LTQ Orbitrap XL Hardware Manual

Functional Description
Printed Circuit Boards
The power distribution board controls the vacuum system and the
system power supplies, including the linear ion trap. Depending on the
quality of the vacuum and the status of the turbo molecular pumps, it
switches the vacuum gauges, the pumps, and the 230 V relays. It
controls external relays with 24 V dc connections. In case of a vacuum
failure, it initiates an automatic power down of the instrument. The
board also switches the valve that controls the flow of the HCD collision
gas.
The power distribution board indicates all system states and error
messages by status LEDs (see Table 1-9 on page 1-41) in the middle of
the left side of the board. A green LED indicates that the status is OK.
An orange LED indicates a status that differs from normal. The position
of the LEDs on the board is indicated by a white oval in Figure 1-30 on
page 1-39.
The system status LEDs on the front side of the instrument (See
Figure 1-4 on page 1-6.) are controlled by the power distribution board.
The information partially comes from external boards (for example, the
Communication LED is controlled by the instrument control board).
(Refer to topic “Instrument Control Board” on page 1-37.)
Diagnostic LEDs show the status of voltages applied from the board to
other devices. The positions of the diagnostic LEDs on the board are
indicated by white rectangles in Figure 1-30 on page 1-39.
1-40 LTQ Orbitrap XL Hardware Manual Thermo Fisher Scientific