High Order (HO) Shim Supply Replacement

Prerequisites

Table 1. Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
1	Not Applicable	30 minutes	20 minutes

Table 2. Tools and test equipment
Item	Quantity	Effectivity	Part number	Manufacturer
Screwdriver	1	-	-	-
Non-Ferrous Tool Kit	2	-	-	-

Table 3. 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

Prepare for the shutdown of equipment. Notify affected personnel working in the area that LOTO is being performed.
To turn power off, press the power switch at the back of the HO Shim Supply
Remove the power cord from the plug it is plugged into
Using DMM, measure voltage at plug to ensure no power present
Lock out the power plug.

Note:
The HO Shim Supply (NAV version) is light enough to replace without the use of the Hoist Kit Figure 2.

Loosen the 16 thumbs screws securing the penetration panel to the magnet room wall Figure 1. This will allow access to the rear of the Shim Supply.

Figure 1. Removing the Penetration Panel
Remove all cables that attach to the back of the supply Figure 2.

Figure 2. HO Shim Supply Replacement (Front View)

Figure 3. HO Shim Supply Replacement (Rear View)
Remove 4 screws that attach the shim supply to the cabinet
Carefully slide out and remove the shim supply.

Note:
Fiber Optic cables are present in front of Shim Supply. You can remove Shim Supply without removing cables, but should be careful about not breaking the Fiber Optic cables.
Install the new supply and secure with 4 screws
Attach all cables/connectors removed in Step 2.
Attach Pen Panel removed in Step 1
Proceed to Step 1.

Remove LOTO from power cable to shim supply.
Plug in shim supply power cable and turn on power switch at back of supply
Reset TPS
If NAV supply is used, proceed to HO Shim Supply Functional Checks and run shim coil continuity check.
Run Goodbye Scan to make sure system is ok. Check this document for details.