Discovery MR750 3.0T System Service Methods
5690009-2EN Revision 4
Object ID: 00000018WIA3045A030GYZ
Topic ID: id_12374876 Version: 1.13
Date: Oct 11, 2021 3:47:41 PM

Touch-n-Go (TnG) strip and side bumper replacement

Prerequisites

Table 1. Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
1	-	75 minutes	-

Table 2. Tools and test equipment
Item	Quantity	Effectivity	Part number	Manufacturer
5/32 inch Allen wrench	1	-	-	-
3/8 inch open end wrench	1	-	-	-
Medium Phillips screwdriver	1	-	-	-

Table 3. Replacement parts
Item	Quantity	Effectivity	Part number	Manufacturer
Front RH TnG Assembly	1	-	See FRU manual.	-
Arm Board TnG Assembly	1	-	See FRU manual.	-
Rear RH TnG Assembly	1	-	See FRU manual.	-
Front LH TnG Assembly	1	-	See FRU manual.	-
Arm Board TnG Assembly	1	-	See FRU manual.	-
Rear LH TnG Assembly	1	-	See FRU manual.	-
Front RH Side Bumper	1	-	See FRU manual.	-
Arm Board Bumper (use for RH or LH side)	1	-	See FRU manual.	-
Rear RH Side Bumper	1	-	See FRU manual.	-
Rear RH Side Bumper for OR-Compatible Table	1	-	See FRU manual.	-
Front LH Side Bumper	1	-	See FRU manual.	-
Rear LH Side Bumper	1	-	See FRU manual.	-
Rear LH Side Bumper for OR-Compatible Table	1	-	See FRU manual.	-

About this task

Overview

On each side of the patient table along the top edge, there are Touch and Go (TnG) strips that run the length of the table. A closer look at the TnG strips internally shows that each side is made up of three individual strips connected by jumpers. If one of the strips fails, replace only that specific strip. In other words, you do not have to replace the entire side. Be certain of which strip you are replacing because each one has a separate part number. See the Table 3 section for all part numbers.

Note: The Touch and Go feature is not included on the OR-compatible table.

This procedure also covers replacing the table side bumpers. The convenience of replacing any of the three side bumpers on either side of the table is that a TnG strip is contained within a side bumper. Therefore, whether you need to replace a TnG strip or a side bumper, you need to remove the TnG strip from its respective side bumper.

Note: The OR-compatible table (table without TnG strips) has unique part numbers for the rear LH side bumper and the rear RH side bumper.

Procedure

Undock the patient table and move it out of the magnet room.

Figure 1. Table covers
At the front of the table, remove the front bottom cover (4 screws).

Figure 2. Front Bottom Cover
At the foot of the table, remove the rear bottom cover (located above the pedals, 4 screws).
Remove the screws from the top of the bellows on the side being serviced (five screws on each side hold the upper bellows to the bottom side of the table). Do not remove the bellows from the table; leave it in the down position.
(Skip this step for tables without TnG strips.) To remove the table handle, at the foot of the table rotate the handle down by pushing the silver button on the left side of the table to release the table. Use a 5/32 inch Allen wrench to remove hex socket screws, one on each side, from the table handle. Push the silver button again to rotate the handle back up to allow the handle to slip off.

Figure 3. Table Handle in Down Position
Note: Side cover removal: Determine which TnG strip or side bumper to replace, and then pay attention to the following:
- If replacing the front TnG strip or side bumper, remove the front table side cover (4 screws).
- If replacing the middle TnG strip or side bumper, remove both front and rear table side covers (8 screws).
- If replacing the rear TnG strip or side bumper, remove the rear table side cover (4 screws).
On the bottom right or left side of the table, remove the appropriate side cover screws and then slide the side cover down.

Figure 4. Side cover, bottom side screws

Figure 5. Side cover, bottom side screws
(Skip this step for tables without TnG strips.) Disconnect the connection(s) from the TnG strip/side bumper assembly that is being replaced.
Use a 3/8 inch open end wrench to remove nuts and washers from the appropriate front, middle, or rear TnG strip/side bumper studs.

Figure 6. Side cover, side bumper, TnG strip diagram
Slide the TnG strip/side bumper assembly away from the table chassis.
Disassemble the TnG strip from the side bumper and replace the appropriate part.
Reverse Step 7 through Step 10 to reassemble TnG strip(s), side bumper(s), and table side cover(s).
(Skip this step for tables without TnG strips.) Dock the table and ensure that the TnG strips are working correctly.
Reinstall the table side covers.
Replace the table handle screws, one on each side, using a 5/32 inch Allen wrench.
Reattach the top side bellows screws to the bottom side of the table.