500300 Rev. U
Menu Operations
4-23
1.
Apply power to the tape drive.
2.
The power up diagnostics will display a checksum error message on the front
panel display for each EPROM that was changed. Press any switch each time
this occurs to continue the diagnostics. When the diagnostics are complete, the
display will indicate
STANDBY
.
3.
Press the MENU switch once. The MENU indicator will illuminate and the
display will indicate
RESET HEAD CLEAN
.
4.
Display the checksums as follows:
a.
Press the or switch until the display indicates
MAINTENANCE
.
b.
Press the ENTER switch once.
DEFAULT CONFIG
. is displayed.
c.
Press the or switch until the display indicates
DISPLAY FIRMWARE
.
d.
Press the ENTER switch once. The drive model number will be displayed.
e.
Press the or switch until the display reads
EXECUTIVE CPU
on the top
line and indicates a four-digit hexadecimal number on the bottom line. This
number is the newly calculated checksum for the WREX EPROM, and should
match the checksum written on the EPROM label (recorded before
installation).
f.
In the same manner, the checksums of the Write DSP, Read DSP (341X only),
Motion CPU and SCSI CPU can be read. The displayed checksums should
match those recorded on the EPROM labels.
5.
After the correct checksums have been verified, press the EXIT switch until
the display indicates
DISPLAY FIRMWARE
.
6.
Update the non-volatile RAM with the new checksums as follows:
a.
Press the or switch until
SERVICE
is displayed.
b.
Press the Enter switch once.
PROM CHANGE
will be displayed.
c.
Press the ENTER switch again. The bottom line of the display will then
indicate
ENTER TO RESET
.
d.
Press the ENTER switch once. The tape drive will record the new checksums,
store them in the WREX microprocessor, and display
DONE
when the process
is complete.
7.
Press the EXIT switch until the MENU indicator goes out and the display
indicates
STANDBY
. The tape drive is now ready for normal operation.
4.5.9.3
Board Change Function
The
BOARD CHANGE
function does everything the PROM Changed function does, plus
the following: