To maintain stable, high quality image results, the IDC sensors monitor control patches and feedback on colour density and halftones. By receiving feedback on colour density and halftone dots, the system can automatically make adjustments for more stable output.

The optional RU-509 Relay Unit's density sensor reads the colour patches printed on the paper and relays the gamma adjustment (gradation correction) values to the print engine, thereby correcting any variation factors during fusing, providing density corrections that match the paper characteristics.

Air is delivered to prevent paper from wrapping around the upper fusing belt, thereby improving the reliability of the fusing unit's paper feeding.

The cyclone-type air suction system features a high-powered dust collector which collects 3 times more toner compared to the previous model. This also reduces the number of replacement frequencies of the filter unit for reduced machine downtime.

Two different types of curl correction are available to prevent paper waving or warping. The optional RU-509 Relay Unit employs a mechanical decurler suitable for both coated and uncoated papers. Decurl strength is adjustable over five steps and in both directions.
The optional ICE (Inter-cooler Curl Eliminator) humidifies the paper passage to remove unwanted static electricity and heat from the paper. This reduces the curling and clinging of the paper to realise highly accurate paper delivery when combined with the mechanical decurler.

Ultrasonic sensors can detect multi-feeding of papers as they receive fewer ultrasonic waves compared to single sheets of paper. If multi-feeding is detected, printing will automatically stop to reduce printing errors caused by blank sheets being mixed in with the output.