MC Box Chassis Replacement

Prerequisites

Table 4. Safety

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.

Table 5. Required conditions
Condition	Reference	Effectivity
System Power must be turned OFF. Refer to Lockout / Tagout for System Cabinet PDU Main Breaker.	-	-

Remove LPCA Cover. Refer to LPCA Cover Removal.
Remove all the cables from MC Box Assy.
Remove 2 screws from rear of MC Box Assy.

Figure 1. Two screws
Loose 4 screws that fix the front of MC Box Assy.
Slide the defective MC Box Assy toward the rear side slightly to steer clear of the belt screws and then slide towards the front to remove it.

Figure 2. MC Box assy removal
Loosen a screw that fixes the fixture bar.
Slide and remove the fixture bar.

Figure 3. Remove Fixture Bar
Slide and remove all Pre-Amp.

Figure 4. Remove Pre-Amp
Restore all preamps to the new MC Box Chassis.
Restore the assy by the reverse order of the removal.

Restore the Power. Refer to Lockout / Tagout for System Cabinet PDU Main Breaker.
Run MCR tool.
Run one head or body scan.