LTQ Orbitrap XL Hardware Manual

Functional Description
Printed Circuit Boards
Temperature Controller Board
The board switches the injection and measurement voltages for the
central electrode and the detection electrodes of the Orbitrap.
Resistor-capacitor circuits on the board convert the switching pulse into
a smooth transition between the voltages.
The diagnostic LEDs listed in Table 1-14 show the status of the voltages
applied to the board as well as some operating states. The position of the
LEDs on the board is indicated by the white rectangles in Figure 1-34
on page 1-47.
Table 1-14. Diagnostic LEDs of the Central Electrode Pulser board
No. Name Color Description Normal Operating
Condition
LD1 TRIG Green Trigger signal indicator Flashing when
scanning
LD2 PS Green 24V Power Supply is OK On
The temperature controller board (P/N 207 8930) is located on the top
left side of the instrument, next to the CLT RF main board. See
Figure 1-32 on page 1-45. The temperature controller board keeps the
temperature of the analyzer chamber to a preset value. A Peltier element
that can be used for heating as well as for cooling is used as an actuator.
Activation is done via the serial SPI (Serial Peripheral Interface) bus.
1-48 LTQ Orbitrap XL Hardware Manual Thermo Fisher Scientific