Vertex_VX-900V_维修维护电器原理图手册_2002

VERTEX STANDARD CO.,LTD.Vertex Standard4-8-8 Nakameguo.Meguro-Ku,Tokyo 153-8644,JapanVERTEX STANDARDUS Headquarters10900 Walker Street,Cypress,CA 90630,U.SA.VX-900In temational Division8350 N.W.52nd Terrace,Suile 201,Miami,FL 33166,U.S.A.YAESU EUROPE B.V.P.O.Box 75525,1118 ZN Schiphol,The NethedandsVHF BandYAESU UK LTD.as8nes256tacoeService ManualVERTEX STANDARD HK LTD.Unit 5.20/F..Seaview Centre,139-141 Hoi Bun Road,Kwun Tong.Kowloon,Hong Kong@2002 VERTEX STANDARD CO.,LTD.Printed in Japan.IntroductionThis manual describes the circuit theory,program-ming procedures,and alignment procedures for theVX-900 VHF Portable Transceiver.Much of the operating flexibility of the VX-900 isderived from its versatile"Soft Key"front panel keys.These keys may be configured for a number of op-erating functions,as described in this manual.Following the discussion of transceiver operation,details regarding programming software,align-ment,and maintenance will follow.ContentsOperating Manual Reprint.....................2Set(Menu)Mode Functions .............10Cloning.....12Specifications.13Exploded View Miscellaneous Parts.14Bl0 ck Diagram…15Circuit Description….17Alignment….20Test Adapter Schematic25Board Units(Schematics,Layouts Parts)MAIN Unit…27VR Unit.55SW Unit….56Dummy Unit........57Optional Board Units (Schematics,Layouts Parts)E2D-82-Tone Decode Unit.........58VTP-50 VX-Trunk Unit .........60FVP-25 Encryption /DTMF Pager Unit...62F5D-145-Tone Unit….64