DX-440-(Service-Manual维修手册含电器原理图)

DeiyNoi CoryPEALISTCServiceManual20-2210DX440AM/FM DIRECT ENTRY COMMUNICATIONS RECEIVERCATALOG NUMBER:20-221DCONTENTSSpecifications..Disassembly Instructions............Block Diagram.......Circuit Descriptions.....6-12(1)IC402-HPD7503G-A65 (One chip #-com.).6(2)Keyboard Matrix........(3)Liquid Crystal Display (LD-BU 7140J)........(4)IC 401-CX-7961A-1 (Frequency Synthesizer PLL)(5)IC101-PC1018C (AM FM IF Amp)...11(6)IC102-LA5003 (Regulator)..........11(7IC201-LA3361 (FM MPX Demodulator).......11(8)IC202-TA7366P (Signal Strength,LED driver).2(9)IC203-M6900L (Pre-Amp).......12(10)IC301-PC1263C24PC1316C (Power Amp).12Alignment Instructions.....1324(1)Alignment for Power Supply VDD.......3(2)Alignment for Clock Time Accuracy...14(3)Alignment for VC01 Voitage Range.(4)Afignment for PLL Frequency...(5)Alignment for AM 2nd Local OSC..17(6)Alignment for AM 2nd IF..(7)Alignment for FM IF......(8)Alignment for AM Sensitivity.20(9)Alignment for BFO....21(10)Alignment for Signal Level Stop Level........22(11)Alignment for MPX........23(12)Alignment for FM Sensitivity24Troubleshooting Flow Chart.......42527Wiring Diagram-Solder Side......28P.C.Board Top Bottom Views...........29-33(1)PCB A-1 Top Bottom Views(2)PCB A-2 A-3 Top Views.........30(3)PCB A-2 A-3 Bottom Views.31(4④PCBB&C Top Views.32(5)PCB B C Bottom Views.................3334Part List for Exploded View....................43536Before Electrical Parts List..37Electrical Parts List.....,38-50Tables of ICs'Transistors'Voltage List......51-56Semiconductor Lead Identifications...........Schematic Diagram................