编号6：雅马哈YAMAHA-x-v557_v457功放维修图纸手册

AV RECEIVER/AV AMPLIFIERRX-V557/HTR-5850/DSP-AX557RX-V457/HTR-5840/DSP-AX457SERVICE MANUALIMPORTANT NOTICEThis manual has been provided for the use of authorizd YAMAHA Retailers and their service personnel.It has been assumed that basic service procedures inherent to the industry,and more specifically YAMAHA Products,are alreadyknown and understood by the users,and have therefore not been restated.WARNING:Failure to follow appropriate service and safety procedures when servicing this product may result in personalinjury,destruction of expensive components,and failure of the product to perform as specified.For these reasons,we advise all YAMAHA product owners that any service required should be performed by an authorizedYAMAHA Retailer or the appointed service representative.IMPORTANT:The presentation or sale of this manual toany individualor fim doesnot constitute authorization,certification orrecognition of any applicable technical capabilities,or establish a principle-agent relationship of any form.The data provided is believed to be accurate and applicable to the unit(s)indicated on the cover.The research,engineering.andservice departments of YAMAHA are continually striving to improve YAMAHA products.Modifications are,therefore,inevitableand specifications are subject to change without notice or obligation to retrofit.Should any discrepancy appear to exist,pleasecontact the distributor's Service Division.WARNING:Static discharges can destroy expensive components.Discharge any static electricity your body may haveaccumulated by grounding yourself to the ground buss in the unit (heavy gauge black wiresconctto this buss).IMPORTANT:Turn the unit OFF during disassembly and part replacement.Recheck all work before you apply power to the unit.■CONTENTSTO SERVICE PERSONNEL2AMP ADJUSTMENT/了>プ部調整.45FRONT PANELS.....3-6IC DATA.46-51REAR PANELS…6-15BLOCK DIAGRAM..52-55SPECIFICATIONS/参考仕樣16-18DISPLAY DATA .......56INTERNAL VIEW ......18-19PRINTED CIRCUIT BOARD57-79REMOTE CONTROL PANELS..........19PIN CONNECTION DIAGRAM......80D1 SASSEMBLY PROCEDURES/分解手顺..20-23SCHEMATIC DIAGRAM...........…81-93SELF DIAGNOSIS FUNCTION(DIAG)/PARTS LIST95-129自己診断機能（ダ亻了).…….2444REMOTE CONTROL..130-131二D竹一上入了二1了儿体、工3マ一夕语定再生毓卷使用儿T'米寸This Service Manual uses recycled paper米YAMAHA100941YAMAHA CORPORATIONP.O.Box 1,Hamamatsu,Japan705.03