TM5-6675-326-14
Table 3-1. Operator Preventive Maintenance Checks and Services - Continued
Item
No.
3
4
I n t e r v a l
B
B Before Operation
ITEM TO BE INSPECTED
PROCEDURE
EIGHT, LEFT, AND COMBINED ZOOM
K N O B S . Turn knobs fully to
right. Pull combined zoom
k n o b u p . R o t a t e l e f t a n d r i g ht
zoom knobs. Observe left and
right images change size.
T u r n k n o b s f u l l y t o r i g h t .
Adjust knobs until images are
equal in size.
MOUNTING FOCUS KNOB AND FOCUS
ADJUSTMENT.
Move mounting focus
knob on optical mount until right
eye image is clearly focused.
Move focus adjustment on left
eyepiece to focus left eye image.
Equipment Is
Not Ready/Available
I f :
Images do not
change size or
cannot be matched
i n s i z e .
Unable to focus
right image.
3 -5