Toshiba e-Studio477s, Service Manual, Page: 97 / 482

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SETTING / ADJUSTMENT
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4.4.4 Background adjustment (Black/Grayscale)
The density of background can be adjusted as follows.
<Adjustment Mode (05)>
<Procedure>
The procedure is the same as that of
 P. 4-15 "4.4.2 Density adjustment".
4.4.5 Judgment threshold for ACS (common for copy and network
scan)
The judgment level is adjusted for the automatic identification of whether the original set on the glass is
black or color. Namely, this is to adjust the judgment level used when “Auto Color” is selected at color
modes. The same adjustment value is simultaneously applied to all cases of originals on the original
glass for copier functions and network scanning functions, and those placed on the RADF.
<Adjustment Mode (05)>
<Procedure>:
The procedure is the same as that of
 P. 4-15 "4.4.2 Density adjustment".
Code Color mode Original mode Remarks
7436 Black Text/Photo The smaller the value is, the background
becomes lighter.
Acceptable values: 0 to 255 (Default: 128)
7437
Text
7438 Photo
7441 Custom mode
7439
Grayscale
-
Code Item to be adjusted Contents
7630 Judgment threshold
for ACS The larger the value is, the more an original tends to be judged as
black even at the Auto Color Mode. The smaller the value is, the
more it tends to be judged as color.
Acceptable values: 0 to 255 (Default: 70)