Digital Equipment VAXstation 3100 Maintenance Manual page 172

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Expansion Boxes 151
When running the system exerciser in Field Service mode, the code for the
RRD40 compact disc expansion box shows that it is removable, but not
writable and that no errors are present (4100.0001 for SCSI ID of 4, 0100.0001
for SCSI ID of 0, and 1100.0001 for SCSI ID of 1). Any error code other
than those previously listed indicates an error is most likely on the RRD40
box, but never rule out the possibility of an error on the SCSI bus controller
itself.
If the tests indicate an error on the RRD40 compact disc expansion box,
perform the following steps:
1. Make sure the expansion box has power and is switched on.
2. Make sure the SCSI cable connects properly to the external SCSI port, or
to the previous expansion box, and to the back of the RRD40 expansion
box.
3. Make sure the SCSI terminator installs on the unused connector on the
back of the box or that the cable secures the next daisy-chained box.
4. Run the tests again.
5.
If
the problem returns, disconnect the RRD40 expansion box from the
daisy chain or from the SCSI port if no other boxes are connected. Install
the SCSI terminator on the external SCSI port, and make sure the last
expansion box properly terminates. Run self-test (TEST 6).
6. If the status code is not FFFFFF05 for the address ID of the RRD40
expansion box (normally address ID 4), check the SCSI address IDs of all
drives on the bus for proper settings. If the address IDs are set correctly,
replace the MSC module.
7. If the status code is FFFFFF05, check the address ID switch on the back
of the RRD40 expansion box to make sure it is set properly. Refer to
Figure ~ 17 for proper SCSI ID switch settings.
8.
If
the address ID is set properly, fault in the RRD40 expansion box
or the SCSI cabling exists. Check the cabling for proper connections,
terminations, and damaged pins.
If
the cabling is good, replace the RRD40
expansion box .
9. If a problem still exists, replace the MSC module in the system box.