Gestetner G060 Service Manual page 451

Main scan dot position correction
NOTE: Before adjusting the scanner, adjust the printer registration.
1. Enter the SP mode and open SP4-010 and SP4-011.
2. Check that each value corresponds to the factory-set value.
3. Press the Interrupt key and copy the C-4 chart in the full-color photo mode.
NOTE: Be sure to copy in the photo mode. This is because color displacement
cannot be checked properly in text mode.
4. Check the yellow and cyan vertical lines. (Use a Magnification Scope to do
this.) If they exactly overwrite the black line at the edges of the copy, exit the
SP mode to end the adjustment. If the yellow and cyan lines significantly
extend beyond the black line, proceed to the next step.
5. Press the Interrupt key to return to the SP mode and open SP4-932. Compare
the current values against the table.
SP4-932-1 Dot correction R left edge
SP4-932-2 Dot correction R right edge
SP4-932-3 Dot correction B left edge
SP4-932-4 Dot correction B right edge
SM 3-3
IMAGE ADJUSTMENT
G570