FT-290R2_serv维修手册含电器原理图

FT-290RIΠTECHNICAL SUPPLEMENTThis manual is intended to serve as a supplement to the FT-290RII Operating Manual.Detailed information regarding functions,specifications,options and operation has beenprovided in the Operating Manual,and is not reprinted herein.Therefore,this supplementis not intended to serve as an independent reference,but to be used in conjunction withthe information provided in the Operating Manual.Because of the compactness and complexity of the double-sided glass-epoxy circuit boardsused in the FT-290RII,four layout diagrams are provided for each board.Each side ofthe board is identified by the type of the majority of components installed on that sideIn most cases one side has only chip components,and the other has either a mixture ofboth chip and lead components (trimmers,coils,electrolytic capacitors,packaged ICs,etc.),or lead components only.The two "obverse"views depict the board as it is seenwhen viewed directly with the eye,while the two "reverse"views depict the unseen sideof the board as it would appear if one were to peer through the board from the other sidewithout seeing the components and tracks on the near side.While we believe the technical information in this manual is correct,Yaesu assumes noliability for damage that may occur as a result of typographical or other errors that may bepresent.Your cooperation in pointing out any inconsistencies in the technical informationwould be appreciated.Yaesu Musen reserves the right to make changes in the circuitry of this transceiver,in theinterest of technological improvement,without notification of the owners.YAESU MUSEN CO.,LTD.C.P.0.B0X1500TOKYO,JAPANDownloaded by▣口Amateur Radio Directrory