TM 11-7025-221-10
CHAPTER
3
MAINTENANCE
INSTRUCTIONS
Para
Page
Subject
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . 3-1
Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Description of Loopback Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Activate Loopback Option Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Terminate Loopback Option Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-5
OVERVIEW
This chapter contains the troubleshooting procedures that can be performed by an operator. There are
no repair procedures authorized for operator-level of maintenance. The troubleshooting procedures do not
require the use of any tools or test equipment.
3-1.
Introduction.
a. Repair of TD-1337(V)/G. When the TD-1337(V)/G needs repair, notify organizational maintenance
of repair required.
troubleshooting flow chart. Operator uses this chart any time a fault is detected, or reported, to determine
the required operator action.
3-2. Troubleshooting Procedures.
Use these procedures when a user reports a problem, one of ALARMS indicators is lit, or one of POWER
indicators is off. Except for using the Ioopback option (described in paragraph 3-3), all the troubleshooting
procedures can be performed without further affecting equipment operation. When the Ioopback option is
used, it is necessary to interrupt user traffic flow.
a. Use of Troubleshooting Chart. Go to the START entry on chart. Then proceed through flow chart
and perform steps as directed. Continue performing the steps as directed until either fault is corrected,
it is determined that no fault exists, or operator is directed to contact supervisor or organizational maintenance
for a specific fault condition. If the specific fault or problem condition is not determined when troubleshooting
chart is used, notify organizational maintenance.
b. Use of Alarms Reca// Routine. Diagnostic information will be displayed when this routine is performed.
It is important that all displayed diagnostic information be recorded (written down) as it is displayed, The
recorded information can be an important part of troubleshooting equipment and system problems.
c. Reporting Faults to Organizational Maintenance. When notifying organizational maintenance of a
problem, the following information should be reported.
(1) Status of ALARMS (normally off) and POWER (normally lit) indicators.
(2) Diagnostic information recorded when alarms recall routine was performed.
(3) Any user reports of faulty conditions that lead to this report.
(4) Any fault condition detected that is not a part of the above conditions.
3-1
