Tektronix TLA 714, Service Manual

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Maintenance
4–2
TLA 714 Color Portable Mainframe Service Manual
5. Handle circuit boards by the edges when possible.
6. Do not slide the circuit boards over any surface.
7. Avoid handling circuit boards in areas that have a floor or work-surface
covering capable of generating a static charge.
WARNING.
To avoid electric shock, always power off the chassis and disconnect
the power cord before cleaning or servicing the chassis.
Inspection and Cleaning
The portable mainframe is inspected mechanically and electrically before
shipment. It should be free of marks or scratches and should meet or exceed all
electrical specifications. To confirm this, inspect the chassis for physical damage
incurred during transit. Retain the chassis packaging in case shipment for repair
is necessary. If there is damage or deficiency, contact your local Tektronix
representative.
Cleaning procedures consist of exterior and interior cleaning of the chassis.
Clean the chassis as needed, based on the operating environment. Refer to the
appropriate module service manuals for information on cleaning individual
TLA 700 Series modules.
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.
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.
Clean the On/Standby switch using a dampened cleaning towel. Do not spray or
wet the switch directly.
Interior Cleaning
Exterior Cleaning