Oki LP-1040 Maintenance Manual page 556

6.
Perform calibration for A1 size paper.
When you have finished calibration for A0
size paper, perform the same procedure and
print 3 copies in succession of test pattern
No.5.
* You should generally start adjusting from A0
size, even for A1 size smearing.
If you can see smearing in the print samples
at any location, change the heat roller speed
control parameter by -10 or -20.
* Normally you will have finished skew/slack
calibration using A0 size, so if A1 size does
not line up you can fix the problem by
calibrating the heat roller speed.
If calibrating the speed alone does not fix the
problem, check both A1 and A0 sizes and
perform the calibration again.
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