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Appendix D: User Service
WFM 601A, WFM 601E & WFM 601M User Manual
D–3
CAUTION. Needle-nosed pliers are not recommended in the following step, as
they are more likely to break a bulb.
4. To remove a bulb, position the tweezer tips on the thin, flat portion of the
bulb (close to the plastic socket). Carefully pull the bulb straight out.
5. To install a new bulb, hold it with the tweezers on the flat portion, align the
bulb leads with the socket, and push the bulb in until it snaps into place.
6. Place the panel below the CRT, and press on both the right and left sides of
the panel until it snaps into place.
7. Replace the five knobs below the CRT and tighten the set screws.
Cleaning
Clean the dust from the outside of the waveform monitor with a soft, clean cloth
or small brush. A brush is especially useful for removing dust from around the
selector buttons, knobs, and connectors. Hardened dirt can be removed using a
soft cloth, dampened with a mild detergent solution. Do not use abrasive
cleaners.
CAUTION. Do not allow water to get inside any enclosed assembly or component.
Do not clean any plastic materials with benzene, toluene, xylene, acetone, or
similar compounds, because they may damage the plastic.
Clean the light filter and CRT face with a soft, lint-free cloth dampened in
denatured alcohol. Do not use abrasive cleaners.
Interior cleaning and maintenance should be performed only by qualified service
personnel. Instructions for interior maintenance are provided in the Service
manual.
Replacing the CRT Filter
A smoke-gray filter covers and protects the face of the CRT. If the filter becomes
damaged, replace it by following these steps:
1. Turn off the Power switch and disconnect the AC line cord.
2. Using the Allen wrench, loosen the set screws in the five knobs below the
CRT; then remove the knobs.