Oki C911 - Stain on White Print. (Refer to Figure 4-2 B)

45530603TH Rev.2
4-82
Oki Data CONFIDENTIAL
4. TROUBLESHOOTING PROCEDURE
4.5.3.(2) Stain on white print. (Refer to Figure 4-2 B)
(2-1) Stain on white print (Partial stain)
Check item Check work
Actions to be taken
at NG
(2-1-1) ID unit
Exposure of drum
to light
Is the drum left in a circumstance in which
drum surface is exposed to direct light for a
long time?
Replace the ID
unit.
To use a new ID
unit for a try, be
sure to use New
Parts Keep Mode
of the System
Maintenance
menu.
Leakage of toner Does toner leak out from either ID unit or from
toner cartridge?
Replace the ID
unit or toner
cartridge.
To use a new ID
unit for a try, be
sure to use New
Parts Keep Mode
of the System
Maintenance
menu.
(2-1-2) Fuser unit
Offset toner of the
fuser unit
Check if the offset toner of the previous
printing is left adhered on the fuser unit or not,
by visual inspection.
Repeat blind
printing using
unwanted media
until offset toner
is created on
print media.
Alternately
replace the fuser
unit.
To use a
new fuser unit
for a try, be sure
to use New Parts
Keep Mode
of the System
Maintenance
menu.
Check item Check work
Actions to be taken
at NG
(2-1-3) Intermediate transfer roller
Stain of
intermediate
transfer roller
Check the stain of the paper and intermediate
transfer roller is conformity.
Practice the
Transfer
cleaning of
Maintenance
Menu
(2-2) Stain on white print (overall stain)
Check item Check work
Actions to be taken
at NG
(2-2-1) Print media
Type of print media C heck to see that the print media which is
used for printing is not a specially thin media.
U se the normal
paper.
(2-2-2) High voltage terminal
ID unit terminal Check that the high voltage terminal of the ID
unit is contacting with the Contact Assembly
normally by visual inspection. (Refer to Figure
4-3.)
Replace the ID
unit or correct
the high voltage
terminal.
To use a new
ID unit for a
try, be sure to
use New Parts
Keep Mode
of the System
Maintenance
menu.
(2-3) Stain on white print (Paper top and bottom stain)
Check item Check work
Actions to be taken
at NG
(2-3-1) Intermediate transfer roller unit and Paper feeding route
Stain of
intermediate
transfer roller or
paper feeding route
Check the stain of intermediate transfer roller
or paper feeding route.
Wipe the
intermediate
transfer roller or
paper feeding
route