Hi-Target HTS-420R - Instrument Parts Identification; Instrument Part Names

HTS-420R Maintenance Manual
6
Loosen the 2 screws and take long vial out.
Horizontal Tangent Screw Unit
Figure 2-14 fixing screws
Open the display unit (face 2), then unscrew the 2 screws and take the whole tangent screw unit out.
Vertical Tangent Screw Unit
After taking out the cover, do the same thing as done for Horizontal tangent screw unit.
Figure 2-15 fixing screws