Oki ES5112dn Maintenance Manual page 41

Periodic failure
Cycle
Image Drum 94.25mm Replace or clean the image drum cartridge.
Developing roller 39.68mm Replace the image drum cartridge.
Toner supply roller 58.36mm Replace the image drum cartridge.
Charging roller 37.70mm Replace the image drum cartridge.
Transfer roller 51.52mm Replace the transfer roller.
Heat roller 88.12mm Replace the fuser unit Assy.
Back-up roller 89.54mm Replace the back-up roller.
Handling
In case of error printing
• Does the contact plate of the transfer roller contact the TR terminal of
the high-voltage power supply unit properly? (See Figure 2-4 ,
Section 6.2(6))
• No Adjust the contact plate so that it contacts the TR terminal
of the high-voltage power supply unit properly.
• Yes Replace transfer roller.
• Has the problem been solved?
• Yes Completed
• No Is LED Head installed properly? (Check the HEAD0 connector
of main board and PC connector of LED Head.)
• No Install LED Head properly.
• Yes Replace LED Head or Head cable.
• Has the problem been solved?
• Yes Completed
• No Replace the main board or high-voltage power supply unit.
2. Procedures for Repairing
2-25