Table of Contents
Advertisement
Maintenance
CAUTION
Avoid the use of chemical cleaning agents which might damage the materials used in this
amplifier. Use only Isopropyl alcohol or totally denatured ethyl alcohol. Before using any other
type of cleaner, consult your Tektronix Service Center or representative.
Exterior
Loose dust accumulated on the outside of the amplifier can be removed with a soft cloth or small brush. The
brush is particularly useful for dislodging dirt in and around the side-panel ventilation holes and front-panel
switches.
NOTE
Remove the side panels before cleaning them.
Interior
Cleaning the interior of the amplifier should be necessary only occasionally. The best way to clean the interior
is to blow off the accumulated dust with dry, low-velocity air (approximately 5 lb/in2). Remove any dirt that
remains with a soft brush or a cloth dampened with a mild solution of detergent and water. A cotton-tipped
swab is useful for cleaning in narrow spaces, or for cleaning more delicate circuit components. However, do not
use cotton-tipped swabs near Hypcon connectors.
CAUTION
Be sure that circuit boards and components are dry before applying power. Otherwise electrical
damage may result.
Visual Inspection
The 11A52 should be inspected occasionally for loosely seated or heat-damaged components. The corrective
procedure for most visible defects is obvious; however, particular care must be taken if heat-damaged parts are
found. Overheating usually indicates other trouble in the amplifier therefore, be sure to correct the cause of the
overheating to prevent further damage.
Semiconductor Checks
Periodic checks of semiconductors are not recommended. The best check of semiconductor performance is actual
qperation in the amplifier. More details on semiconductors are given under Troubleshooting later in this
section.
3-2
11A52 Extended Service Manual
(
(
Advertisement
Table of Contents
Troubleshooting
