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The majority of the troubleshooting procedures presented in this chapter require
the removal of the instrument covers to gain access to test points on printed circuit
boards and other subassemblies.
WARNING
Hazardous voltages are present inside the 682XXB/683XXB
whenever ac line power is connected. Turn off the instrument
and remove the line cord before removing any covers or pan-
els. Troubleshooting or repair procedures should only be per-
formed by service personnel who are fully aware of the
potential hazards.
CAUTION
Many subassemblies in the signal generator contain static-
sensitive components. Improper handling of these subassem
-
blies may result in damage to the components. Always
observe the static-sensitive component handling precautions
described in Chapter 1, Figure 1-3.