FlightCom IIsx Manual
FlightCom IIsx Manual
FlightCom IIsx Manual
INSTALLATION/OPERATION MANUAL
NOTE: be sure to secure intercom cables out of the way of the seat rails.
Model IIsx
Installation Diagram SR-4
Lighter Plug 12-32 VDC White
(optional)
Cigar Lighter Band
12-32 VDC
Headphone Plug Flightcom IIsx OUT
Headphone Jack
.250 Mic Plug
Microphone Jack
.206 .206
PILOT
Push-to-talk Switch IN
Microphone Jack Aircraft Power Indicator
.206 .206 CO- "ON" = Aircraft Power
Mic Plug PILOT "FLASH" = Battery Power Mic
CO-PILOT "OFF" = Low Battery *
Push-to-talk Switch Earphone
Detachable
Cords
Tape Recorder
Lighter Plug (optional)
Y-ADAPTER
Headphone Plug
.250 * When operating on battery power.
Single .206 .206 Mic Plug
Microphone PILOT
Jack Push-to-talk Switch
.206
NOTE: disconnect the Cigarette Lighter Adapter cord from the aircraft cigarette lighter when it
is not in use.
To connect the intercom to a 9-volt battery when aircraft power is not available:
1. Slide the battery backplate in the direction of the white arrow and remove it.
2. Attach the battery to the connector wires, and carefully insert it into the retention cavity
without pinching the wires, so that the battery is held firmly in the cavity.
3. Replace the backplate and snap it into its locked position.
To connect the intercom to the aircraft headphone and microphone jacks using a portable PTT
switch when the aircraft does not have a built-in PTT switch:
1. Insert the .250 inch intercom headphone plug into the aircraft headphone jack.
2. Insert the .206 inch intercom microphone plug into the portable PTT switch
(Flightcom PTT GOLD, or equivalent).
3. Insert the portable PTT switch .206 inch microphone plug into the aircraft microphone
jack (see Installation Diagram).
To connect the intercom to the aircraft microphone jacks to allow for co-pilot transmit capability:
1. Insert the Co-Pilot Transmit Cable (included with the IIsx intercom) into the intercom
CO-PILOT XMIT jack (see Installation Diagram).
2. Insert the .206 inch microphone plug of the co-pilot transmit cable into the microphone
jack in the aircraft.
a. If the aircraft does not have a built-in PTT switch for the co-pilot's side of the aircraft,
connect the .206 inch microphone plug of the co-pilot transmit cable to a portable
PTT switch, and then connect the portable PTT switch plug to the aircraft co-pilot
microphone jack (see Installation Diagram).
1
Connecting the Pilot and Co-Pilot to the Aircraft When There is Only One Aircraft
Microphone Jack
Use a Y-adapter when the aircraft has only one microphone jack and both pilot and co-pilot
need transmit capability (see Installation Diagram).
To connect the pilot to the aircraft with a Y-adapter when the pilot is using a portable
PTT switch:
1. Insert the .250 inch intercom headphone plug into the aircraft headphone jack.
2. Insert the .206 inch intercom microphone plug into the pilot portable PTT switch.
3. Insert the PTT plug into one of the Y-adapter microphone jacks.
To connect the co-pilot to the aircraft with a Y-adapter when the co-pilot is using a portable
PTT switch:
1. Insert the microphone plug of the co-pilot transmit cable into the co-pilot portable
PTT switch.
2. Insert the PTT microphone plug into the other Y-adapter microphone jack.
3. Insert the Y-adapter microphone plug into the aircraft microphone jack.
NOTE: if you are connecting the pilot and co-pilot to the aircraft with a Y-adapter and not
using a push-to-talk switch between the intercom and the Y-adapter, audio from both the pilot
and co-pilot can transmit.
NOTE: if you are using a stereo headset, be sure to set it to “Mono” (refer to your headset
operation manual for further instructions).
NOTE: common 8-ohm consumer headphones can be used with the aircraft's hand micro-
phone as an economical alternative to buying additional aviation headsets, and will not harm
the intercom or affect the volume of other headsets.
NOTE: noise cancelling microphones will not operate correctly if they are more than 1/8" from
the mouth.
5. While speaking loudly, adjust the intercom Volume control knob to a comfortable listening
level.
6. When no one is talking, turn the Squelch control knob as far clockwise as possible while
still blocking background noise (adjust this setting in flight to compensate for different
background noise levels).
NOTE: if you set the squelch control too high, your voice will be cut out unless you talk very
loudly; if you set the squelch control too low, you may occasionally hear background noise.
3
Auxiliary Audio Input
To listen to music or other audio programming:
1. Connect one end of a cable with a 3.5 mm connector to the intercom AUX: IN jack.
2. Connect the other end of the cable to the earphone jack of a tape player or other audio
device.
3. Adjust the volume of the tape player lower than the volume of the aircraft radio. Radio,
intercom, and music signals will be mixed.
