XFD Power Panel Assy

Prerequisites

Table 1. Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
1	Not Applicable	60 minutes	15 minutes

Table 2. Tools and test equipment
Item	Quantity	Effectivity	Part number	Manufacturer
Non Magnetic Tool Set	1	-	-	-
Digital volt meter (DVM)	1	-	-	-

Table 3. Replacement parts
Item	Quantity	Effectivity	Part number	Manufacturer
XFD Power Panel Assy (Refer to Illustrated Parts)	1	-	-	-

Table 4. Safety

DANGER

STRONG MAGNETIC FIELD!

FERROUS MATERIALS CAN BECOME DANGEROUS PROJECTILES IN THE PRESENCE OF THE MAGNETIC FIELD PRODUCED BY THE SIGNA MAGNET.

Do not Bring any ferromagnetic tools or equipment into the magnet room.

DANGER

FATAL ELECTRIC SHOCK HAZARD!!

THE GRADIENT Amplifiers ACT AS CONSTANT LOAD SOURCES, AND WILL SEND maximum CURRENT TO ANY LOAD including any human who get across the outputs.

TO PREVENT FATAL ELECTRIC SHOCK, 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
PDU must be turned OFF. Refer to Lockout / Tagout for MDP(Main Disconnect Panel) or Facility PDU.	-	-

CAUTION

Wait 30 minutes to discharge the charge of Super Capacitor inside of XFD-PS.

Wait for 30 minutes.

Go to Magnet Room.
Remove Cover for XFD Power Pannel Assy.

Figure 2. Cover for XFD Power Pannel Assy.
Check the voltage at each axis terminals (X, Y, Z) and confirm that there is no voltage. Refer to Figure 3 for voltage check point.

Note:
Normally, the voltage of upper terminal will be 0 V after 30 minutes.

For lower terminal, the voltage may exist in case of switch failure in XFD-PS and the charge of super capacitor cannot be discharged.

If voltage exists in lower terminal, please check that SW1 of XFD-PS is turned to discharge position.

If SW1 is at discharge position, waited for 30 minutes, and voltage still exists at lower terminal, consider to replace XFD-PS before replacing XFD Power Panel Assy.

Figure 3. Voltage Check
Remove defective XFD Power Pannel Assy.

Figure 4. Cabinet Interface Board Cables
Bring new XFD Power Pannel Assy and connect all the connectors to three XFAs and XFD-PS.
Tighten all screws XFD Power Pannel Assy.

Note:
Make sure to tighten each screw.
Restore Cover for XFD Power Pannel Assy.

Note:
To install cover, start screwing from the corner. Do not tighten until all screws are screwed in the screw holes. Finally tighten all screws.
Turn the SW1 to OPERATION on front of XFD-PS.
Restore Cabinet cover.