Icom IC-F4 User Manual

10 - 1
SECTION 10 BLOCK DIAGRAMS
10-1 IC-F3/S
OPTIONAL UNIT
MIC, AF, PTT, MM, RM, AFONOP, SIGOUT
PTT
PTT
CONT
MIC
R105, C133
COMMON LINE Rx LINE Tx LINE
MIC
AMP
IC3c
IC3b
HPF
IC4
ANALOG
SWITCH
IC3d
LPF
CTCSS
TONE
MMRM
5 V R5 S5
VCC
T5
Q18 Q21 Q20 Q22
AF REG
Q15
VCC
AF
AMP
IC5
SP
VR
MIC JACK
AF OUT
SP
CLONE DET
EXT. MIC
SP JACK
CHARGE
I. LIM
Q27
VCC
BATT
GND
POWER SWITCH
BUFFER
Q31, D27
5 V
PRE
ENPHA
REG.
+5
CPU
+5
REG.
R5
REG.
S5
REG.
T5
CPU 5 V
Q33 Q35
Q36
RESET
LPF
CTCSS DTCS DTMF MTONE
LPF
BUFFER
IC6
IC11
IC8
CPU.
X2
LCD
KEY
MATRIX
EEPROM
IC7
D/A
IC10
SD
NOIS
L16, L17
BPF
RF
AMP
IF
AMP
L18, L19FI1Q14
BPFBPF
BPF
Q13 Q12
FI2
SQL
(INSIDE)
IF DET IC
IC2
DET
BPF
L13, L25
30.6 MHZ
BUFFER
BUFFER BUFFER BUFFER
BUFFER
Q34
IC1
PLL IC
REF
X1
LOOP
FILTER
R33, R34, C48
Q7, Q8
VCO
Q6
Q4
Q5
T/R
SWITCH
D3, D4 Q3 Q2 Q1 D1, D8 L1, L2, L3
PRE AMP
PWR AMP
ANT
SWITCH
LPF
ANT.
IC3aQ9
APCI. SENS
VCC
J5
Q17

Icom IC-F4 Specifications

General

Brand	Icom
Model	IC-F4
Category	Transceiver
Language	English