yaesu-ft-2800m-technical-supplement, krótkofalarstwo
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//-->VERTEX STANDARD CO., LTD.4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, JapanVERTEX STANDARDFM TRANSCEIVERUS Headquarters10900 Walker Street, Cypress, CA 90630, U.S.A.International Division8350 N.W. 52nd Terrace, Suite 201, Miami, FL 33166, U.S.A.FT-2800MTechnical Supplement©2003 VERTEX STANDARD CO., LTD.EH014N90AYAESU EUROPE B.V.P.O. Box 75525, 1118 ZN Schiphol, The NetherlandsYAESU UK LTD.Unit 12, Sun Valley Business Park, Winnall CloseWinchester, Hampshire, SO23 0LB, U.K.VERTEX STANDARD HK LTD.Unit 5, 20/F., Seaview Centre, 139-141 Hoi Bun Road,Kwun Tong, Kowloon, Hong KongPWRMHzREVLOWD/MRIntroductionThis manual provides technical information necessary for servicing the FT-2800M FM Transceiver.Servicing this equipment requires expertise in handling surface-mount chip components. Attempts by non-qualified per-sons to service this equipment may result in permanent damage not covered by the warranty, and may be illegal in somecountries.Two PCB layout diagrams are provided for each double-sided circuit board in the Transceiver. 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 liability fordamage that may occur as a result of typographical or other errors that may be present. Your cooperation in pointing outany inconsistencies in the technical information would be appreciated.ContentsSpecifications.....................................................Exploded View & Miscellaneous Parts ...........Block Diagram ..................................................Circuit Description ..........................................Alignment ..........................................................23579Board Unit(Schematics, Layouts & Parts)µCOM Unit /RF Unit Circuit Diagram .......................... 13µCOM Unit Parts Layout .............................................. 15µCOM Unit Parts List ................................................... 17RF Unit Parts Layout ..................................................... 21RF Unit Parts List .......................................................... 231SpecificationsGeneralFrequency Range:Channel Step:Standard Repeater Shift:Frequency Stability:Modes of Emission:Antenna Impedance:Supply voltage:Current Consumption(typical):Operating Temperature Range:Case Size(WxHxD):Weight(Approx.):Tx 144 - 146 MHz or 144 - 148 MHzRx 144 - 146 MHz or 137 - 174 MHz5/10/12.5/15/20/25/50/100 kHz±600 kHzBetter than ±10 ppm [–4 °F to +140 °F (–20 °C to +60 °C)]F2/F350 Ohms, unbalanced13.8 V DC ±15%, negative groundRx: less than 0.7 A, less than 0.3 A (squelched)Tx: 10 A (65 W)/7 A (25 W)/5 A (10 W)/4 A (5 W)–4° F to +140° F (–20° C to +60° C)6.3” x 2.0” x 7.3” (160 x 50 x 185 mm) (w/o knobs)4.0 lb (1.8 kg)TransmitterOutput Power:Modulation Type:Maximum Deviation:Spurious Radiation:Microphone Impedance:65 W/25 W/10 W/5 WVariable Reactance±5 kHz/±2.5 kHzBetter than –60 dB2000 OhmsReceiverCircuit Type:Ifs:Sensitivity(for 12dB SINAD):Selectivity(–6/–60dB):IF Rejection:Image Rejection:Maximum AF Output:Double Conversion Superheterodyne21.7 MHz & 450 kHzBetter than 0.2 µV12 kHz/28 kHzBetter than 70 dBBetter than 70 dB3 W into 4 Ohms @10 % THDSpecifications subject to change without notice or obligation. Specifications guaranteed only within Amateur band2Exploded View & Miscellaneous PartsS8002057CASE-MAINS8002055PLATE-EARTHµCOM UnitS8002056REFLECTORS8002060FILTER-LCDS8002061CONNECT-LCDS8002062BUTTONS8002059CASE-FRONTS8101434LCDÂÂÂÂS8002064SPACERS8101435CABLE(with BLADE FUSE)S8101433SPEAKERS8002052KNOB-VOLRF ASSYS8002063CAP-SPÁS8002052KNOB-VOLÀÀÃÀÄÅÄÅÃÃÄÄÃÄÄÃÃÃS8101427CONNECTORÁÁS8002053KNOB-DIALÀÀS8002058COVER-BOTTOM ASSYÄÃÃÄÀScrew ListREF. VXSTD P/NDescriptionBOLT CAP M3x20 BZCTAPTITE SCREW 3x8ZCTAPTITE SCREW 3x10ZCWASHER-PLAINQty.634982FOOTBRACKETAccessoriesDescriptionVXSTD P/NS8002050S8002051Q0000075AAA43X001ÀÁÂÃÄÅU30308007 FLAT HEAD SCREW M3x8BS8002065S8002066S8002067S8002068BLADE FUSE ATC 15AMIC MH48A6JU44306001 TAPTITE SCREW M3x6CABLE ND-A35-2500CB S81014363Exploded View & Miscellaneous PartsNote4Block Diagram5
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