Digital Equipment VAXstation 3100 Maintenance Manual page 177

156 Expansion Boxes
7. H the status code is FFFFFF05, check the SCSI address ID switch settings
on the back of the TK50Z expansion box to make sure they are set
properly. Refer to Figure 6-20 for proper SCSI switch settings. H the
TKSOZ expansion box does not have the SCSI ID switch on the back of
the box (TK50Z-FA), take off the cover of the box and check the jumper
settings on the
TZKSO
controller board (Figure 6-21).
8. H the SCSI address ID is set properly, a fault in the TK50Z expansion box
exists. Troubleshoot the
TK50Z
expansion box using the box's internal
self-test described in Section 6.3.1.1.
MA-X11H· H
Figure 6-20 TK50Z·GA SCSI Address ID Switch Settings
6.3.1.1 Troubleshooting Inside the TK50Z Expansion Box
The TK.50 tape drive and the TZK50 controller board perform an internal
self-test every iime the iape expansion box is powered up. To do an in-depth
self-test on the TK.50 tape drive and the TZK50 controller board, perform
the following procedure. Do each step indicated until you find and fix the
problem. H you need to determine the revision level of the ROMs on the
TZK.50 controller board or on the tape drive in the expansion box, refer to
Section 3.1.6.
1. Remove the TK50Z expansion box cover.