Motorola MVME956UM2 User Manual

VME64x Bus Backplane

http://www.mcg.mot.com/literature

5-9

To remove or replace the backplane used in the MVME956AC chassis, 
follow these procedures.

1. Turn the power OFF to all equipment and disconnect the power 

cable from the AC power source. 

2. Remove all external cabling connected to modules installed in the 

chassis. Then remove all modules installed in the chassis. 

3. Slide the MVME956AC chassis out from its rack mounting or 

remove the top panel of your lab benchtop unit. 

4. Remove the screws holding the top cover to the chassis and lift off 

the top cover. 

5. For better access to the backplane, you may remove the rear card file 

subassembly from the rear of the chassis by removing the screws on 
the left and right sides of the card file. 

6. Remove all internal cables connected at the rear of the backplane. 

7. Remove all power wires from the rear of the backplane. 

Note: Mark the wire locations carefully so they can be correctly 
reinstalled. Incorrect connection of these wires can cause damage to 
the equipment. 

8. Disconnect the bus bar’s ground and +5V by removing the screws 

that attach it to the backplane.

9. Disconnect the stiffener bar from the chassis by removing the two 

screws located on the left side of the chassis. Then, remove the two 
screws on the right side of the chassis by accessing through the drive 
cable access panel. 

10. Loosen and remove the two rows of screws that secure the 

backplane to the chassis frame members. Then remove the 
backplane.