Agilent Technologies 8935 Series, Manual

Page: 97 / 343

96 Chapter 4
Preventative Maintenance
Hardware Maintenance
Integrity
The Test Set has been designed for rugged conditions, however parts
can become loose or damaged over time and may require repair or
maintenance.
• Module Insertion and Alignment
The Test set contains circuit assemblies and RF modules that are
mounted in sockets and board guides. It is extremely important that
these assemblies be firmly seated and aligned in their guides.
Remove the Test Set’s cover and check that boards align with the
printed guides on the internal sheet metal covers. Ensure that each
of the six RF module cases are firmly seated and locked in with their
module bracket(s).
• Type-N Connectors
The Test Set’s RF IN/OUT, ANT IN, and DUPLEX OUT connectors
should be checked for damage or looseness. Damage can occur to the
center conductor pin or the connector itself might become loosened.
If damaged, the connector should be replaced. A loose connector can
be re-tightened with the nut on the back side of the side panel. Refer
to
Chapter 5 , “Disassembly,” on page 101 for information on the
side-panel connectors.
• Internal Cables and RF Connectors
The Test Set contains numerous cables and connectors that should
be periodically checked for proper insertion and tightness. Remove
the Test Set’s cover and visually check for any cables that may not be
properly inserted. Check each RF cable connection for tightness,
tighten where needed. Refer to
Chapter 5 , “Disassembly,” on page
101 for information on the various cables and assemblies.