Appareo STRATUS ESG Manuale - Pagina 6
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8. Replace RG58 (black coax) with RG142 or RG400, especially if you are
getting an intermittent "Transmitter Fail" error.
Can I troubleshoot a "Transmitter Fail" error on the bench?
Connect Stratus ES/ESG directly to the proper input on a ramp tester or bench
test set with a proper load to determine if it is a transponder problem or an
aircraft coax or antenna problem.
If you don't have a proper bench set up, use a 5-8 feet piece of coax with a
pulse antenna attached to a ground plane.
Q: Why does the transponder's display start flashing after
going from SBY to ON or ALT mode?
If a King KT-76A, Collins TDR-950, or Narco AT-50A or AT-150 was installed
before Stratus ES or Stratus ESG in a 28 volt airplane, ensure that you
removed the dropping resistor that was installed with these models. Stratus ES
or Stratus ESG should be connected directly to the power bus.
Q: I cannot see the transponder display. What should I check?
Connect the transponder on the bench and ensure that the unit has a
current draw.
The display may be on, but very dim. Cup your hands over the display to
see if display is on. If the transponder was configured to adjust
brightness using the external dimming bus and there isn't any voltage on
the dimming bus inputs, then the transponder's display is illuminating; it's
just not very bright. Either apply dimming voltage or re-configure the
transponder to use the built-in ambient light sensor.
Put voltage on the dimmer input.
Press the PWR button twice. If the unit boots up, ensure that you're on
the newest firmware version as shown on the
service bulletin
page.