ACTinBlack MUM-14, Operator'S Manual

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5-1
CHAPTER 5:
TROUBLESHOOTING
5.1 Troubleshooting Procedures:
Table 5-1 lists common malfunctions that you may find with
your equipment. Perform the tests, inspections and corrective
actions in the order they appear in the table.
This table 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 the equipment
malfunction is not listed or actions listed do not correct the fault,
notify your maintainer.
Malfunction Test for Inspection corrective Action
Monocular Visual. Ensure that the power
fails to switch knob is in the ON or
activate. IR position.
Check for missing, Replace battery or install
improperly installed or correctly.
defective battery.
If MUM-14 still fails to
activate, refer to higher
level of maintenance.
Table 5-1 Troubleshooting
5-2
IR source In a dark location If IR source still fails to
fails to with system turned activate, refer to higher
activate. on, activate IR source. level of maintenance.
Visually check IR
source operation; scene
should brighten.
IR source Visual. Refer to higher level of
indicator maintenance.
fails to
activate.
Poor image Check objective lens Refocus.
quality. or eyepiece.
Check for fogging or Clean lens surface.
dirt on objective lens
or eyepiece lens.
Check eye relief Readjust for proper eye
distance. relief distance.
Light visible
around
eyecup.
Check eyecup for
resiliency.
If eyecup is defective,
refer to higher level of
maintenance.
Diopter Check to see if the If damaged, refer to higher
adjustment diopter adjustment is level of maintenance.
cannot be bent or broken.
made.
Head straps
cannot be
tightened.
Check for defective
buckles, fasteners or
straps.
If damaged, refer to higher
level of maintenance.
Table 5-1 Troubleshooting, (cont.)