Yamaha-DVDC740-dvd-sm 维修电路原理图.pdf
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1、100827SERVICE MANUALDVD PLAYERThis manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, arealready known and understood by the users, and have
2、 therefore not been restated.WARNING:Failure to follow appropriate service and safety procedures when servicing this product may result inpersonal injury, destruction of expensive components, and failure of the product to perform as specified.For these reasons, we advise all YAMAHA product owners th
3、at any service required should be performedby an authorized YAMAHA Retailer or the appointed service representative.IMPORTANT:The presentation or sale of this manual to any individual or firm does not constitute authorization, certifi-cation or recognition of any applicable technical capabilities, o
4、r establish a principle-agent relationshipof any form.The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering,and service departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore,inevi
5、table and specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear toexist, please contact the distributors Service Division.WARNING:Static discharges can destroy expensive components. Discharge any static electricity your body may haveaccumulated
6、by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to thisbuss).IMPORTANT:Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power tothe unit.IMPORTANT NOTICEDVD-C740/DV-C6660SERVICE MANUALI CONTENTSTO SERVICE PERSONNEL .23
7、PREVENTION OF ELECTROSTATIC DISCHARGE .4LOCALE MANAGEMENT INFORMATION .4FRONT PANELS .5REAR PANELS .6SPECIFICATIONS .7DIMENSIONS .8INTERNAL VIEW .8DISASSEMBLY PROCEDURES .910DIAGNOSTIC SOFTWARE.1119IC DATA .2025BLOCK DIAGRAM .27PRINTED CIRCUIT BOARD .2836SCHEMATIC DIAGRAM .3754PARTS LIST .5462DVD-C7
8、40/DV-C6660RadioFans.CN 收音机爱 好者资料库DVD-C740/DV-C6660DVD-C740/DV-C66602ITO SERVICE PERSONNEL1. Critical Components InformationComponents having special characteristics are marked Zand must be replaced with parts having specifications equalto those originally installed.2. Leakage Current Measurement (F
9、or 120V Models Only)When service has been completed, it is imperative to verifythat all exposed conductive surfaces are properly insulatedfrom supply circuits.GMeter impedance should be equivalent to 1500 ohm shuntedby 0.15F.GLeakage current must not exceed 0.5mA.GBe sure to test for leakage with th
10、e AC plug in bothpolarities.AC LEAKAGETESTER OREQUIVALENTEQUIPMENTUNDER TESTINSULATINGTABLEWALLOUTLETWARNING: Laser SafetyThis product contains a laser beam component. This component may emit invisible, as well as visible radiation,which may cause eye damage. To protect your eyes and skin from laser
11、 radiation, the following precautions mustbe used during servicing of the unit.1) When testing and/or repairing any component within the product, keep your eyes and skin more than 30 cm away fromthe laser pick-up unit at all times. Do not stare at the laser beam at any time.2) Do not attempt to read
12、just, disassemble or repair the laser pick-up, unless noted elsewhere in this manual.3) CAUTION : Use of controls, adjustments or performance of procedures other than those specified herein may result inhazardous radiation exposure.WARNING: CHEMICAL CONTENT NOTICE!The solder used in the production o
13、f this product contains LEAD. In addition, other electrical/electronic and/orplastic (where applicable) components may also contain traces of chemicals found by the California Health andWelfare Agency (and possibly other entities) to cause cancer and/or birth defects or other reproductive harm.DO NO
14、T PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FORANY REASON WHATSOEVER!Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumesor expose eyes to solder/flux vapor!If you come in contact with solder or components located
15、 inside the enclosure of this product, wash your handsbefore handling food.Laser Emitting conditions:1) When the Top Cover is removed, and the STANDBY/ON SW is turned to the ON position, the laser component willemit a beam for several seconds to detect if a disc is present. During this time (5-10 se
16、c.) the laser may radiate throughthe lens of the laser pick-up unit. Do not attempt any servicing during this period!If no disc is detected, the laser will stop emitting the beam. When a disc is loaded, you will not be exposed to any laseremissions.2) The laser power level can be adjusted with the V
17、R on the pick-up PWB, however, this level has been set by the factoryprior to shipping from the factory. Do not adjust this laser level control unless instruction is provided elsewhere in thismanual. Adjustment of this control can increase the laser emission level from the device.THE DVD AUDIO/VIDEO
18、 PLAYER SHOULD NOT BE ADJUSTED OR REPAIRED BY ANYONE EXCEPT PROPERLY QUALIFIEDSERVICE PERSONNEL.RadioFans.CN 收音机爱 好者资料库DVD-C740/DV-C6660DVD-C740/DV-C66603Laser Diode PropertiesType:Semiconductor laser GaAlAsWave length:650 nm (DVD)780 nm (VCD/CD)Output Power:0.8 mW (DVD)0.3 mW (VCD/CD)Beam divergenc
19、e:60 degreeVARO!: AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA NKYMTTMLLELASER-STEILYLLE. L KATSO STEESEEN.VARNING! : OSYNLIG LASERSTRLNING NR DENNA DEL R PPNAD OCH SPRREN R URKOPPLAD.BETRAKTA EJ STRLEN.Optical pick-upCLASS 1 LASER PRODUCTLASER KLASSE 1 PRODUKTLUOKAN 1 LASERLAITEKLASS 1 LAS
20、ER APPARATPRODUIT LASER DE CLASSE 1CAUTION VISIBLE AND INVISIBLE LASER RADIATION WHEN OPEN. AVOID EXPOSURE TO BEAMADVARSEL SYNLIG OG USYNLIG LASERSTRLING VED BNING UNDG UDSTTELSE FOR STRLINGADVARSEL SYNLIG OG USYNLIG LASERSTRLING NR DEKSEL PNES UNNG EKSPONERING FOR STRLENVARNING SYNLIG OCH OSYNLIG L
21、ASERSTRLNING NR DENNA DEL R PPNAD BETRAKTA EJ STRLENVARO ! AVATTAESSA OLET ALTTIINA NKYVLLE JA NKYMTTMLLE LASER STEILYLLE, L KATSO STEESEENVORSICHT SICHTBARE UND UNSICHTBARE LASERSTRAHLUNG WENN ABDECKUNG GEFFNET NICHT DEM STRAHL AUSSETSENDANGER VISIBLE AND INVISIBLE LASER RADIATION WHEN OPEN AVOID D
22、IRECT EXPOSURE TO BEAMATTENTION RAYONNEMENT LASER VISIBLE ET INVISIBLE EN CAS DOUVERTURE EXPOSITION DANGEREUSE AU FAISCEAUDVD-C740/DV-C6660DVD-C740/DV-C66604I PREVENTION OF ELECTROSTATIC DISCHARGEI LOCALE MANAGEMENT INFORMATIONLocale Management Information : This DVD player is designed and manufactu
23、red to respond to the LocaleManagement Information that is recorded on a DVD disc. If the Locale number described on the DVD disc does notcorrespond to the Locale number of this DVD player, this DVD player cannot play this disc.This product incorporates copyrightprotection technology that is protect
24、ed bymethod claims of certain U.S. patents andother intellectual property rights owned byMacrovision Corporation and other rightsowners. Use of this copyright protectiontechnology must be authorized byMacrovision Corporation, and is intendedfor home and other limited viewing usesonly unless otherwis
25、e authorized byMacrovision Corporation. Reverseengineering or disassembly is prohibited.qwrwttrwyetThe laser diode in the traverse unit (optical pickup) may be damaged due to static electricity from clothes or the humanbody. Use caution to prevent electrostatic damage when servicing or handling the
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