User's Manual

385700-1006-006 MAINTENANCE AND TROUBLESHOOTING
Document use is restricted to that described on cover 5-4
NOTE
The following table only isolates faults to
the LRU level. The test procedures in
Section III of this chapter provide
assistance for further fault isolation. If an
LRU fails, return it to the equipment
manufacturer for maintenance or repair.
Step Fault Indication Fault Description Corrective Action
1 MDR front panel
POWER ON
indicator not lit
when power is on.
Possible loose power
cable connection,
faulty power cable,
power switch in
OFF
position, faulty power
supply, or faulty power
indicator.
Ensure that the power cable is properly
and securely connected to the radio and
power supply. After the cable is properly
and securely connected, place the power
switch in the
ON
position. Refer to
section 5.4.1,
If the appropriate DC voltage is not
present, the fault is elsewhere. Refer to
the appropriate documentation for
vendor equipment. Refer to section
5.3.1, place MDR.
2 BDR front panel
POWER ON
indicator not lit
when power is on.
Possible loose cable
connection, faulty
power cable power
switch in
OFF
position,
faulty power supply, or
faulty power indicator.
Ensure that the power cable is properly
and securely connected to the radio and
power supply. After the cable is properly
and securely connected, place CB1 in
the
ON
position and listen for the unit
fan. If the fan is not functioning, remove
and replace the radio. Refer to section
5.3.2, place BDR. Return the radio to the
equipment manufacturer. Refer to
section 2.1.2 for equipment returns.
Refer to the appropriate documentation
for vendor equipment.
NOTE: The unit voltage range for the corrective action procedure is the full input supply
range of the unit.
Table 5-2 Radio Assembly Fault Isolation