AT&T 6300 Service Manual page 274

DIAGNOSTICS
4 • TEXT WITH 200 LINE GRAPHICS: This test is similar
to the 400 Line Graphics test and displays the same self­
explanatory messages. (The monitor contrast control must be set
to midrarige.)
5 ,. 400 LINE GRAPHICS, 4 BIT PLANES, FULL
LUT: This option verifies the proper performance of several
screen capabilities. Several lines containing self-explanatory
messages are displayed on the screen, each testing a different
feature.
6 • REDUCED LUT TEST (LITTLEBIT): Three self­
explanatory messages are displayed for this test.
Approval of the question asked on the screen redisplays the main
screen options. Selection "0" then summarizes the results on the
screen in a set of messages.
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