TM 11-7025-221-20
Section Il. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
There are no PMCS applicable to organizational maintenance.
Section Ill. TROUBLESHOOTING
Para
Page
Subject
TD-1337(V)/G Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NVM CHECKSUM ERROR Troubleshooting . . . . . . . . . . . . . . . . . .
Inactive
Mode
Change
Troubleshooting
.
.
.
Power Distribution Troubleshooting . . . . . . . . . . . . . . . . . .
ALARMS BUS Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . .
How to Use Alarms Recall Data . . . . . . . . . . . . . . .
A d d i t i o n a l Troubleshooting Procedures . . . . . . . . . . . . .
OVERVIEW
This section contains troubleshooting procedures for isolating a malfunction to an assembly or item that
organizational maintenance is authorized to replace. Malfunctions are detected by an abnormal front panel
display, by communications from personnel at another equipment location, or by the inability to process
orderwire calls.
Always start troubleshooting by using the procedures in paragraph 2-9. The procedures in this paragraph
will direct you to replace suspected faulty assemblies, and in some cases direct you to another paragraph
to continue troubleshooting. If replacement of the items called out in the troubleshooting procedures does
not correct the fault, refer the problem to DS maintenance.
The troubleshooting procedures in this section do not cover faulty system operation that could be caused
by improper system configuration data entered in NVM. If you suspect a configuration problem, the orderwire
and system configuration data in NVM should be displayed and checked using the display routines in
TM 11-7025-221-10.
If during the course of troubleshooting, you observe physical damage (such as broken wiring) beyond
your authorized repair capability, report the problem to next higher level of maintenance.
2-11
