13. Disconnect the cable (17-01568-02) to the XTC power sequencer from
J1 at the lower left corner of the card cage. See
13
in Figure 2–3.
14. Disconnect four wires from the bus bars that go to the system control
assembly: +5V (red); +12V (orange); and two ground connections (brown
and black). Use an 11/32 inch nutdriver. See
14
.
15. Disconnect the ground strap (17-01662-01) from the chassis. Remove
the screw from the bus bar with a large Phillips screwdriver. See
15
.
16. Disconnect the red and black fail safe enable cable (17-01833-01)
connections to the +5V bus bar and to ground. See
16
.
17. Working from the front of the cabinet, disconnect the red and black
portion of the fail safe enable cable from J7 of the H405 and the orange
and blue portion from J6. If the system does not have a battery backup
unit (BBU), the orange and blue portion will have been left unconnected.
If the system does have a BBU, disconnect the orange and blue portion
of the fail safe enable cable (17-01833-01) from J20 on the BBU (see
Figure 2-17) and set the complete cable aside to be discarded.
18. Working from the rear of the cabinet, disconnect the power control/
status cable (17-01497-02) from the regulators at the interlock and J2
on the H7215 and at J1 on the two H7214s. See Figure 2–4.
XMI-1 to XMI-2 Conversion
2–7
