISKOF FIRE, REPLACE ONLY WITH SAME TYPEAND RATING OF FUSES ;F1901 : 1.0-A, 250-VF1902 : 6.3-A, 125-VF1903 : 6.3-A, 125-VF1904 : 6.3-A, 125-VF1901 : 1.0-A, 250-VF1902 : 6.3-A, 125-VF1903 : 6.3-A, 125-VF1904 : 6.3-A, 125-VRV-B550J SEULEMENTMarquage Pour Le Remplacement Compl
19、et De FusiblePRECAUTIONS SUR LES FUSIBLESPOUR UNE PROTECTION CONTINUE CONTRE DES RISQUES DINCENDIE, REMPLACER SEULEMENT PAR UN FUSIBLE DU MEME TYPE ;Le symbole graphique (Ce symbole signifie fusible de type a fusion rapide.)doit etre interprete comme suit ;Note : Its means “J“ for U.S.A. and Canada
20、market model. RV-B550BU1-4Important 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 serviceable parts inside theLaser Unit. Do not disassemble the Laser Unit. Replace the
21、 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 interlocks have failed or are defeated. It is dangerous to defeat the safety switch
22、es.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 exposure.VARNING : Osynlig laserstrlning r denna del r ppnad och sprren r urkopplad.
23、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. Undgudsttelse for strling.ADVARSEL : Usynlig laserstrling ved pning,nrsikkerhetsbryteren e
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- JvcRVB550ServiceManual 电路 原理图