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4.6 Optical system unit
(1) Disconnect the connector connecting the preamplifier junction board and the main board
and the connectors of the constant temperature cap and mercury lamp from the power
supply board for the optical system.
(2) Remove the Teflon joints on the 1 mm cell side and 200 mm cell side.
(3) Loosen and remove the three screws fixing the optical system unit.
