FT-7800R_维修说明书手册

YAESUVERTEX STANDARD CO.,LTD.4-8-8 Nakameguro,Meguro-Ku,Tokyo 153-8644,JapanVERTEX STANDARDDual Band FM TransceiverrtCypress.CA.YAESU EUROPE B.V.FT-7800RP.O.Box 75525,1118 ZN Schiphol,The NetherlandsYAESU UK LTDUnit 12,Sun Valley Business Park,Winnall CloseTechnical SupplementWinchester,Hampshire,S023 OLB,U.K.VERTEX STANDARD HK LTD.Unit 5,20/F.Seaview Centre,139-141 Hoi Bun Road,2003 VERTEX STANDARD CO.,LTD.(EH016M90A)Kwun Tong,Kowloon,Hong KongDownloaded byRadioAmateur.EU6.☑0☑6u8Y■IntroductionThis manual provides technical information necessary for servicing the FT-7800R Transceiver.Servicing this equipment requires expertise in handling surface-mount chip components.Attempts by non-qualifiedpersons to service this equipment may result in permanent damage not covered by the warranty,and may be illegal insome countries.Two PCB layout diagrams are provided for each double-sided circuit board in the transceiver.Each side of thr board isreferred to by the type of the majority of components installed on that side("leaded"or"chip-only").In most cases oneside has only chip components,and the other has either a mixture of both chip and leaded components(trimmers,coils,electrolytic capacitors,ICs,etc.),or leaded components only.While we believe the technical information in this manual to be correct,Vertex Standard assumes no liability for dam-age that may occur as a result of typographical or other errors that may be present.Your cooperation in pointing out anyinconsistencies in the technical information would be appreciated.ContentsSpecifications..A-1Board Unit (Schematics,Layouts Parts)Exploded View Miscellaneous Parts ....B-1MAIN Unit.....Block Diagram..........C-1PANELUnitG-1Circuit Description.........D-1CH Unit.H-1Alignment ........E-1