RX-V740-RX-V740RDS-DSP-AX740-RX-V640-RX-V640RDS-HTR-5660-DSP-AX640-DSP-AX640SE-Service-Manual维修操作说明书手册

AV RECEIVER/AV AMPLIFIERRX-V740/RX-V740RDS/DSP-AX740RX-V640/RX-V640RDS/HTR-5660/DSP-AX640/DSP-AX640SESERVICE MANUALIMPORTANT NOTICEThis 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,are alreadyknown and understood by the users,and have therefore not been restated.WARNING:Failure to follw 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 presentationor sal ofthis manual toany individual or fim does not constitute authorization,cerification 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 wires connect to this buss).IMPORTANT:Tum the unit OFF during disassembly and part replacement.Recheck all work before you apply power to the unit■CONTENTSTO SERVICE PERSONNEL....…2AMP ADJUSTMENT/了>プ部調整..45IMPEDANCE SELECTOR ........2DISPLAY DATA.6-47FRONT PANELS..3-5IC DATA..48-53REAR PANELS.........6-12BLOCK DIAGRAM........REMOTE CONTROL PANELS13PRINTED CIRCUIT BOARD.56-79SPECIFICATIONS/参考仕樣，..…14-17PIN CONNECTION DIAGRAM........…80INTERNAL VIEW.......18SCHEMATIC DIAGRAM .......81-92DISASSEMBLY PROCEDURES/分解手順19-22PARTS LIST..93-147SELF DIAGNOSIS FUNCTION (DIAG)/REMOTE CONTROL...148-152自己診断機能（ダ亻了)…23-44二)步一比入マ二1了儿t、工口了一夕玛定再生抵专使用T李亨。This Service Manual uses recyded paper.米YAMAHA100847YAMAHA CORPORATIONP.O.Box 1,Hamamatsu,Japan