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7
TN1D
Outputs [TUNER] LED control signal.
Low : While tuning.
8
TN2D
Outputs [TUNER] LED control signal.
Low : While the antenna is tuned.
9
VOXD
Outputs [VOX/BKIN] LED control sig-
nal.
Low : While using the VOX/break-in
function.
10
MAGD
Outputs [AGC VR] LED for main band
control signal.
Low : When setting the AGC with
[AGC] control for main band.
11
MNRD
Outputs [NR] LED control signal.
Low : When the noise reduction is
used in main band..
12
MNBD
Outputs [NB] LED control signal.
Low : When the noise blanker is
used in main band.
13
SAGD
Outputs [AGC VR] LED control signal.
Low : When setting the AGC with
[AGC] control for sub band.
14
SNRD
Outputs [NR] LED control signal.
Low : When the noise reduction is
used in sub band.
15
SNBD
Outputs [NB] LED control signal.
Low : When the noise blanker is
used in sub band.
16
CFBD
Outputs CF memory card accessing
indicator control signal.
Low : When the transceiver read-
ing/writing data from/to the
CF memory card.
17
STBD
Outputs [POWER] LED control signal.
Low : While the main power is ON
and the transceiver’s power
is OFF.
Pin
Port
Description
number
name
3-7-34 SERIAL/PARAMETER IC
(DISPLAY BOARD; IC7)
3-7-35 EXPANDER IC (DISPLAY BOARD; IC1)
1
MAGL
Input port for [AGC] control signal for
main band.
2
SAGL
Input port for [AGC] control signal for
sub band.
4
SSQL
Input port for [SQL] control signal for
sub band.
5
MSQL
Input port for [SQL] control signal for
main band.
12
DELL
Input port for [DELAY] control signal.
13
MICL
Input port for [MIC] control signal.
14
PWRL
Input port for [RF] control signal.
15
KYSL
Input port for [KEY SPEED] control
signal.
Pin
Port
Description
number
name
3-7-36 EXPANDER IC (DISPLAY BOARD; IC2)
1
MAFL
Input port for [AF] control for main
band signal.
2
SAFL
Input port for [AF] control for sub band
signal.
4
SRFL
Input port for [RF] control for sub band
signal.
5
MRFL
Input port for [RF] control for main
band signal.
12
SNBL
Input port for [NB] control for sub band
signal.
13
MNRL
Input port for [NR] control for main
band signal.
14
MNBL
Input port for [NB] control for main
band signal.
15
SNRL
Input port for [NR] control for sub band
signal.
Pin
Port
Description
number
name
3-7-37 EXPANDER IC (DISPLAY BOARD; IC3)
1
AVXL
Input port for [ANTI VOX] control sig-
nal.
2
BRIL
Input port for [BRIGHT] control signal.
4
MDGL
Input port for [DIGISEL] control for
main band signal.
5
CNTL
Input port for [CONTRAST] control
signal.
12
VOXL
Input port for [VOX GAIN] control sig-
nal.
13
MONL
Input port for [MONI GAIN] control sig-
nal.
14
CMPL
Input port for [COMP] control signal.
15
DRVL
Input port for [DRIVE] control signal.
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 ...