Self Test Result - Failures
When failures have been detected during the Self Test,
the test result shows on the Main Panel Display. How-
ever, normal operation cannot be started and pressing
ENTER on the keypad has no effect. Record the test re-
sult, as it provides important service information.
In the case of failures, where one or more bad circuit
boards have been found, only two keys are active on the
front panel of the console, REJECT and S1. If you press
REJECT, the Self Test Routine restarts in the same manner
as if main power was switched off and then on. (An excep-
tion to this is the POWER and TIMER indicators. If these
LEDs were lit before recycling the self test, then retesting
can occur only if main power is switched on and off.)
It is possible that no failures will occur when the Self
Test Routine is rerun, but a failure on the first run indi-
cates a possible marginal condition which you should re-
port.
Pressing the S1 key will activate the Diagnostic Monitor
which is used to further investigate the cause of any fail-
ures detected during the self test. This mode should be
used only by qualified maintenance personnel.
Self Test Result Display
The four-digit test result, displayed at the end of the Self
Test Routine, is designed to show the three possible con-
ditions of the one main and two optional circuit boards
in the control console (refer to Table 4-5). These condi-
tions are 1) Good, 2) Bad or, in the case of options, 3)
Not Used. This application of the Main Panel Display is
done by addressing each segment of the LCD figures.
Function of
Controls
Self Test Routine
4-25
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