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Section 3
Maintenance
This section contains information for performing preventive maintenance, troubleshooting, and corrective
maintenance for the 11A52 Two Channel Amplifier.
Preventive Maintenance
Preventive maintenance performed regularly can prevent or forestall amplifier breakdown and may improve
instrument reliability. The severity of the environment to which the oscilloscope is subjected determines the
frequency of maintenance. A convenient time to perform preventive maintenance is before electrical adjustment
of the amplifier.
Amplifier Shield Removal
The side panels, top-and-bottom frame rails, and front panel reduce radiation of electromagnetic interference
from the oscilloscope. The side panels are held in place by grooves in the frame rails. To remove a panel, pry
the panel out beginning at the rear of the side. To install a panel, position it over the frame rail grooves, then
press down until the panel snaps into place. Exert pressure along the full length of the rails to secure the panel.
NOTE
The 11A52 will not slide into the oscilloscope if the side panels are not fully seated in the rails.
Cleaning
The 11A52 should be cleaned as often as operating conditions require. Dirt on components acts as an insulating
blanket and prevents efficient heat dissipation, which can cause overheating and component breakdown. Dirt
also provides an electrical conduction path and can result in amplifier failure.
NOTE
The cabinet panels of the oscilloscope in which the 11A52 is installed reduce the amount of dust
reaching the interior of the oscilloscope. Operation without the panels in place necessitates more
frequent cleaning.
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1A52 Extended Service Manual
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Table of Contents
Troubleshooting
