Care & Maintenance - Takahashi Mewlon-180C Instruction Manual

The primary mirror of the Mewlon-180C is exposed directly to the open air. If the surface of
the mirror is left covered with dust and dew, it will become dim and reduce the contrast of
images. Using the following procedures, clean up dust from the surface of the mirror using
a hand blower at the regular intervals. When you set the tube back on to the mirror, set it
precisely in place with the cell. Then, the optical axis will be hardly out of order.
1. Place the tube assembly on its front on a
level surface.
2. Holding the visual back; stand the tube
assembly on its front, take out the cell
cap, and remove the three screws
holding the primary mirror cell.
Care & Maintenance
Remove the three screws
in the places shown.
3. Pull up the primary mirror cell slowly, with
great care not to touch the mirror to the
inside wall of the tube. Especially watch
these screw heads on the lower ring of
the tube. Make sure the long baffle tube
comes out completely from the tube.
When the cell is tightly set, lift it out very
slowly with great care.
4. Place the primary mirror with the cell and
the baffle on a desk as illustrated and
blow off dust by a blower.
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