Ricoh A229 Service Manual page 588

Tech Service Bulletin No. A229 – 007
Page 4 of 5
2. Laser Beam Pitch Adjustment
(This is to verify that the laser beam pitch is correctly adjusted.)
No
Start
Write down value of
SP2109-1.
Print Pattern No. 12 of
SP2902-2. (Print A)
Do vertical lines
appear?
Yes
Change SP2109-1 by +40
steps.
Perform SP2109-3.
Print Pattern No. 12 of
SP2902-2. (Print B)
Change SP2109-1 by -80
steps.
Perform SP2109-3.
Print Pattern No. 12 of
SP2902-2. (Print C)
Compare Print B and Print
Is Print C better (less
vertical lines)?
Yes
Change SP2109-1 by -4
steps. (Repeat can be
done within 10 times.)
Perform SP2109-3.
Print Pattern No. 12 of
SP2902-2.
No Did vertical
lines
Yes
If not improved, go to Next Page
Note: Refer to the SP number outside
the flow for 600 dpi.
600 dpi: SP2109-2
600 dpi: No.13 of SP2902-2
600 dpi: SP2109-2
600 dpi: SP2109-4
600 dpi: No.13 of SP2902-2
600 dpi: SP2109-2
600 dpi: SP2109-4
600 dpi: No.13 of SP2902-2
No
Change SP2109-1 by +4
steps. (Repeat can be
done within 10 times.)
600 dpi: SP2109-2
Perform SP2109-3.
600 dpi: SP2109-4
Print Pattern No. 12 of
SP2902-2.
600 dpi: No.13 of SP2902-2
Did vertical
lines
Yes
No
Continued...