Installation manual

UPS Aviation Technologies
SL10 Series Audio Selector Panel and Intercom System
Installation Manual
2-7
2.9 Post Installation Checkout
After wiring is complete, verify power is ONLY on pin 20 of the bottom connector, and airframe ground on
bottom connector pin Z. Failure to do so will cause serious internal damage and void UPS Aviation
Technologies's warranty.
2.9.1 Operational Checkout, SL10
1. Apply power to the aircraft and avionics.
2. Plug headsets into the pilot, copilot and passenger positions.
3. With avionics on, and the audio panel off, verify that the pilot can transmit and receive on COM 1,
through the headset, indicating proper “fail-safe” operation. On stereo units, the audio is present in the
right ear only.
4. Rotate the Mic Selector Switch to the Com 1 position.
5. Verify that the C1 light comes on. Verify that the power LED (Light Emitting Diode) in the intercom
section illuminates green. If the LED is red, stop testing and troubleshoot the microphone PTT
installation.
6. Verify proper transmit and receive operation on the copilot position, noting that the copilot PTT switch
allows proper transmission on the selected transceiver.
7. Verify that pushing the C2 button causes the button to illuminate, and the Com 2 receiver to be heard.
Verify operation on Com 1 from the pilot position.
8. Repeat for Com 2 and TEL, (if installed).
9. Rotate the mic selector switch to the C
OM 1/2 position. Verify that the pilot communicates on Com 1
and the copilot on Com 2.
10. Rotate the mic selector switch to the C
OM 2/1 position. Verify that the pilot communicates on Com 2
and the copilot on Com 1.
11. Rotate the mic selector switch to the
TEL/COM 1 position. Verify that the pilot communicates on the
transceiver in the T
EL position and the copilot on Com 1.
12. Verify proper operation of all receiver sources by selecting them using the keypad. Note that the button
for the receiver sources stays in, and the button illuminates to show which source is in use.
13. Push in the S (SPR) button. Verify that all selected audio is heard in the cockpit speaker. Verify that
the audio mutes when the mic is keyed.
14. Verify that the LED in the intercom is illuminated when a microphone is keyed. NOTE: LED does not
change color in "Split Mode".
15. Verify proper Intercom system operation in the A
LL, ISO And CREW modes.
16. Verify that the audio selector panel system does not adversely affect any other aircraft system by
systematically switching the unit on and off, while monitoring the other avionics and electrical
equipment on the aircraft.
2.9.1.1 Marker Checkout, SL10M, SL10MS Only
1. Connect a ramp generator at the antenna end of the marker coax. With the unit under test in HI
sensitivity, verify that a 150 mVolts, modulated 95% with 1300 Hz signal will illuminate the amber
(M) marker light, and that marker audio is present in the headphones when the Marker Audio (M)
push-button has been depressed. Select "S" for speaker to verify marker audio availability on the cabin
speaker. Verify that the white (A) and blue (O) lights will illuminate within ± 3dB of the amber lamp,
with 3000 HZ and 400 Hz applied, respectively.
2. Repeat with the unit in LOW sensitivity, with 1400 mVolts applied.
3. Connect the marker antenna and verify proper operation.
2.10 Final Inspection.
Verify that the wiring is bundled away from all controls and no part of the installation interferes with
aircraft control operation. Move all controls through their full range while examining the installation to see
that no mechanical interference exists. Verify that the cables are secured to the aircraft structure in
accordance with good practices, with adequate strain relief. Ensure that there are no kinks or sharp bends in
the cables and coaxial cables. Verify that the cables are not exposed to any sharp edges or rough surfaces,
and that all contact points are protected from abrasion. Complete log book entry, FAA Form 337, weight