Sharp_CB-2260_Service_Manual维修手册含电器原理图

SHARPSERVICE MANUALOUTSTANDING RECEPTION THE.WORLD OVERodel CB-14640 ChannelC.B.TransceiverMODELCB-2260"WARNING"It is unlawful for the user to make any replgulations or type acceptance is prohited.SPECIFICATIONSTransmitter section2nd-IF:455kHzRF power output..........4W (maximum)Circuit type.Dual conversion superheterodyne:Frequency range.............27MHz Citizens BandP.L.L.circuit frequency synthesizerChannels .................40 chs.P.L.L.(Phase Locked Loop)provides 40circuit Synthesizertransmit and receive channels.Type of crystal............HC-18UDelta tuning of t1.0kHz on eachTolerancechannels plus ceramic filter.10.240Mz.....±0.0049%Auxiliary circuits...........Automatic noise limiter (ANL),Others.。·.±0.003%Variable squelchTransmitter modulation...100%(maximum)Public Address System (P.A.)Modulation limiter.........Yields high average modulation ataverage voice levelsGeneralAntenna matching...........Nominal 50 ohmsPower source .............DC 12.0V NominalCarrier deviation .............Not greater than 800Hznegative or positive groundnominal on (exceeds F.C.C.Antenna....................50 ohm external antenna for car or baseD.O.C.,etc.requirements)operationHarmonic suppression......Exceeds 60dBSpeaker..3-1/8"P.D.S.8-ohm Imp.Receiver sectionMicrophone..............Press-to-talk dynamic microphoneAudio power output......3.5 Watts maximum power output(500ohm)Sensitivity.............0.7uV/m for 10dB S N/N ratioAccessories.......Microphone hangerat 30%at 1000Hz modulationMobile mounting bracketChannels....40 chs.P.LL.(Phase Locked Loop)Mounting screwscircuit SynthesizerMicrophone with plug and cord.Type of crystal......HC-18UPower supply cord with fuse holder andTolerancesocket.11.730MHz.±0.003%Spare fuse(2.3A)Selectivity.............6dB down at 3Hz;Dimensions,2-1/4"(D×5-3/4"W0×7-7/8"(D)S0 dB down at±1okHzWeight..........4 Ibs.with microphoneIntermediate frequency....1st-IF:11.275MHz,Cabinet....Metal body with plastic frontSHARP ELECTRONICSCORPORATIONExecutive Office:10 Keystone Place,Paramus,New Jersey07652(201)265-5600Regional Offices Distribution Centers:10 Keystone Place,Paramus,New Jersey07652(201)265-560021580 Wilmington Ave.Long Beach,Calif.90810(213)830-4470U.S.Subsidiary of SHARP Corporation,Osaka,Japan