HGM300 Power Supply Replacement
2
P/N 3015-5686 Rev 0
SECTION 1: SCOPE
This document explains how to replace the 120 VAC power supply circuit board of an HGM300
with a new power supply circuit board (P/N 3015-5675).
SECTION 2: PREREQUISITES
Before replacing the power supply circuit board, it is important to:
•
review all safety precautions
•
understand specification changes (for example, new fuse specifications)
•
familiarize yourself with the internal hardware components of the HGM300 and their
locations within the HGM300 enclosure
•
gather tools required to perform the replacement.
2.1. SAFETY PRECAUTIONS
Be sure to review all of the safety precautions listed below before performing ANY maintenance
on the HGM300 – including replacing the power supply circuit board.
AC POWER SUPPLY WARNING:
Ensure the source voltage matches the voltage of
the product before energizing the equipment. It is highly suggested that the
HGM300 be placed on a separate circuit with UPS or surge protection. A switch or
circuit-breaker shall be included in the building installation. It shall be in close
proximity to the equipment and within easy reach of the operator. It shall be
marked as the disconnecting device for the equipment.
PROTECTIVE GROUNDING WARNING:
Under no circumstances should this
equipment be operated without connection to a protective ground. Failure to
observe this warning poses a potential shock hazard and is also a violation of
electrical safety standards applicable to this type of equipment.
WORKING INSIDE THE INSTRUMENT:
Extreme care should be exercised when
accessing the interior of this instrument. Only qualified electrical maintenance
personnel should perform connections and adjustments. Always de-energize the
power supply before working inside the instrument.
EXPLOSIVE ATMOSPHERE WARNING:
Do not operate this equipment in the
presence of flammable liquids, vapors or aerosols. Operation of any electrical
instrument in such an environment constitutes a safety hazard.
EXHAUST VENTING WARNING:
It is imperative that the exhaust port on this
instrument be properly vented as described in this manual. Failure to do so
constitutes a safety hazard.
