Midland-Alan_39_D80_ENG维修说明书手册含电气原理图

CERAMIC FILTER455KHzCERAMIC FIL TER10.7MHzlh cr3RF GAINRX FRONT END ICIF AMP2ND MIXER.FM IF AMPAM DEMOD.CTRL1ST BAL.MIXFM DEMOD,SQUELCHRX VCOU101UQ2.3.D2.5SQ.CTRLSPEAKERRUBBER ANT.L.P.HARMONICTX POWER AMP.TX DRIVER AMP.VOL.AUDIO AMPEXT.SPK JACKFILTERL12,30708CTRLU7 LM386JACK 1下5V REGULATORTX VCOLDT CTRLTX DC CTRLPLL IC.CPUFM MOD.U5011,12017U3.028,29不不不不LOW PASSFILTERQ16BATT.LOW不DETECTORPHASE LOCK LOOPFM HI/LO PWRSWITCHING8v2U4U5Q5LIMITINGD14,15PLL ENBDU/WATCHDC PWRQ17UP/DN CH.RESET04,6业业业亚2MIC AMP.CPU CONTROLLERAM POWERTX.MOD.Q14.15U6D11,32VR54.0MHZWAKE UPEXT.MIC/PTTQ27SOCKETAM LEDCON.MICJACK 2,L14 15MUL TIPLEXREDCOMMON SWLED2PTT SW024,25+ODC CHOKEREGULATORTX -DC SWTX LEDFMREDRX DC SWAMTX RXDC SWITCHING-0L8020,Z02Q18LED1Q19021,22DC 12V不不不Downloaded from www.cbradio.nl