DD Filter Replacement

Prerequisites

Table 1. Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
1	Not Applicable	30 minutes	15 minutes

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

Table 3. Replacement parts
Item	Quantity	Effectivity	Part number	Manufacturer
DD Filter	1	-	Refer to FRU Manual	-

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.

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
PDU must be turned OFF. Refer to Lockout / Tagout 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
At Pen wall side, disconnect the cables from defective DD Filter.

Figure 2. DD Filter cables
Perform the following steps.
1. Remove 10 screws.
2. Loosen 8 screws and remove DD Filter from the Pen Wall.
Figure 3. DD Filter removal
Disconnect the cables from defective DD Filter inner side.

Figure 4. Disconnect cables
Remove 12 screws and remove bracket.

Figure 5. Remove bracket
Restore the DD Filter by reverse order of removal.

Note: Make sure to tighten each screw.
Restore Cabinet cover.