Bluetooth Problems
8-5
P/N: 1023998-01
Troubleshooting
Bluetooth Problems
The following are some of the most commonly encountered error messages and other problems.
TRU error message: Can’t find receiver
• The receiver is turned off.
– Ensure the receiver has power and is turned on.
• Bluetooth is not turned on; the BT LED is off.
– Reset the receiver to the factory default settings by pressing the Power button for 10 to 15
seconds.
– You can also turn on power to Bluetooth using TRU. To do this, on the TRU main window,
choose Receiver Settings > Bluetooth.
• There is interference.
– Move the receiver, controller, or computer to an unobstructed location.
• The receiver is too far away.
– Move the devices closer together.
• The receiver is already connected via Bluetooth to another device.
– Disconnect the receiver from the other controller or computer.
• The receiver port used for connection is not in Command mode.
a. Connect the receiver to a computer and open TRU (see “Connection” in the
Topcon
Receiver Utility (TRU) Help
embedded in the software).
b. Click Configuration > Receiver > Ports.
c. Change the Input Mode for the Bluetooth serial port used for connection to cmd.
TRU error message: Open COM# port failed: Access is denied.
• Another application uses the computer port dedicated for connection.
– Close the application, and then re-connect.
– Connect the receiver via another, unused computer port.
After searching for available devices, none are discovered
• The receiver is not receiving power.
– Check that the receiver is getting power and is turned on.
– Check that the power cable is correctly attached to the port if one is being used.
This is the most common cause for this error message. Use TRU to double check the
settings for the connection port.
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