11-4 Troubleshooting
The instrument is not in Operate. In the MassLynx Tune window, click
.
Tip: When in Operate, the instru-
ment status icon is green.
MCP is set to zero. Set-up the MCP gain.
See also: Setting the optimum gain
for the detector on page 10-52.
The isolation valve is closed. Ensure the isolation valve is open by
checking the Tune window Engi-
neer tab.
See also: The Engineer tab on
page B-39.
Ensure the pneumatic gas is flowing
and set correctly.
See also: Table titled “Gas pres-
sures:” on page 3-2.
The filament is broken. Check the filament current read-
back, if it is incorrect then replace
the filament.
See also: Renewing the filament on
page 10-32.
The wrong inner source has been
fitted for the selected ion mode.
Replace the inner source with the
correct one for the selected ion mode.
See also: Changing the EI/CI inner
source assembly on page 2-2.
The Tune window parameters are
incorrectly set.
Ensure that the normal tuning
parameters are set and, where
appropriate, readback values are
acceptable.
No sample is present. Ensure that sample is loaded
correctly in the autosampler, refer-
ence reservoir, or probe.
No peaks in the Tune window (no ion beam): (Continued)
Possible cause Corrective action
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