Octel XC1000, Service Manual

Page: 363 / 889

REPAIR AND REPLACEMENT
8-56 Edition One XC1000 Service
1. Use the procedure in section 8.2 to take the XC1000 out of service.
2. Turn off power to the XC1000 by switching the main-power circuit
breaker to the OFF position ( 0 ).
3. Open the doors at the rear of cabinet 1 and locate the distribution
board, as shown in Figure 8-29.
DISTRIBUTION
BOARD
Figure 8-29. Location of Distribution Board
in Cabinet 1.
4. Label all cables by jack or pin number, then disconnect them.
5. Note and record the positions of the dip switches at SW1 and SW2.
Figure 8-30 shows the location of the dip switches on the distribution
board.
6. Using a 3/16-inch hex wrench, loosen the clamp-securing screw, then
remove the four cable clamps located above the distribution board, as
shown in Figure 8-31.
7. Remove the 17 Phillips screws and washers that secure the distribu-
tion board its mounting standoffs on the cabinet (Figure 8-31). Retain
the screws and washers for later use.
8. Remove the distribution board.
9. Place the replacement distribution board in its correct position, with
the screw holes in the distribution board aligned with the holes in the
standoffs.
10. Replace the 17 Phillips screws and washers to secure the distribution
board to the mounting standoffs on the cabinet.
11. Replace the four cable clamps above the distribution board
(Figure 8-31).
12. Using a 3/16-inch hex wrench, tighten the clamp-securing screws.
13. Set the dip switches at SW1 and SW2 to the settings recorded in step
5, above.
SECTION 8.7