SMAR TT400WH, Manual

Page: 31 / 46

Maintenance
3.3
imaginary line 180° in relation to the base of the equipment. If there is a need to rotate the antenna,
loosen the lower fixing screw and travel just above this line. See Figure 3.2
Figure 3.2 –Antenna Safety Rotate
Electrical Circuits
To remove the main board ( 6 ) and the display ( 4 ), it must remove the display cover ( 1 ) by turning it
counterclockwise.
For the steps below, make sure you leave the terminal ON/OFF (Figure 1.4) in the off position (OFF).
To remove the radio board ( 13 ) and the battery module ( 16 ), it must remove the back cover ( 18 ) by
turning it counterclockwise. To remove the input board (
24
), it must first disassemble the sensor
housing, as explained above. To remove the main board ( 6 ), release their two screws ( 5 ) and carefully
remove it. To remove the display (
4
), loosen the four screws (
3
) and carefully remove it. To remove the
radio board ( 13 ), first disconnect it from the main board ( 6 ). This is done most easily by removing the
main board of the housing, as explained above. After disconnecting the boards, loosen the two screws
on the radio board ( 14 ) and carefully remove. To remove the battery module ( 16 ), release their two
screws ( 17 ) and carefully remove it. To remove the input board ( 24 ), first disconnect it from the main
board ( 6 ). This procedure must be done removing the main board, as explained above. After
disconnecting the boards, loosen the two screws on the input board ( 25 ) and carefully remove it.
WARNING
The board has CMOS components which may be damaged by electrostatic discharges. Observe
correct procedures for handling CMOS components. It is also recommended to store the circuit
boards in electrostatic-proof cases.
Reassembly Procedure
WARNING
This operation type must be done in a safety area and with the transmitter no energized.
Figure 3.3 shows the components position mentioned in this description.
The Table 3.3 shows how to mount the transmitter.