Icom IC-F40GT Service Manual page 40

SECTION 11 BLOCK DIAGRAM
Q13
IC6 2SC4116
TA75S01F
RIPPLE
S5V
Q14
FILTER
+5V BIAS 1.25V 2SK880
BUFF
LVIN
IC2 X1 IC1
TC75S51F
CR-667 SA7025
DRIVE LOOP
PLL IC
AMP FILTER
15.6 MHz FRACTIONAL N
TCXO
× 3
LPF
Q15
2SC4081
MOD
46.8 MHz
BPF
DSIN NOISE
W/N
A
IC13
M62364FP
FRCN
SPLO
MOD
T1
T2
D/A
T3
T4
IC17
LC73872M
D/A
OSCI
DTPD
DTMF
DECODE DTSD
DTAC
DDST SO SCL
SCK SDA
DAST
BEP1
D SIG1
F
REM
OPTION
UNIT CIRQ
SI
1
SO
RMUT
MCIN MMUT
AFON
OPV11
MCOT
OPV12
CTCS
PTIN OPV13
OPV21
PTOT
OPV22
OPV23
CCS
BEP2
C SCK
OPT11
SIG2
OPT12
E
OPTION
OPT13
UNIT
OPT21
2
OPT22
OPT23
MCIN
MCOT
PTIN
PTOT
11 - 1
Q9: DTC144EU
Q10: XP1214
VCO
VCOS
SW
Q11
2SC4226
Q8 Q6
2SC5107 2SC5107
RX VCO
D7
BUFF BUFF
1T365
MOD
Q12
Q7
2SC4226
2SC5107
TX VCO
BUFF
Q17 2SC4081
X2
Q16 DTA144EU
CDBCA450CX24
W/N W/N
SW
IC3
IF TA31136FN (D) Q18 FI1
2SC4215 FL-296
SECOND MIXER 47.25 MHz
XTAL
IF AMP
AMP
BPF
SQL AMP
DETECTOR
RSSI
FI2
D15
D16
SFPC450E
DAN202U DAN202U
CERAMIC
W/N W/N
BPF
SW SW
FI3
SFPC450G
CERAMIC
BPF
IC10
TA75S01F
HPF AMP
HPF AMP LPF
MSK MSK
HPF BPF LPF
DEMOD MOD
COMPRE-
AMP BUFF
SSOR
Q47
2SC4081
MCIN
IC27
M62334
TRD REGS1
MSKE REGS2
DIN RTM
SCK RDT
APST FCLR
X4
CR-563
3.58 MHz
IC21
TA75S01F
LPF
CTDA
Q40
XP1214
FIL
DUSE
Explanatory notes
SW
IC30 CONTROL LINE
TC7S66FU
Q41 Q44 COMMON LINE
DTC144EU DTC144EU
TX LINE
CTCSS
FIL
DTCS RX LINE
SW
SW
DATA RXDT
RESTO-
LPF RATION
IC31
TC75S51F
IC20B IC20A
NJM2904V NJM2904V
SDEC
DATA
LPF
MAIN UNIT
Q5 Q3
D4, D5: MA77
2SC5107 2SC3585
TX/RX YGR YGR
SW AMP AMP
ATT
D18 D19
Q19 HVC375B HVC375B
3SK206
BPF BPF
MIXER
T4 T3
Q27 Q26
2SK1829 DTC144EU
FIL FSW W/N W/N
SW
SW
Q23 2SB1132 R
Q24 XP6501
IC8 AFON
TC75S51F VCC AF AMP AFMT
REG
LPF
COMPANDER
IC9 TC35453F
AF
AMP
EXPAN- AMP
DER
IC13
IC5
DA1 TA7368F
SIG1, SIG2,
CTCS, TONE
HPF LPF AMP
IC7
TA75S01F
B
LIMIT
AMP
AMP
BEP1 BEP2
TONE BEEP
IC13
MCOT
DA2
POWER SW
F1
VCC
FUSE
Q32 2SB1132
IC12
Q33 XP6501
AN8005M
+5
+5V
REG +5
CPU
Q30 2SA1362
T5C R5C
R5
R5V
REG
BUSY
DTPD
DUSE
Q31 2SA1362
W/N
S5 FSW
S5V
REG
S5C
AFMT
SPCN
Q29 2SA1362
T5
T5V
REG
MAIN UNIT
Q2 Q1 D2,D3
D24, D25:
2SK2973 2SK2974 RB706F-40
PRE PWR
PWR
DET
DRIVE AMP
IC4
TC75S51F
APC
AMP
Q21
2SK1829 T4
RSSI
GATE
CTRL
D20 D21
HVC375B HVC375B
RF
BPF
BPF
AMP
Q20
3SK293
T2 T1
MICI
IN/EXT
MIC SW
IC28
IC13
TC7W53FK
DA3
IC19
TC4W53FU
PTT/MD1
SW
SPCN
Q6, Q7
PTIN
CPH3403
SP
Q8
G SW
2SC4081
PTOT
Q9
DTC144EU
12.288 MHz D27
IC18 TA75S01F X3 MA77
CR-681
SHIFT
VOX
SW
VOXT
RDB WRB RESB
LCD MODULE
D0–D7 RS
BATT IC1
CPU TC74VHC373FT
IC15
S-80942ANMP IC14
HD64F2238
RES
RESET KS0–3
D0–D7
EXPAND
FRST
CPU5V
KR0–3
IC23 RESB
BU4094BCFV SO
SCK
EXST
CB10
MSCK
CB11
MSO
CB12
CB13
EXP-
ANDER
CH
EEPROM EEPROM
SELECT
IC24 IC16 S1
HN58X2464TI HN58X2464TI EC10SP16-47
400-520 MHz
D1: 1SV307
MA77
ANT
LPF
SW
Q22
DTA144EU
TMUT
MUTE
SW
UNIVERSAL
CONNECTOR
MP6
CONNECTOR
VCC
XTXD, XRXD, RES
PTT
MIC
MIC+
AFOUT
DETECT
SP+
INT SP
SP–
IC2
MC1
TC75S51F
EM-140
INT MIC
MIC
MIC
AMP
PTT
F0
F1
KEY
F2
MATRIX
F3
Q1, Q2 VCC
2SC4116BL
DS1–4
KEY DS6–9
LED DS11–12
Q3 DTC144TE SW DS14–15
LN1371G-(TR)
BUSY VCC
LED SW
BUSY LED
DS13
Q4 DTC144TE
LMJ310M6RA
TX VCC
LED SW
TX LED
DS5
LN210C6ARA
FRONT UNIT