Icom IC-V82 Service Manual page 11

PIN PORT
NUMBER NAME
70 PLLSTB
71 AFON
72 DUSE
73–76 KR0–KR3
78 UNLK
79 EMPHASIS
80 T5C
81 DEGI_W
82 R5C
83 TXC
86–90 KS0–KS4
92 PS5C
97, 98 DICK, DIUD
141 TONE
4-6-2 D/A CONVERTER (IC10)
PIN PORT
NUMBER NAME
Outputs the tunable BPF tuning signal.
2 T1 The output signal is applied to BPF (D9,
D11, D12).
Outputs the tunable BPF tuning signal.
3 T2 The output signal is applied to BPF (D11,
D12).
• Outputs the tunable BPF tuning signal.
The output signal is applied to BPF
(D65).
1 0 T3
• Output port for transmit output power
setting signal. The output signal is
applied to the APC amplifier (IC3, pin 3).
Outputs AF output signals to the AF ampli-
1 1 VOLOUT
fier (IC5).
Input port for DTCS signal from the DTCS
1 3 DTCS
amplifi er (IC23).
1 5 FC Outputs reference frequency control voltage.
Outputs modulating audio signal to the
2 2 MOD
modulator circuit (D61).
Outputs squelch control signal to the noise
active filter (IC2, pins 7, 8; R86–R88,
2 3 SQLIN
C121, C122).
DESCRIPTION
Outputs PLL strobe signal.
Outputs AF regulator (Q15, Q16)
control signal.
HIGH : While emitting audio
Outputs LPF cut-off frequency control
signal to the CTCSS switch (Q38).
LOW : When CTCSS or no signal-
ing system is in use.
HIGH : DTCS is in use.
Input ports for keypad.
Input port for PLL unlock signal.
Outputs emphasis switch (Q73) con-
trol signal.
HIGH : During FM mode operation.
Outputs T5 regurator (Q22) control
signal.
LOW : While transmitting
Outputs detect circuit (Wide/Narrow)
switch (Q53) control signal.
HIGH : During narrow mode operation.
Outputs R5 regulator (Q21) control
signal.
LOW : During receive
Outputs RF output power control
signal.
LOW : During transmit
Output ports for keypad.
Outputs PS5 regulator (Q54) control
signal.
LOW : Power saved
Input port for [VOL] control (S801).
Outputs DTMF, BEEP, 1750 Hz tone
signals, etc.
DESCRIPTION
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