External Keypad Connections; Band Voltage Modification - Icom IC-7100 Advanced Instructions

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19
MAINTENANCE

External keypad connections

Connect an external keypad to the MIC connector to
control the keyer memory (M1 to M4), RTTY memory
(RT1 to RT4) or TX voice memory (T1 to T4).
You can send a memory keyer, RTTY memory or voice
memory without selecting the screen of the CW memo-
ry, RTTY memory or voice memory.
When using a external keypad, set the "External Key-
pad" item of the "Connectors" Set mode, as described
below:
• For the CW memory keyer, set the "KEYER" item to
ON.
• For the RTTY memory, set the "RTTY" item to ON.
• For the TX voice memory, set the "VOICE" item to
ON.
An external keypad should be purchased separate-
ly.

Band voltage modification

The transceiver does not output the band voltage from
the [ACC] socket by default because there is no option
that the band voltage is required.
The band voltage is output from pin 5 of the [ACC]
socket after bridging the solder pad, as shown to the
right.
Or, you can output the band voltage by making the fol-
lowing band voltage generator circuit.
The following band voltage table is for reference only.
Please adjust and check with the actual operating re-
sults.
• Band voltage generator circuit
The circuit below is just for reference.
ACC socket of
an optional unit
GND
7 6
8V
1
3
4700pF
5 4
2
Diode
BAND
100µH
4700pF
4700pF
4.7k
ø
100µH Rotary
switch
1.9MHz
3.5MHz
VR 4.7k
ø
7MHz
4.7k
VR ø
10MHz
Open
10k 14MHz
VR
ø
18/21MHz
VR 10k
ø
24/28MHz
22k
VR
ø
S1
S2
S3
S4
USER BOX
External keypad
11
9 BAND
10
CP42
12
8
7
5
6
4
CP6106
1 CP6101 CP6102
3
2
Transceiver's bottom view with
the bottom cover removed.
BAND
External
1.9 MHz
power souce
8V
3.5 MHz
7 MHz
10 MHz
14 MHz
18/21 MHz
24/28 MHz
19-11
u
GND
MIC
w
U/D
1.5kø
± 5%
1.5kø
± 5%
2.2kø
± 5%
4.7kø
± 5%
BAND
Bridge here
CP42
VOLTAGE
No adjustment
6.1 V
5.1 V
No adjustment
4.1 V
3.1 V
2.1 V
i
q
11