Agilent Technologies 5977B Series Operating Manual page 145

Scheduled maintenance
Performing the common maintenance tasks when scheduled can reduce
operating problems, prolong system life, and reduce overall operating costs.
(See
Keep a record of system performance (tune reports) and maintenance
operations performed. This makes it easier to identify variations from normal
operation and to take corrective action.
Tools, spare parts, and supplies
Some of the required tools, spare parts, and supplies are included in the GC
shipping kit, MSD shipping kit, or MSD tool kit. You must supply others
yourself. Each maintenance procedure includes a list of the materials required
for that procedure.
High voltage precautions
Whenever the MSD is plugged in, even if the power switch is off, potentially
dangerous voltage (120 VAC or 200/240 VAC) exists on:
• The wiring and fuses between where the power cord enters the instrument
When the power switch is on, potentially dangerous voltages exist on:
• Electronic circuit boards
• Toroidal transformer
• Wires and cables between these boards
• Wires and cables between these boards and the connectors on the back
• Some connectors on the back panel (for example, the foreline power
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.
Perform no maintenance with the MSD turned on or plugged into its power source
WA R N I N G
unless you are instructed to by one of the procedures in this chapter.
5977B Series MSD Operating Manual
Table 16 on page 144.)
and the power switch
panel of the MSD
receptacle)
General Maintenance 6
145