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3. Gently wipe the surface using a figure eight motion. Repeat until the blemish is removed.
lean the lens only if absolutely required.
6.4.2 Cleaning the Lamp Reflector
Inspect the mirror surface (reflector) for cleanliness when you remove the lamp for replacement. Wear
protective clothing while inspecting or cleaning. Color variations on the reflector are normal.
Remove Dust
1. Brush most of the dust off with a camelhair brush or use a dust-free blower.
2. If some dust remains, leave it. Some dust is inevitable. Avoid unnecessary cleaning.
Remove Fingerprints, Smudges, or Oil
1. Brush most of the dust off with a camelhair brush or use a dust-free blower.
Fold a microfiber cloth and wipe the remaining dust particles off the lens with the smooth portion of the cloth
that has no folds or creases. Do not apply pressure with your fingers. Instead, use the tension in the folded cloth
to remove the dust.
6.5
Inspect and Clean the Lamp Blower
NOTICE! DO NOT bend the impeller blades or loosen the balancing weights.
A clogged lamp blower impeller or motor can reduce air flow leading to overheating and failure of the lamp.
1. Vacuum loose dirt from the lamp blower impeller.
2. If necessary, use a brush with hot water.
3. Fold a clean microfiber cloth and dampen with methanol and wipe evenly with the smooth portion of the
cloth that has no folds or creases. Do not apply pressure with your fingers. Use the solution in the cloth
to collect the dirt.
6.6
Clean the Igniter
Clean the high voltage terminal and insulator to remove accumulated dust or dirt.
6.7
Inspect and Clean the Airflow Interlocks
The D4K35 uses two airflow interlocks; a lamp blower vane switch and an extractor vane switch.
The lamp blower vane switch is located within the lamp cooling compartment. The extractor vane switch is
located just inside the top duct on the projector lid. Check and clean the switches to remove accumulated dust
or dirt that could impede movement if necessary. Within the exhaust duct connected at the top of the projector,
adequate airflow must be maintained and routed outside of the building. Inspect regularly and confirm that 1)
there are no obstructions or "kinks" within the ducting, 2) all air intake areas are unobstructed, and 3) exhaust
airflow is at least 450 CFM* (measured at the rigid end of the duct when not connected to the projector). Refer
to
6.1
Ventilation.
D4K35 Setup Guide
020-100855-02 Rev. 1 (09-2014)
Section 6: Maintenance
6-3
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