Oki MB461 Maintenance Manual page 258

Oki Data CONFIDENTIAL
The white section is dirty
• Is the image drum exposed by the external light?
• Yes Install the image drum in the printer and wait 30 minutes.
• No From [MAINTENANCE MENU], select [PAPER BLACK SET] - [SMR
SETTING] and set a larger value for adjustment.
• Has the trouble been solved?
• Yes Completed.
• No From [MAINTENANCE MENU], select [SMR SETTING] and set a
smaller value for adjustment.
• Has the trouble been solved?
• Yes Completed.
• No Is the heat roller of the fuser unit assy dirty?
• Yes Clean the heat roller.
• Has the trouble been solved?
• Yes Completed.
• No Replace the image drum cartridge.
• Has the trouble been solved?
• Yes Completed.
• No Replace the main board, high-voltage power/ sensor board.
White paper is outputted
• Is the LED head appropriately connected? (Check the HEAD connector of the
main board and the PC connector of the LED head.)
• No Connect the LED head appropriately or replace the head cable.
• Yes Is the image drum cartridge appropriately connected to the earth
contact? (See Figure 7-2
• No Adjust the earth contact (drum) of the contact assembly.
• Yes Replace the LED head.
• Has the trouble been solved?
• Yes Completed.
• No Replace the main board or high-voltage power supply unit.
44871001TH Rev.6
)
Vertical black belt/ Black line
• Clean the LED lens array of the LED head.
• Has the trouble been solved?
• Yes Completed.
• No Replace the LED head.
• Has the trouble been solved?
• Yes Completed.
• No Replace the image drum cartridge.
• Has the trouble been solved?
• Yes Completed.
• No Replace the main board or high-voltage power supply unit.
Periodic failure
Cycle
Image Drum 94.25mm
Developing roller 39.68mm
Toner supply roller 58.36mm
Charging roller 37.70mm
Transfer roller 51.52mm
Heat roller 88.12mm
Back-up roller 89.54mm
8. TROUBLESHOOTING PROCEDURES
Handling
Replace or clean the image drum cartridge.
Replace the image drum cartridge.
Replace the image drum cartridge.
Replace the image drum cartridge.
Replace the transfer roller.
Replace the fuser unit Assy.
Replace the back-up roller.
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