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15. Troubleshooting
Possible cause Action
AutoAlignment Head not powered
See concerning topic above
xRACU Classic or xRACU Lite software is installed on the MCU Uninstall xRACU Classic and xRACU Lite software
Bad communication
Check LEDs on the LEX unit (see concerning topic)
Plug in both RJ45 connectors of the SFTP Cat.5e cable
Plug in the USB connector of the LEX unit to the MCU USB port
and perform a power cycle on the AutoAlignment Head
Remove any HUB from the line AutoAlignment Head — MCU
Spectrometer not detected (see the procedure below to check if
the camera is detected)
Unplug and plug in the USB connector of the LEX unit to the
MCU USB port and perform a power cycle on the AutoAlignment
Head
Stop and restart XDS RACU Server on the MCU
Wrong calibration files Upload the correct Spectrometer calibration file (<filename>.cal)
to the MCU
Image 15-13
Spectrometer: USB cable (AutoAlignment Head stan
dard version)
Image 15-14
Spectrometer: USB cable (AutoAlignment Head rugged version)
Wrong measurements
Possible cause Action
Ambient light conditions
Create a fully dark environment
Spectrometer aperture covered Remove the object covering the Spectrometer aperture
Checking if the spectrometer has been detected
1. On the MCU, browse to S tart > Adm inistrative Tools > Devices
2. In the list, check if Ocean Optics Devices > O cean Optics USB4000 is present
Image 15-15
Spectrometer: detected by Windows OS
R59770509 AUTOALIGNMENT HEAD GEN II 26/11/2013 161