Oki ML520 Service Manual page 19

1. Printhead Gap Adjustment
This is a SERVICE ADJUSTMENT made by a technician.
It is covered in Section 3.3 of this Service Handbook.
The Adjustment measures 0.014 +/- 0.001 inches 90.35, +/-0.03 mm).
2. Printhead Gap Adjustment
This is a MENU ITEM in the SET-UP Group.
It fine tunes the automatic setting of the printhead gap.
The settings are 0, 1 and -1.
Use 1 to darken print (if output is consistently light).
Use -1 to lighten print (if output is consistently dark).
3. Gap Control
This is a MENU ITEM in each (Paper Feed) Group.
The Groups are REAR FEED, BOTTOM FEED, and TOP FEED.
Gap Controls determines how the printhead gap is set.
The settings are listed below.
Auto Gap, Semi Auto Gap, 1, 2, 3, 4, 5, 6, 7, 8, 9
An explanation of each setting follows.
Auto Gap
This is the factory default.
Automatically determines paper thickness of the first page.
During single-sheet feed, each page's thickness is checked while a job is
printing.
Semi Auto Gap
Similar to Auto Gap.
Automatically determines paper thickness of the first page.
During single-sheet feed, each page's thickness IS NOT checked "while" a
job is printing.
1, 2, 3, 4, 5, 6, 7, 8, 9