Icom IC-FR3000 Service Manual page 14

3-6-5 D/A CONVERTER IC (TX UNIT; IC5)
Pin Port
number name
Input port for the TONE signal from
1 ETONE
the ACC connector.
Outputs the adjusted external TONE
2 ETONEO
signal.
Outputs the TX AF signal to the TX
3 TXAFO
modulation.
4 TXAF Input port for the AF signal.
6 DA1STB Input port for the strobe signal.
7 SCK Input port for the clock signal.
Outputs the serial data signal to the
8 SDTO
CPU (LOGIC unit; IC33).
9 TONE Input port for the TONE signal.
10 TONEO Outputs the adjusted TONE signal.
11 PCON Outputs the TX power control signal.
Outputs the adjustment signal for the
14 TVCON
TX unit PLL reference frequency.
Outputs the control signal for modula-
15 MODC
tion balance.
Input port for the mixed signal with the
21 MIXO external signal, TX AF signal and
internal signals.
Outputs the adjustment signal for
22 REFMOD
TONE balance.
Outputs the adjusted AF signal for the
23 MOD
TX modulation.
Input port for the mixed signal with the
24 MIXO
ETONE, TX AF and TONE signals.
Description
3-6-6 CPU (LOGIC UNIT; IC33)
Pin Port
number name
1 RPLSTB
2 TPLSTB
3 TUNLK
4 TMUTE
5 TMUTE2
8 M_PTT
9 SPMUTE
10 REMOTE
11 R/B
13 MBEEP
15 MONI
16 CHUP
17 CHDN
18 DISP
19 PROG
26 COAXSW
27 CWO
28 KBEEP
29 M/SO
30 M/SI
33 E_PT1
34 E_PT2
35–39 D0–D4
40 NDET
41 SW
2/5T
43
DTMFO
44 CTDTO
45 PSD
46 FWSWR
3 - 7
Description
Outputs the strobe signal for the PLL
IC (RX unit; IC4).
Outputs the strobe signal for the PLL
IC (TX unit; IC2).
Input port for the unlock signal from
the PLL IC (TX unit; IC2).
Outputs the TX mute control signal for
the TX unit.
Outputs the TX mute control 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-
ting.
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 the 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 the FW SWR signal from
the PA unit.