Trouble Shooting Table - Nikon Labophot Instruction 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
• Optical path in trinocular tube not
) Changing-over to the limit
fu Ily changed-over
(Refer to P. 9)
• Revolving nosepiece not in click-
) Revolve it to click-stop position
stop position (Objective not
field
centered in optical path)
(No appearance
• Condenser not centered ) Centering by using field dia-
ph ragm (Refer to P. 10)
m too much closed
) Open it properly
on the lens
) Cleaning
objective, eyepiece, slide)
• I mproper use of condenser
, Correct use (Refer to P. 10)
• Dirt or dust on the lens ) Cleaning
(Condenser, objective, eyepiece, field lens)
• Dirt or dust on the slide
' Cleaning
ition of condenser
) Correct positioning
(Refer to P. 10)
• No coverglass attached to slide or
) Correct use (Refer to P. 13)
NCG objective used with coverglass
resolution or
• Too thick or thin coverglass
) Use specified thickness (0.17mm)
coverglass (Refer to P. 13)
soils the top of dry
, Cleaning
tive (especially 40X)
• Dirt or dust on the lens
) Cleaning
objective, eyepiece, slide)
• No immersion oil used on immersion---+ Use immersion oil
system objective
(Refer to P. 12)
n immersion oil
) Remove bubbles
immersion oil used
) Use Nikon immersion oil
aperture and field diaphragm--+ Close properly (Refer to P.l0, 11)
too much opened
• Dirt or dust on the entrance lens
) Cleaning
n ring in objective not
) Adjustment (Refer to P. 13)
• Objective aperture (which provided)
) Open properly
osed
Image quality
• Condenser aperture too much closed
) Open properly (Refer to P. 10) • Too low position of condenser
) Bring it up to coincidence with
field diaphragm image
(Refer to P 10)
• Revolving nosepiece not in c1ick-
) Revolve it to click-stop position
stop position
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