Vertex_VX-5500U_维修维护电器原理图手册

Vertex StandardVERTEX STANDARD CO.,LTD.4-8-8 Nakameguro,Meguro-Ku,Tokyo 153-8644,JapanVERTEX STANDARDUS HeadquartersUHF FM Transceiver10900 Walker Street,Cypress,CA 90630.U.S.A.YAESU EUROPE B.V.VX-5500UP.O.Box 75525,1118 ZN Schiphol,The NetherlandsYAESU UK LTD.Service ManualUnit 12,Sun Valley Business Park,Winnall CloseWinchester,Hampshire,SO23 OLB.U.K.VERTEX STANDARD HK LTD.@2003 VERTEX STANDARD CO.,LTD.EC034U90AUnit 5,20/F.,Seaview Centre,139-141 Hoi Bun Road,Kwun Tong,Kowloon,Hong KongIntroductionThis manual provides technical information necessary for servicing the VX-5500U UHF FM 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 is referredto by the type of the majority of components installed on that side("leaded"or"chip-only").In most cases one side hasonly chip 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..1-1Board Unit (Schematics,Layouts Parts)☑0ning.2-1MAIN Unit6A-1Specifications ........DISPLAYUnit6B-1.2-2KEY Unit6C-1Exploded View Miscellaneous Parts...3-1VR Unit.....6D-1Block Diagram3-2MIC CONN Unit........6D-2Interconnection Diagram.3-4Optional Board Unit (Schematics,Layouts Parts)E2D-82-Tone Decode Unit...7A-1Circuit Description4-1VTP-50 VX-Trunk Unit..7B-1Alignment…..5-1FVP-25 Encryption/DTMF Pager Unit ..........C-1E5D-145-Tone Unit.7D-1FIE-7A Connection Unit..E-1