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3 - 17
3-7-3 CPDL CPU (LOGIC UNIT; IC605)
39
CSTB
Outputs strobe signal to the band con-
troller (CTRL board; IC51; pin 1).
40
FSTB
Outputs strobe signals to the relay
controllers (CTRL board; IC55 and
IC56, pin 1).
41
DPSTA
Outputs strobe signals to the relay
controllers (BPF unit; IC101 and
IC102, pin 5).
42
DPSTB
Outputs strobe signals to the relay
controller2 (BPF unit; IC401 and
IC402, pin 5).
49
OSS1
Outputs the reference signal switching
signal.
High : Outputs reference signal.
50
OSS2
Outputs internal/external reference
signal select signal.
Low : The external reference signal
is selected.
52
OCS
Outputs chip select signal to adjust
the OCXO reference on the OSC unit.
53
RSTBA
Outputs strobe signals to the RX-A
circuit.
54
RSTBB
Outputs strobe signals to the RX-B
circuit.
55
DSONA
Outputs the DIGISEL-A unit control
signal.
56
DSAPA
Outputs the amplifier control signal to
the DIGISEL-A unit.
58
DSTBA
Outputs strobe signals to the
DIGISEL-A unit.
59
DSONB
Outputs the DIGISEL-B unit control
signal.
60
DSAPB
Outputs the amplifier control signal to
the DIGISEL-B unit.
61
DSTBB
Outputs strobe signals to the
DIGISEL-B unit.
63
MSTB1
Output strobe signals to the MAIN
64
MSTB2
unit.
65
ASTB1
Outputs strobe signal to the D/A con-
verter (MAIN unit; IC330; pin 15).
66
ASTB2
Outputs strobe signal to the D/A con-
verter (MAIN unit; IC331, pin 15).
67
DFRA
Outputs frame signal for data setting
to the DSP-A unit.
68
DFXA
Outputs frame signal for data reading
to the DSP-A unit.
70
VSQA
Input port for voice squelch control
signal from the DSP-A board.
High : Voice squelch is open.
71
RTDA
Input port for RTTY, BPSK and QPSK
decoded data signal from the DSP-A
board.
72
TNDA
Input port for the tone squelch control
or QPSK decoding data signals.
High : Tone squelch is open.
74
DULSA
Outputs unlock signal to the DSP-A
board.
High : Unlock.
77
DFRB
Outputs frame signal for data setting
to the DSP-B unit.
78
DFXB
Outputs frame signal for data reading
to the DSP-B unit.
79
VSQB
Input port for voice squelch control
signal from the DSP-B board.
High : Voice squelch is open.
81
RTDB
Input port for RTTY, BPSK and QPSK
decoded data signal from the DSP-B
board.
82
TNDB
Input port for the tone squelch control
or QPSK decoding data signals from
the DSP-B board.
High : Tone squelch is open
85
DULSB
Outputs unlock signal to the DSP-B
board.
High : Unlock.
86
DFRT
Outputs frame signal for data setting
to the DSP-TX unit.
87
DFXT
Outputs frame signal for data reading
to the DSP-TX unit.
90
DAVOX
Input port for the ANT VOX control
signal.
High : While receiving.
91
CTFL
Input port for the CW transmitting sta-
tus signal.
92
DFRS
Outputs frame signal for data setting
to the DSP-SCOPE unit.
93
DFXS
Outputs frame signal for data reading
data to the DSP-SCOPE unit.
94
DRESL
Output reset signals to the DDS and
95
DRESH
DSP ICs.
Pin
Port
Description
number
name
Pin
Port
Description
number
name
Summary of Contents for IC-7800
Page 1: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 65 VOLTAGE DIAGRAM 67 Dec 2009 ...
Page 79: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 60 VOLTAGE DIAGRAM 64 Feb 2009 ...
Page 157: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 57 VOLTAGE DIAGRAM 59 Aug 2008 ...
Page 245: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 57 VOLTAGE DIAGRAM 59 Jul 2008 ...
Page 333: ...THE TRANSCEIVER i7800 SERVICE MANUAL S 14015HZ C1 2 Mar 2006 ...
Page 555: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 14015HZ C1 2 C 2004 2006 Icom Inc ...