Icom IC-F31GS Servise Manual

Also see for IC-F30GS: Instruction manual Service manual Instruction manual Service manual Instruction manual

Contents

Icom IC-F31GS Servise Manual Manual pdf 5 page image

2 - 1SECTION 2 INSIDE VIEWS• FRONT UNITBottom view• MAIN UNITTop view• MAIN UNITBottom viewKEY LED switch(Q1, Q2: 2SC4116)LCD module(DS10: EDMMU1FA0)Internal speaker switch circuit(Q6, Q7: CPH3403, Q8: 2SC4081,Q9: DTC144EUA)Expander IC(IC1: TC74VHC373FT)Antenna switching(D1, D25, D24: MA77D1 is bottom side)D/A converter(IC27: M62334FP)PLL IC(IC1: SA7025DK)Power amplifier(Q1: 2SK2974)Pre-drive amplifier(Q2: 2SK2973)YGR amplifier(Q3: 2SC4226)TX/RX switch(D5, D4: MA77)TX/RX VCO circuit3.58 MHz crystal(X4: CR-5633.579545 MHz)PTT/MD1 switch andINT/EXT microphone switch(IC19: BU4053BCF)2nd IF filter (450 kHz)(FI2: SFPCA450KE4A)(FI3: SFPCA450KG1A)Discreminator(X2: CDBCB450KCA24 450 kHz)T5 regulator(Q29: 2SA1362)R5 regulator(Q30: 2SA1362)S5 regulator(Q31: 2SA1362)+5 regulator(Q32: 2SB1132)Crystal oscillatorfor CPU clock(X3: CR-681 12.288 MHz)1st IF amplifier(Q18: 2SC4215)AF amplifier(IC5: TA7368F)RF amplifier(Q20: 3SK293)1st mixer(Q19: 3SK206)1st IF filter(FI1: FL-322 31.650 MHz)Splatter filter(IC7: NJM2902V)2nd mixer/IF detect/SQL amplifier(IC3: TA31136FN)D/A converter(IC13: M62364FP)DTMF decoder(IC17: LC73872M)CPU(IC14: HD64F2238FA13)Expander IC(IC23: BU4094BCFV)EEPROM(IC16, IC24: HN58X2464TI)Microphone amplifier/mute/compander(IC9: TC35453F)TCXO(X1: CR-66715.600 MHz )APC amplifier(IC4: TC75S51F)Power detector(D2: MA713)