Service manual

System Service Mode
D127/D128 3-26 SM Appendix
4020*
Dust Check
DF dust check function
4020 1 Dust Detect: ON / OFF [0= OFF or 1= ON / 0 ]
4020 2
Dust Detect: Lvl [0 to 8 / 4 / 1 /step]
The larger value is set, the more sensitive the detection becomes.
4020 3
Dust Reject: Lvl [0 to 4 / 0 / 1 /step]
0=OFF
The larger value is set, the stronger the correction becomes.
4400* Scanner Erase Margin [0 to 3 / 0 / 0.1 mm/step]
4400 1 Book Leading Edge
Adjusts the mask range against shade on
each part of the original.
4400 2 Book Trailing Edge
4400 3 Book Left
4400 4 Book Right
4400 5 Trailing Edge
Adjusts the mask range for ADF copying.
4400 7 Left
4400 8 Right