Icom IC-F43GT Service Manual page 51

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SECTION 10
BLOCK DIAGRAM
X2
IC24:
CR-781
15.3 MHz
TA75S01F
BAL
LOOP
BUFF
TCXO
REF
FIL
Q22:
IC21:
2SC4116
LMX2352TM
PLL
X3
LPF
IC
IF IC
45.9 MHz
BPF
IC9:TA31136FN
X1
CERAMIC
BPF
FI2
SQIN
CDBC450CX24
CFWM450F
CFWM450F
450 kHz
DET
LVA,T1,T2
MOD
D/A
DET
AMP
IC12:
M62364FP
IC13:
TC4W53
MSK
LPF
FM/PM
IC6:
NJM12902
MOD
MSK
LPF
Modulator
CTCSS/DTCS
IC6:
NJM12902V
TONE
LPF
CTCSS/DTCS DEC
IC19:
IC19:
NJM12902
NJM12904V
DET
CDEC
LPF
AMP
IC6:
NJM12902V
SENC0-3
LPF
IC6:
NJM12902V
TENC
CENC0-2
LPF
Q40:
UNR9213J
FIL
DUSE
SW
10 - 1
S5V
Q20:
Q18: XP1214
2SC4116
RX VCO
Q19: UNR9213J
Q17:
2SC4226
VCO
RIPPLE
SW
FIL
D11:
HVC350B
LV
ADJ
Q15:
2SC5006
LV
BUFF
D13:
Q21:
HVC350B
2SK880
LV
BUFF
ADJ
TX VCO
Q14:
Q16:
2SC5006
2SC4226
BUFF
LVA
FM
D12:
MA368
MOD
Q7:
2SC4215
IF
AMP
SDEC
EXPANDER
AMP
LPF
SCRM
HPF
BLER
LIMIT
COMPRESSOR
AMP
AMP
MSK
IC14:
BPF
DE-Modulator
AK2346
X5
CR-765
OPTIONAL BOARD
3.6864 MHz
J5
D6:
MA77
SHIFT
CSFT
SW
X6
CR-774
19.6608 MHz
CPU
IC22: HD64F2238BTF13
RXC
Q29:
D16,D17:
Q704:
Q703:
MA77 ×2
2SC5006
2SC5107
2SC3585
TX/RX
PRE
PRE
BUFF
SW
DRIVE
DRIVE
Q4:
2SK1829
RSSI
GATE
ATT
CTRL
353.65 MHz-423.65 MHz
FI1:
D14:
D15:
FL-313
HVC350B
HVC350B
Q6:
3SK299
46.35 MHz
XTAL
BPF
BPF
BPF
Q5:
3SK293
MIXER
T2
G
F
C
T5C
R5C
Q26: 2SB1132
Q24:
Q25:
Q27: XP6501
2SA1577
2SA1577
S5C
S5
R5
R5V
T5
T5V
REG
VCC
REG
REG
+5
+5V
S5V
REG
IC17:
NJM2870
DS3:
FX–2721
DS1:
LNJ310M6URA
IC8:
S-80942CNMC-G9C
LCD
RES
DS2:
RESET
LNJ310M6URA
IC10:
24LC64T
IC20:
LC75834W
LCD
EEPROM
DRIVER
PA UNIT
Q702:
Q701:
D702:
RD01MUS1
RD07MVS1
RB706F
D701: 1SV307
DRIVE
PWR
DET
ANT
AMP
AMP
PWR
SW
IC16:
TA75S01F
APC
AMP
T2
D19,D20:
D24,D25:
HVC350B ×2
HVC350B ×2
RF
FUSE UNIT
BPF
BPF
AMP
VCC
T1
IC23:
NJM12904
IC15:
AF VOL
TA7368F
AF
LPF
AMP
BEEP
TONE
Q42: 2SB1132
Q41: XP6501
PWR
CTRL
CLI CLO
IC23:
NJM12904
Pre
AMP
EMPHA
D
Q43:
UN9112J
PTT
DET
NOTES :
KEY MATRIX
400-470 MHz
450-512 MHz
ANT UNIT
LPF
D29:
MA2S111
MUTE
SW
TMUT
F1
1
2
EXT SPEAKER
SP
MC1
PTT
EXT MIC
Rotary Selector
Voltage line
Contorol line
Common line
TX line
RX line
DATA lime

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