Function of Major Controls

Troubleshoot and Repair Communications System Control
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Function of major controls.

The SELECTOR switch (S1) is located in the center of the front panel. It has six

positions.

(1)

FM transceiver.

(3)

UHF transceiver.

(4)

Not used.

(5)

Second FM transceiver.

NOTE:

You can transmit and monitor without interfering with other crew members in

these positions. Positions 1 through 5 are used when selecting radio

transceiver operation.

(6)

Interphone communications system (ICS). This position is used to communicate

within the aircraft without interfering with incoming calls and without having to overcome the

noise of the aircraft engines. The ICS position does not select a transceiver, nor does it allow

you to transmit outside the aircraft.

The C-6533 also has hands free interphone operation using the HOT MIKE

switch (S2) located in the lower right-hand corner. Hand-free operation is performed by

placing the SELECTOR switch in the ICS position and the HOT MIKE switch is moved up to

the ON position.

NOTE:

The only time the HOT MIKE is used is when the crew members are busy and

need both hands to perform other flight operations. If the SELECTOR switch

is moved from ICS to any other position during HOT MIKE operation, you will

be constantly transmitting.