Sharp_CB-4470_Service_Manual维修手册含电器原理图

SHARPSERVICE MANUALOUTSTANDING RECEPTION THE WORLD OVERWARNING'It is unlawful for the user to make any replacement or substitutiono Daris.adostmenis o 10 seTvice me Transmnitter by any oneother than a person holding a commercial 1st or 2nd class radiooperator's license.Any change in the circuitry that would changeor violate the technical regulations or type acceptance isprohibited.P.L.L.SYNTHESIZED 40 CHANNELCITIZENS BAND TRANSCEIVERMODELCB-4470This MODEL CB-4470 is fundamentally the same in circuitry design as the MODEL CB-4670 although it ex-n EOUIVALENT CIRCUIT OCOWTO SETTHETRANSISTORSAND ICand TROUBLE SHOOTING GUIDE are,refer to the counterparts of the MODEL CB-4670 SERVICE MANUAL.INDEX TO CONTENTSPECIFICATIONS2PHASE LOCKED LOOP (P.L.L.)CIRCUITPARTS LAYOUT…。3ALIGNMENT..10GENERAL DESCRIPTION.·······RECEIVER ALIGNMENT.,.,,,,,,.··,··,:,11DESCRIPTION OF PHASE-LOCKED-LOOP (P.L.L.)TRANSMITTER AND MODULATORCIRCUITALIGNMENT·.··What is P.LL.？……………。1112SCHEMATIC DIAGRAM.................13~14Frequency SynthesizerWIRING SIDE OF P.W.BOARD...........1518Frequency Determining5TRUTH TABLE FOR A RELATIONSHIP BETWEENFREQUENCY OF SYNTHESIS CHART······6THE CHANNEL NUMBERS AND P.L.L.DATA OUT.BLOCK DIAGRAM·······.7~8PUTS AND CHANNEL DISPLAY OUTPUTS..··19ALIGNMENT POINTS9SEMICONDUCTORS BASING..········20ALIGNMENTREPLACEMENT PARTS LIST.............21~26EQUIPMENT REQUIRED10SHARP ELECTRONICS CORPORATIONExecutive Office:10 Keystone Place,ParamusNew Jersey07652(201)265-5600Regional Offices Distribution Centers:10 Keystone PlaceParamus,New Jersey07652201)265-560021580 Wilmington Ave..Long BeachCalif.90810(213)830-4470U.S.Subsidiary of Sharp Corporation,Osaka,JapanParts Centers:P.0.Bo×664Paramus,New Jersey07652(201)265-5600P.0.B0x20394Long Beach,Calif.90801(213)830-4470