------------------------------------------------------------------------- LM-7800 User Guide
17
a.
Turn on the machine. Make sure that there is nothing on the lens cap.
b.
If you encounter the message “No Signal” or “Out of range”, please clean the 4-
pin hole. And then turn on again.
c.
If the problem persists, please contact your local distributor or the manufacturer.
d.
Otherwise, check the values SPH, CYL, AXIS at Measurement Screen about
which is explained in the section 8.1 ‘Measurement screen’.
e.
If SPH, CYL, or AXIS aren’t zero, clean the 4-pin hole. And then turn off and on
again. If the problem persists, please contact your local distributor or the
manufacturer.
f.
If SPH, CYL, and AXIS are zero, it’s okay with your equipment.
6.3.
Display protection function
When the instrument is not used for a few minutes, display protection function works
automatically. In display protection mode, the instrument shows several different
pictures for protecting the display component. If you press any button on this mode, it
will return to the measurement screen. Be sure that don’t turn off this display protection
function in the User Setup Display without an unavoidable reason.