Technical information

Troubleshooting and Repair
115
Troubleshooting
Identifying Faults
The Bootstrap Sequence
Table 24: System Bootstrap Sequence
Normal Numeric
Display on Main
Controller Card
Error Display on Main
Controller Card
Sequence Notes
Test code appears
for each self test
The numeric display
briefly flashes EE followed
by the test code number.
Main Controller
self test
These tests are run out of the
EPROM on the main controller
card.
B0 - RSD access
B1 - disk access
(These codes are
displayed briefly as
the system accesses
the RSD drive, and
the disk drives.)
Any Bx codes other than
B0 or B1 indicate errors.
OR
If B1 and/or B0 are
displayed for several
minutes, an error
condition exists.
Get MCINIT
from disk or
RSD
It takes the main controller only a
few seconds to obtain the
MCINIT test from the RSD or
hard disk. It begins doing the
tests as soon as it gets them.
Check that the LEDs on the hard
drives and RSD drive are
flashing. If the LEDs are not
flashing at this stage, the mass
storage subsystem is faulty.
Test code appears
for each test
The numeric display
briefly flashes EE followed
by an error code.
Test MCINT
control section
Test results are displayed on the
maintenance terminal screen.
The main controller sends these
results to the maintenance
terminal at 9600 baud, 8N1.
Fast count Same as above. Load operating
software
The main controller is
transferring its operating system
from hard disk to RAM.
Sporadic Same as above. Initialize
operating
system (OSInit)
The main controller sends these
results to the maintenance
terminal at 9600 baud, 8N1.
Slow steady flashing Same as above. Normal
operation on
main controller
The main controller begins
communicating with the
maintenance terminal at the last
saved baud rate. The desktop
display appears, allowing you to
start a session. The flashing
numbers on the processor
indicate the number of messages
passing between it and the other
processors on the system.
Fast count on
subsystem
processor. High
message numbers
flashing on main
processor.
Same as above. Loading
subsystem
processors
The main controller transfers the
subsystem processor software
loads from the hard disk to the
subsystem processors
(Peripheral Switch Controller
cards, DSU cards, DNI line
cards, and attendant consoles).