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L
AMP
About the discharge lamp
The MAC 550 Profile is designed to use the OSRAM HTI 400
W/D3 lamp. This highly-efficient double-ended short-arc source
provides a color temperature of 7500K, a color rendering index
greater than 80, an average service life of 750 hours and hot
restrike.
Warning!
Installing any other lamp may create a safety
hazard or damage the fixture!
To reduce the risk of explosion, replace the lamp before usage
exceeds 125% of the average service life, i.e., before usage
exceeds 940 hours. To read lamp hours from the control panel,
please refer to "Readouts" on page 12.
For maximum service life, avoid turning off the lamp before it
has warmed up fully.
Lamp replacement
Important! Do not touch the quartz bulb with bare fingers.
Replacement lamps are available from your Martin dealer.
The clear quartz bulb must be clean and free of any oils from
your fingers. Clean the lamp with an alcohol wipe and polish it
with a dry cloth, particularly if you accidentally touch the bulb.
To repl ace t he lamp
1 Disconnect the fixture from power and allow it to cool
completely. Lock the head right-side up.
2 Release the 4 quarter-turn fasteners marked with arrows
on the rear plate. Pull the lamp assembly straight back as
far as it goes and let it rest in place.
3 Push down the retention spring on the right end of the
socket and push out the pin. You can use a screwdriver to
pry the lamp out of the socket as shown in Figure 2. Remove the lamp.
6
MAC 550 Profile
Figure 1: Lamp access
Figure 2: Lamp removal
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