Canon GP215, Service Handbook, Page: 29 / 217

2. Priority on Image Quality Mode
a. AE_SLOP
For priority on image quality mode, an AE table is selected based on a study of the original density his-
togram prepared during a pre-scan.
The slice level distinguishing the data into text (black) and background (white) can be adjusted under
‘AE_SLOP’ in service mode (ADJUT; *3*).
AE_SLOP: A higher setting makes the images darker; between 1 and 19. (left of Figure 2-241)
b. AE_LIGHT/AE_DARK
The AE table selected as a result of a pre-scan may be corrected to suit the preference of the user.
AE_LIGHT: A higher setting emphasizes the background of the original; a lower setting, on the other
hand, de-emphasize the background of the original; between 0 and 40 with the default at 20. (upper right
of Figure 7-00)
AE_DARK: A higher setting will increase black; a lower setting, on the other hand, will decrease black;
between 0 and 40 with the default at 20. (Figure 2-241)
Figure 2-241
Original
density histogram
Dark
(black) Light
(white)
Signal level
Degree
Text
Background
AE table
Input
Output
Light
(white)
Dark
(black)
Black
White
Input
Output
Light
(white)
Dark
(black)
Black
White
Input
Output
Light
(white)
Dark
(black)
Black
White
Slide level dividing white area (background) and black area
(text; may be changed under 'AE_ SLOP' of 'ADJUST' in service mode (*3*)).
Higher
setting
Higher setting
Lower setting
Lower
setting
May be adjusted
under 'AE_LIGHT'
of 'ADJUST' in
service mode (*3*).
May be adjusted
under 'AE_DARK'
of 'ADJUST' in
service mode (*3*).
Lower
setting Higher
setting
2–21
STANDARDS AND ADJUSTMENTS