HP 437B Service Manual

HP 437B
8-2
Warning ie
Caution mm
SERVICE
8-6. Warnings and Cautions
Pay attention to the WARNINGS and CAUTIONS. They must he followed
for your protection and to avoid damage to the equipment.
Maintenance described herein must be performed with power supplied to the
instrument and with the protective covers removed. Such maintenance should
be performed only by service trained personnel who are aware of the hazards
involved (for example, fire and electrical shock). Where maintenance can be
performed without power applied, the power should be removed.
Any interruption of the protective (grounding) conductor (inside or outside of
the instrument), or disconnection of the protective earth terminal will create a
potential shock hazard and could result in personal injury. Grounding one
conductor of a two-conductor outlet is not sufficient. Whenever it is likely
that the protection has been impaired, the instrument must be made
inoperative (i.e., secured against unintended operation).
If the instrument is to be energized via an autotransformer (for voltage
reduction), make sure the common terminal is connected to neutral (that is,
the grounded side of the mains supply).
Make sure that the 250 volt normal-blow fuses with the specified current
rating are used for replacement. Do not use repaired fuses or short- circuited
fuse holders. To do so could create a shock or fire hazard.
Some printed circuit boards contain devices that may be damaged if the
board is removed or installed while the power is on. Verify that the LINE
switch is OFF or that the power cord is unplugged before you remove or
install a printed circuit board.
After removing devices from sockets, store the devices with the pins in
conductive foam. This will prevent accidental damage from a static
discharge.

HP 437B Specifications

General

Brand	HP
Model	437B
Category	Measuring Instruments
Language	English