This volume contains troubleshooting requirements and procedures for direct support and general support
(DS/GS) maintenance of the M19 and M24 Periscopes. See Volume II for maintenance procedures.
a. Chapter 2, Checkout Procedure, gives you flow charts to follow to check that the periscope is
b. Chapter 3, Fault Symptom Index, lists the fault symptoms and where to look in this manual to fix
c. Chapter 4, Fault Isolation Procedures, shows you step-by-step how to troubleshoot the fault
d. Appendix A, Wiring Diagrams, may be used to help you find the cause of a fault. They can be
used to trace signal flow or to find out what a voltage should be.