Vertex_VXR-7000_VHF_维修维护电器原理图手册_2003

VERTEX STANDARD CO.,LTD.Vertex Standard4-8-8 Nakameguro,Meguro-Ku,Tokyo 153-8644,JapanVERTEX STANDARDUS HeadquartersDesktop Repeater10900 Walker Street,Cypress,CA 90630,U.S.A.YAESU EUROPE B.V.VXR-7000 (VHE)P.O.Box 75525,1118 ZN Schiphol,The NetherlandsYAESU UK LTD.Service ManualWimche NampCloseVERTEX STANDARD HK LTD.2003 VERTEX STANDARD CO.,LTD.E136790AUnit 5,20/F.Seaview Centre,139-141 Hoi Bun Road,Kwun Tong,Kowloon,Hong KongVertex StandardDESKTOP REPEATER00川6VXR-7000IntroductionThis manual provides technical information necessary for servicing the VXR-7000 FM Land Mobile Repeater.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 repeater.Each side of is referred toby the type of the majority of components installed on that side("leaded"or"chip-only").In most cases one side has onlychip components,and the other has either a mixture of both chip and leaded components(trimmers,coils,electrolyticcapacitors,ICs,etc.),or leaded components only.While we believe the technical information in this manual to be correct,VERTEX STANDARD assumes no liabilityfor damage that may occur as a result of typographical or other errors that may be present.Your cooperation in pointingout any inconsistencies in the technical information would be appreciated.ContentsOperating Manual Reprint....Board Unit (Schematics,Layouts Parts)CE27Programming Software Instruction..9PAUnit27Specifications ...........14RX Unit3Exploded View Miscellaneous Parts....15CNTL Unit......55Block Diagram……17LP℉Unit73Interconnection Diagram..........20Display Unit..........75Key UnitCircuit Description2179Filter Unit.87Alignment........23VR Unit.........95PS Unit......