Replacement of PAC

Prerequisites

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

Table 2. Safety

DANGER

ELECTROCUTION HAZARD!

DANGEROUS VOLTAGES ARE PRESENT AROUND THE MAGNET ENCLOSURE AND REAR PEDESTAL ELECTRONICS.

Table 3. Required conditions
Condition	Reference	Effectivity
System Power must be turned OFF. Refer to Lockout / Tagout for System Cabinet PDU Main Breaker.	-	-

The PAC is located under the right side of the magnet enclosure.

Remove right middle side cover and right side covers.
- Side Middle Cover (Right side Only)
- Side Covers (Right side Only)
Remove bottom bar from Magnet right side.

Figure 2. Removing bottom bar
Cut the tie-wraps fixing cables.
Remove Four Bolts/Nuts/Washer that fixes the PAC/SRI Tray and slide the PAC/SRI Tray out.

Figure 3. Slide PAC/SRI Tray
Disconnect the all cables attached to the PAC. Note down the cable sequence.
Remove 2 screws holding PAC to tray.
Remove the PAC with bottom fixture.

Figure 4. PAC Removal
Remove four screws and remove PAC Assy from Base Mount.

Figure 5. Remove PAC Assy from Base Mount.

Remove right middle side cover and right side covers.
- Side Middle Cover (Right side Only)
- Side Covers (Right side Only)
Remove bottom bar from Magnet right side. See Figure 2.
Cut the tie-wraps fixing cables.
Remove 4 screws securing right bottom bracket to magnet foot.

Figure 6. Screws Securing Right Bottom Bracket
Remove 2 screws securing PAC/SRI Tray to right bottom bracket.

Figure 7. Screws Securing PAC/SRI Tray
Disconnect the all cables attached to the PAC. Note down the cable sequence.
Remove 2 screws holding PAC to tray. See Figure 4.
Remove the PAC with bottom fixture.
Remove four screws and remove PAC Assy from Base Mount. See Figure 5.