6 Keysight U1253B User’s and Service Guide
– Do not use repaired fuses or short-circuited fuse-holders. For continued
protection against fire, replace the line fuses only with fuses of the same
voltage and current rating and recommended type.
– Do not service or perform adjustments alone. Under certain condition,
hazardous voltages may exist, even with the equipment switched off. To
avoid dangerous electric shock, service personnel must not attempt
internal service or adjustment unless another person, capable of
rendering resuscitation or first aid, is present.
– Do not substitute parts or modify equipment to avoid the danger of
introducing additional hazards. Return the product to the nearest
Keysight Technologies Sales and Service office for service and repair to
ensure the safety features are maintained.
– Do not operate damaged equipment as the safety protection features
built into this product may have been impaired, either through physical
damage, excessive moisture, or any other reason. Remove power and do
not use the product until safe operation can be verified by service-trained
personnel. If necessary, return the product to the nearest Keysight
Technologies Sales and Service office for service and repair to ensure the
safety features are maintained.
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