31
Photoelectric tube preamplifier
1)
Disconnect the connector between the preamplifier relay board and the preamplifier
board. Then remove the 2 screws fixing the preamplifier board and replace the board.
2)
After the replacement, adjust the sensitivity of the optical system (Refer to 4.6
“Adjusting the sensitivity of the optical system”).
Second collector tube
For how to detach and attach the second collector tube, refer to 3.4.5 “Detaching and
attaching the collector tube (H2).”
