Tektronix Grass Valley 4000, Installation And Service, Page: 222 / 286

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Section 4 — Maintenance
To clean or replace the air filter in the Signal Processor Frame, refer to Figure 4-12
and proceed as follows:
1. Release the quarter turn captive screws on the front door of the Signal
Processor Frame and open the door.
2. At the bottom of the frame card bay assembly locate the square air filter access
hole.
3. Slide the filter out of the frame to the front by inserting a finger into the access
hole and moving the air filter far enough out to be grasped and pulled the rest
of the way out.
CAUTION
If the system is under power, do not reinstall the filter until it is thoroughly dry.
Failure to follow this precaution could result in damage to the equipment due to
shorting raised by residual moisture.
4. Clean the filter with a vacuum cleaner and/or wash it in a warm water and
detergent solution. Rinse the filter thoroughly with fresh water, and air dry
completely.
Figure 4-12. Signal Processor, Air Filter Removal
0621-403
Bottom
of Signal
Processor
Frame
Air Filter
Access
Hole
Slide-in
Air
Filter