Servicing - Keysight N5224A Service Manual

Safety and Regulatory Information
General Safety Considerations
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.
CAUTION Do not operate the analyzer with the outer cover removed for more than 30 minutes, as this
could cause the analyzer to overheat which could result in costly damage.
CAUTION Ventilation Requirements: When installing the product in a cabinet, the 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.
CAUTION Do not operate the analyzer with the outer cover removed for more than 30 minutes, as this
could cause the analyzer to overheat which could result in costly damage.
WARNING No operator serviceable parts inside. Refer servicing to qualified personnel. To prevent
electrical shock, do not remove covers.
WARNING The opening of covers or removal of parts may expose dangerous voltages. Disconnect the
instrument from all voltage sources while it is being opened.
1-4
PNA Series Microwave Network Analyzers
N5224A and N5225A
Service Guide N5225-90001