Optima MR450w BASE 1.5T System Service Methods
5690012-2EN Revision 3
Object ID: 00000018WIA3008BE20GYZ
Topic ID: id_13105818 Version: 3.0
Date: Aug 29, 2019 1:57:42 AM

Cradle Assembly Removal and Replacement

Prerequisites

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

Table 2. Tools and test equipment
Item	Quantity	Effectivity	Part number	Manufacturer
Non-ferrous tool kit	1	-	5113258 or 5112581	-
Wood blocks or similar non-ferrous material for propping up cradle	As needed	-	N/A	-

Table 3. Consumables
Item	Quantity	Effectivity	Part number	Manufacturer
Loctite 242	0.5 CC	-	46-170686P1	-

Table 4. Replacement parts
Item	Quantity	Effectivity	Part number	Manufacturer
16-Channel Cradle Assembly, non-electrical	N/A	Curved non-electrical table	See FRU Manual	-
Cradle Assembly	N/A	Curved 32-channel table	See FRU Manual	-

About this task

Procedure Timing (minutes):

Non-electrical table: 15
32-channel curved table: 30

Not all tables are valid on all systems.

Choose the correct procedure for the type of table you are servicing:

Non-electrical table: Removing Cradle from Curved Non-Electrical Patient Table
32-channel curved table: Removing Cradle from Curved 32-Channel Table

Note: Photographs are for illustration purposes only and may not show the same table you are servicing.

Removing Cradle from Curved Non-Electrical Patient Table

About this task

This procedure describes how to release and remove the cradle from the patient table and how to replace it. Whether you choose to remove the table from the magnet room depends entirely on your service needs.

Procedure

Undock the patient table.
At the same time, press the cradle latch block and push in the cradle release button at the front of the cradle.

Figure 1. Cradle removal
While holding down the latch block and pressing the cradle release button, slide the cradle forward enough so that the cradle covers the top area of the cradle latch block. Release the latch block and cradle release button.

CAUTION

PINCHED FINGERS!

FORWARD MOVEMENT OF CRADLE CAN PINCH FINGER WHILE HOLDING DOWN CRADLE LATCH BLOCK.

MOVE CRADLE FORWARD SLOWLY AND DELIBERATELY UNTIL BOTTOM EDGE OF CRADLE SUFFICIENTLY COVERS TOP OF CRADLE LATCH BLOCK SO THAT YOU CAN REMOVE YOUR FINGER FROM BLOCK.

Push in the right actuator on the table front base.

Note: Pressing the actuator button engages the secondary cradle latch cable and causes the pin stop to move down flush with the table top surface, allowing the cradle to slide forward.
Prop up the cradle or remove the cradle from the patient table to perform desired maintenance.

Figure 3. Propping Up Front of Cradle

Removing Cradle from Curved 32-Channel Table

About this task

Procedure

Undock the patient table.
At the same time, press the cradle latch block and push in the cradle release button at the front of the cradle.

Figure 4. Cradle Removal
While holding down the latch block and pressing the cradle release button, slide the cradle forward enough so that the cradle covers the top area of the cradle latch block. Release the latch block and cradle release button.

CAUTION

PINCHED FINGERS!

FORWARD MOVEMENT OF CRADLE CAN PINCH FINGER WHILE HOLDING DOWN CRADLE LATCH BLOCK.

MOVE CRADLE FORWARD SLOWLY AND DELIBERATELY UNTIL BOTTOM EDGE OF CRADLE SUFFICIENTLY COVERS TOP OF CRADLE LATCH BLOCK SO THAT YOU CAN REMOVE YOUR FINGER FROM BLOCK.

Push in the right actuator on the table front base.

Pressing the actuator button engages the secondary cradle latch cable and causes the pin stop to move down flush with the table top surface, allowing the cradle to slide forward.

Remove the cradle in part or in full, as needed:
1. If you do not need to fully remove the cradle:
  1. Slide the cradle forward far enough to clear the cradle guide rail latches at the rear of the table.
  2. Use wood blocks (or similar) to prop up the front of the cradle.
    
    Figure 6. Propping up Front of Cradle
2. If you need to fully remove the cradle from the table:
  1. Use wood blocks (or similar) to prop up the rear of the cradle at least 12 inches above the table top to expose the cable take-up assembly.
  2. Remove screws and cable cover.
    
    Note:
    These are specific pure brass screws. Do not mix up or replace with standard brass screws.
  3. Remove the four balun screws.
  4. Remove the two coil connector screws.
3. To replace the cradle, perform these steps:
  1. Replace the two coil connector screws.
  2. Replace the four balun screws.
  3. Replace the cable cover and screws.
    
    Note:
    These are specific pure brass screws. Do not mix up or replace with standard brass screws.
  4. Remove blocks used to prop up the rear of the cradle.
  5. Slide the cradle into place on the table.

Replacing P-Port Covers

Procedure

Each P-port cover (front and rear) is attached by a rubber tether. Remove the P-port cover by gently tugging its tether to pull it out.
Replace with a new P-port cover, gently pushing its rubber tether into place.

Finalization

Procedure

Dock the table.
Confirm that the cradle release functions properly.
Confirm that the LPCA connects to the cradle and that the cradle can move into the bore.