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

2. Copier-specific Adjustments

(b)Enter adjustment mode [05]. Increase the values for codes [532 to 534] to adjust the background peak of range correction and lighten the copy image.

(Increase the number of pixels to be identified as "white" by range correction.)

•The code to use varies, according to original mode (Text/Photo, Photo or Text). Adjust the value for the [05] code corresponding to the condition for which you would like to improve the image quality and increase the current value by 10 to 30.

Original mode		[05] code	Value recommended	Acceptable		Default
				value range
Text/Photo	05-532		Current value + 10 or more	0 to 255	40
Photo	05-533		Current value + 10 or more		16
Text	05-534		Current value + 10 or more		40

After adjusting the background peak, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

(5) Enter adjustment mode [05]. Change the values for codes [590 to 592] to adjust the gamma curve balance of the low- and medium-density areas.

Original		[05] code	Subcode	Value recommended	Acceptable	Default
mode					value range
Text/Photo	05-590		0/1	Set a value smaller than 128.	0 to 255	128
Text	05-591		0/1
Photo	05-592		0/1

*Set the value in increments of approximately 20, while checking the copy image until the optimum value is obtained.

*Since the subcode varies, according to the area for which the density is adjusted, refer to the table below and set the appropriate subcode. Remember that mainly adjusting the low- or medium-density area will change the copy density of the images seen through the back of the page. Setting "2" for the subcode will allow you to adjust the high-density area. But this will not solve the problem. Therefore, never change the

values for the high-density area.

Subcode	Area for the density to be adjusted
0	Low-density area
1	Medium-density area

‰Cautions after the completion of the adjustment

The adjustment may possibly cause text handwritten with a pencil or light text to become illegible on the copy. Therefore, carefully perform the adjustment, while checking the copy image.

‰Remarks

Enter the value within the recommended value range mentioned in the procedures. Otherwise, it may cause a loss in copier performance, including degradation in the image quality and reduction in the life of the consumables.

e-STUDIO281c/351c/451c 2.7