Duplo DP-S Series, Service Manual

Page: 164 / 298

163
,
Electrical system
chap.4
(5) Adjusting the Document Reading Darkness
(Make adjustment by the black level and the white level.)
Adjustment procedure
1.
Access HELP - 044.
2.
Select and touch the item to be adjusted and
change the value.
Adjust density of the dark part.
¡
To heighten density of the dark part.
\ Increase the black level.
¡
To lower density of the dark part.
\ Decrease the black level.
Adjust density of the light part.
¡
Scumming occurs.
\ Increase the white level.
¡
Platemaking of the light part is impossible.
\ Decrease the white level.
3.
Press the key to store the set value.
4.
After master making and printing, check density.
HELP - 044
\
see p.249
2. Adjusting the Scan Level : Text/Photo,
Photo/Text, Photo mode
1. Adjusting the Scan Level : Text mode
(Make adjustment by the black level and the peak hold.)
Adjustment procedure
1.
Access HELP - 044.
2.
Select and touch the item to be adjusted and
change the value.
Adjust density of the dark part.
¡
To heighten density of the dark part.
\ Increase the black level.
¡
To lower density of the dark part.
\ Decrease the black level.
Adjust the total lightness.
¡
Scumming occurs. \ Decrease the peak hold.
(Minus side)
¡
Platemaking of the light part is impossible. \
Increase the peak hold. (Plus side)
3.
Press the key to store the set value.
4.
After master making and printing, check density.
HELP - 044
\
see p.250
¡
HELP-044 display
¡
HELP-044 display