Nikon Labophot User Manual

VII. TROUBLE SHOOTING TABLE
Although nowhere the user can find any disorder or derangement in the instrument, if he
encountes some difficulty or dissatisfaction, recheck the use, referring to the table below:
1. Optical
Failures
Causes
)Actions
Darkness at the
• Optical path in trinocular tube not
) Changing-over to the limit
periphery or
fu Ily changed-over
(Refer to P. 9)
uneven bright-
• Revolving nosepiece not in click-
) Revolve it to click-stop position
ness of view-
stop position (Objective not
field
centered in optical path)
(No appearance
• Condenser not centered ) Centering by using field dia-
of viewfield)
ph ragm (Refer to P. 10)
• Field diaphragm too much closed
) Open it properly
• Dirt or dust on the lens
) Cleaning
(Condenser, objective, eyepiece, slide)
• I mproper use of condenser
, Correct use (Refer to P. 10)
Dirt or dust in
• Dirt or dust on the lens
) Cleaning
the viewfield
(Condenser, objective, eyepiece, field lens)
• Dirt or dust on the slide
' Cleaning
• Too low position of condenser
) Correct positioning
(Refer to P. 10)
No good image
• No coverglass attached to slide or
) Correct use (Refer to P. 13)
obtained (low
NCG objective used with coverglass
resolution or
• Too thick or thin coverglass
) Use specified thickness (0.17mm)
contrast)
coverglass (Refer to P. 13)
• Immersion oil soils the top of dry
, Cleaning
system objective (especially 40X)
• Dirt or dust on the lens
) Cleaning
(Condenser, objective, eyepiece, slide)
• No immersion oil used on immersion---+ Use immersion oil
system objective
(Refer to P. 12)
• Air bubbles in immersion oil
) Remove bubbles
• Not specified immersion oil used
) Use Nikon immersion oil
• Condenser aperture and field diaphragm--+ Close properly (Refer to P.l0, 11)
too much opened
• Dirt or dust on the entrance lens
) Cleaning
• Compensation ring in objective not
) Adjustment (Refer to P. 13)
adjusted
• Objective aperture (which provided)
) Open properly
too much closed
Image quality
• Condenser aperture too much closed
) Open properly (Refer to P. 10)
deteriorated
• Too low position of condenser
) Bring it up to coincidence with
field diaphragm image
(Refer to P 10)
Oneside dim-
• Revolving nosepiece not in c1ick-
) Revolve it to click-stop position
ness of image
stop position
21

Nikon Labophot Specifications

General

Illumination	Built-in transmitted light, halogen lamp
Stage	Mechanical stage with coaxial controls
Focus	Coarse and fine focus knobs
Observation Methods	Brightfield, Phase Contrast
Condenser	Abbe condenser
Power Supply	AC 100-240V, 50/60Hz