47
018717 • Version
1.1 • 23.01.2007
How to replace the control board,
continued
Procedure
Follow these steps to replace the control board:
Step
Action
1
Switch of all the power to the unit
2
Release the control board by unscrewing the screw that hold it in place
3
Release the two locking mechanisms in each side of the control board and
carefully pull up the control board
4
Place the control board on an even surface and remove the EPROM with a
EPROM tong
NB: The EPROM should not be touched, use a tong
5
Mount the EPROM on the new control board.
Note the small notch in the one end of the EPROM. This notch must be
situated just opposite the equivalent notch in the EPROM-holder on the print
6
Push the control board in place in the holder on the Silencio and lock the two
locking mechanisms in each side of the control board.
7
Tighten the control board with the screw
8
Connect the power
Result: The test program runs through all functions.
Check that the unit does not come out with an alarm signal.
In case of an alarm signal, please see section “Fault finding guide”, page 71
