11
Chapter 5 Maintenance
This chapter covers cleaning, inspection, trouble-shooting, and
specifications for the Bird 8890 series loads.
Troubleshooting
The table below contains troubleshooting information for problems
which can occur during normal operation. This manual cannot list all
malfunctions that may occur, or their corrective actions. If a problem
is not listed or is not corrected by the listed actions, notify a qualified
service center.
WARNING
Never attempt to connect or disconnect RF equipment from the
transmission line while RF power is being applied.
Leaking RF energy is a potential health hazard.
PROBLEM POSSIBLE CAUSE CORRECTION
Leaking coolant Loose clamping band Tighten the clamping band
Defective or improperly
installed O-ring
Replace the O-ring
(See “Load Resistor” on page 14)
High or low dc
resistance
Loose RF input connector Tighten connector
Faulty RF input connector Replace connector
(See “RF Connector” on page 14)
Faulty resistor Replace the resistor
(See “Load Resistor” on page 14)
Overheating
radiator
RF power too high Lower RF power (See “Specifications” on
page 16 for maximum RF power)
Coolant level too low Check the coolant level. Add coolant if
necessary (See “Coolant Level” on page 13)
Coolant degraded Replace the coolant
(See “Coolant Level” on page 13)
Faulty resistor Replace the resistor
(See “Load Resistor” on page 14)
