Digital Equipment VAXstation 3100 Maintenance Manual page 179

158 Expansion Boxes
Address ID on
TZK!O Controller Module Switch Settlnp
SCSI Bus Pl P2 P3 P4
P!
0 In
In In In Out
1 In In Out In Out
2 In Out In In Out
3
In Out Out In Out
4 Out In
In
In Out
52
Out In Out In Out
61 Out Out In In
Out
1 Out Out
Out In Out
1
Reserved address ID for SCSI bus controller
2 Recommended address ID
for the TZK50 controller module
4. If the TK50Z expansion box does not have the SCSI ID switch board
installed, check the three resistor network packs (Z7, Z6, and Z5) to make
sure they are installed properly. The TK50Z expansion box must
be
the
last
box
connected to the daisy chain on
the
external SCSI port. Any
P."l'nlln. < :inn hnwP.S r.onnP.CtP.<l to thP.
1faisv
chain after
the
TK50Z exoru . ion
- --c- · - - --- -- - -· ·- -----· ·- - .,, . ..
box are not accessible unless the resistor network packs are removed.
5. Plug in the power cord and switch on power to the expansion box.
6. if the LED on the TZK50 conirulier buitrd and on ihe T'".i{.50 iape drive do
not light when power is first turned on or the fan does not tum, replace
the power supply.
7. Watch the red light on the TK50 tape drive. It should shut off after 5 to 6
seconds after power-up if no tape is installed. If it starts flashing, replace
the TK50
tape
drive. If a tape is installed, the red light stays on.
8. Look at the LED on the TZK50 controller board. It turns on at power-up
for 2 seconds, then turns off. It must stay off once it turns off. If it does
not stay off, replace the TZK50 controller board.
9. Insert and load a blank CompacTape cartridge into the tape drive. Do not
use a tape cartridge that contains good data, because the next few steps
will erase the data.
10. Switch off power to the expansion box.