Power-On Self-Test - Bering 3000 Series User Manual

2.4 Power-On Self-Test
2-11
GmING READY
During the power-on process, built-in intelligence in the disk
subsystem automatically tests all modules. Result of self-test is shown
by means of LED's(Light Emitting Diodes). In addition, a two-digit
display is available to subsystem equiped with Opt. 401.
(See
Appendix F
for dispaly code.)
The LED on the lower left corner of the front bezel is a indicator
for power-on,self-test result, and disk access. It is referred to as
the MAIN LED in this manual.
If the MAIN LED remains steadily lit beyond half a minute after
power-on, the disk subsystem has successfully passed the self-test.
If the power-on self-test fails, the MAIN LED indicates a
malfunction as follows:
1. If the MAIN LED remains off after power-on, the Controller PCB
may have failed.
2.
If
the MAIN LED blinks* relatively fast (about 5 times per
second), the Winchester drive may have failed. The LED continues
to blink until the disk subsystem is powered down.
3. If the MAIN LED blinks* relatively slow (1 time per second), the
floppy drive may have failed. The LED continues to blink until
the disk subsystem is turned off.
In addition, there are three LEOs at the back panel providing more
status information. These are visible through the "STATUS" opening.
Red : ERR LED
Yell ow: RUN LED
Green : DeOK LED
(Lit when error encountered).
(Lit when controller is OK).
(Lit when power supply is OK).
* The MAIN LED also blinks momentarily during normal access to the
Winchester drive.