| 摘要 |
<p>A printer is disclosed. The printer includes a scanner in the paper path between the print engine and the output tray. The scanner scans test areas on recently printed pages. The printer compares the image quality in the test area with the image quality from a reference area. When the image quality in the test area has degraded below a threshold amount compared to the image quality of the reference area, a toner low warning is displayed.</p> |
