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Bulb goes out during operation (con'd.)
2.
Lamphouse blower B1 failed or obstructed. Clean dust and dirt from blower inlet grille.
Check for 220 V.AC at 7 & 8; replace blower if defective.
3.
Blower fuse F1 blown. Replace if defective (3 A. Slo-Blo).
4.
Lamphouse air vane switch S4 or S5 faulty. Check for vane motion and switch continuity
("NO" to "COM"); adjust or replace as required.
5.
Backdraft from exhaust system. Check exhaust system installation; increase exhaust draft as
required.
6.
Intermittent relay closure in automation controller. Override automation by switching MODE
to "MAN." and check automation controller.
7
Phase loss or brown-out in xenon power supply AC source. Check AC input.
Power supply does not energize when actuated.
1.
S1 door interlock switch, B1 blower, S4 air vane switch, S2 power switch, S3 MODE switch.
Check for correct voltage at each station; replace defective component.
2.
Automation fault. Check for continuity between 3 & 6. See Automation Controller manual.
Use "MAN." mode to override.
ALSO SEE POWER SUPPLY TROUBLESHOOTING
Noise in theatre sound as bulb ignites.
1.
Faulty RF suppression capacitor(s). Remove and test C1, C2, C3, C4A or C4B. Replace if
defective.
2.
Lamphouse, power supply, or sound system not properly grounded. Connect to adequate
earth ground.
3.
Leads between lamphouse and automation contact not shielded. Shield leads in conduit.
Excessive light flicker.
1.
Faulty or aged bulb. Check for cracked or sagging electrodes; replace if defective.
2.
Arc stabilization magnet missing or reversed. Replace or correct (SOUTH pole toward access
door).
3.
Excessive ripple in DC output. See power supply manual.
4.
Projector shutter mistimed. See projector manual.
Reduced light output.
1.
Normal bulb aging. Increase output current. DO NOT EXCEED MAXIMUM CURRENT
SPECIFIED BY BULB MANUFACTURER.
2.
Bulb leakage. Check for high current and low voltage; discoloration of bulb envelope. Re-
place if defective.
3.
Soiled reflector. Clean using commercial glass cleaner. USE NO ABRASIVES.
4.
Soiled projection lens or port glass. Clean as required.
U80/023
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