Adjustments After Replacing The Laser Optics Housing Unit - Gestetner B147 Service Manual

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
Decal 1 SP2-109-3
Decal 2 Not used
Decal 3 Not used
Decal 1
Jp:xxxxx P:46,41
600dpi 1200dpi
B146R152.WMF
NOTE: The values on decals 2 and 3 do not need to be input, as the machine
performs the main scan registration correction for each color during
automatic line position adjustment.
3. Print out the following test pattern (Cross Stitch M) 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.
Adjustment not completed
6. Execute SP5-993-2 or "Auto Colour Registration" in the User Tools
(Maintenance > Colour Registration > Auto Colour Registration > OK).
SM
Value on the right
SP2-109-2
Not used
Not used
Decal 2
Jp:xxxxx KC:-2,-2
K C
B146R150.WMF
Feed direction
Adjustment completed
3-39
LASER OPTICS
Function
Laser beam pitch
Main-scan registration
correction for black and cyan
Main-scan registration
correction for magenta and
yellow
Decal 3
Jp:xxxxx MY:-2,-2
M
B146R151.WMF
B146R153.WMF
B147/B149/B190
Y