Tektronix 4000 Series, Service Manual

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Maintenance
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Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual
Preventive maintenance consists of visually inspecting and cleaning the
oscilloscope and using general care when operating it.
How often you do maintenance depends on the severity of the environment in
which the oscilloscope is used. A proper time to perform preventive maintenance
is just before oscilloscope adjustment.
The cabinet helps keep dust out of the oscilloscope and should normally be in
place when operating the oscilloscope.
The display is a soft plastic display and must be treated with care during
cleaning.
CAUTION.
Improper cleaning agents or methods can damage the flat panel
display.
Avoid using abrasive cleaners or commercial glass cleaners to clean the display
surface.
Avoid spraying liquids directly on the display surface.
Avoid scrubbing the display with excessive force.
Clean the flat panel display surface by gently rubbing the display with a
clean-room wipe (such as Wypall Medium Duty Wipes, #05701, available from
Kimberly-Clark Corporation).
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.
WARNING.
To avoid injury, power down the instrument and disconnect it from
line voltage before performing any procedure that follows.
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 chassis that may
damage the chassis.
General Care
Flat Panel Display
Cleaning
Interior Cleaning
Exterior Cleaning