4 Locate the white board. Figure 24. ADF delivery system (3 of 5) 5 Locate the white, vinyl calibration strips. Figure 25. ADF delivery system (4 of 5) 6 Clean the ADF backing and the calibration strips by wiping them with a clean, damp, lint-free cloth. Use an ammonia-based surface cleaner to dampen the cloth. 7 Close the ADF. Figure 26. ADF delivery system (5 of 5) 58 Chapter 4 Product maintenance C8523-90921