RX-V420_HTR5440

AV RECEIVERRX-V420/RX-V420RDS/HTR-5440/HTR-5440RDSSERVICE MANUALYAMAHAGATMADNE@ooH品86石56656登aHRSMOHTAS4ORDS笪骂@色@IMPORTANT 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 folbw appropriate service and safety procedures when servicing this product may result in personalin jury,destruction of expensive components,and failure of the product to perform as specified.For these reasonswe advise all YAMAHA product owners that any servicerequired should be performed by an authorizedYAMAHA Retailer or the appointed service representative.IMPORTANT:The presentationor sale ofthis manual toany individuaor fim does not 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 curate 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 DivisionWARNING: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.1SELF DIAGNOSIS FUNCTION (DIAG)..................9-24IMPEDANCE SELECTOR..............1AMP ADJUSTMENTS......24FRONT PANELS...23DISPLAY DATA25-26REMOTE CONTROL TRANSMITTER3IC DATA27-32REAR PANELS..4-5BLOCK DIAGRAM.....33-36SPECIFICATIONS6PRINTED CIRCUIT BOARDINTERNAL VIEWIC BLOCK DIAGRAM.53-54DISASSEMBLY PROCEDURESSCHEMATIC DIAGRAM..55-58PARTS LIST...59-72己)步一上入マ二1了t、工门了一夕玛定)再生抵专使用儿T李亨。REMOTE CONTROL TRANSMITTER ...............73-76This Service Manual uses recyded paper.米YAMAHA100754YAMAHA CORPORATIONP.O.Box 1,Hamamatsu,Japan