Waters GCT Premier Operator's Manual page 263

No peaks in the Tune window (no ion beam): (Continued)
Possible cause
Communication failure.
The source components are dirty.
The source components have been
incorrectly assembled.
Analyzer or source trip level is set
too low and has cut off the voltages.
Unsteady or low intensity peaks (ion beam):
Possible cause
Problem with sample delivery
(autosampler, GC system).
The source components are dirty.
Corrective action
Ascertain the status of the
embedded PC. If necessary, reboot
the embedded PC using the
embedded PC's power switch.
See also: Viewing the status of, and
rebooting, the instrument's
embedded PC on page
Clean the source components.
See also: Cleaning the inner source
components on page
Ensure that the source voltage read-
backs vary with the Tune window
setting. If any of these voltages are
absent, disassemble and correctly
reassemble the source assembly.
See also: EI/CI inner source
maintenance on page
Increase the trip levels on the
engineers tab.
See also:
The Engineer tab on page
Corrective action
Troubleshoot the autosampler.
Look for pressure variation on
injection.
Clean the source components.
Cleaning the complete
See also:
outer source on page
Component hardware troubleshooting
B-18.
10-20.
10-18.
B-39.
10-37.
11-5