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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.

Problem

a) Field of view is obscured, or field of

view is not evenly illuminated.

b) The lamp does not light even when

the main switch is set to "

c) The burner light flickers or is dark.

d) The burner is extinguished in the

middle of observation.

Cause

The objective is engaged improperly in

the light path.

The revolving nosepiece is installed

improperly.

The field iris diaphragm is stopped down

too much.

The burner is not centered.

Connectors are inserted improperly.

" (ON).

The interlock mechanism of the lamp

housing is activated.

The temperature switch is activated by

heating.

The auto ignition mechanism is

malfunctioning.

No burner is installed.

Enough time has not elapsed since the

burner ignition.

The burner service life has expired.

The temperature switch is activated

because the ventilation openings of the

lamp housing are blocked.

U-RFL-T/U-RX-T

Remedy

Engaging the objective in the click

position of the revolving nosepiece.

Push the revolving nosepiece all the

way in.

Open the field iris diaphragm.

Adjust the centering.

Connect them firmly.

Tighten the lamp socket clamping

screw firmly.

Remove any obstacle from around the

ventilation openings, and wait until the

unit cools down before setting the

main switch to "

" (ON) again.

Set the main switch @ to "

once, and wait 10 seconds or more and

set the main switch @ to "

" (ON) again.

Install a burner.

# Never turn the unit ON without in-

stalling a burner. It is extremely

hazardous and may cause a fail-

ure.

Wait until the arc stabilizes.

If the hour counter indicates time

above the service life, replace the

burner.

Remove any obstacle from around the

ventilation openings, and wait until the

unit cools down before setting the

main switch to "

" (ON) again.

Page

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" (OFF)

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