Tektronix WFM 601i, User Manual

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Appendix C: User Service
WFM601i Serial Component Monitor C–4
Replacing the CRT Filter
A smoke-gray filter is installed over the face of the CRT. If the filter becomes
damaged, it can be replaced in the following manner:
1. Remove the five knobs below the CRT.
2. Insert a small, straight-blade screwdriver into the recessed area on either the
right or left side of the panel. Pry gently until the panel snaps out of the
front-panel frame. See Figure C-1 for panel and recess location.
3. Remove the two Torx

screws that fasten the bezel to the instrument.
4. Grasping the bottom of the bezel, pull out and upward to remove the bezel
from the instrument. (There are two hinges at the top of the bezel that hold it
in place; once the bezel is at an approximate 45
°
angle with the front panel,
they will disengage.)
5. Remove the damaged filter and snap the new filter into place on the back
side of the bezel. Position the ridged side of the filter towards the CRT to
eliminate unwanted visual effects on the CRT face.
6. Replace the bezel and bezel screws. Tighten screws (8 in/lbs).
7. Replace the panel below the CRT, and press on both the right and left sides
of the panel until it snaps into place.
8. Replace the five knobs below the CRT and tighten the set screws.