10.1.2 Replacing the Driver board
1.
Remove the plastic timer cover loosening the two sealing screws
placed on the top part. Pull the cover to release the locking pins.
To make the operation easier, disconnect all wires between wall plate
and cover. The flat cable connecting the CPU board and the Driver
board has to be removed from the connector on the Driver board.
2.
Disconnect cables from connectors X2, X4 (including shield W2) and
main power supply cable from connector X5 (Figure 6-19).
3.
Remove the board and assemble the new one, fixing it.
4.
Connect the cables disconnected at step 2.
5.
Connect all the connections cables between wall plate and cover;
close the timer again.
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