Xerox AltaLink B8145 Series User Manual page 240

Maintenance
3. Remove the printhead LED lens-cleaning rod from inside the front door.
4. Slowly push the cleaning rod into the printhead LED lens cleaning slot until it stops, then pull out the rod.
Repeat this action two more times.
5. Return the cleaning rod to its original location.
6. To insert the waste toner transport unit:
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Xerox ® AltaLink ® B8145/B8155/B8170 Series Multifunction Printer User Guide