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e-STUDIO281c/351c/451c
(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
value range
Default
Text/Photo 05-532 Current value + 10 or more 40
Photo 05-533 Current value + 10 or more 16
Text 05-534 Current value + 10 or more
0 to 255
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
mode
[05] code Subcode Value recommended
Acceptable
value range
Default
Text/Photo 05-590 0/1
Text 05-591 0/1
Photo 05-592 0/1
Set a value smaller 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.
* 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.
2. Copier-specific Adjustments
2.7