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4.8 Phototube preamplifier
(1) After disconnecting the connector connecting the preamplifier junction board and the
preamplifier board, loosen the two screws fixing the preamplifier board and replace it.
(2) After the replacement is completed, readjust the optical system.
4.9 Second collector tube
For the removal and fixing procedures for the second collector tube,
refer to “3.4.5 Removal and fixing of collector tube (H2)” in “3. Maintenance”.
Phototube preamplifier board
(1 mm)
Phototube preamplifier board
(200 mm)
