Covidien Force FX, Service Manual

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Service Personnel Safety
Intr
oduction
Force FX Electrosurgical Generator C Service Manual
1-5
Servicing
Calibration
Always turn off and unplug the generator before cleaning.
Do not touch any exposed wiring or conductive surfaces while the generator is disassembled and
energized. Never wear a grounding strap when working on an energized generator.
When taking measurements or troubleshooting the generator, take appropriate precautions, such
as using isolated tools and equipment, using the “one hand rule,” etc.
Potentially lethal AC and DC voltages are present in the AC line circuitry, high voltage DC circuitry,
and associated mounting and heat sink hardware described in this manual. They are not isolated
from the AC line. Take appropriate precautions when testing and troubleshooting this area of the
generator.
High frequency, high voltage signals that can cause severe burns are present in the RF output
stage and in the associated mounting and heat sink hardware described in this manual. Take
appropriate precautions when testing and troubleshooting this area of the generator.
Precaution
Read all warnings, cautions, and instructions provided with this generator before servicing.
The generator contains electrostatic-sensitive components. When repairing the generator, work at
a static-control workstation. Wear a grounding strap when handling electrostatic-sensitive
components, except when working on an energized generator. Handle circuit boards by their
nonconductive edges. Use an antistatic container for transport of electrostatic-sensitive
components and circuit boards.
Notice
After installing a new low voltage power supply, verify that the voltages are correct.
Precaution
To avoid inadvertent coupling and/or shunting of RF currents around the resistor elements, keep
the resistors at least 4"(10.2 cm) away from any metal surface including tabletops and other
resistors. This is especially true if several resistors are connected in series or parallel to obtain a
specified value. Do not allow the resistor bodies to touch each other.
Notice
After completing any calibration step, proceed to the next step to save the values from the
completed calibration step.
Do not activate the generator with any load resistor higher than 10 ohms (10
Ω
) while calibrating
the current sense gain. Otherwise, product damage will result.
Warning