Owner`s manual

DRAFT
The large yellow LED at the bottom of the KA66A LEDs lights when
the KA66A modules pass on-board power-up tests (each CPU module is
tested individually, followed by CPU/memory interaction tests and CPU
multiprocessing tests.)
Self-test also checks DWMBB/A modules, if any. If a DWMBB/A module
passes self-test, its yellow light and the KA66A yellow light are on.
In either of the above two cases, the red lights of the KA66A are set as
shown in the left-hand part of Figure B–1. The bottom red light of the
KA66A is off if the KA66A is the boot processor, and on if it is a secondary
processor.
If a DWMBB/A module fails self-test, its yellow light is off and the KA66A
yellow light is on. The red lights of the KA66A indicate the error number
of the failing test.
If self-test fails for the KA66As or DWMBB/As, the eight red LEDs contain
an error code that corresponds to the number of the failing test. The test
number is represented in binary-coded decimal, with the most significant
bit at the top. A bit is ONE if the light is ON.
For example, assume a processor fails self-test (yellow LED is OFF) and
shows the following pattern in the eight red LEDs:
TOP
(MSB) off 0
off 0 = 3
on 1
on 1
off 0
off 0
on 1 = 2
(LSB) off 0
BOTTOM
The failing test number decodes to 0011 0010 (binary-coded decimal 32).
Section B.2 gives more detail on the failing tests indicated by the KA66A
red leds.
Description of KA66A LEDs B–3