Oki ES9160, Maintenance Manual

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© 2012 OKI DATA CORPORATION All rights reserved ES9160 MFP / ES9170 MFP
ERROR CODE AND TROUBLESHOOTING
8 - 275
8.4.14 White spots
Fig.8-16
Defective area Step Check items Prescription
Developer unit,
Toner cartridge 1 Is the toner density in the developer
material appropriate? Check and correct the auto-toner
sensor and toner supply operation.
Check if the amount of the toner is
sufficient in the toner cartridge.
2 Is the doctor-sleeve gap proper? Adjust the doctor-sleeve gap.
Developer material, Toner,
Drum 3 Using the specified developer
material, toner and drum? Use the specified developer material,
toner and drum.
4 Have the developer material and
drum reached their PM life? Replace the developer material and
drum.
5 Is the storage environment of the
toner cartridge 35°c or less without
dew? Use the toner cartridge stored in the
environment with specification.
6 Is there any dent on the drum
surface? Replace the drum.
7 Is there any film forming on the
drum? Clean or replace the drum.
Main charger 8 Is there any foreign matter on the
charger? Remove it.
9 Is the needle electrode dirty or
deformed? Clean or replace the needle
electrode.
High-voltage transformer
(Main charger / Developer
bias / Transfer roller unit) 10 Is the high-voltage transformer
output defective? Adjust the output, or replace the
transformer.
Transfer roller unit 11 Is there any foreign matter such as
fiber in the paper transport area of
the transfer roller unit? Clean the transfer roller unit.
12 Is there any foreign matter on the
transfer roller? Is there any
abnormality on its appearance? Remove the foreign matter or replace
the transfer roller.
Feeding direction