Section
V.
TROUBLESHOOTING
c o r r e c t i v e actions. If a malfunction is not listed or is
3-12. General
not corrected by listed corrective actions, notify
a. T h i s
section
contains
troubleshooting
in-
your
supervisor.
f o r m a t i o n for locating and correcting most of the
operating
troubles
which
may
develop
in
the
Troubleshooting
theodolite. Each malfunction for an individual
provides
Refer
to
This
table
c o m p o n e n t , unit, or system is followed by a list of
t r o u b l e s h o o t i n g instructions
at
the
organizational
t e s t s or inspections which will help you to deter-
maintenance level.
m i n e the probable causes and corrective actions to
NOTE
take. You should perform the tests / inspections
Before you use this table, be sure you have performed
a n d corrective actions in the order listed.
all
applicable
operating
checks.
b. This manual cannot list all malfunctions that
may
occur,
inspections
nor
all
tests
or
and
3-3.
Troubleshooting--Organizational
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
COMPASS
1.
COMPASS
CIRCLE
WILL
NOT
ROTATE
FREELY.
Step
1.
Check
for
a
loose
caging
knob.
Tighten
knob
setscrew.
Step
2.
Check
that
compass
is
level.
Level
the
compass.
Refer
to
Step
3.
Dull
compass
needle
screw.
Replace
compass
needle
screw
(para
2.
COMPASS
HOUSING
WILL
NOT
ROTATE
ON
COMPASS
BASE.
Step
1.
Check
if
the
clamp
screw
is
locked.
Release
clamp
screw
(para
3.
REFERENCE
MARK
NOT
CLEARLY
VISIBLE.
Step
1.
Check
compass
eyepiece
focus.
Focus
eyepiece
Step
2.
Dirty
eyepiece
lens.
Clean
external
lens.
4.
COMPASS
ASSEMBLY
WILL
NOT
SEAT
PROPERLY
ON
THEODOLITE
MOUNTING.
Step 1. Check to see if the adjusting screws in the compass mounting yoke are out of adjustment.
Adjust
three
screws
TRIPOD
1.
TRIPOD
LEGS
WILL
NOT
LOCK
INTO
POSITION.
Step
1.
Check
for
loose
tripod
leg
screws.
Tighten
the
screws
with
tripod
wrench
Step 2. Check to see if leg wing screws are damaged.
Replace
wing
screws
2.
EXCESSIVE
PLAY
IN
TRIPOD
LEGS.
Step
1.
Check
for
loose
wing
screws
on
tripod.
Adjust
wing
screws.
Step 2. See if leg adjusting screws are out of adjustment or damaged.
Adjust
or
repair
the
screws.
3.
THEODOLITE
WILL
NOT
SEAT
PROPERLY
ON
THE
TRIPOD
HEAD.
Step 1. See if the bridge screw is properly started.
Reseat
bridge
screw
Step 2. Check for a damaged or worn bridge screw.
Replace
bridge
screw
(para
Step
3.
Check
for
a
damaged
base
plate.
Replace
the
base
plate
PLATE
LEVEL
ASSEMBLY
1.
INSTRUMENT
WIL
NOT
STAY
ON
LINE.
Step
1.
Check
for
an
out-of-level
condition.
Adjust
the
plate
level
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