Instruction manual

Revision date: 26.02.2013 Page 20 of 32
PROBLEM
CAUSE
SOLUTION
The wire feeding
unit motor does not
work.
− Primary fuse of the
auxiliary transformer is
damaged
− Control signals from the
front panel do not reach
the motor board.
− The motor board is
damaged.
Unplug the machine. The delayed fuse 5x20 800 mA on
the back of the machine must be replaced.
• Check the connection of the motor feeding wire on the
front panel and after that check the continuity between
the front panel and the amphenol connector (picture 9).
Check connections between the front panel and the
white 4-pin connector; if connections are not interrupted,
replace the front panel.
• The motor board must be replaced.
PICTURE 1
PICTURE 2
Position of the connector in which they are inserted:
• thermal protection device : position 2, 5 (yellow
wires)
• Wire for the output voltage reading: position 3 (red)
• Shunt wire: pin 1/ 4.
Check the conductivity of contact of the thermal
protection device with the diode tester, with the heat
sink part temperature less than 40° C.
Check the conductivity between: + socket and the
shunt; - socket and the output voltage wire
Remove the snubber board and check that the transils
are not in short circuit.
At the ends of the two transils (see below) positioned
on the snubber board, “OL” must always be measured.