V. Troubleshooting
63
3. Electrical
Symptoms
Causes
Countermeasures
Power does not
turn on even
though the power
switch is set to
on.
Power cord not connected, or connected
improperly.
Connect properly.
Lamp does not
light.
Lamp burnt.
Replace with specified lamp.
Lamp burnt too
early.
Non-conforming lamp used.
Replace with specified lamp.
Control cable not connected.
Connect properly.
Brightness
adjustment dial
on the
microscope does
not work.
EXTERNAL switch on the power supply
(CTRL switch when TE-PS30/TE-PSE30 is
used) is OFF.
Turn ON.
Lamp burnt.
Replace with specified lamp.
Dia-illumination
ON/OFF switch on
the microscope
does not work.
Control cable not connected.
Connect properly.
Brightness
adjustment dial
on the power
supply does not
work.
EXTERNAL switch on the power supply
(CTRL switch when TE-PS30/TE-PSE30 is
used) is ON.
Turn OFF.
No focus
adjustment when
the selector
switch on the T-
EFN focus knob is
switched on (only
when the
TE2000-E is used)
Knob connection cable is not connected or is
improperly connected
Connect the cable properly.