Troubleshooting
APPENDIX A - TROUBLESHOOTING
This appendix provides information to assist troubleshooting if problems occur after completing the installation. Use Table 3 to assist in troubleshooting.
| Table 3 Troubleshooting Guide | |
|
|
|
Problem | Cause | Solution |
The SL40 does not power on. | The unit is not getting power. | Check power connections, breakers, |
|
| and main avionics switch. |
The unit does not transmit. | The TxKey input is not being pulled | Check the TxKey (mic key) input, |
| low. | pulled low for transmit. |
| A weather channel is selected. | Select a different frequency, the unit |
|
| will not transmit on a weather |
|
| channel. |
| The input voltage is too low. | Increase input supply voltage to > 9 |
|
| volts DC. |
Mic Sensitivity varies | Mic Levels need adjustment | See the Mic Level Adjustment on |
|
| page 13 |
The sidetone and intercom | Wrong type of headsets, or level | See the Sidetone Level Adjustment on |
levels are too low or high. | needs adjustment. | page 12. |
The intercom doesn’t function. | Control input not connected. | The intercom select input must be |
|
| pulled to ground to turn on the |
|
| intercom function. |
| No voice activation, or have to talk | Change the intercom squelch |
| too loud. | threshold using the setup function |
|
| described in the user’s manual. |
If the Apollo SL40 unit fails to operate despite troubleshooting efforts, contact the Garmin AT factory for assistance.
Garmin AT, Inc.
2345 Turner Rd. SE
Salem, Oregon 97302
USA
Phone (503)
http://www.garminat.com
Be prepared to offer the following information about the installation: x Installation configuration (accessories, antenna, ...)
x Model number, part number with mod levels, and serial number x Software version
x Description of problem
x Efforts made to isolate the problem
Apollo SL40 Installation Manual | 21 |