T1 Service Manual                                                                                        7-5 
 
4.  Unscrew the two M3×4 screws that secure the SpO2 board, and then remove the SpO2 board.   
 
 
 
5.  Remove the insulating plate. Unscrew the two plastic M3 hex nuts and the two M3×12 plastic double-screw bolts. 
Detach the tubing. 
 
 
 
   
 
 
Unscrew the two M3×4 screws
Unscrew the two plastic M3 hexagon nuts and 
the two M3×12 plastic double-screw bolts 
Insulating plate 
Detach the air tubing