HP 9000 300 Series Service Training page 73

Configuration Switches and Jumpers:
When replacing drives make sure the configuration switches are set correctly. This information
can be found in the Configuration Chapter, #5 of the service manual and handbook.
Integrated CRT Assembly:
When replacing the CRT assembly on the Integrated controller, I stated to return the
assembly to SMO as one assembly. Wrong, this assembly is not on the exchange program. It
is a throwaway. But, SMa will send you the new one as one assembly.
Integrated Hard Drive Removal:
When replacing a hard drive in a Integrated Controller, the drive may be removed without
removing the front bezel. The top, side and bottom covers will still have to be removed. If
there is a customized engineering board in the center slot, you will not be able to remove the
hard drive from the top. But, if there isn't anything in the center slot, you should .be able to
remove the hard drive from the bottom slot.
Once the covers are removed, remove the four screws holding the drive to the chassis. Reach
behind the floppy drive if one is present and lift the drive until you can remove the power and
data cables.
Configuration Control Mode:
There is a way to set the Select Codes, Interrupt Levels, Parity and Bus Addresses on the
LAN, SCSI, HP-Parallel and HP-IB interfaces other than with hard switches or jumpers. The
B,oot ROM has a configuration routine that will set these codes, levels and addresses at boot
up, from the keyboard.
You can also set the Auto System Selection, which will allow you to set which operating
system you want booted each time the system is turned on.
All of the procedures to make these changes are in chapter 5 of the service manual or chapter
3 of the service handbook, under the Boot ROM Functions, Configuration Control Mode
section.
RS-232:
The Domain products use a 25 pin connector on their serial port. There are three RS-232
ports on the one connector. There is a cable that breaks out the one port to three. Only
having one port on the rear panel, saves panel space.
The Domain products were never in the multiuser market, so there was never any need to
have a remote console or terminal capability. On the other hand, HP Workstations have
historically had multiusers, consequently needing remote console support.
So, there needed to be remote console support as well as having three ports on the new
controllers. The lab solved this by having the first of the three ports being the same as the
M375 and the last two the same as the last two Domain ports.
A·2 Video Corrections and Additional Information