Electrostatic Discharge (Esd) - Welch Allyn 53 Service Manual

Electrostatic Discharge (ESD)

• A monitor that has been dropped or otherwise damaged or abused must not be used
until it has been tested and verified by qualified service personnel for proper operation.
• If the monitor detects an unrecoverable problem, an error code and a brief message
appear in the message display. Report all such errors to Welch Allyn.
• While under warranty, the monitor must be serviced only by a Welch Allyn service
technician.
Electrostatic Discharge (ESD)
CAUTION
SENSITIVE ELECTRONIC DEVICES
DO NOT SHIP OR STORE NEAR STRONG
ELECTROSTATIC, ELECTROMAGNETIC,
MAGNETIC OR RADIOACTIVE FIELDS.
Warning Electrostatic discharge (ESD) can damage or destroy electronic
components. Handle static-sensitive components only at static-safe
workstation.
Consider all electrical and electronic components of the monitor as static-
sensitive.
Electrostatic discharge is a sudden current flowing from a charged object to another object or
to ground. Electrostatic charges can accumulate on common items such as foam drinking
cups, cellophane tape, synthetic clothing, untreated foam packaging material, and untreated
plastic bags and work folders, to name only a few.
Electronic components and assemblies, if not properly protected against ESD, can be
permanently damaged or destroyed when near or in contact with electrostatically charged
objects. When you handle components or assemblies that are not in protective bags and you
are not sure whether they are static-sensitive, assume that they are static-sensitive and
handle them accordingly.
• Perform all service procedures in a static-protected environment. Always use techniques
and equipment designed to protect personnel and equipment from electrostatic
discharge.
• Remove static-sensitive components and assemblies from their static-shielding bags only
at static-safe workstations—a properly grounded table and grounded floor mat—and
only when you are wearing a grounded wrist strap (with a resistor of at least 1 megohm
in series) or other grounding device.
Service Manual
ATTENTION
OBSERVE PRECAUTIONS
FOR HANDLING
ELECTROSTATIC
SENSITIVE DEVICES
6
Safety Summary
Vital Signs Monitor Series 300