Icom IC-FR3000 Series, Service Manual

Page: 83 / 136

3 - 7
Outputs the strobe signal for the PLL
IC on the RX unit.
Outputs the strobe signal for the PLL
IC on the TX unit.
Input port for the unlock signal from
the PLL IC on the TX unit.
Outputs the TX mute signal for the TX
unit.
Outputs the TX mute signal for the PA
unit.
Input port for the PTT switch signal
from the microphone.
Input port for the [SPMUTE] switch.
Input port for the [REMOTE] switch.
Input port for the [R/B] switch.
Outputs the BEEP signal for modula-
tion.
Input port for the [MONI] switch.
Input port for the [CHUP] switch.
Input port for the [CHDN] switch.
Input port for the [DISP] switch.
Input port for the [PROG] switch.
Outputs the antenna switching signal.
Outputs the CW signal for transmit.
Outputs the beep audio signals to the
speaker.
Outputs the master/slave switching
signal.
Input port for the master/slave switch-
ing signal.
Input port for the PTT signal form the
REMOTE connector.
Input port for PTT signal from the ACC
connector.
Input port for the memory channel
control signal.
Input port for the noise signal from the
FM IF IC (RX unit; IC2).
Outputs the temperature or PLL lock
voltage switching signal.
Outputs the 2/5 TONE and DTMF sig-
nals.
Outputs the CTCSS/DTCS signals.
Input port for the detection signal from
the REG unit.
Input port for FW SWR signal from the
PA unit.
RPLSTB
TPLSTB
TUNLK
TMUTE
TMUTE2
M_PTT
SPMUTE
REMOTE
R/B
MBEEP
MONI
CHUP
CHDN
DISP
PROG
COAXSW
CWO
KBEEP
M/SO
M/SI
E_PTT
E_PT2
D0–D4
NDET
SW
2/5T
DTMFO
CTDTO
PSD
FWSWR
1
2
3
4
5
8
9
10
11
13
15
16
17
18
19
26
27
28
29
30
33
34
35–39
40
41
43
44
45
46
Pin Port
Description
number name
3-6-6 CPU (LOGIC UNIT; IC33)
Input port for the TONE signal from
the ACC connector.
Outputs the adjusted external TONE
signal.
Outputs the TX AF signal to the TX
modulation.
Input port for the AF signal.
Input port for the strobe signal.
Input port for the clock signal.
Outputs the serial data signal to the
CPU (LOGIC unit; IC33).
Input port for the TONE signal.
Outputs the adjusted TONE signal.
Outputs the TX power control signal.
Outputs the adjustment signal for the
TX unit PLL reference frequency.
Outputs the control signal for modula-
tion balance.
Input port for the mixed signal with the
external signal, TX AF signal and
internal signals.
Outputs the adjustment signal for
TONE balance.
Outputs the adjusted AF signal for the
TX modulation.
Input port for the mixed signal with the
ETONE, TX AF and TONE signals.
ETONE
ETONEO
TXAFO
TXAF
DA1STB
SCK
SDTO
TONE
TONEO
PCON
TVCON
MODC
MIXO
REFMOD
MOD
MIXO
1
2
3
4
6
7
8
9
10
11
14
15
21
22
23
24
Pin Port
Description
number name
3-6-5 D/A CONVERTER IC (TX UNIT; IC5)