4-6-2 MAIN CPU (FRONT unit; IC401)
Input port for the PTT switch detection
signal.
Low: While the PTT switch is
pushed.
Input ports for the key return A/D
signals.
Input port for the detect signal for
connecting battery pack’s voltage.
Input port for the PLL lock voltage.
Input port for the S-meter signal from
the FM IF IC (MAIN unit; IC1, pin 12).
Input port for the transceiver’s internal
temperature detecting signal.
Input port for the optional microphone
determine signal.
Input port for the PLL unlock signal.
Low: The PLL circuit is unlocked.
Outputs serial data control signal to
the base band IC (MAIN unit; IC10,
pin 14)
Output single tone encoder signal.
Outputs the cloning data signal.
Input port for the cloning data signal.
Input port for the receiving MSK
detection signal from the base band
IC (MAIN unit; IC10, pin 12)
Output the CTCSS/DTCS signals.
• Outputs strobe signals to the D/A
convertor (IC6, pin 6).
• Input port for the connecting battery
type detect signal.
Output common signal to the LCD
display.
PTT
KR1
KR0
BATV
LVIN
RSSI
TEMP
OPTV
ULCK
MDIR
SENC3–
SENC0
CLO
CLI
MRDF
CENC2–
CENC0
DAST
COM4–
COM1
45
46
47
48
49
50
51
52
55
71
72–75
76
77
78
79–81
82
88–91
1–11,
13,
15–25,
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
43
44
SEG23–
SEG13,
SEG12,
SEG11–
SEG1
SO
SCK
MDIO
MSCK
SCST
PLST
ESDA
ESCL
SCAT
EXSF
EXSM
EXOE
BEEP
MTDT
MTCK
NOIS
SDEC
CDEC
Output segment data to the LCD
display.
Outputs serial data to the PLL IC
(MAIN unit; IC6, pin 8) and D/A
convertor (MAIN unit; IC6, pin 8).
Outputs serial clock signal to the
PLL IC (MAIN unit; IC4, pin 9), D/A
convertor (MAIN unit; IC6, pin 7), etc.
I/O port for the serial data signals
from/to the base band IC (MAIN unit;
IC10, pin 11).
Outputs clock signal to the base band
IC (MAIN unit; IC10, pin 13).
Outputs strobe signals to the scrambler
IC (MAIN unit; IC14, pin 11).
Outputs strobe signals to the PLL IC
(MAIN unit; IC4, pin 11).
I/O port for data signals from/to the
EEPROM (IC409, pin 5).
Outputs clock signal to the EEPROM
(IC409, pin 6).
• Outputs power down control signal
to the scrambler IC (MAIN unit;
IC14, pin 12).
• Input port for the detection signal
whether the scrambler unit is
installed or not.
Outputs strobe signals to the
expander IC (IC410, pin 2).
Outputs strobe signals to the
expander IC (MAIN unit; IC12, pin 1).
Outputs the enable signal to the
expander ICs (IC410, pin 15 and
MAIN unit; IC12, pin 15).
Outputs beep audio signals.
Outputs MSK data for transmitting to
the base band IC (MAIN unit; IC10,
pin 10).
Input port for the transmitting MSK
clock signal from the base band IC
(MAIN unit; IC10, pin 9).
Input port for the noise signal from the
FM IF IC (MAIN unit; IC1, pin 13).
Input port for single tone decode
signal from the base band IC (MAIN
unit; IC10, pin 21).
Input port for CTCSS/DTCS signal
from the amplifier (MAIN unit; IC5, pin
8).
Pin Port
Description
number name
Pin Port
Description
number name
4 - 6
Summary of Contents for VHF IC-F50
Page 1: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 6 VOLTAGE DIAGRAM 8 Feb 2008...
Page 10: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 6 VOLTAGE DIAGRAM 8 Aug 2007...
Page 20: ...S 1407IZ C1 e Dec 2006 VHF TRANSCEVER...
Page 57: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 14007IZ C1 e 2003 2006 Icom Inc...