Maintenance-2445A/2455A Service
Entry into
the
monitor
is
automatic if a power -up test
fails.
The
user
may
also force entry into the Diagnostic
Monitor from
the
normal operating
mode
by holding
in
the
front-panel
AV
and
At push buttons
and
then pressing the
front-panel
SLOPE
push button. Exiting the monitor
is
accomplished
by
pressing
in
the
NB
TRIG
push button,
as
instructed by the CRT readout display.
Depending
on
how the Diagnostic Monitor was entered
(from normal
mode
or
as
a result of a power-up test
failure),
the first
menu
item displayed may vary; entry into
6-10
the monitor from the normal mode begins at ALL TESTS
while entry from power-up starts at the first
failed
test.
Since,
in
a failure
mode,
the
CRT
readout
may
not
be
able
to display the selected
menu
item, the VERT
TRIGGER
SOURCE indicator illuminates
as
a reference
when
ALL
TESTS
is
selected. With the VERT
TRIGGER
SOURCE
indicator illuminated, the user
may
scroll to the desired
test or exerciser routine using the test order
called
out
in
Table
6-4
or Table 6-5 respectively. Whether the
menu
is
displayed or not, scrolling
is
accomplished by pressing
either the front-panel upper TRIGGER
MODE
switch to
increment or the lower TRIGGER
MODE
switch to decre-
ment the
menu
position by one.
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