A thermal sensor in the body of the
ISPOT 575 EB
protects the unit against overheating.
The thermal sensor removes power from the lamp should the ambient temperature exceed the set maximum or if there is a lack of
air flow or there is a fan malfunction.
Two timers operate simultaneously within the projector to protect the lamp ignitior and power supply against prolonged operation
in non-ideal conditions.
A protection device, inside the electronic ballast, impedes attempts to power up the lamp for more than 3 seconds if the lamp has
failed to ignite. The device will automatically attempt to restart the lamp for a further 3 seconds in every minute.
A software timer reattempts lamp ignition for a period of 20 seconds in every minute for up to 8 minutes; then it preserves the lamp
circuit by not allowing high voltage to the lamp (assuming the lamp to have passed its useful life).
The display will show
LAER
(lamp circuit error) each time an unsuccessful attempt is made to turn on the lamp
NOTE:
it is important to remove power from the fixture if the lamp has reached the end of its life and to replace the lamp.
Whilst every possible precaution has been taken to ensure the trouble-free operation of your
ISPOT 575 EB
, the following perio-
dic maintenance is highly recommended. Mains voltage should be removed prior to attempting any maintenance procedure.
To gain access to the internals of the unit refer to section
17. Opening up the projector
.
periodic cleaning
lenses and reflectors
Even a fine layer of dust can reduce the luminous output substantially. Regularly clean all lenses and the reflector using a soft cot-
ton cloth, dampened with a specialist lens cleaning solution.
fans and air passages
The fans and air passages must be cleaned approximately every 6 weeks; the period for this periodic cleaning will depend, of course,
upon the conditions in which the projector is operating. Suitable instruments for performing this type of maintenance are a brush
and a common vacuum cleaner or an air compressor.
periodic maintenance
lamp
The lamp should be replaced if there is any observable damage or deformation due to heat. This will avoid the danger of the lamp
exploding.
mechanicals
Periodically check all mechanical devices for wear and tear; gears, guides, belts, etc., replacing them if necessary. Periodically check
the lubrication of all components, particularly the parts subject to high temperatures. If necessary, lubricate with suitable lubricant,
available from your
coemar
distributor.
electrical components
Check all electrical components for correct earthing and proper attachment of all connectors, refastening if necessary.
fuse replacement
Locate the fuse, which protects the lamp and electronics, on the base panel of the
ISPOT 1200 EB
.
Using a multimeter, test the condition of the fuse, replacing it with one of equivalent type if necessary..
Attention
Disconnect mains power prior to removing the projector housing.
23. Maintenance
22. Lamp circuit protection
21. Thermal protection
25
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