7
TROUBLESHOOTING GUIDE
Under certain conditions, performance of the unit may be adversely affected by factors other than defects. If problems
occur, please review the following list and take remedial action as needed.
If you cannot solve the problem after checking the entire list, please contact your local Olympus representative for
assistance.
Problem Lamp Cause Remedy Page
Bulb does not light.
LED Power is not ON.
Set the main switch to “ I ” (ON).
10
Common Power cord is unplugged. Plug power cord into the power
outlet.
34
Common Connectors are connected im-
properly.
Connect connectors securely.
32
Halogen Bulb is not attached. Attach a halogen bulb.
32
Halogen Bulb is burned out. Replace bulb.
32
Halogen The TL4 is not ON. Set the main switch of the TL4
to “ I ” (ON).
7
Bulb is blown immediately. Halogen The bulb is not a designated
one.
Replace bulb with a designated
one.
1
Field of view is dark.
LED LIM setting is inappropriate. Set LIM again.
13
Common Aperture and field iris diaphragms
are not opened wide enough.
Adjust them to proper sizes.
12
Common
Light path selector knob is set to
the
position.
Set the knob to the
or
position.
20
Common Condenser is not properly cen-
tered.
Center the condenser.
12
Common Condenser height is too low. Adjust correctly.
12
Common ND filter is engaged. Disengage the ND filters.
14
Brightness cannot be varied.
LED LIM is not ON. Switch the LIM function OFF.
13
Halogen LED brightness adjustment knob
is rotated.
Use the brightness adjustment
knob of the TL4.
7
Common Condenser is not properly
centered.
Center the condenser.
12
Common Condenser height is too low. Adjust correctly.
12
Field of view is obscured or not
evenly illuminated.
Common Light path selector knob is set in
an intermediate position.
Set to the desired click position.
20
Common Objective is not correctly enga-
ged.
Make sure that the revolving
nosepiece clicks properly into
place.
–
Common Condenser top lens is not swit-
ched properly.
Swing out the top lens when
using a 4X or higher-power
objective.
12
Common An objective that falls outside
of the condenser’s illumination
range is used.
Use the objective with the specified
magnification.
30
Common Condenser is not properly
centered.
Center the condenser.
12
Common Field iris diaphragm is stopped
down too far.
Open the field iris diaphragm to
an optimum size.
12
Halogen Bulb is not mounted correctly. Push the pins of halogen bulb all
the way until the stop position.
32
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