643. Setting Up Y our Projector3-3. Mounting the Lens UnitThe lens units that can be attached to this projector are shown in the following table.MODEL MagnifyingL2K-10F1 0.93L4K-11ZM 1.24–1.73L4K-15ZM 1.52–2.10L4K-20ZM 1.98–3.34L2K-30ZM 2.71–3.92L2K-43ZM1 3.91–5.52L2K-55ZM1 5.00–7.80NOTE:• The other NEC optional lenses are not available on this model.• The projector and lenses are made of precision parts. Do not subject them to shock or excessive forces.• Remove the lens unit when moving the projector. If not, the lens could be subject to shock while the projector is being moved,damaging the lens and the lens shift mechanism.• When removing or installing the lens unit, return the position of the lens to the center before turning off the power to the projector.If the position of the lens is not returned to center, the front cover will interfere with the lens and the cover cannot be removed orinstalled.• When installing or removing the lens unit, first confirm that the main power switch to the projector is off, and then disconnectthe AC power supply. After the AC power supply has been disconnected, allow the projector to sufficiently cool before startingthis work.• Never touch the lens surface while the projector is operating.• Be very careful not to let dirt, grease, etc., on the lens surface and not to scratch the lens surface.• Perform these operations on a flat surface over a piece of cloth, etc., to prevent the lens from getting scratched.• When leaving the lens off the projector for long periods of time, mount Dust-proof cushion on the projector to prevent dust ordirt from getting inside.Mounting and adjustment of optional lenses must be performed by a qualified technician.The lens unit mounting procedure is roughly the same.• For L2K-30ZM, L2K-43ZM1, and L2K-55ZM1, attach the gearbox cover.• For the L4K-20ZM, the lens cover's ring must be removed.At the same time, the image adjustment mechanism by manual besides the focus adjustment is also equipped onthe L4K-11ZM, L4K-15ZM and L4K-20ZM.
