Garmin 500W Series, Инструкция по эксплуатации

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500W Series 190-01226-03 Rev. 5
Instructions for Continued Airworthiness Bell 206B Page 11 of 23
2.6 Troubleshooting Information
If error indications are displayed on the 500W series unit, consult the Troubleshooting section contained
below:
Table 2 Troubleshooting Guide
Problem Possible Cause Solution
The 500W Series
unit does not power
on.

The unit is not getting power to
the main connector P5001.

Make sure power is connected to the
main 78-pin connector P5001, pins
19 and 20 and ground to P5001, pins
77 and 78. Check circuit breakers
and main avionics switch.
The 500W Series
unit does not
compute a position.

Not receiving signals.

Check the GPS antenna connections.
Make sure the aircraft is clear of
hangars, buildings, trees, etc.

Wait 20 minutes for unit to complete
cycle.
GPS signal levels
drop when avionics
are turned on.

Noise interference from other
avionics.

Turn all avionics off, then turn on
each piece one at a time to isolate
the source of the interference. Route
GPS cable and locate GPS antenna
away from sources of interference.
The GPS signal
levels are very low.

Improper antenna installation or
coax routing.

Check GPS antenna installation,
connections, and cable routing. The
GPS antenna must be mounted on
the top of the aircraft.

Antenna shaded from satellites.

Make sure the aircraft is clear of
hangars, buildings, trees, etc.

RF interference at 1575.42
MHz from VHF COM.

Move GPS antenna further from the
COM antenna. Add a 1575.42 MHz
notch filter in COM coax. Fix or
replace the COM. Disconnect the
ELT antenna coax to check for
possible re-radiation.
The 500W Series
unit does not
transmit.

The PTT input is not being
pulled low.

Check that the PTT (mic key) input is
pulled low for transmit.

No transmit power to the COM.

Make sure power input is connected
to the COM 25-pin connector P5002
11 and 12 and ground to P5002 21
and 22.

The input voltage is too low.

Increase input supply voltage to
>12VDC. (>24VDC for 530AW
models)
The sidetone level is
too low or too high.

Wrong type of headsets, or
level needs adjustment.

If necessary, adjust the sidetone
level. Sidetone adjustment is found
on the COM Setup page.
OBS Resolver won’t
calibrate.

Incompatible resolver or
improper connection.

Check the resolver specifications and
wiring.