Block Diagram - Icom IC-F43GT Service Manual

SECTION 10

BLOCK DIAGRAM

X2
CR-781
IC24:
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
CENC0-2
TENC
LPF
Q40:
UNR9213J
DUSE
FIL
SW
10 - 1
S5V
Q20: Q18: XP1214
2SC4116 RX VCO Q19: UNR9213J
Q17:
2SC4226
RIPPLE VCO
FIL D11: SW
HVC350B
LV
ADJ
Q15:
2SC5006
LV
BUFF
D13:
Q21: HVC350B
2SK880
LV
BUFF
ADJ
TX VCO
Q14:
Q16:
2SC5006
2SC4226
BUFF
LVA
FM
D12:
MOD MA368
Q7:
2SC4215
IF
AMP
SDEC
EXPANDER AMP
LPF
SCRM
HPF
BLER
LIMIT
COMPRESSOR AMP
AMP
MSK IC14:
BPF
DE-Modulator AK2346
X5
OPTIONAL BOARD CR-765
3.6864 MHz
J5
D6:
MA77
SHIFT CSFT
SW
X6
CR-774
19.6608 MHz
CPU
IC22: HD64F2238BTF13
RXC
Q29: D16,D17: Q704: Q703:
2SC5006 MA77 ×2 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 RF
BPF BPF
AMP
BPF
Q5:
3SK293
MIXER
T2
G
F
BEEP
TONE
C
T5C
R5C
Q26: 2SB1132 Q25: Q24:
Q27: XP6501 2SA1577 2SA1577
S5C
S5 R5V T5 T5V
R5
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
ANT UNIT
Q702: Q701: D702:
RD01MUS1 RD07MVS1 RB706F D701: 1SV307
DRIVE PWR DET ANT
AMP AMP PWR SW
D29:
IC16: MA2S111
TA75S01F
APC
MUTE
AMP
T2
D19,D20: D24,D25:
HVC350B ×2 HVC350B ×2
FUSE UNIT
BPF BPF
F1
VCC
1
T1
IC23:
NJM12904 IC15:
AF VOL
TA7368F
AF
LPF
AMP
Q42: 2SB1132
Q41: XP6501
PWR
CTRL
CLI CLO
IC23:
NJM12904
Pre
AMP
EMPHA
D
Q43:
UN9112J
PTT
DET
Rotary Selector
NOTES :
Voltage line
Contorol line
KEY MATRIX Common line
TX line
RX line
DATA lime
400-470 MHz
450-512 MHz
LPF
SW
TMUT
2
EXT SPEAKER
SP
MC1
PTT
EXT MIC