Welch Allyn Spot Vital Signs 4400, Service Manual

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Safety
All users of the device must read and understand all safety information presented in this manual
before using or repairing the device.
United States federal law restricts this device to sale, distribution, or use by or on the order of a
licensed medical practitioner.
General safety considerations
• If the device detects an unrecoverable problem, it displays an error message. For more
information, see “Troubleshooting.”
• To ensure patient safety, use only accessories recommended or supplied by Welch Allyn. (See
the accessories list in the Appendix of the Instructions for use.) Always use accessories
according to your facility’s standards and according to the manufacturer’s recommendations
and instructions. Always follow the manufacturer’s directions for use.
• Welch Allyn recommends that only Welch Allyn service personnel or an authorized repair
center perform warranty service. Performing unauthorized service on a device that is within
warranty may void the warranty.
Electrostatic discharge (ESD)
CAUTION
Electrostatic discharge (ESD) can damage or destroy electronic
components. Handle static-sensitive components only at static-safe workstation.
CAUTION
Assume that all electrical and electronic components of the device are
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.
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