Oki LP-1040 Maintenance Manual page 278

■Technician troubleshooting
Check printing using the engine test pattern 18
Fuser unit
Clean the heat roller contact (see p. 3-70)
OK
Not solved
End of procedure
Check the other possible problem locations
Transfer roller unit
Clean the transfer roller (see p. 3-67)
Yes OK
End of procedure
Replace the transfer roller unit (see p. 9-217)
OK
Not solved
End of procedure
Check the other possible problem locations
Chapter 7 Printer Image Quality Problems Troubleshooting
Developer unit
Replace the developer unit (see p. 9-35)
OK
Not solved
End of procedure
Check the other possible problem locations
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