Nikon D810 - Manual (Page 472)

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❚❚ Manual Cleaning
If foreign matter can not be removed from the image sensor
using the Clean image sensor (0 445) option in the setup
menu, the sensor can be cleaned manually as described below.
Note, however, that the sensor is extremely delicate and easily
damaged. Nikon recommends that the sensor be cleaned only
by Nikon-authorized service personnel.
1
Charge the battery or connect an AC adapter.
A reliable power source is required when inspecting or
cleaning the image sensor. Turn the camera off and insert a
fully-charged battery or connect an optional AC adapter and
power connector. The Lock mirror up for cleaning option is
only available in the setup menu at battery levels over J.
2
Remove the lens.
Turn the camera off and remove the lens.
3
Select
Lock mirror up for cleaning.
Highlight Lock mirror up for
cleaning in the setup menu and
press 2.