Servicing - Agilent Technologies N5242A Service Manual

Safety and Regulatory Information
General Safety Considerations
CAUTION This instrument has autoranging line voltage input. Be sure the supply
voltage is within the specified range.
WARNING Supply voltages which oscillate between the two normal input
ranges of the autoranging line voltage input will damage the power
supply. In rare cases, this damage has become a user safety concern.
If unstable power levels are expected, the analyzer input power must
be buffered by a line conditioner.
CAUTION This product is designed for use in Installation Category II and Pollution
Degree 2 per IEC 61010-1:2001 and 664 respectively.
Do not operate the analyzer with the outer cover removed for more than
CAUTION
30 minutes, as this could cause the analyzer to overheat which could result in
costly damage.
Ventilation Requirements: When installing the product in a cabinet, the
CAUTION
convection into and out of the product must not be restricted. The ambient
temperature (outside the cabinet) must be less than the maximum operating
temperature of the instrument by 4 °C for every 100 watts dissipated in the
cabinet. If the total power dissipated in the cabinet is greater than 800 watts,
then forced convection must be used.
CAUTION The measuring terminals on this instrument are designed to be used with
external signals described in Measurement Category I, but NOT with
external signals described in Categories II, III, and IV. The input of this
instrument cannot be connected to the mains.

Servicing

WARNING These servicing instructions are for use by qualified personnel only.
To avoid electrical shock, do not perform any servicing unless you
are qualified to do so.
WARNING Danger of explosion if battery is incorrectly replaced. Replace only
with the same or equivalent type recommended. Discard used
batteries according to local ordinances and/or manufacturer's
instructions.
WARNING Procedures described in this document may be performed with
power supplied to the product while protective covers are removed.
Energy available at many points may, if contacted, result in personal
injury.
1-4
PNA Series Microwave Network Analyzers
Service Guide N5242-90001
N5241A/42A