Troubleshooting
Problem: The intercom does not work when plugged in.
Reason: the push-to-talk (PTT) switch may have been incorrectly inserted between the headset and the
intercom.
Remedy: reconnect the PTT switch between the intercom and the aircraft radio.
Reason: the cigarette lighter power source may not be working.
Remedy: verify that the cigarette lighter power source is working by checking to see if the green LED light
on the front panel of the intercom is on when the intercom is turned on and plugged into the
cigarette lighter. If the LED light is not on, the Cigarette Lighter Adapter fuse may need to be
replaced. Replace the fuse, using only a 1/4-Amp fuse to protect the intercom from reverse
polarity damage. If the fuse continually faults, have your aircraft's power supply checked.
Reason: the aircraft's cigarette lighter jack may be too corroded or contaminated with ash deposits to
make a good electrical contact for low current devices like the intercom.
Remedy: replace the corroded or contaminated aircraft cigarette lighter jack.
NOTE: high current devices like spotlights or cigarette lighter elements, when inserted, create an arc that
burns away oxidation, allowing these devices to work in an otherwise faulty jack. If this is the case,
use a different method to obtain power or use the intercom's internal battery.
NOTE: many aircraft do not have an operable cigarette lighter due to an Airworthiness Directive (AD)
requiring disconnection. If this is the case, use a different method to obtain power or use the
intercom's internal battery.
NOTE: if you decide to hardwire the intercom to the aircraft power source, be sure to use a 1/4-Amp fuse
in the power line to protect the intercom from reverse polarity damage.
Reason: the plugs may not be completely connected to the intercom.
Remedy: reconnect the plugs securely.
Reason: the volume may not be turned up.
Remedy: turn up the volume.
Reason: the headphone plugs may be corroded.
Remedy: clean the headphone plugs with steel wool.
Reason: the battery may be worn down.
Remedy: replace the battery.
Problem: A high pitch whine is present only when the engine is running, and varies with RPM.
Reason: the noise is coming from the alternator or generator on the power bus of the aircraft.
Remedy: try connecting the ground lead to another point in the aircraft. If the noise is especially loud, it
may be due to a weak battery or an alternator with defective diode(s). In extreme situations, a
commercial alternator noise filter connected in series with the intercom power lead should help.
4
Problem: As the pilot, you are having difficulty transmitting on the radio.
Reason: your headset microphone plug may not be connected to the pilot side of the intercom and/or
the co-pilot intercom microphone plug may be connected to your PTT switch.
Remedy: correctly reconnect plugs (see Installation Diagram).
Problem: The unit isn't loud enough or you lose parts of your sentences while speaking.
Reason: the microphone may not be close enough to you.
Remedy: place the microphone as close to your lips as possible.
Reason: the squelch may be adjusted too high.
Remedy: while no one is talking, slowly rotate the squelch control knob clockwise until the background
noise just disappears. Do not turn the knob any further than is necessary. You may find that one
brand of aviation headset puts out a higher signal than another. If this is the case, you may be
able to equalize the sensitivity of your headset by adjusting the microphone preamps (refer to
your headset's operation manual for further instructions).
NOTE: if your intercom still does not work properly, do not return it without contacting us first. Call or
write us with a detailed description of the problem, and we should be able to explain how to correct it.
5
Two-Year Intercom Limited Warranty to Original Purchaser
Flightcom Corporation warrants to the original purchaser of this product that it will be
free from defects in materials and workmanship, under normal and proper use, for the
period of two years from date of purchase. Flightcom Corporation will repair or
replace, at its sole option, any parts showing factory defects during this warranty period,
subject to the following provisions. This warranty applies only to a new product
which has been sold through authorized channels of distribution. All work under
warranty must be performed by Flightcom Corporation. All returned products must be
shipped to our address, freight prepaid, accompanied by a dated proof of purchase.
SAVE YOUR SALES SLIP! The purchaser voids this warranty if he, she or others attempt
to repair, service or alter the product in any way. This warranty does not apply in
the event of accident, abuse, improper installation, unauthorized repair, tampering,
modification, fire, flood, collision or other damage from external sources, including
damage which is caused by user replaceable parts (leaking batteries, etc.). This warranty
does not extend to any other equipment or aircraft to which this product may be
attached or connected. The foregoing is your sole remedy for failure in service or
defect. Flightcom Corporation shall not be liable under this or any implied warranty
for incidental or consequential damages, nor for any installation or removal costs or
other service fees. This warranty is in lieu of all other warranties, express or implied,
including the warranty of merchantability or fitness for use, which are hereby excluded.
To the extent that this exclusion is not legally enforceable, the duration of such implied
warranties shall be limited to two years from date of purchase. No suit for breach of
express or implied warranty may be brought after two years from date of purchase.
Flightcom Corporation
7340 SW Durham Road, Portland, OR 97224 USA
www.flightcom.net • Phone: 503-684-8229 • Fax: 503-620-2943
600-0034-00 Rev D.