雅马哈Yamaha-KMA-1080–KMA-980-Karoke-Service-Manual维修服务手册说明书含电器原理图

DIGITAL KARAOKE MIXING AMPLIFIERKMA-1080/KMA-980SERVICE MANUALFor T modelKMA-1080/KMA-980IMPORTANT NOTICEThis manal has been provided for the use of authorized YAMAHA Retailers and their service personnel.known 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 and failure of the product o performas specified.For these reasonswe advise all YAMAHA product owners that any service required should be performed by an authorized YAMA-HA Retailer or the appointed service representative.IMPORTANT:The presentation or sale of this manual to any individual or firm 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 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 withou notice or obligation to retrofit.Should any discrepancy appear pleasethedisbutorsService Division.WARNING:Static discharges can destroy expensive components.Discharge ay static electricity your body may have cumulated by grounding yourself o the ground buss in the unit (heavy gauge black wires conect 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 PERSONNEL3CONFIRMATION OF IDLING CURRENT OF AMPIMPEDANCE SELECTOR ......3UNIT ....m.14FRONT PANELSIC DATA.m......15-17REAR PANELS..BLOCK DIAGRAM .....18REMOTE CONTROL PANEL.5PIN CONNECTION DIAGRAMS ..........19SPECIFICATIONS5-6PRINTED CIRCUIT BOARDS....20-30INTERNAL VIEW ....SCHEMATIC DIAGRAMS..31-37DISASSEMBLY PROCEDURESREPLACEMENT PARTS LIST39-47INDICATION OF PROTECTION INFORMATION ........8REMOTE CONTROL........48SELF-DIAGNOSTIC FUNCTION.9-13SETUP MODE .........49-51一上又二了儿信、工了一夕定0再生抵在使用儿℃《未寸This Service Manual uses recycled paper.YAMAHA101164YAMAHA CORPORATIONredistributed either n printor electronically without permission.PO.Box 1.Hamamatsu,Japan☐10.02