Yamaha YSP10 Service Information page 111

In the Mark Adjust screen, check the condition of the mask's aperture as
indicated below:
Mask aperture shape

Check on the monitor that the mask aperture is a clean circle. If not, perform automatic mask cleaning
and redo from step 18.
Other items to check

See step 16 for information.
Monitor
Press the [Utilities] button. The CalibSm screen for print feedback adjustment
reappears.
Press the [Measure] button. The machine measures the mask apertures then the
solder masks on the board.
SI1906002E-001=YSP10 installation and adjustment procedures
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