Table 4-1. Operator Preventive Maintenance Checks and Services - Continued
Item
No.
I n t e r v al
B – Before Operation
ITEM TO BE INSPECTED
PROCEDURE
B
3
ILLUMINATOR SELECTOR SWITCHES.
C h e c k f o r i l l u m i n a t i o n . S et
i l l u m i n a t o r s e l e c t o r s w i t c h e s
to STAGE, BOTH, and TABLE
p o s i t i o n s . I n T A B L E p o s i t i o n,
o n l y t h e t a b l e i s i l l u m i n a t e d;
in STAGE position, only the
stage is illuminated; and
in BOTH position, table and
s t a g e a r e i l l u m i n a t e d . P a r a 4 -4
TM5-6675-326-14
Equipment Is
Not Ready/Available
I f :
4
EYEPIECES, ATTACHMENT LENS,
MIRROR, MAP LENS. Check for
c h i p s , c r a c k s , d i r t , d u s t , a n d
f i n g e r p r i n t s . C l e a n b y
c a r e f u l l y w i p i n g w i t h l e ns
paper.
Optics are missing
or broken.
4 - 9
