TM 11-6660-266-13
CHAPTER 3
UNIT MAINTENANCE
Section I - TROUBLESHOOTING PROCEDURES
Page
SECTION CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
TROUBLESHOOTING PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
THIS EQUIPMENT CONTAINS PARTS AND ASSEMBLIES SUBJECT
TO DAMAGE BY ELECTROSTATIC DISCHARGE (ESD). USE ESD
CONTROL PROCEDURES FOR PROTECTION OF ELECTRICAL AND
ELECTRONIC PARTS, ASSEMBLIES, AND EQUIPMENT IN
ACCORDANCE WITH DOD-STD-1686 CLASS 1 AND DOD-HDBK-283.
GENERAL.
3-1.
This section contains instructions to help the operator and maintenance personnel recognize, find the cause, and
correct equipment malfunctions. This information is presented in three forms: a symptom index, troubleshooting
logic diagrams, and a system cable wiring data table. The symptom index lists the common malfunctions that
may be observed during the operation and/or maintenance of the AN/TMQ-38. The index will assist you in
locating the appropriate troubleshooting diagram to be used to correct the observed malfunction. System level
malfunctions are listed by symptoms for each major component. All symptoms are listed in alphabetical order,
and are cross-referenced to the applicable troubleshooting diagram number and page number where the
corrective action can be found.
The troubleshooting diagrams are composed of a series of operation and decision routines which contain: (1) the
procedural steps necessary to determine the cause of each malfunction, and (2) the steps to be taken to remedy
each malfunction. To isolate a fault, begin at the top of the appropriate troubleshooting diagram, perform the
instructions given, and answer "yes" or "no" to the questions proposed. If the answer is "yes", proceed
downward; if the answer is "no", proceed to the right. By following this procedure the fault is ultimately isolated
and corrected. The wiring data table, Table 3-1, lists the system cables and provides point-to-point wiring
information to aid in the continuity/short testing of the cables.
The symptom index and troubleshooting diagrams cannot list all the malfunctions that may occur, all the tests and
inspections needed to find the fault, or all the corrective actions needed to correct the fault. If an observed
equipment malfunction is not listed or actions listed do not correct the fault, notify your supervisor.
NOTES
l
Troubleshooting information for the MARWIN Processor Unit is
contained in TM 11-6660-280-10.
l
Troubleshooting information for the RDF Unit is contained in
TM 11-6660-281-12.
l
Troubleshooting information for the Digital Communications Terminal
(DCT) is contained in TM 11-5895-1325-12 & P-7-1.
3-1
Previous Page
