Issue 1,
1986
T a b l e 5 . 0 2
LED Display Values for Loading Errors
HEX
CCDE
DETECTED
0
2
3
4
5
6
D
E
F
9
A
Start of self test not halted
Main processor error
EPROM checksum
MEM slot 0 low 64k test error
8k by 8 static RAM test error
memory test error
memory test error
SIB side error
Global memory
Watchdog iimer error
SIB serial
test error
SIB counter timing test error
Start boot process (self test done)
Disk
error
Drive not ready error
CRC retry
exceed 8
LED
OFF
OFF
OFF
OFF
OFF
OFF
ON
O N
ON
ON
ON
ON
ON
ON
Notes:
S T 1
LED
OFF
OFF
OFF
OFF
ON
ON
ON
O N
ON
OFF
OFF
OFF
S T 2
LED
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
ON
OFF
ON
ON
S T 3
LED
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
ACTION
N o t e 1
N o t e 1
Notes
1 and 3
N o i e 1
N o t e 1
N o t e 1
N o t e 1
1 and 3
N o t e 1
N o t e 1
N o t e 1
N o t e ‘ 1
Note 2
Note 2
1 .
Upon failure, retry loading procedure. If failure persists, replace
PC3.
2 .
Upon failure, retry loading procedure using another set of floppy disks. If failure persists,
disk drives
and then
PCB, if necessary.
3 .
If reload and
PCB replacement (Noie 1) is not effective, replace memory
starting from
0 until failure
is no longer present.
Figure 5.01
Unit (Front