Icom IC-F4021T Service Manual page 35

SECTION 11 BLOCK DIAGRAM
LVIN
15.3 MHz
IC7 X2
NJM12902V CR-783
LOOP
REF
FIL
BUFF TCXO
BAL
Q22 IC2
2SC5006 MB15A02PFV1
PLL
X3
IC
45.9 MHz
BPF
CERAMIC
BPF
SQLC
NOIS RSSI
AF
FI3
SFPC450H
MOD
MCGO
DISC
D/A
BEEPO
OPTION CONNECTOR
IC12
BEEP
M62364FP
MODI
CTCSS/DTCS
DECODE
Q39
XP4601
AF
LPF
IC6
LM2902PWR
LPF
D_IF
DAFO
Q40
UNR9213J
CTCSS/DTCS FIL
DMO
SW
OPTION
CONNECTOR
DMI AFOUT
DUSE
J5
SIGO BEPO
AXK540145J
AFON
BUSY
DS3
LCD
VREF
PTTO
PTTI
DISC
MCIN
MCOT
S5V
Q20
2SC4116
RIPPLE
BUFF
FIL D9 : HVC350B
RX VCO
D11: HVC350B
Q17
Q21
RLVA
2SC4226
2SK880
RLV
ADJ
LV
D10: HVC350B
TX VCO
D13: HVC350B
Q16
TLVA
2SC4226
TLV
ADJ
FM D12
MOD MA368
IF IC
IC9: TA31136FNG
Q9: DTA114EU
D2: DAN222 Q47
D3: DAN222 UNR9213J
CERAMIC
A/D W/N
SW BPF SW
X1
FI2 CDBKB450KCAY24
CFWM450F
450KHz
R5V DIGI NWC
IC5 Q32: 2SK3019 Q36: 2SK3019
NJM13403V Q33: UNR9213J Q37: UNR9213J
RXMUTE DAFO
HPF LPF
SW DAFO
AFOUT
RMUTE DIGI MMUTE DIGI
CTCSS/DTCS
IC6
LM2902PWR
SENC
LPF
S5
SW-167
MONI
MONI
CDEC
SW
S1
EVQ-PUL
EMER
EMER
SW
SDEC
KRO-3
KSO-4
KEY
MATRIX
IC7
NJM12902V
CPU
CENC0-2 X6 D6
REM MA2S077
CR-774
IC22
LPF
12.288MHz
IC10
HN58X2464TI
ESDA
IC20 ESCL
EEPROM
LC75834W
LCD
DRIVER IC8
BD5242G
RES
Q45: UNR9113J
DS1: LNJ310M6URA
DS2: LNJ310M6URA
R256
ERTJ0EP473J
LIGT
TEMP
LIGT
CPU5
+5V
11 - 1
Q18: XP1214
Q19: UNR9213J MAIN UNIT
R5V
TX/RX
SW S5V
D16:1SV307
D17: MA2S077
Q29
2SC5700
TX/RX
BUFF BUFF
SW
Q15
2SC5006
X2
Q14
2SC5700
BPF
353.65-423.65 MHz (400-470MHz)
LPF
403.65-465.65 MHz (450-512MHz)
403.65-473.65 MHz (450-520MHz)
Q7 FI1 D14: HVC350B
2SC5107 FL-335 D29: HVC350B
Q6
3SK324
46.35 MHz
IF XTAL
BPF
AMP BPF
MIX
IC23
M62334FP
TLVA
D/A
RLVA
SCK
DSDA
IC3
CD4066BPWR
RMUTE
SW
MMUTE
ANALOG
IC5 SW
NJM13403V
RMUTE
AF Q35
SIGO
MIX UNR9213J
TONE
SW
IC7 DMI
NJM12902V
OPTION CONNECTOR
DMO
AMP
DIGI
+5V
IC7
NJM12902V
BIAS +5V
BIAS
SHIFT CPU5
SW
Q26: 2SB1580
Q27: XP6501
Q28: UNR9213J
CSFT +5V
Q23
2SA1577
CPU5
+5V
S5
S5V
REG S5C
Q25: 2SA1577
Q48: UNR9213J
+5V
CPU5
RESET R5V R5
REG R5C
Q24: 2SA1577
CPU5
+5V
T5V T5
REG T5C
PA UNIT
Q704 Q703 Q702 Q701 D702
2SC5006 2SC3356 RD01MUS1 RD07MVS1 RB706F
PRE PRE
PWR
DRIVE
DRIVE DRIVE
AMP
AMP
IC701
TA75S01F
APCV
APC
AMP
D15 D19: HVC350B D24: HVC350B
HVC350B D20: HVC350B D25: HVC350B
RF
BPF BPF BPF
AMP
Q5
3SK293
Q46
T2 UNR9213J
T1
IC5
NJM13403V Q31: 2SK3019 IC25: TC7W53FK
Q34: 2SK3019
IC5 MIC A/D
HPF
Q35: UNR9213J
NJM13403V MUTE SW
GAIN
AMP
SW
MMUTE DIGI
DIGI
T5V
TONE IC6
LM2902PWR
AF VOL
BUFF
R315
TP76N00N
BEPO
AFON
BEEPO
AFON1
IC17
NJM2870
VCC
CPU5
CPU5
REG
CPU5
VCC
+5
Explanatory notes
REG
PWON
400-470 MHz
450-512 MHz
450-520 MHz
ANT
D701
1SV307
PWR ANT
LPF
DET SW
ANT UNIT
F701
0467003.NR
VCC CONNECT
1 2
APC
UNIT
BT3
BATTERY_1
R315
MUTE
SW
VCC
TMUT
EXT MIC
OPTION CONNECTOR
MCOT MCIN
J3
HSJ1102-018540
IC24: AN6123MS
MIC
MC1
ALC
SKB-2746
PTT SW
Q43: UNR9111J S2
PTTO
PTT
DET
PTTO PTTI
OPTION CONNECTOR
IC15
TA7368FG EXT SPEAKER
AF AFOUT J2
AMP HSJ1456-010320
SP
Q42: 2SB1132 CLONE
Q41: XP6501
D23: MA2S111
D21: DAN222
PWR
1
CTRL
SP1
2
J4
BM02B-ASRS-TF
Q44: UNR9210J
D28: RB706F
CLI
CLO CLONE
BUFF
CONTROL LINE
COMMON LINE
TX LINE
RX LINE
DATA LINE
+B LINE