General Maintenance
6.
Do not slide the circuit boards over any surface.
7.
Avoid handling circuit boards in areas that have a
fl
oor or work-surface
covering capable of generating a static charge.
Inspection and Cleaning
Inspection and Cleaning
describes how to inspect for dirt and damage. It also
describes how to clean the exterior and interior of the instrument. Inspection and
cleaning are done as preventive maintenance. Preventive maintenance, when done
regularly, may prevent malfunction and enhance reliability.
Preventive maintenance consists of visually inspecting and cleaning the
instrument and using general care when operating it.
How often maintenance should be performed depends on the severity of the
environment in which the instrument is used. A proper time to perform preventive
maintenance is just before any instrument adjustment.
General Care
The cabinet helps keep dust out and should normally be in place during operation.
WARNING.
To prevent injury or death, power off the instrument and disconnect it
from line voltage before performing any procedure that follows.
Interior Cleaning
Use a dry, low-velocity stream of air to clean the interior of the chassis. Use a
soft-bristle, non-static-producing brush for cleaning around components. If you
must use a liquid for minor interior cleaning, use a 75% isopropyl alcohol solution
and rinse with deionized water.
Exterior Cleaning
Clean the exterior surfaces of the chassis with a dry lint-free cloth or a soft-bristle
brush. If any dirt remains, use a cloth or swab dipped in a 75% isopropyl alcohol
solution. Use a swab to clean narrow spaces around controls and connectors. Do
not use abrasive compounds on any part of the instrument that may damage the
chassis.
CAUTION.
Avoid the use of chemical cleaning agents that might damage the
plastics used in the instrument. Use only deionized water when cleaning the
front-panel buttons. Use a 75% isopropyl alcohol solution as a cleaner and
rinse with deionized water. Before using any other type of cleaner, consult your
Tektronix Service Center or representative.
18
WVR7200 Waveform Rasterizer Service Manual
