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4
General Maintenance
Tools, spare parts, and supplies
Some of the required tools, spare parts, and supplies are included in the GC
shipping kit, MS shipping kit, or MS tool kit. You must supply others yourself.
Each maintenance procedure includes a required materials list.
High voltage precautions
When the MS is plugged in, even if the power switch is off, dangerous voltage
(200/240 VAC) exists on the wiring and fuses between where the power cord
enters the instrument and the power switch.
When the power switch is on, dangerous voltages exist on:
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Normally, all of these parts are shielded by safety covers. As long as the safety
covers are in place, it should be difficult to accidentally make contact with
dangerous voltages.
Do not perform maintenance with the MS turned on or plugged into its power
WAR N IN G
source, unless you are instructed to do so by one of the procedures in this
chapter.
Some procedures in this chapter require access to the inside of the MS while the
power switch is on. Do not remove any of the electronics safety covers in any of
these procedures. To reduce the risk of electric shock, follow the procedures
carefully.
Dangerous temperatures
Many parts in the MS operate at, or reach, temperatures high enough to cause
serious burns. These parts include, but are not limited to:
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7250 Accurate-Mass Q-TOF Troubleshooting and Maintenance Manual
Electronic circuit boards
Toroidal transformer
Wires and cables between these boards
Wires and cables between these boards and the connectors on the back
panel of the MS
Some connectors on the back panel (for example, the foreline power
receptacle)
GC/MS interface
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Table of Contents
Troubleshooting
