The users guide was excellent. It provided the information neeeded to connect and control the Crate system. Nothing was left to chance
Text excerpt from page 33 (click to view)
Cleaning the LED Array
Clean the LED array � Whenever you install a new toner cartridge � If you see faded vertical areas or light printing down a page Wipe the LED array gently with the cleaning pad that came with your toner cartridge. You can also use a clean, soft cloth with a small amount of rubbing alcohol on it.