6-4 Maintenance
Replacing Fuses
Introduction
All instruments have factory-installed fuses. If you need to change the fuses, use the
procedure below.
FIRE HAZARD. For continued protection against the risk of fire,
replace fuses only with fuses of the type and rating specified for the instrument.
The fuse compartment is located at the instrument rear, as shown below.
Items Needed
♦ Two fuses of the same type you are removing
♦ Fine flat-tip screwdriver
Procedure
GR1987
GR1990
To replace the fuses:
Step Action
1 Turn off the 2720 Thermal Cycler and disconnect the power cord from the
instrument rear.
ELECTRIC SHOCK HAZARD. Severe electrical shock,
which could cause physical injury or death, can result from working on an
instrument when the high-voltage power supply is operating. To avoid
electrical shock, disconnect the power cord to the instrument before
opening the fuse compartment.
Wait 30 seconds before any further work to let any electrical charges dissipate.
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