Service manual

30 July, 2001 LASER OPTICS
3-11
Replacement
Adjustment
Adjustments after Replacing the Laser Optics Housing Unit
1. Enter SP mode.
2. Input the values printed on three decals on the new laser optics housing unit
into the following SPs. Each decal contains two values.
Value on the left Value on the right Function
Decal 1 SP2-109-3 SP2-109-2 Laser beam pitch
Decal 2 SP2-994-4 SP2-994-3 Main-scan registration
correction for black and cyan
Decal 3 SP2-994-2 SP2-994-1 Main-scan registration
correction for magenta and
yellow
3. Print out the following test pattern (17: cross-stitch main-scan) with SP5-997.
4. Check these test patterns. If the laser beam pitch is not correct, vertical black
strips seem to appear.
• Cross-stitch pattern: The thin lines should be of uniform thickness (no striping
effect should appear on the printout).
5. Adjust the laser beam pitch values in SP2-109-2 and -3 until the printout is
correct, as shown below.
6. Execute SP5-993-2 or “Auto Adjust” with the Maintenance menu in the user
tools.
Jp:xxxxx KC:-2,-2
CK
G060R004.WMF
Jp:xxxxx MY:-2,-2
YM
G060R006.WMF
Jp:xxxxx P:46,41
1200dpi600dpi
G060R005.WMF
G060R002.WMF
Decal 1
Decal 2
Decal 3
Feed direction
Adjustment not completed Adjustment completed