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e-STUDIO281c/351c/451c
(4) Enter adjustment mode [05]. Increase the value for code [648] to increase the copy density of text.
(To improve faint, smudged text or thin lines)
• Initially, set a value larger than 180 for code 05-648. Copy and check the copy image quality. Next, finely
adjust the value, in accordance with the original density. Up to 255 can be set for this code.
Original mode [05] code Value recommended Acceptable value range Default
Text/Photo 05-648 Approx. 180 0 to 255 30
After increasing the copy density, copy and check the copy image quality.
If further image quality adjustments are still necessary, use the next procedure.
(5) Press the [BASIC] button on the Control Panel. Select "TEXT" from among the original mode options.
* To have "TEXT" selected from among the original mode options by default, refer to procedure (1) in 2.8
To Eliminate Moiré.
After selecting Text mode, copy and check the copy image quality.
If further image quality adjustments are still necessary, use the next procedure.
(6) Enter adjustment mode [05]. Change the values for codes [590 to 592] to adjust the gamma curve balance
of the medium- and high-density areas.
Original mode [05] code Subcode Value recommended
Acceptable
value range
Default
Text/Photo 05-590 1/2
Text 05-591 1/2
Photo 05-592 1/2
Set a value larger than 128. 0 to 255 128
* Set the value in increments of approximately 20, while checking the copy image until the optimum value is
obtained.
(Please be careful that the gradation (or density) of the medium-density area may exceed that of the high-
density area, depending on the set value.)
* The subcode varies, according to the area for which the density is adjusted. Refer to the table below and
set the subcode for the area to be adjusted. The density of light text or a graphic image will vary, if the
medium- or high-density area is mainly adjusted. Setting "0" for the subcode allows you to adjust the low-
density area. But it will not affect the light text or graphic images. Therefore, never change the value for
the low-density area.
Subcode Area for the density to be adjusted
1 Medium-density area
2 High-density area
After adjusting the gamma curve balance, copy and check the copy image quality.
If further image quality adjustments are still necessary, use the next procedure.
2. Copier-specific Adjustments
2.1