Kenwood TM-471A Service Manual

Contents

KENWOOD CORPORATION2967-3, Ishikawa-machi, Hachioji-shi, Tokyo, 192-8525 JapanKENWOOD U.S.A. CORPORATIONP.O. BOX 22745, 2201 East Dominguez Street, Long Beach, CA 90801-5745, U.S.A.KENWOOD ELECTRONICS CANADA INC.6070 Kestrel Road, Mississauga, Ontario, Canada L5T 1S8KENWOOD ELECTRONICS DEUTSCHLAND GMBHRembrücker Str. 15, 63150 Heusenstamm, GermanyKENWOOD ELECTRONICS BELGIUM N.V.Leuvensesteenweg 248 J, 1800 Vilvoorde, BelgiumKENWOOD ELECTRONICS FRANCE S.A.13, Boulevard Ney, 75018 Paris, FranceKENWOOD ELECTRONICS U.K. LIMITEDKENWOOD House, Dwight Road, Watford, Herts., WD18 9EB United KingdomKENWOOD ELECTRONICS EUROPE B.V.Amsterdamseweg 37, 1422 AC Uithoorn, The NetherlandsKENWOOD ELECTRONICS ITALIA S.p.A.Via G. Sirtori, 7/9 20129 Milano, ItalyKENWOOD IBERICA S.A.Bolivia, 239-08020 Barcelona, SpainKENWOOD ELECTRONICS AUSTRALIA PTY. LTD.(A.C.N. 001 499 074)16 Giffnock Avenue, Centrecourt Estate, North Ryde, N.S.W. 2113 AustraliaKENWOOD ELECTRONICS (HONG KONG) LTD.Unit 3712-3724, Level 37, Tower one Metroplaza, 223 Hing Fong Road, Kwai Fong, N.T., Hong KongKENWOOD ELECTRONICS TECHNOLOGIES(S) PTE LTD.Sales Marketing Division1 Ang Mo Kio Street 63, Singapore 569110TM-471A SPECIFICATIONSGENERALFrequency RangeTX ...................................................................................... C : 400~430MHz C2 : 440~480MHzRX ...................................................................................... C : 400~430MHz C2 : 440~480MHzMode .................................................................................... F3E (FM)Antenna Impedance ............................................................ 50ΩUsable Temperature Range ................................................ –20°C~+60°C (–4°F~+140°F)Power Supply ....................................................................... 13.8V DC± 15% (11.7~15.8V)Grounding Method .............................................................. Negative groundCurrentTransmit (max.) ................................................................ 13A or lessReceive (at 2W output) ................................................... 1.0A or lessFrequency Stability (–20°C~+60°C) ................................... Within ± 2.5ppmDimensions (W x H x D projections not included) ............... 160 x 43 x 137 mm / 6-5/16 x 1-11/16 x 5-13/32 inchWeight .................................................................................. Approx. 1.2kg / 2.6lbRECEIVERCircuitry ................................................................................. Double conversion superheterodyneIntermediate Frequency (1st / 2nd) ...................................... 49.95MHz / 450kHzSensitivity (12dB SINAD) ...................................................... Wide : 0.20μV or less Narrow : 0.25μV or lessSelectivity–6dB .................................................................................. Wide : 12kHz or more Narrow : 10kHz or more–60dB ................................................................................ Wide : 30kHz or less Narrow : 24kHz or lessSquelch Sensitivity ............................................................... 0.1μV or lessAudio Output (8Ω, 5% distortion) ........................................ 2W or higher (5% distortion)Audio Output Impedance ..................................................... 8ΩTRANSMITTERPower OutputHigh ................................................................................... 40WLow ................................................................................... Approx. 25WModulation ............................................................................ Reactance modulationSpurious Emissions .............................................................. –60dB or lessMaximum Frequency Deviation ........................................... Wide : ± 5kHz Narrow : ± 2.5kHzAudio Distortion (at 60% modulation) .................................. 3% or lessMicrophone Impedance ....................................................... 600Ω

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