- Discovery MR750 3.0T System Service Methods
- 5690009-2EN Revision 4
- 00000018WIA30102130GYZ
- id_152710903.7
- Feb 1, 2022 6:39:02 PM
Cradle/table release block adjustment/cradle egress functionality
Adjust the cradle release block position and the cradle release block retraction.
Prerequisites
| Personnel requirements | |||
|---|---|---|---|
| Required persons | Preliminary requirements | Procedure | Finalization |
| 1 | - | 35 minutes | 5 minutes |
| Tools and test equipment | |||
|---|---|---|---|
| Item | Quantity | Part number | Manufacturer |
| Straight Edge (For Example: Non-Ferrous Level) | 1 | - | - |
| Non-Ferrous Measuring Device (For Example: Bridge Height Gauge) | - | - | - |
| Nonmagnetic Titanium Service Tool Kit, Large Set | 1 | 5112581 | - |
About this task
This procedure explains how to adjust the cradle release block position and how to adjust the cradle release block retraction. The cradle release block retraction procedure shows how to adjust the cable to meet the system specification.
Cradle release block position adjustment
Procedure
Lower the table lock safety bar.Warning 
Risk of personal injurySevere injury can occur if the table is accidentally lowered during maintenance.When doing maintenance with the table in the Up position, make sure the lock bar is safely engaged.Figure 1. Table lock safety bar 
- Remove the patient table bottom front cover.
Figure 2. Curved table bottom front cover 
Figure 3. Flat table bottom front cover 
- Loosen the 4 hex socket head screws securing the release block assembly.
Figure 4. Bottom view of cradle release block assembly 
- Adjust the housing's position to minimize the distance between the latch and the latch housing. Cycle (press) the latch several times, to make sure the latch never sticks in the down position.
Figure 5. Cradle release latch - correct position 
Figure 6. Cradle release latch - wrong position 
Cradle release block retraction adjustment
Procedure
- Release the cradle from the carriage and drive the LPCA into the bore.
Figure 7. Cradle released from LPCA 
Figure 8. View of cradle release block with table docked 
- Place a straight edge (for example, a level) across the front edge of the patient table.
Figure 9. Measuring the height of the cradle release block (not pressed) 
1 Bridge height gauge 2 Measurement point for cradle release block - Place a measuring device (for example, the bridge height gauge) onto the cradle release latch so that the current height can be measured.
Figure 10. Measure current height 
Press the cradle release block. Measure the change in height. The maximum height change is 1.0 mm.
Figure 11. Press the cradle release block 
If the height change is ≤ 1 mm, proceed to Finalization.
If the height change is ≥ 1 mm, do the cradle release block adjustment.
- Loosen the lock nut, then tighten or loosen the cable adjustment screw in the pivot block so that the cradle release block is flush or just below the level of the table top.
Figure 12. Cradle release block retraction adjustment 
Figure 13. Fine adjustment and course adjustment locations 
1 Fine adjustment 2 Coarse adjustment Figure 14. Fine adjustment screw and lock nut 
1 Fine adjustment screw 2 Lock nut Note: If the adjustment screw does not provide enough range for adjustment, loosen the coarse adjustment set screw to change the cable length. Fine adjustment is required after doing a coarse adjustment.
Finalization
Finalization
- Dock the table to the magnet and ensure that the table/cradle functions correctly.
- Ensure that the table undocks, and that the LPCA is released when the undock pedal is depressed.