User Manual

Publication 20B-IN22B-EN-P — December 2009 13

Chapter

Component Replacement Procedures

Read and follow the Safety Precautions on page 6 and Important Initial

Steps on page 8 for all these instructions.

Refer to the figures in Component Diagrams on page 9

as needed for these

instructions.

Remove Main Control Panel

Assembly

Perform this procedure only when instructed for the component you are

replacing.

1. Remove safety shields as needed.

2. Remove the ribbon cable going from the Main Control Board (J2)

to the Power Interface Board (J1).

3. Remove the two screws and washers on the Main Control Panel

below TB11.

4. For Frames 9 and 10: Remove the two screws on the left side of the

Main Control Panel assembly.

These screws are larger than those below TB11. Do not mix the two

sets.

5. For Frame 7 only: Verify that all wiring to lower side of TB11 is

properly labeled and then disconnect wiring from TB11.

6. Remove the two nuts at the top of the Main Control Panel.

7. Remove Main Control Panel; support.

8. Disconnect wire harnesses from TB11 to the Switch Mode Power

Supply Board (J4 connector) and at TB1 and TB2 on the Power

Interface Board.

9. Label and disconnect all customer wiring from TB11.

10. Carefully set the Main Control Panel aside.

CAUTION

HOT SURFACES

Nuts