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Section 2: Service Guidelines
2.7.6 Exhaust Duct and Lamp Fan Interlocks
Check: Every 6 months
Check and maintain the projector's two vane switches every 6 months. One is located in the exhaust duct and
the other is near the lamp blower. Check operation as follows:
1. Turn power to the projector ON, but do not power up the lamp.
2. Turn OFF the extractor fan.
3. Confirm that the extractor vane switch has indicated an extractor status light error on the TPC Status page.
Turn the extractor fan back ON.
4. Block the air intake at the rear of the projector.
5. Confirm that the lamp blower vane switch has indicated a "blower error". Clear the air intake to correct the
issue.
NOTE: If the exhaust duct becomes significantly blocked, or if a fan fails, the projector's airflow sensor
should trigger a shutdown before the projector becomes overheated or unsafe. Regardless, check the airflow
periodically.
2.8
Maintenance and Cleaning
ELECTRICAL SHOCK HAZARD! Disconnect from AC when servicing. Ensure the proper
protective clothing is worn during maintenance.
To help ensure optimized performance and reliability, regularly check electrical, optical and other components
as described below.
2.8.1 Lamp
Check: Every 60 days or 500 hours
Do the following (always disconnecting from AC first, and wearing authorized protective safety gear):
• Check the contact surfaces of anode (positive) and cathode (negative) connections for cleanliness.
• Clean electrical contact surfaces as necessary to prevent contact resistance from scorching connectors. Use
appropriate contact cleaner.
• Verify that all electrical and lamp connections are tight.
2-6
D4K35 Service Manual
020-100817-01 Rev. 1 (04-2012)
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