4-3
TABlE 4-1. pREVENTIVE MAINTENANcE cHEcKS AND SERVIcES
SEq.
NO.
ITEM TO
cHEcK
cHEcKING pROcEDURE
NOT fUllY MISSION
cApABlE If:
7
operation
Switch
Inspect for broken or miss-
ing switch.
Check for operation (with-
out bat ter y) . turn the
switch from oFF to on.
each position should have
a definite stopping point.
Switch missing.
Switch inoperative.
8
reticle
Bright-
ness/Color
adjustment
knob
Inspect for broken or miss-
ing knob.
Check for operation (with-
out bat ter y) . turn the
switch from oFF to maxi-
mum brightness position.
each position should have
a definite stopping point.
Knob missing.
Knob inoperative.
9
Focus Knob
Check to ensure:
— Inspect for broken or
missing knob.;
— there is free rotation of
the focus ring (more than
1/4 turn).
Focus knob missing.
Focus knob cannot be
rotated.
10
remote
Control
Check cable and key for
damage. Check velcro
tape for wear. ensure the
remote control connects to
the scope plug securely.
Cable or key dam-
ag e d. ve l c r o t a p e
missing. Connector
damage affects abil-
ity to connect remote
control to the scope.
11
Mounting
System
Check for damage or cor-
rosion.
Check for proper opera-
tion.
Mount body or axles
damaged.
Fixing nuts or rail with
a fixing projection are
missing.
12
Installation
security
Check the scope which
installed on the arm rail
does not have any move-
ment. tighten fixing nuts if
necessary.
