Oce TCS400 Self Support Manual page 13

How to initialize the Optimize print quality wizard
Press the on-line / off-line key (key 4 on the folded cover) to set the printer
1
off-line.
Press the lower softkey for 'Optimize print quality' (key 6 on the folded cover)
2
to enter the wizard.
Follow the steps of the wizard.
3
If there are no defective printheads, you can perform a printhead alignment.
4
If you select 'No', the system returns to the off-line menu.
If there are printheads with defective nozzles, you cannot perform a printhead
5
alignment.
If there are printheads with defective nozzles, you can try the following:
Continue the printing without enabling the fallback mode. The output
quality is not optimal.
Enable the fallback mode to continue the printing with optimal output
quality.
Enter the 'Replace printhead' wizard to replace the defective printhead.
Self-support tips (US) 13