GP4 Replacement

Prerequisites

Table 1. Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
1	Not Applicable	30 minutes	35 minutes

Table 2. Tools and test equipment
Item	Quantity	Effectivity	Part number	Manufacturer
Standard Tool	1	-	-	-

Table 3. Replacement parts
Item	Quantity	Effectivity	Part number	Manufacturer
GP4	1	-	6237000 6237000-3 6237000-3 requires SW Revision PX26.1_R02_1833.a with Service Pack 1 or later.	-

Table 4. Safety

Warning

ELECTROCUTION HAZARD!

DANGEROUS AND OR FATAL VOLTAGES ARE PRESENT IN THE ENERGIZED CABINET.

Follow LOTO steps as given in first section of this document to disable and verify safe voltage levels.

Table 5. Required conditions
Condition	Reference	Effectivity
System Power must be turned OFF. Refer to LOTO for ISC.	-	-

Loosen fixing screws and remove ISC PW Cover by lifting up a little.

Note: If furnished closet door prevents from removing, the PW cover can be separated in two pieces by removing 6 screws at center.

Figure 1. ISC PW Cover
Remove Gradient Cable Cover per following steps.
1. Loosen 12 screws.
2. Lift up a little and remove the Gradient Cable Cover.
Figure 2. Gradient Cable Cover
Perform the following steps.
1. Remove the access cover by loosening 20 screws.
2. Disconnect all connectors from GP4.
Figure 3. GP4 Cable
Perform the following steps.
1. Disconnect Power cable connector.
2. Remove 4 screws and slide out the tray.
Figure 4. GP4 Removal
Restore GP4 by reverse order of removal.

Notice

When restoring access cover, lift up the cover and fix screws firmly to avoid noise.

Restoring access cover

Restore ISC by reverse order of removal.

Note: Download time can be up to 15 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 the system will display “Please wait while TPS performs an extended download and reset”. Please be patient.
Restore the Power. Refer to Removing LOTO - ISC.
To adjust DC Offsets, refer to DC Offset Adjustment .
Perform [TPS Reset].
Perform DQA Tool.
Perform check scan.