4-4
4.2. TROUBLESHOOTING
4.2.1. GENERAL
This section contains information for locating and removal most of
the
ThOR
operating troubles which may occur. Each malfunction
for an individual component or assembly is followed by a list of
tests or inspections that will help determine probable causes and
corrective action to take. Perform the tests/inspections and cor-
rective actions in the order listed.
This manual cannot list all possible malfunctions that may occur,
or all tests or inspections and corrective actions. If a malfunction
is not listed (except when malfunction and cause are obvious), or
is not corrected by listed corrective actions, contact to the service
center.
4.2.2. TROUBLESHOOTING PROCEDURES
TroubleshootingproceduresarelistedinTable4-2.
TABLE 4-2. TROUBLESHOOTING PROCEDURES
PROBLEM PROBABLE CAUSE CORRECTIVE ACTION
Image is absent Batteries are missing
or improperly installed.
Insert batteries or install cor-
rectly.
Batteries are dead. Replace batteries.
Batteries contact sur-
faces or contact springs
dirty or corroded.
Clean the contact surfaces
with a pencil eraser and/or
alcohol and cotton swabs.
Cannot achieve
the sharp image
of the object.
Objective and output
lenses dirty.
Clean thoroughly the lenses
surfaces.
Damaged optical com-
ponents.
Send the sight to the service
center.
The brightness
of t h e im ag e
on the screen
is low.
The batteries have a
low voltage.
Replace the batteries.
Factory alignment bro-
ken.
Send the scope to the ser-
vice center.
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