Inside Views - Icom IC-F41GS Servise Manual

SECTION 2
• FRONT UNIT
Bottom view
Internal speaker switch circuit
(Q6, Q7: CPH3403, Q8: 2SC4081,
Q9: DTC144EUA)
KEY LED switch
(Q1, Q2: 2SC4116BL)

INSIDE VIEWS

• MAIN UNIT
Top view
Antenna switching
(D25, D24: MA77)
(D1: 1SV307)
Power detector
(D2, D3: RB706F)
Power amplifier
(Q1: 2SK2974)
Pre-drive amplifier
(Q2: 2SK2973)
YGR amplifier
(Q3: 2SC3585)
(Q5: 2SC5107)
TX/RX VCO circuit
3.58 MHz crystal
(X4: CR-563
3.579545 MHz)
LCD module
(DS10: EDMMUD1FA0)
Expander IC
(IC1: TC74VHC373FT)
• MAIN UNIT
Bottom view
AF amplifier
(IC5: TA7368F)
IF amplifier
(Q18: 2SC4215)
2nd mixer/IF detect
/SQL amplifier
(IC3: TA31136FN-D)
TCXO
(X1: CR-667
15.600 MHz )
T5 regulator
(Q29: 2SA1362)
R5 regulator
(Q30: 2SA1362)
D/A converter
(IC13: M62364FP)
S5 regulator
(Q31: 2SA1362)
+5 regulator
(Q32: 2SB1132)
Crystal oscillator
for CPU clock
(X3: CR-681 12.288 MHz)
2 - 1
D/A converter
(IC27: M62334)
APC amplifier
(IC4: TC75S51F)
2nd IF filter (450 kHz
(FI2: SFPCA450KE4A)
(FI3: SFPCA450KG1A)
TX, RX switch
(D5, D4: MA77)
IF discreminator
(X2: CDBCB450KCAY24 450 kHz)
PLL IC
(IC1: SA7025)
PTT/MD1 switch
(IC28: TC7W53FK)
INT/EXT microphone switch
(IC19: TC7W53FK)
RF amplifier
(Q20: 3SK293)
1st mixer
(Q19: 3SK206)
1st IF filter
(FI1: FL-296 47.250 MHz)
Splatter filter
(IC8: TA75S51F)
(IC7: TA75S01F)
Microphone amplifier/mute
/compander
(IC9: TC35453F)
DTMF decoder
(IC17: LC73872M)
CPU
(IC14: HD64F2238)
Expander IC
(IC23: BU4094BCFV)
EEPROM
(IC16, IC24: HN58X2464TI)