Nautel NX15, Troubleshooting Manual

Page: 17 / 274

NX25/NX15 Troubleshooting Manual Responding to alarms
Issue 5.0 2016-05-06 Page 1-9
Controller: EEPROM
Failure: Potentiometers This alarm occurs when the transmitter is unable to read its RF
Symmetry Adjustment calibration from EEPROM upon boot-up.
The alarm will remain asserted until the RF Symmetry has been
re-calibrated. When this alarm occurs, the transmitter will load a
default level of exactly mid-scale for the symmetry adjustment
potentiometers. Set the RF Symmetry Adjust per the factory
configuration. Cycle (turn off, then on) ac power to the transmitter.
If the alarm persists, replace the battery on the control/interface
PWB and retry the above steps. If the alarm persists, replace the
control/interface PWB (see
“Control/interface PWB replacement”
on page 1-60 ).
Controller: EEPROM
Failure: Remotes This alarm occurs when the transmitter is unable to read its
remote I/O configuration from EEPROM upon boot-up. The
transmitter will revert to the initial default remote I/O settings and
the alarm will remain asserted until a new remote input/output is
configured. Reconfigure the remote I/O settings as desired. Cycle
(turn off, then on) ac power to the transmitter. If the alarm persists,
replace the battery on the control/interface PWB and re-try the
above steps. If the alarm persists, replace the control/interface
PWB
(see “Control/interface PWB replacement” on page 1-60 ).
Controller: EEPROM
Failure: Schedule This alarm occurs when the transmitter is unable to read its
schedule configuration from EEPROM upon boot-up. The
transmitter will establish a new, completely blank schedule. The
alarm will remain asserted until at least one new scheduled event
is created. Recreate the desired schedule settings. Cycle (turn off,
then on) ac power to the transmitter. If the alarm persists, replace
the battery on the control/interface PWB and retry the above
steps. If it still persists, replace the control/interface PWB (see
“Control/interface PWB replacement” on page 1-60 ).
Alarm (with Prefix) Description and Troubleshooting Action