Service manual

1.4.9 PGI (Photo and Graphics Improvement )
PGI enhances the print quality of halftones and tone gradations, generally used in photographic
and graphic images. Compared with conventional systems, which use one white or black dot as the
minimum unit, PGI technology divides a single dot into 3 parts for a more precise image.
Therefore, the amount of data required for this technology is twice as large as the previous method.
1.4.10 Toner Saver Mode
Toner saver mode can cut toner consumption to half normal use. The printer saves toner by
substituting a gray shade, formed with reduced dots, for the black inside characters. The upper and
right edges are reinforced with full black lines. Use of this mode, however, is limited to output that
does not require good print quality.
Table 1-25. Toner Saver Mode
Toner Saver Mode Edge Reinforcement Halftone/ Full Black
Off
All edges Full black
On
Upper and right edge*
1
Halftone made of 2 dots out of 4 X 4 dots.
*1: Toward the orientation in which image is laid, regardless of the direction paper is fed.
1.4.11 Precaution for Power Off
This printer has an EEPROM installed on the main controller to store user default settings . If the
printer is turned off while the printer is writing new data to the EEPROM, that new data will be
lost, and this may cause an error the next time the printer is powered on. To avoid this, do not turn
off the printer until the message Ready is indicated on the LCD.
Normal Mode
Toner save mode
Reinforced
Halftone
Figure 1-9. Toner Save Mode
Product Description EPL-N2000 Service Manual
1-52 Rev. A