Block Diagram - Icom IC-F4TR Service Manual

SECTION 10

BLOCK DIAGRAM

CLONE
SP JACK
Q31, D27
BUFF
SP
SP
TXD
VCC
RXD
Q15,Q16
AFON
AF
AFMT
REG
VOL BOARD
AFOUT
AF
AMP
IC5
J5 FLASH WRITER VOL
30 EXTDC
1
CTCSS
CLR/CODE
29
2
PTTOUT
OPTB
28 DETIN
3
PTTIN
27 XTXD
4
MICOUT
26 XRXD L422
5
MICIN
25 RES
6
DETOUT
DETOUT
24 MD1
7
DETIN
VCOSW
23
8
VCC
22
T5
9
FL
21
5V
10
SN RX
20 AFMT
11
PT
19
12 G
SN TR
RXOUT
18
G RXIN
13
TXDATA
17
14 G
RXOUT
16 TONE
15
RXIN
MICOUT
MICIN
IC21
MIC
MIC
Q17
MUTE
PTT
SW
W1
5V
OPT
HVD
EXT MIC
MIC JACK
10 - 1
IC22 X1 REF IC1
AMP TCXO
PLL IC LOOP
FILTER
15.6 MHz
FRQCON
LPF
MOD
MODCON
BAL
Q11
× 3
X3
IC2
DET
IF DET IC
SQL BPF
Q407
FI2
W/N
SW
IC3A IC3B IC4
W12
DE-
HPF
HPF
ENPHA
IC3C
ANALOG
MIC
SW
AMP
IC25
W2
PRE-
HPF
ENPHA
Q420
Q425
W/N
FILSW
SEPARA- SW
TER
DEV
DTMF
I.LIM
Q27, D24, D25
CHARGE
IC23
1/2
5V BATT
VDD
GND
POWER SW
Q8
RX
Q6 Q4 D3, D4 Q403 Q3
TX/RX PRE
BUFF BUFF BUFF
Q7
DRIVE
SW
TX
Q5
BUFF
VCO
ATT
Q34
LVIN
BUFF
Q415
W/N
SW
Q400, D402 FI1 D401, D11, D12 Q12
Q13
IF
BPF BPF
AMP
Q427
D411 FI3 D410
W/N
W/N AGC
BPF
SW SW
CTRL
RSSI
NOIS
Q405
MAIN
FILSW
IC24 IC16 IC12
ANALOG
DTMF
LPF
SW
IC3D
Q426 IC13
LPF
X4
ANALOG
W/N
3.58 MHz
SW SW
IC20
TEST
MIX
IC15
DTMFSO
DTMF
ENCODE DTMFCK
DTMF
BEEP
Q21 Q18, Q19
VCC
R5 REG 5V +5
R5 R5C
REG
Q20
S5 REG
S5 S5C CPU5
Q22
T5 REG
T5 T5C
Q2 Q1 D1, D8, D406
ANT
DRIVE PWR
LPF
AMP AMP SW
IC19 D2
PWR
APC
DET
D10
RF
BPF
AMP
VCC
Q9
IC10
D/A I.SENS
CSHIFT
D409
RXDATA
CLOCK
SHIFT
IC17
LCD DRIVER
CPU
CTCSS
DTCS
X2
W13
LSD
9.8 MHz
RES
KEY
MATRIX
EEPROM
IC6 IC11, Q23, D15
IC7
+5
RESET
CPU
VCC
ANT
DS1
IC18
LCD
COMMON LINE
RX LINE
TX LINE