HP E1418A, Service Manual

Page: 11 / 96

WARNING
USING AUTOTRANSFORMERS. If the mainframe 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 main’s supply).
CAPACITOR VOLTAGES. Capacitors inside the mainframe may
remain charged even when the mainframe has been
disconnected from its source of supply.
USE PROPER FUSES. For continued protection against fire
hazard, replace the line fuses only with fuses of the same
current rating and type (such as normal blow, time delay, etc.).
Do not use repaired fuses or short-circuited fuseholders.
SHOCK HAZARD. Only service-trained personnel who are
aware of the hazards involved should install, remove, or
configure the module. Before you remove any installed module,
disconnect AC power from the mainframe and from other
modules that may be connected to the module.
CHANNEL WIRING INSULATION. All channels that have a
common connection must be insulated so that the user is
protected from electrical shock. This means wiring for all
channels must be insulated as though each channel carries the
voltage of the highest voltage channel.
CAUTION
MAXIMUM VOLTAGE. The maximum voltage that can be applied to
any channel is 42 V Peak/42 Vdc. The maximum voltage from any
channel to ground is 42 V Peak/42 Vdc.
STATIC ELECTRICITY. Static electricity is a major cause of
component failure. To prevent damage to the electrical components in
the module, observe anti-static techniques whenever working on the
device.
PARTS REMOVAL. This module uses a surface mount printed circuit
assembly. Special soldering equipment is required for parts removal or
replacement. Use of standard soldering equipment will cause damage
to the printed circuit board and is not covered under warranty.
Chapter 1 General Information 11