- Unplug the machine power cord before starting the following procedure.
 - Remove the ARDF front cover [A] ( 
x1).
 - Remove the Scanning guide plate [B] (
[A]x1).
 - Remove the plastic guides [A] on the sides of the scanning guide plate(
x1).
 - Attach the guides for contact scanning. Each guide has a hole [A].
 - Mount the scanning guide plate, taking care not to damage the sheet [A].
 - Peel off the gap sheet [A] from the DF exposure glass with your hands.
 - Clean the DF exposure glass [A] with alcohol.
To avoid paper jams, make sure adhesive is completely removed. - Turn the main switch on.
 - Start the SP mode.
 - Select SP4-688-001 (DF Density Adjustment ARDF) and change the setting from "104" to "103" for the contact scanning.
 - Change the DF magnification (SP4-871-003) from [0.11%] to [0.00%].
 
- When returning the setting back to non-contact scanning, return the SP values also.