Kyocera FS-1020D Service Manual page 44

2FM
Code Error indications
7990
1-5-10
Check procedures/corrective measures
START
Shake the process unit
horizontally.
Turn power switch off,
then on.
"7990" error
shown?
No
End.
Waste toner full [Total page count more than 100,000 pages
of printing]
Yes
Replace the process
unit.
Turn power switch off,
then on.
"7990" error
shown?
Replace the waste toner
sensor or engine board (KP-
1046). See page 1-6-9.
Contents
No
End.
Yes