Toshiba 451C, 351C, e-STUDIO281c manual Original mode

2. Copier-specific Adjustments

(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		Default
						value range
Text/Photo	05-590		1/2		Set a value larger than 128.	0 to 255	128
Text	05-591		1/2
Photo	05-592		1/2

*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.

2.1 e-STUDIO281c/351c/451c