• SIGNA MR355 / SIGNA MR360
  • Service Manual
  • 5856356-3EN Revision 5.0
  • Basic Service Documentation. Copyright General Electric Company.
  • Object ID: 00000018WIA30770030GYZ
  • Topic ID: id_13105833 Version: 1.3
  • Date: Jul 5, 2019 11:18:59 PM

GP4

Prerequisites

Table 1. Personnel requirements
Required personsPreliminary requirementsProcedureFinalization
1Not Applicable30 minutes35 minutes
Table 2. Tools and test equipment
ItemQuantityEffectivityPart numberManufacturer
Standard Tool1---
Table 3. Replacement parts
ItemQuantityEffectivityPart numberManufacturer
GP4 (Refer to Illustrated Parts)1---
Table 4. Safety
Table 5. Required conditions
ConditionReferenceEffectivity

System Power must be turned OFF. Refer to System Cabinet PDU Main Breaker LOTO Procedure.

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Procedure

  1. Remove L Upper Front Cover. Refer to SC Cover Removal.
  2. Remove the access cover by loosening screws from SC rear panel.
  3. Disconnect all connectors from rear panel of GP4. （From left side: J7, J8, J1, J10, J11, J12 and J13 connectors）
    Figure 1. GP4 Cable
  4. Remove 4 screws tightening GP4 to the chassis.
  5. Slide GP4 out from front side of the chassis.
    Figure 2. GP4 Removal
  6. Restore GP4 by reverse order of removal.
  7. Restore System cabinet.

Finalization

Note:

Download time can be up to 10 minutes on a replacement GP4 module. If the software loaded on the system does not match the firmware loaded on the GP4 Board received as a replacement, there will be a one-time lengthy download of current firmware to the GP4. During this download there will be a windows on host screen to remind users an extended downloading is on going. Please be patient.

  1. Restore the Power. Refer to System Cabinet PDU Main Breaker LOTO Procedure.
  2. To adjust DC Offsets, refer to DC Offset Adjustment .
  3. Perform [TPS Reset].
  4. Perform DQA Tool.