T1 Service Manual                                                                                        7-3 
2.  Carefully separate the front housing from the rear housing. Press the battery door tether to remove the battery 
door from its tether. This will allow separation of the rear housing from the main frame.   
 
 
 
   
 
 
7.3.2.1 Disassembling the Infrared Communication Board 
Unscrew the two M3×8 screws holding the infrared communication board and remove the board from the main frame. 
Disconnect the socket for backup battery cable before removing the infrared communication board. 
   
 
 
 
NOTE 
  When disassembling the infrared communication board, use tweezers to raise the board, and then remove the 
board to prevent from bending the pins. Before reassembling the board, check if the pins of the main board 
and multi-parameter board are ok. 
Press the retaining clip of the battery door tether 
to remove the main frame from the rear housing 
Unscrew the two M3×8 screws 
Disconnect the battery cable socket