• SIGNA™ Hero 3.0T Service Methods
  • 5852800-8EN Revision 1.0
  • Object ID: 00000018WIA30C4A230GYZ
  • Topic ID: id_15667499 Version: 1.3
  • Date: Jul 13, 2021 4:27:36 PM

Wiring Modification of Control Box and TCU Replacement

Prerequisites

Table 1. Personnel requirements
Required personsPreliminary requirementsProcedureFinalization
1Not Applicable30 minutesNot Applicable
Table 2. Tools and test equipment
ItemQuantityEffectivityPart numberManufacturer
Standard Tool1---
TORX driver1---
Plastic Tape (0.75 inch (19mm) or so)1---
Equipment for LOTO1---
PPE1---
DVM1---
Table 3. Safety

Procedure

  1. Open ICC Cover and remove it by removing the lock at the upper hinge location.
    Figure 1. Remove ICC Cover
  2. Remove LOTO for ISC with the original TCUs are installed in ICC.
  3. Prepare DVM and wrap the plastic tape on the red probe lead insulating all metal except for the very tip.
    Note:

    This is for avoiding a short when measuring at a pin of D-Sub connector.

    Figure 2. Wrapping tape on the lead
  4. Turn OFF the following sub breakers at ISC PDU.
    1. RF Amp OFF.
    2. Gradient OFF.
    Figure 3. Turn OFF sub breakers
  5. While ISC power is on, perform the following functional check.
    1. Power off 3Q1(CCU Switch) and 3Q2(GCU Switch).
    2. Disconnect 1X11 cable (CCU control cable) and 2X11 cable (GCU control cable).
    3. Power on 3Q1(CCU Switch) and 3Q2(GCU Switch).
      Figure 4. Functional Check
    4. Measure the DC voltage for Pin 17 on cable 1X11 and ground (See illustration below), and write down the value in the table below. (It should be 15.0 VDC ~ 24.0 VDC) (←Case1 (Normal case))
      Note:

      If there is no voltage at Pin 17(this is very rare case), check the voltage at Pin18 and write down the voltage in table below with comment for Pin 18. In this case, wiring modification will be different from normal case. (←Case2 (rare case))

      Cable 1X11 Pin 17 Voltage (V)Comment
      Figure 5. DV voltage for Pin 17 on cable 1X11
    5. Measure the DC voltage for Pin 18 on cable 2X11 and ground, and write down the value in the table below. (It should be 15.0 VDC ~ 24.0 VDC) (←Case1 (Normal Case))
      Note:

      If there is no voltage at Pin 18(this is very rare case), check the voltage at Pin19 and write down the voltage in table below with comment for Pin 19. In this case, wiring modification will be different from normal case. (←Case2 (Rare case))

      Cable 2X11 Pin 18 Voltage (V)Comment
      Figure 6. DC voltage for Pin 18 on cable 2X11
  6. Perform LOTO at ISC.
    Note:

    It is not necessary to restore two cables since all cables at control box will be removed in next step.

    Note:

    Shutdown the host PC before turn off the main breaker.

  7. Confirm that there is no voltage at the J1 terminal of control box.
    Figure 7. J1 terminal at Control Box
  8. Disconnect all cables from Control Unit. See illustration below.
    Figure 8. Cables at Control Box
  9. Loosen two screws and carefully withdraw Control Unit from the chassis.
    Figure 9. Withdraw Control Unit
  10. Remove side cover of control box by loosening screws per the following Illustration.
    Figure 10. Remove side cover of control box
  11. For the Case1 (normal case) in step 5.d and step 5.e, change the wiring for both TCU terminals per following steps.
    1. Move a cable from X1:2 to X1:1.
    2. Move a cable from X1:3 to X1:2.
      Figure 11. Wiring modification for Case1 (Normal case)
      Note:

      For Case2 (Rare Case) in step 5.d and step5.e, move a cable from X1:3 to X1:1 only (c).

      Figure 12. Wiring modification for Case2 (rare case)

    How to disconnect and connect the cable: Use the small flathead screw driver and do as follows.

    Figure 13. How to disconnect and connect the cable
  12. Replace TCU as follows.

    • CCU TCU: 5723568 -> 5723568-3 (Part number can be identified by package of this Assy.)

    • GCU TCU: 5723568-2 -> 5723568-4 (Part number can be identified by package of this Assy.)

    When removing the TCU, push both top and bottom of TCU grip and pull out.

    When inserting the TCU, make sure that the latches (below knurled area) snap into place.

    Figure 14. Remove TCU
  13. Restore the side cover of Control Box.
  14. Slide in the Control Box in ICC and secure it with two screws.
    Note:

    Pull up the J1 power cables when sliding in the control box so they don’t interfere with the Control Box slide movement.

  15. Restore all cables to Control Box.
  16. Write down the following information on the small piece of paper and attach on Control box as shown below. [5491925-3 Equivalent]
    Figure 15. Label
  17. Remove LOTO at ISC.
  18. Confirm that TCU indicator “5” is shown(lit) and pressure meter indicates proper value for CCU and GCU.
    Figure 16. Operation check
  19. Restore the following sub breaker at ISC PDU.
    1. Gradient
    2. RF Amp

Finalization

No finalization steps.