Manual

45
4
PREVENTIVE MAINTENANCE AND
TROUBLESHOOTING
4.1 LUBRICATION INSTRUCTIONS
No lubrication is required.
4.2 TROUBLESHOOTING PROCEDURES
4.2.1. TROUBLESHOOTING
Table 4.1. lists common malfunctions that you may nd with your equipment. Perform the tests, inspec-
tions 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 nd
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.
TABLE 41. OPERATOR’S TROUBLESHOOTING
MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION
1. Monocular fails to activate. Visual.
Check for defective, missing or
improperly installed battery.
Turn power switch to RESET/OFF posi-
tion and then ON.
Replace battery or install correctly.
2. IR source fails to activate. In a dark location with system turned
on, activate IR source.
Visually check IR source operation;
scene should brighten.
If IR source still fails to activate, refer
to higher level of maintenance.
3. IR source indicator fails to
activate.
Visual. Refer to higher level of maintenance.
4. Poor image quality. Check objective lens or eyepiece lens
focus.
Check for fogging or dirt on objective
lens or eyepiece lens.
Refocus.
Clean lens surfaces per paragraph 4.2.
5. Light visible around eyecup. Check eye relief distance.
Check eyecup for resiliency.
Readjust for proper eye relief
distance.
If eyecup is defective, refer to higher
level of maintenance.