6-8❚ Copies are marked.The platen glass or the platen glass cover may be dirty.• Clean the platen glass or the platen glass cover. (→ p. 5-1)The rollers inside the machine are dirty.• Clean the rollers. (→ p. 5-2)There may be a scratch on the cartridge.• Replace the cartridge with a new one.Condensation has built up inside the machine.• Allow at least two hours for the machine to adjust to room temperature before attempting to use it.The machine may be installed in a location where the floor or foundation is unstable.• Install the machine in a proper location. (→ p. 1-1)❚ Black lines on the copyThe read area of the platen glass is dirty.• Clean the read area of the platen glass. (→ p. 5-2)❚ Copies are too dark or too light.The copy exposure may not be adjusted correctly.• Adjust the copy exposure correctly in the PRINT EXPOSURE of COMMON SETTINGS of the AdditionalFunctions. (→ p. 7-2)TONER SAVER MODE may be set to ON in COMMON SETTINGS of the Additional Functions.• Set TONER SAVER MODE to OFF. (→ p. 7-2)❚ The copy images are partly missing or shaded when you make copies on thick paper.• Set HIGH COPY MODE to ON. (→ p. 7-2)❚ The copy images are missing when you make copies on envelopes.MP PAPERTYPE of COMMON SETTINGS of the Additional Functions may not be set correctly.• Select SPECIAL PAPER 2 in MP PAPERTYPE. (→ p. 7-2)❚ The copy images are missing when you make copies using the 2 on 1 function.The documents may not be the letter size.• Be sure to use two sheets of letter size documents when you make copies using the 2 on 1 function.❚ The copy images are missing when you make copies.330 mm may be selected in MAX. SCAN LENGTH of COPY SETTINGS of the Additional Functions.• Select 356 mm in MAX. SCAN LENGTH. (→ p. 7-3)❚ The edges of copies are dirty when you make copies using the multi-purpose tray.MP TRAY PAPERSIZE of COMMON SETTINGS of the Additional Functions may not be set correctly.• Set MP TRAY PAPERSIZE to ON and specify the size. (→ p. 7-2)❚ The copies are dirty only when you use thin paper or tracing paper.Other mode except for TRACING PAPER in MP PAPERTYPE of COMMON SETTINGS of the AdditionalFunctions may be selected.• Select TRACING PAPER. (→ p. 7-2)