681XXC OM 6-11Signal Generator Quits During Operation(OPERATElight remains on)
TroubleDescription: The signal generator operates for some time,
then shuts down (OPERATElight remains on). After a short period, the
signal generator resumes normal operation. This is an indication that
the 681XXC has reached an excessive operating temperature.
Step 1 Check that the fan is still operating during the time that the
instrument is shut down.
qIf the fan is still operating, clean the air filter (see page
6-13).
qIf the fan is not operating, call a service technician.
LOCK ERROR is Displayed
TroubleDescription: This message is displayed in the frequency pa-
rameters area to indicate that the output frequency is not phase-
locked. It is normally caused by an internal component failure.
Step 1 Perform a self-test of the signal generator by pressing the
System Menu soft-key Selftest.
qIf self-test does not result in an error message(s), resume
normal operation.
qIf an error message(s) is displayed, call a service techni-
cian.
Table6-4. Troubleshooting(2 of 3)
OPERATOR
MAINTENANCE TROUBLESHOOTING