HP 54501A - Page 89

6-17
. SELFTESTS
The selftests are used for
isolating
problems
in the HP 54501 A . Akeydown
power-upmust be
performed
before invoking the HP 54501A selftests . This ensures critical parameters to the
selftests are set to known values to avoid any erroneous results .
The selftests may be invoked
from any menu
by pressing
the front-panel UTIL key and then
select-
ing selftest menu softkey .
Figure 6-12 is the available choices in the HP 54501A Selftest Menu .
The tests may be run individually or, by selecting test all softkey, consecutively . After each selftest
has been completed, a message of pass or fail for that selftest will be displayed . If failed messages
are displayed for components
or circuitry on the System Board Assembly, it may help to perform
the adjustment
procedures in section 4 of this manual . If the selftests continue to fail, the System
Board
Assembly must be returned to the factory for service . Component level troubleshooting is
not supported in this manual .
The loop test in the SELFTEST MENU is used for factory service only
.
Figure 6-12 . HP 54501A Selftest Menu Selections
HP 54501A SERVICE