DX-390_Service_Manual维修手册含电器原理图

REALISIICServiceanual20-214DX-390AM/FM WORLD-BANDPORTABLE RADIOCatalog Number:20-214CONTENTSSpecifications.2-5Disassembly InstructionsB引0 ck Diagram"6Alignment Instructions........................8-20Alignment For Clock Time Accuracy....Alignment For PLL Frequency...,8Alignment For AM 2nd Local OSC .........9Alignment For AM 2nd IF.........1011Alignment For FM IF........Alignment For AM Sensitivity ................…12Alignment For BFO............13Alignment For FM Sensitivity…14Alignment For MPX…..15.16Alignment For Indication Level of Battery.........17Alignment For Signal Strength Level.....18Alignment For 450kHz Trap ......19Alignment For FM Station Detection.............20Troubleshooting Flow Chart.................21-23Wiring Diagram…24Main PCB Chip Side View..................Main PCB Top View..Control PCB Chip Side View ...........26Control PCB Top View.2.28Electrical Parts List…Semiconductor Lead Identifications......…29-4343Exploded View...44Mechanical Parts List.........45IC Circuit Block DiagramICS'&Transistors'Voltage List.46-49.50-55Schematic Diagram .........56-57