7-20. OSA 2A1A1 - SHUTTER
INPUT CODE: OSADAS
This module tests the ability of photomultiplier bracket assembly 2A1A1A7
shutter to respond to open and close commands.
The OSA is cleared, which programs
the shutter closed.
The operator opens the OSA door. The door interlock is tested
by programming the shutter to open.
The interlock should prevent the shutter from opening; if it does not, a prompt
is displayed at the completion of the test.
The operator closes the OSA door and the shutter is programmed to open. The
shutter status is checked.
If the shutter remains closed, a prompt is displayed.
b. REPLACEMENT PROCEDURE REFERENCE
The following list provides a cross reference of replacement items to
The item column identifies the item to be replaced by
reference designation and part number.
The reference column identifies the
procedural paragraph used to perform the replacement action. The VDT screen will
display the proper sequence of repair/replace actions.
(Ref Des/Part No.)
2A2A6XX (SLOT 403)/13083412
2A2A6XX (SLOT 408)/69331B