Icom IC-F4001 Service Manual page 28

SECTION 9. BLOCK DIAGRAM
Q17
2SK880
LVIN
BUFF
15.3MHz
IC60 X2
NJM12902 CR-794
BAL
LOOP
VCON
TCXO
BUFF
FIL
REF
Q26 IC2
2SC4116 M B15A02
PLL
X3 LPF
IC
IF IC
45.9MHz
BPF
I C3:NJM2591
D31:D32 FI2
1SS390 LTM450GW
CERAMIC
W/N
D/A
SW BPF
SQIN
FI3 450kHz
LTM450HW
CERAMIC
DISC W/N
BPF
SW
REF,LVA 450kHz
T1,T2
R132
IC58
VOL1 NJM12902
Splatter
LPF
R132
CTCSS/DTCS
VOL1
IC59
LM2902
IC57
LPF
R2A20178
IC60
NJM12902 IC61:CD4053
BEEP SENC
LPF
SW
Q51
CTCSS/DTCS DEC XP4601
DISC
LPF
IC59
LM2902
CENC0-2
LPF
Q52
S54
LDTC144EE TP70TF5169
DUSE FIL
SW SELECT
D52
1SS390
SHIFT
SW
9 - 1
S5V
Q15
2SC4116
RIPPLE
FIL D11
HVD376B RX VCO
Q13:2SC4226
LV D12:HVD350B
ADJ
LV
D14
HVD376B TX VCO
LVA LV
ADJ
Q14:2SC4226
D16:HVD350B
D15
1SV309 Q12:LDTC144EE
FM VCO R5C
MOD SW
Q25
LDTC144EE
X1
W/N
RSSI NOIS SW
JTBM450CX70
D33,D34:1SS390
Q27:LDTA144EE
NWC IC59
LM2902
LPF
IC56
CD4066
SW12
RBEEP
IC52
R1EX24016
EEPROM
T5C
IC61
CD4053
BEEP BEEP
SW
SDEC
R88
TEMP
AF VOL
CPU
AFVI
CDEC
IC51
PTT
IPTT
PUSH1
F1
P1
R4F20102
KEY1
P2
PUSH1
KEY2
PUSH1
F2
IC53
N JU7704
RES
RESET
CSFT CPU5
Q82:Q83
X51
LDTA144EE YG
CR-864
CTRL
12.288MHz HR
DS51
CL-165HR
Q11:LDTC144EE
VCO
R5V
SW
Q10 Q8 D5:HVD142A Q4
2SC5107 2SC5107 D6:HVD142A 2SC5107
TX/RX PRE
BUFF BUFF
SW AM P
Q9
2SC5107
BUFF LPF
353.65 MHz-423.65 MHz
Q24 FI1 D28 D28
2SC4215 FL-442 Q23 HVB350B HVB350B
46.35MHz 3SK293
IF XTAL
BPF BPF
AM P BPF
MIXER
T2
RMUT 1
IC58 IC62
NJM12902 CD4066
RX
HPF
MUT E
RMUT 1
S1 MMUT
S2
SW12
IC58 IC58 IC62
NJM12902 NJM12902 CD4066
SW12
MMUT
ANALOG MIC
AM P HPF
SW MUTE
RMUT 2
S3
S4
AFO IC60
D 53:L1SS400
T5V NLM12902
SW12
VOXV
DET AMP
MOD
TBEEP
Q73
KTA2015
T5C
T5 T5V
REG
Q74:2SB1132 Q72
Q75:XP6501 2SA1586
Q76:LDTC144EE R5C
PWON R5 R5V
+5V REG
VCC REG
Q71
KTA2015
S5 S5V
S5C
REG
+5V
IC54
NJM2871
CPU5 CPU5
REG
S5 F51
12
VCC
SW12
ERBSE3R00U
Q1
Q2
Q3
RD07MUS2B
2SC3356 RD01MUS1
PRE PWR
DRIVE
LPF
DRIVE
AM P AM P
Q21 IC1
2SK1829 TA75S01F
RSSI AGC APC
AMP T1
CTRL
D26 D24
HVB350B HVB350B
RF
BPF BPF
AM P
Q22
3SK293
T1
Q58:UNR911HG0
EPTT PTT
DET
IC60
NLM12902 Q59:LDTC144EE
ATX AUTO_TX
AM P
CTRL
MGC0
IC62 MIC_GAIN
CD4066 MGC1
CTRL
IC55 TPA0211DGN
AF
AFO
AM P
AF
AM P
AFON
Q63:2SB1132
Q64:XP6501
AFON
PWR
CTRL
VCC
D51:LRB706F
Q81:UNR9210G0
CLONE
BUFF
400-470MHz
D3:HVD142A
D 22:HVD142A
ANT
LPF
SW
D1:RB886CS
PWR
D2:RB886CS
DET
Q6
LDTA144EE
MUTE TMUT
SW
J51
MC51
EM9745P
J52
J53
SP1
1
2