Various known issues with operation of the Mask Aligner or replacement parts. Most of these issues are fixed currently, but are still listed in case the problems reoccur. If repairing or replacing parts, consult the corresponding issue page to be informed of potential problems!
Major Issues
If Major Issues appear, as they have in the past, they need to be fixed ASAP:
Minor Issues
Minor Issues only need to be fixed, if measurement shows odd behaviour:
Potential issues
Potential issues were noticed, but had no measurable or negligible effect on operation of the device, but could potentially have issues in future and should be investigated, when problems arise: