User`s guide

Chapter 8 Maintenance and Troubleshooting
8-22 PerSeptive Biosystems
8
8.2.3 Hardware Troubleshooting
This section includes:
• Mass spectrometer troubleshooting
• Vacuum gauge panel troubleshooting
Table 8-4 Mass Spectrometer Troubleshooting
Symptom Possible Cause Action
Internal stepper motor
making noise when the
sample plate is moving
Normal operation of the
sample plate stepper
motor
No action. Normal
occurrence.
High whining sound when
you power up the mass
spectrometer
Normal startup operation
of the turbo pump
No action. Normal
occurrence.
Internal stepper motor
making grinding noise
when the sample plate is
not moving or is moving
erratically.
“Home or Load position
not found” may be
displayed on startup.
Problem with sample
positioning system
1. Reboot computer by
pressing Control+Alt+
Delete.
Do not restart
software.
2. Call PerSeptive
Biosystems Technical
Support.
In Automatic Control
mode, center of sample
position is not aligned with
laser spot, as observed on
the video monitor
Sample plate not aligned Align. See Section 2.7,
Aligning the Sample Plate.