281 T / 281 W
Ultima modifica/Last Update: 18/03/2008 Rev0 pagina 17 di
17
EXPLANATION
The varistors are three blue discs near the ground wire of
the power board. These devices are for protecting the
board from input overvoltage. When there is overvoltage
they “explode” causing a short circuit most of the times. If
the extent of the short circuit is very high they become an
open circuit.
The auxiliary transformer is connected by means of a 10-
way connector to the power board. Make sure the outputs
of the transformer are connected correctly and the wir-
ings, whose data are indicated on the auxiliary trans-
former, are inserted into the connector in the following
way and as indicated in the picture.
In order to reset the parameters, switch the machine on
while the S2 and S4 buttons are being pressed.
P
IC
T
U
R
E
6
P
IC
T
U
R
E
7
S2
S4
P
IC
T
U
R
E
5
Varistors