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Maintenance
4–2
760A / 760D / 760N
CAUTION. Do not allow water to get inside any enclosed assembly or component.
Do not clean any plastic materials with organic cleaning solvents, such as
benzene, toluene, xylene, acetone, or similar compounds, because they may
damage the plastic.
After cleaning, carefully check the instrument for defective connections,
damaged parts, and improperly seated transistors and integrated circuits. The
remedy for most visible defects is obvious; however, if heat damaged parts are
discovered, try to determine the cause of overheating before the damaged part is
replaced, otherwise the damage may be repeated.
CAUTION. Static discharge can damage any semiconductor component in this
instrument.
This instrument contains electrical components that are susceptible to damage
from static discharge. Static voltages of 1 kV to 30 kV are common in unpro-
tected environments.
The instrument performance should be checked after each 2000 hours of
operation, or every 12 months if the instrument is used intermittently, to ensure
maximum performance and assist in locating defects that may not be apparent
during regular operation. Instructions for conducting a performance check and
an adjustment procedure are provided in SECTION 5 , PERFORMANCE CHECK
AND CALIBRATION.
CORRECTIVE MAINTENANCE
NOTE. No repair should be attempted during the warranty period.
Foldout Pages. Figure 4–1 illustrates the foldout pages at the back of the manual
which contain useful information for troubleshooting this instrument. Block and
schematic diagrams, circuit board illustrations, and parts locating charts are
located on the foldout pages.
Visual Inspection
Static–Sensitive
Components
Performance Checks and
Readjustments
How To Use This Manual