Icom IC-730 Instruction Manual page 12

ACC SOCKET CONNECTIONS
PIN No.
1. NC (no connection)
2. 13.8 Volts DC in conjunction with the power
switch operation.
3. Connected to Push-to-talk, T/R change-over
switch. When grounded, the set operates in
the transmit mode.
4. Output from the receive detector stage. Fixed
output regardless of AF output or AF gain.
5. Output from Transmitter MIC amplifier stage.
(Input for MIC gain control stage.)
6. 8 Volts DC available when transmitting. (relay
can not be directly actuated. Max.5mA).
7. Input for external ALC voltage.
8. Ground
9. NC
10. 8 Volts DC available when the 28MHz band is
selected.
11. Input for TRANSVERTER control. When 8
Volts DC is applied, set can operate with a
transverter.
12. Output reference voltage for band switching.
13. Output for external band switching.
14.~24. NC
Procedure for changing the MEMORY BACK UP (RL) terminal function.
1. Remove the top and bottom covers.
FUNCTION
ACC SOCKET CONNECTIONS
44. ANTENNA (ANT) CONNECTOR
This is used to connect the antenna to the set. Its impedance is
50 ohms and connects with a PL-259 connector.
45. GROUND TERMINAL
To prevent electrical shock, TV, BCI and other problems, be
sure to ground the equipment through the GROUND
TERMINAL. For best results use as heavy a gauge wire or strap
as possible and make the connection as short as possible, even
in mobile installations.
46. POWER SOCKET
For connection of the I C-PS15's DC power cord, or other
suitable power supply.
2. Remove the eight screws at each end of the rear
panel.
Turn over the rear panel rightside, and unplug
coaxial cables from J1 and J3 on the LPF board.
3. Change the plug P37 connection.
When P37 is connected to J1 on the ACC board
the terminal functions as MEMORY BACKUP
terminal.
When P37 is connected to J3, the terminal func-
tions as TRANSMIT/RECEICE control terminal
for an external set.
4. After changing connection, replace the coaxial
cables, rear panel an covers with reverse pro-
cedure.
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Outside view