Installation Instructions

DMI (Digital Module Internal) Assembly Chapter 8: DMI R eplacement Procedures
Procedure 8 -2 R eplacing the DMI (Continued)
1 1
P ower down the failed DMI by setting the corresponding PDU DMI 20A circuit breaker to
the off position (pulled out).
Mak e sure the PDU DMI circuit break er is set to OFF .
Y ou will be disconnecting multiple cables from connectors. If necessary , use
masking tape and a marker and temporarily tag each cable as to the proper
connector before disconnection.
12
ESD handling precautions must be adhered to during this procedure. W ear a
conductiv e, high impedance wrist str ap .
Plug the end of the ESD wrist strap into the UBS Macro BTS frame ESD jack This jack is
located in the middle of the upper XMI shelf bracket. A ttach the wrist strap to your wrist.
13
Disconnect all of the cables connected to the front panel connectors on the failed DMI.
14
Turn the retaining fastener , located in the upper right corner of the failed DMI front panel,
CCW (Counter Clockwise) until resistance is felt. This indicates that the retaining fastener
is disengaged.
15
Grasp the failed DMI by the handle with one hand and pull outward. While supporting the
bottom of the DMI assembly with the other hand, slide the failed DMI assembly completely
out of its housing.
16
ESD handling precautions must be adhered to when handling the DMI assembly .
Set the failed DMI assembly onto a clean, ESD protected surface.
17
Remove the replacement DMI assembly from its packaging.
Continued
8 -16 68P09283A64 -3
FOA SEP 2007