Spacelabs BleaseSirius Technical Manual page 216

6.3.3 Replace the EFM Circuit Board
Parts and Tools Needed:
• 050-0553-00 - Service Kit, EFM, PCBA and SOM Assembly
• 2.5mm and 3mm hex keys
• Phillips screwdriver
• ESD protection
All persons handling ESD must be properly grounded via a 1mW resistive
grounded wrist strap.
Cover all ESD bench tops with grounded conductive mats and connect all
work surfaces and equipment to earth ground.
To replace the EFM circuit board:
1. Remove the top shelf cover, the front cover and the backbar cover from
the BleaseSirius system. See Section 5.1.2 in this manual for instructions.
2. Remove the four hex screws (two on each side) that secure the EFM to
the machine.
3. Disconnect the ribbon cable and the power connector from the EFM.
4. Remove the light pipe from the EFM circuit board.
5. Disconnect the four gas fl ow tubes from the back of the EFM.
6. Remove the EFM from the machine. Place it on a clean surface with the
display side down.
7. Using a 3mm hex key, disconnect the banjo fi tting from the side of the
hypoxic block.
8. Remove the four retaining screws (use a 2.5mm hex) from the back of the
EFM and gently hinge the display screen assembly.
9. Carefully remove the three circuit board connectors.
216
EFM Option