Power Supply Circuits; Port Allocation - Icom IC-V82 Service Manual

4-5 POWER SUPPLY CIRCUITS

4-5-1 VOLTAGE LINES
LINE
The voltage from the attached battery pack.
VCC
Common 5 V for the CPU (IC8) converted from the
CPU5
VCC line at the CPU5 regulator circuit (IC12).
Common 5 V line converted from the VCC line at the
SW5V SW5 regulator circuit (Q55–Q57, D39) controlled by
the "PWRON" signal.
5 V for the transmit circuits regulated from the SW5V
line by the T5 regulator (Q22).
T5
The regulator is controlled by the "T5C" signal from the
CPU (IC8, pin 80).
5 V for the power save line regulated from the SW5V
line by the PS5 regulator (Q54).
PS5
The regulator is controlled by the "PS5C" signal from
the CPU (IC8, pin 92).
5 V for the receive circuits regulated from the SW5V
line by the R5 regulator (Q21).
R5
The regulator is controlled by the "R5C" signal from
the CPU (IC8, pin 82).
5 V for the VCO circuit regulated from the SW5V line
by the VCO5 regulator (Q11).
VCO5
The regulator is controlled by the "PSVCO" signal from
the CPU (IC8, pin 62).
5 V for the optional unit power supply regulated from
the VCC line by the option power supply regulator
+5V (Q61, Q62, D51).
The regulator is controlled by the "OP_PS" signal from
the CPU (IC8, pin 59).

4-6 PORT ALLOCATION

4-6-1 CPU (IC8)
PIN PORT
NUMBER NAME
1 LVIN
3 REMO
4 SD
5 CTCIN
7 DET
8 LEDC
9 PTT
10 MICS
11 AN
12 DIGITAL
13 UN_SEC
15 CSHIFT
19 RESET
25 PWRSW
DESCRIPTION
DESCRIPTION
Input port for PLL lock voltage.
Input port for remote control micro-
phone.
Input por t for receiving signal
strength detect signal.
Input port for CTCSS/DTCS signals.
Input port for weather alert tone detect
signal.
Outputs LCD backlight control signal.
HIGH : Lights ON
Input port for [PTT].
Outputs AF filter switch (IC4) control
signal.
HIGH : While transmiting
Output ports AN switch (IC14) con-
trol signal.
Input port for UT-118 accept/refuse
signal.
LOW : Accept
Output ports UN_SEC switch (IC14)
control signal.
Outputs CPU (IC8) clock control signal.
Input port for "RESET" signal.
Input port for [PWR].
LOW : While pushing [PWR]
PIN PORT
NUMBER NAME
26 NOIS
28 ESDA
29 ESCK
30 CLIN
31 CLOUT
32 OPSO
33 SI
34 SECRET
35 BUSY
40–42 OPT1–OPT3
43 ALC
44 THROUGH
45 DI_SEC
46 MMUTE
49 RMUTE
52–54 OPV1–OPV3
55 TX_DIGI
56 PTTO
57 PTTI
58 D5VC
59 OP_PS
60 OPSCK
61 RX_MUTE
62 PSVCO
63 PLPS
64 DASTB
66 DADATA
67 PLLSW
68 PLLCK
69 PLLDATA
4 - 4
DESCRIPTION
Input port for "NOIS" signal.
I/O port for EEPROM (IC7).
Outputs clock signal for EEPROM
(IC7).
Input port for cloning data.
Output port for cloning data.
Outputs serial data for optional unit.
Input port for DTMF decode signal.
Outputs secret switch (IC14) control
signal.
Outputs receive detection (busy)
signal to UT-118.
I/O ports for optional unit.
Outputs ALC switch (IC13) control
signal.
HIGH : During digital mode operation.
Outputs ALC switch (IC13) control
signal.
HIGH : During analog mode operation.
Outputs moddulation/demodulation
mode switching signal.
HIGH : During digital mode operation
Outputs analog switch (IC4) control
signal.
Outputs audio mute signal.
HIGH : While muting
Input ports for optional unit type
detect signal.
Outputs transmit audio frequency
characteristic control signal.
LOW : During digital mode operation.
Input port for transmit request con-
trol signal from UT-118.
Output port for transmit request con-
trol signal to UT-118.
Output port for D5VC line (5 V power
supply; IC22) control signal.
HIGH : Power ON
Outputs option power supply (Q61,
Q62, D51) control signal.
HIGH : Power ON
Outputs clock signal for optional unit.
Input port for RX mute signal for
digital mode operation.
Outputs PS5 regulator (Q22) control
signal.
LOW : Power ON
Outputs power save control signal to
the PLL IC (IC19).
LOW : Power saved
Outputs strobe signal to D/A conver-
tor (IC10).
Outputs serial data to D/A convertor
(IC10).
Outputs PLL loop filter switch (IC20)
control signal.
Outputs clock signal to PLL IC (IC19).
Outputs serial data to the PLL IC (IC19).