34401A Service Guide iii
Safety Information
General
Do not use this product in any manner not
specified by the manufacturer. The protective
features of this product may be impaired if it is
used in a manner not specified in the
operation instructions.
Do not install substitute parts or perform any
unauthorized modification to the product.
Return the product to an Agilent Technologies
Sales and Service Office for service and repair
to ensure that safety features are maintained.
Ground the Instrument
If your product is provided with a grounding-
type power plug, the instrument chassis and
cover must be connected to an electrical
ground to minimize shock hazard. The ground
pin must be firmly connected to an electrical
ground (safety ground) terminal at the power
outlet. Any interruption of the protective
(grounding) conductor or disconnection of the
protective earth terminal will cause a potential
shock hazard that could result in personal
injury.
Cleaning
Clean the outside of the instrument with a soft,
lint-free, slightly dampened cloth. Do not use
detergent or chemical solvents.
Safety Symbols
WARNING
Main Power and Test Input
Disconnect: Unplug instrument
from wall outlet, remove power
cord, and remove all probes from
all terminals before servicing. Only
qualified, service-trained
personnel should remove the
cover from the instrument.
WARNING
Line and Current Protection
Fuses: For continued protection
against fire, replace the line fuse
and the current-protection fuse
only with fuses of the specified
type and rating.
WARNING
Front/Rear Switch: Do not change
the position of the
Front/Rear switch on the front
panel while signals are present on
either the front or rear set of
terminals. The switch is not
intended as an active multiplexer.
Switching while high voltages or
currents are present may cause
instrument damage and lead to the
risk of electric shock.
Earth Ground
Chassis Ground
Risk of electric shock
Refer to manual for additional
safety information
Alternating Current
On supply
Off supply
‘In’ position of bi-stable push switch
‘Out’ position of bi-stable push
switch
CAT II (300V)
IEC Measurement Category II.
Inputs may be connected to
mains (up to 300 VAC) under
Category II overvoltage
conditions.