Hitachi ED-A110A1DN Service Manual page 62

Disassembling / Assembling the Optics Unit
4.
Follow the procedure below to disassemble / assemble the Optics Unit.
(1)Disassembling/Assembling Dichroic optics unit
Remove 4 screws to detach the Dic hroic optics unit from bottom bracket.
Never remove the other screws.
Tighten 4 screws to attach the Dichr oic optics unit to bottom bracket.
Combine two parts of dichroic unit to
CP-A100 / ED-A100 / ED-A110 (A1DN)
part of lens.
62
Meter screw
Tapping screw
part of lens
parts of dichroic unit