Resident Test Program Overview
The Series 4400 control consoles contain a Resident
Test Program which is a feature designed to provide sup-
port for several levels of automatic testing of the con-
sole. This test program includes a Self Test Routine, a
Cyclic Self Test and a Diagnostic Monitor.
Note:
The Self Test Routine is a basic test intended
to inform you of the operational status of the
system console, and is fully described in
Chapter 5. The Cyclic Self Test and Diagnostic
Monitor are intended for use by qualified main-
tenance personnel as troubleshooting aids, so
this section provides only a brief description of
these features.
The Self Test Routine is performed automatically when
main power is applied to the system. Its purpose is to
provide you with an initial survey of the operating condi-
tion of the console. It tests the console hardware and pre-
vents the startup of normal operation if there are failures
on the basic circuit board in the console.
When main power is applied to the Series 4400 system,
all lamps (LEDs) on the front panel of the console light
and all displays (LCDs) show a number. This action
lasts several seconds and allows you to make a visual
check of these functions. After the first part of this test,
the Main Panel Display shows a coded number which in-
dicates the operational status of the major functional sec-
tions of the console. The coded number also indicates
whether an option is installed or not.
Resident Test Program Overview M10-94400-1
4-20
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