6
TROUBLESHOOTING
GUIDE
II
YOU
are
unable to obtain full performance from
your
microscope,
please
consult the table below
for
pointers
for
trouble shooting'
Trouble
I
Cause
I
RlImildv
1. Optical system
a) With light source switched
Bulb socket cord
is
not completely Chock
and
tighten connection,
on,
field
of
vielll'
is
dark,
connected
\0
lamp housing. (p,
'I)
Bulb
is burned
out.
Replace
defective bulb
{p.4)
Bulb
YOltage
seleclOf
knob
is
set
al
Increase
bulb
voltage.
(p.3)
too
low
VOltage
position.
Bulb
is
not
centered.
center
bulb.
(p. 4)
Too
many
filters
afe
engaged. Minimize filters in number.
(po
6)
Fuse is burned
out
Remove cause for fuse burning
and
replacadelective
fuse.l2nd
cover)
Line voltage selector SWitch
is
not
50"
selector switch
<0
local line
matched
to
local
line
voltage. voltage.
{po
41
bl Field of view is cuI off or
Nosepiece
is
not
clicked
into
posi·
Slightly
rotate
nosepiece
until
"
illuminated
unevenly.
tion.
clicks in position.
Filter
stops
midway.
Slide
filter
into
correct
position.
Phase
slider is
not
engaged
in
cor·
Ma",
slider
completely
until
a
rect
position.
clicks
into
position.
(po
7)
<I
Dust
or
dirt
is visible
in
Dirty
specimen Clean specimen.
field
of
view.
Dust
on
eyepiece
Clean eyepiece
front
lens
d)
Excessive image contrasts
Apenure
iris diaphragm
is
SlOPPed
Open aperture
properly.
(p. 6)
down
too
much.
'I
Resolution
problems
Objective
i,
"0<
correctly
posi·
Slightly
rotate
nosepiece
until
a
•
Image is
not
sharp.
tioned in
light
path.
clicks
into
position.
(po
10)
•
Insufficient
contrast
Aperture
iris diaphragm is stopped
Adjust
aperture
properly.
(p.
6)
•
Image details
l8<:k
defini·
down
(or
opened up)
too
much.
lion.
C£lrrection
collar
is
not
adjusted.
Adjust
collar
correctly,
ched:ing
image in focus. (p. 6)
Dust
on
condenser lens, objective, Clean.
eyepiece, and specimen vessel, etc.
Thickness
of
specimen slide,
bot·
Use
vessel
of
bottom
thickness
less
tom
of
vessel, etc. is over 2 mm. than 2
mm.
(p.
6)
•
No
effective
phase can·
Brightfield
objective
is
used,
Use
phase contrast objective.
(Po
7)
Hast
Light
annulus
of
condenser is
not
U"
li~t
annulus
matching
with
matched With phase annulus
of
objective. (p,
7)
objective.
Light
annulus and phase annulus are
center
annuli
correctly.
not
concentric.
(p.7)
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