You should now have a good working knowledge of synchro systems. For further study and
assistance in applying this knowledge to synchro troubleshooting and alignment, consult the following
Pertinent PMS sources:
1. Applicable maintenance instruction manuals.
2. Military Handbook, Synchros, Description and Operation, MIL-HDBK-225A (March 91).
Now that you have completed this chapter, a short review is in order. The following review will
refresh your memory of synchros, their principles of operation, and how they are tied together to form
A SYNCHRO resembles a small electric motor in size and appearance and operates like a variable
Synchros are used primarily for the rapid and accurate transmission of data. They are also used as
control devices in servo systems.