FrancisFrancis FX560 - Manual (Page 20)

7-
Fault Finding
All fault finding must be conducted by a competent person or qualified Electrical Engineer.
Please refer to the following table for the trouble-shooting of Xenon lamps.
Fault Cause Remedy
„ Wrong Polarity „ Lamp incorrectly fitted
„ Faulty wiring
„ Anode (large electrode)
must always be on top in
vertical burning position
„ Check polarity, transpose
connections if necessary
„ Cap overheated
„ Cap temperature above
230°C
„ Faulty contacts
„ Cooling equipment
defective
„ Check terminals, tighten or
renew
„ Check cooling equipment
and replace if necessary
„ Arc unsteady „ Lamp operated outside
current control range
„ Magnetic stabilisation for
horizontal operation
defective
„ Correct current setting
„ Check magnetic
stabilisation
„ Bulb draws in air „ Crack in graded seal
caused by overheated cap
„ Maximum cap temperature
230°C
„ Check terminals - tighten
or renew
„ Glass erosion on fused
quartz bulb „ Lamp operated outside
current control range
„ Lamp service life
exceeded
„ Correct current setting
„ Check meter
„ Electrodes damaged
„ Premature blackening
„ Current ripple too high
„ Auxiliary mirror incorrectly
adjusted
„ Have power supply
inspected
„ Adjust auxiliary mirror
„ Asymmetrical blackening
of lamp (in horizontal
burning position)
„ Lamp operated too long in
same position
„ Turn lamp through 180°
after half service life