Digital Equipment VAXstation 3100 Maintenance Manual page 183

162 Expansion Boxes
3. Disconnect the data cable
(J3),
the TK.50 tape drive 1/0 cable
(Jl)
and the
power cable (Pl) from the TZK50 controller board (Figure 6-24).
DATA CABLI!
MA·XDHO·H
Figure 6-24 TZK50 Controller Board Cables
4. If the TK50Z expansion box contains the SCSI ID switch board. disconnect
the switch board cable from the jumper pins on the T'ZK50 controller
board.
!'!. Remove the TZKSO controller board from the shield.
6. If
you are removing the tape drive or the power supply, return to that
procedure now. Otherwise, proceed to the next Step.
7. If the TK50Z expansion box does not have the SCSI ID switch board
installed, set the jumpers on the new TZK50 controller board in the same
position as they are on the old TZK.50 controller board you just removed
(Figure 6-25). If the old board does not have the three resistor packs
installed (Z7, Z6, and ZS), remove them from the new board. Figure 6-25
shows the TZK50 controller board configured for ID address 5 with parity
checking enabled and internal diagnostics disabled.
8. Replace the 1ZK50 controller board by reversing the previous procedure.