Disconnect Dc Power Harness From Front Of Chassis; If Necessary Remove Key Plug From Expansion Backplane - Digital Equipment VT18X Upgrade And System Test Manual

VT 18X UPGRADE KIT INSTALLATION
DISCONNECT DC POWER HARNESS FROM FRONT OF CHASSIS
Remove the 22-pin connector (Figure 2-9) from the front, right chassis by releasing the two retain-
ing rings from its edge with needlenose pliers, or lift the clips off the top and bottom of the con-
nector and discard. .
CHASSIS
CARD
CAGE
l8-PIN
CONNECTOR
22-PIN
CONNECTOR
(P1)
MR 7875
Figure 2-9 Disconnecting DC Power Harness
IF NECESSARY REMOVE KEY PLUG FROM EXPANSION BACKPLANE
The expansion backplane, shipped with the VT18X, has a key plug in connector J6 on the back-
plane (Figure 2-10). This key plug is for the new VT100 terminal controller module (54-13009-03),
which has a slot in its connector J6 between pins 5 and 6.
When installing the VT18X, inspect your terminal controller board for a notch in connector J6 (Fig-
ure 2-5). If the notch is not present, you will have to remove the key plug from J6 of the expansion
backplane to insert the module into the backplane. Use needlenose pliers to pull the key plug out
of the connector on the backplane.
REMOVE
KEY PLUG
Figure 2-10 Remove Key Plug from Expansion Backplane
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