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September 25, 2007 1:07 am, 4376782_Maintain_the_System.fm
Chapter 6 Maintain the System
Infrequent Maintenance
Applied Biosystems StepOne
™
and StepOnePlus
™
Real-Time PCR Systems
Installation, Networking, and Maintenance Guide
120
Notes
Replace the External Fuses
Replace the fuses of the instrument as needed.
Materials
Required
• Fuses, 10 A fast-acting 250 VAC Slo-Blo
®
• Small flatblade screwdriver
About the Fuses
The instrument uses two 10 A fast-acting 250 VAC fuses to protect the system
electronics from power surges. When replacing one fuse, Applied Biosystems
recommends that you replace the companion fuse, regardless of its condition.
Note: Acceptable AC line voltage tolerances are 100, 120, 220, 230 ±10%; 240 VAC
+6%/–10%, 50/60 Hz ± 1%.
FIRE HAZARD. For continued protection against the risk of fire,
replace fuses only with Listed and Certified fuses of the same type and rating as those
currently in the instrument.
SHOCK HAZARD. To protect yourself against shock hazards, use a
properly wired three-terminal outlet. Do not use an adapter to a two-terminal outlet since
this does not provide positive ground protection.
Replace the
Fuses
ELECTRICAL 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
supply to the instrument, unplug the power cord, and wait at least 1 min before working
on the instrument.
1. Power off the instrument.
2. Disconnect the power cord from the back of the instrument.
2
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