Main Electronics Board Replacement - MSA Orion G Mode D'emploi

Chapter 6, Warranty, Maintenance and Troubleshooting

Main Electronics Board Replacement

Before handling the circuit boards, ensure you are properly
grounded; otherwise, static charges from your body could
damage the electronics. Such damage is not covered by
the warranty. Grounding straps and kits are available from
electronics suppliers.
1. Turn OFF the power.
2. Remove the battery pack.
3. Remove the four remaining case mounting screws from the
back of the case.
4. Disconnect the pump outlet tube; place a small, flat
screwdriver at the base of the tube and gently pry the tube
away from the barb.
5. Remove the pump cap.
6. Remove the sensor cover and sensors.
7. Tilt the circuit board up at a 90 degree angle to gain access to
the connectors on the under-side of the circuit board.
8. Remove the display ribbon cable by sliding out the locking
tabs on the side of the connector.
9. Remove the membrane switch ribbon cable by sliding out the
locking tabs on the side of the connector.
10. Disconnect the back light fiber optics bundle by spreading
the two clips which hold the back of the LED onto the
circuit board.
11. Connect the new circuit board to the membrane switch
ribbon cable; latch down the two tabs located on either side
of the ribbon socket.
12. Connect the display ribbon cable; latch down the two tabs
located on either side of the ribbon socket.
13. Connect the back light fiber optics bundle; snap the
connector over the LED on the circuit board.
14. Position the circuit board into the case, carefully lining up the
connector for the IR Link circuit board, if so equipped.
15. Install the sensors, gaskets, sensor cover, and pump cap.
6-10
"! CAUTION
Operating Manual