Remove and Install the AC Precharge Control Circuit Board for Frames 8...15

Replace the AC precharge control circuit board with kit catalog numbers 20-750-MACPC1-CD and 20-750-MACPC1-EF. Follow these steps to remove and install the AC precharge control circuit board.
  1. Review the product advisories in Before You Begin.
  2. Remove power from the system.
  3. Open the enclosure door.
  5. IMPORTANT: The minimum inside bend radius for fiber-optic cable is 50 mm (2 in.). Any bends with a shorter inside radius can permanently damage the fiber-optic cable. Signal attenuation increases as inside bend radius is decreased.
    fiber-optic cable bend radius example
  6. Without bending the cable to a radius less than 50 mm (2 in.), remove the fiber-optic cable from the transceiver in the ACP port on the AC precharge control circuit board.
  7. Open the transceiver latch and pull the transceiver out of the connector on the board. You can retain the transceiver as a spare part.
    TIP: If the latch is obstructed and you cannot use your fingers to open it, use a small, screwdriver or other long, narrow tool to open the latch.
    example of how to remove the fiber transceiver from a fiber-optic port
  8. Cut and remove the tie wraps that secure the wire harnesses that is connected to the AC precharge control circuit board.
  9. Loosen the two 5 x 12 mm slotted-Torx screws that secure the circuit board panel to the AC precharge module chassis or enclosure side sheet and slide the panel out of the chassis as far as possible.
    example of how to remove the frame 8…15 AC precharge circuit board assembly
  10. Disconnect these wire harness connectors from the connectors on the AC precharge circuit board:
    • P1 from J1
    • P2 from J2
    • P3 from J3
    • P4 from J4
    • P5 from J5
    • P6 from J6
    • P7 from J7
    • P11 from J11
    • P12 from J12, if present
  11. example of the AC precharge circuit board connections layout
  12. Record the position of the PE-A jumper on the circuit board. The PE-A jumper on the new AC precharge control circuit board must be installed in the same position.
    example of the AC precharge circuit board PE-A jumper positions
  13. Item
    Description
    A
    PE-A jumper in the "IN" position
    B
    PE-A jumper in the "OUT" position
  14. Remove the bracket and board by sliding the bracket out of the drive.
  15. Install the AC precharge control circuit board in the reverse order of removal.
  16. TIP: This illustration represents a fiber-optic transceiver port on an example circuit board only.
  17. Remove the protective cover from the ACP port on the new AC precharge circuit board.
    example of how to remove the cover from the fiber-optic transceiver port with XT protection
  18. Remove the new transceiver supplied with the kit from the packing materials.
  19. IMPORTANT: The end of the transceiver that connects to the inside of the fiber port contains dielectric grease. Do not touch the end of the transceiver.
  20. Remove the protective covers from the transceiver.
    example of how to remove the covers from the ends of a fiber-optic transceiver with XT protection
  21. Without bending the cable to a radius less than 50 mm (2 in.), fully insert the fiber-optic cable into the transceiver.
    example of how to insert a fiber-optic cable into a transceiver
  22. Insert the transceiver and fiber-optic cable into the port on the board, until you hear an audible ‘click.’
    example of how to insert a fiber-optic cable into a fiber-optic transceiver port
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