Sharp_CB-4670_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 substitutionof parts,adjustments or to service the transmitter by any oneother than a person holding a commercial 1st or 2nd class radiooperator's license.Any change in the circuitry that would changeor violatethe technical regulations or type acceptance isprohibitedP.L.L.SYNTHESIZED 40 CHANNELCITIZENS BAND TRANSCEIVERMODELCB-4670CX-1(OptionalExtension Cord)INDEX TO CONTENTSSPECIFICATIONSRECEIVER ALIGNMENT...................11PARTS LAYOUT.,,,,,.。:···············TRANSMITTER AND MODULATORGENERAL DESCRIPTION...ALIGNMENT...··.,...,,,1112DESCRIPTION OF PHASE-LOCKED-LOOP (P.L.L.)SIGNAL/RF POWER METER ADJUSTMENT.···I3CIRCUITEQUIVALENT CIRCUIT OF INTEGRATEDWhat is P.L.L.?..........................CIRCUIT...........1419Frequency Synthesizer4CAUTIONS ON HANDLING MOS IC....···20Frequency Determining......TROUBLE SHOOTING GUIDE..............21~30FREQUENCY OF SYNTHESIS CHART.·.....··.6CHANNEL INDICATOR(LED9O1)...······31BLOCK DIAGRAM·,·,,.,,·:····,78RESISTOR ARRAY....ALIGNMENT POINTS.·,·····9SEMICONDUCTORS BASING.............32ALIGNMENTWIRING SIDE OF P.W.B0ARD...··..·.33~36EQUIPMENT REQUIRED10SCHEMATIC DIAGRAM...,......37≈38PHASE LOCKED LOOP (P.L.L.)CIRCUITHOW TO SET THE TRANSISTORS AND IC......39ALIGNMENT............................10REPLACEMENT PARTS LIST..............40~45SHARP ELECTRONICS CORPORATIONExecutive Office:10 Keystone Place,Paramus,New Jersey07652(201)265-5600Regional Offices Distribution Centers:10 Keystone PlaceParamus,New Jersey07652(201)265-560C21580 Wilmington Ave.,Long Beach,Calif.90810(213)830-4470U.S.Subsidiary of Sharp Corporation,Osaka,JapanParts Centers:P.0.Bo×664Paramus,New Jersey07652(201)265-5600P.0.Bo×20394Long Beach.Calif.90801(213)830-4470