Icom IC F121S - Manual (Page 32)

SECTION 10 BLOCK DIAGRAM
DISC
MIC
AFO
BEEP
8V
MCOT
MIC
MOD
RSSI
MIXER
8V
CSFT
19.6608 MHz
BEEP
F
D
E
DET DISC
J6
MAIN UNIT FRONT UNIT
J1
CTCSS/DTCS DEC
5/2 TONE DEC
J1
BEEP0
AFANO
182.35 MHz-220.35 MHz
46.35 MHz
450 kHz
SQIN
DET
45.9 MHz
15.3 MHz
HVC362
D21
BAL
REF
136-174 MHz
TENC
NWC
AF VR
PWR
P0-P4
JACK
MIC
ACC
M62363FP-650C
IC6
BU4066BCFV
IC14
IC1 TA31136FN
CPU
NOIS
TMUT T2
T1 T2
AF ON
DATA LINE
RX LINE
TX LINE
COMMON LINE
CONTROL LINE
Explanatory notes
DUSE
TENC
TONE
RSSI
TX VCO
RX VCO
RXC
8V
LVIN
OPTION
IF IC
D/A
DISC
MCOT MCIN
SIGOUT SIG
MOD
EPTT
HORNO
DIM DIM
HORN
PTT
IN
8V
AFO
MIC
PTT
CLI CLO
SENC0-3
CENC0-2
RES
8V
VCC
CPU5 CPU5
HV
PWON
RXC
TMUT
VCC
8V
R8V
T8V
5V
CDEC
SDEC
P2
P1
P0
8V
AFVI
POSW
P3
RMUT
MMUT
TXC
SW
ANALOG
Q30 DTC144EU
Q26 2SA1577
REG
R8
2SK1829
Q1
CTRL
GATE
ATT
R59
2SC3356
Q8
AMP
DRIVE
DTC144EU
Q5
SW
W/N
DTC144EU
Q3
FIL
SW
AN78L05M
IC10
CPU5
REG
W2
2SJ144
Q31
SW
LINE
2SK880
Q18
BUFF
2SC5107
Q12
BUFF
2SC5107
Q11
BUFF
2SC5107
Q10
BUFF
J4
SML-311YT
DS2-10
CL-165
DS1
SP
P0
P1
P2
P3
POSW
R14
D30 DAN222
D29 MA2S111
Q36 DTC144EU
Q35 DTC363EK
MUTE
AF
LA4425A
IC8
AMP
AF
TA75S01F
IC15
AMP
PRE
D23 DA221
Q29 DTC114TU
Q25 2SD1664
REG
T8
TA7808F
IC9
REG
+8
Q28 XP6501
Q27 2SA1577
REG
+5
NJM12902V
IC16
HPF
HPF
ALFYM450F=K
FI2
CERAMIC
BPF
2SC4215
Q4
AMP
IF
FL-335
FI1
XTAL
BPF
TA75S01F
IC2
AMP
APC
3SK293
Q2
AMP
RF
BPF
HVC375B
D8
BPF
HVC375B
D4
BPF
HVC350B
D9
BPF
HVC350B
D10
BPF
3SK299
Q3
1SV239
D18
MOD
FM
NJM12902V
IC5
AMP
NJM12904V
IC5
AMP
CR-520
X1
CDBC450CX24
X1
CR-740
X2
2SC4116
Q34
X3
MB15A02PFV-1
IC4
IC
PLL LOOP
FIL
Q16 DTC144EU
Q15 XP1214
SW
VCO
2SC4116
Q17
RIPPLE
FIL
D16, D31 HVC376B
2SC4226 Q13
D33, D34 HVC376B
2SC4226 Q14
D14, D15
MA77
SW
TX/RX
RA30H1317[25W]
S-AV32[50W]
IC3
AMP
PWR
D41 MA77 [25W]
D6 MA77
D38 UM9401F [50W]
D5 MA77 [25W]
D3 XB15A407 [50W]
D2 UM9401F [25W]
SW
ANT
NJM12902V
IC16
RESTO-
RATION
MA77
D4
SW
SHIFT
S-80942CNMC-G9C
IC2
HD6433687A05FP
IC1
RESET
HN58X2416TI
IC3
EEPROM
BU2092FV
IC4
DRIVER
LED
Q24 DTC144EU
Q23 2SJ377
POWER
SW
D28 MA2S728
SW
MUTE
2SC4215
Q19
REF
1SS375
D1, D11
DET
PWR
NJM12902V
IC5
LPF
NJM12902V
IC5
LPF
NJM12902V
IC16
LPF
NJM12902V
IC16
LPF
NJM12904V
IC5
LPF
LPF
LPF LPF LPF LPF
10 - 1