Digital Equipment DEC 3000 Series Service Information page 255

LED Codes,
Continued
LED
Code Test Description
fb Memory configuration
completed.
fa Memory test with
non-bcache bit SET, dcache
OFF, and mchk enabled
f9 Memory test with
non-bcache bit CLEAR,
dcache OFF, and mchk
enabled.
f8 Memory test with
non-bcache bit SET, dcache
ON, and mchk enabled.
f7 Memory test with
non-bcache bit CLEAR,
dcache ON, and mchk
enabled.
f6 tc register test and
initialization
f5 Coreio register test and
initialization
f4 Look for CXT ROM
manufacturing data
f3 Completed load of CXT ROM
into memory.
Reason for Failure
Should never stop here.
If read .NE. write, send
error dump to SROM
port and branch to SROM
miniconsole.
If read .NE. write, send
error dump to SROM
port and branch to SROM
miniconsole.
If read .NE. write, send
error dump to SROM
port and branch to SROM
miniconsole.
If read .NE. write, send
error dump to SROM
port and branch to SROM
miniconsole.
Should never stop here. If
read .NE. write, send error
dump to SROM port.
Should never stop here. If
read .NE. write, send error
dump to SROM port.
Read of CXT ROM
manufacturing data did
not return data expected.
Send error dump to SROM
port and branch to SROM
miniconsole.
Should never stop here.
Continued on next page
C–3