Honeywell Vibrex 2000 User Manual page 254

Chapter 6 – Maintenance
RPM but quits working as the RPM increases), also there
could be no tape, the tape has not been applied in the beam,
or there is an open in the photocell wiring.
Vibration Unstable - Is caused by unstable vibration
characteristics. This problem could be resulting from a poor
location (flimsy mount) or a loose mounting structure
supporting dynamic components on the aircraft. It can also
be caused by another component turning at or near the same
rate as the component being measured, such as unbalanced
tail rotor shaft that interferes with the tail rotor balance.
Normally a spectrum examination will reveal this problem.
6.4.2
This section gives a table and helps that explain a variety of
general Vibrex unit troubleshooting operations. If the needed
help is not shown here, contact Honeywell Customer Support
(see Section 1.2 "Product Support").
The user may also refer to the maintenance manual for the
subject aircraft. In any case, when the problem is unknown,
return the unit to the factory for repair.
NOTE: The table in this section lists problems and
solutions in order, according to their relative simplicity. To
locate and/or order specific parts, see the diagram and
table under Section 6.3.7 "Complete Unit Disassembly".
6.4.2.1
The following table provides a basic Vibrex 2000 and Vibrex
2000 Plus troubleshooting guide:
Possible Cause
Problem: Vibrex Unit Not Turning On
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Troubleshooting Guide
Reference Table
Corrective Action
13841 Rev A
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