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SPAZIO FORMA: Service & Maintenance manual - rev. 1.0
Follow the procedure step by step to correctly diagnose the problem. Take particular care with the
checks highlighted by circled numbers, which are described in detail below:
WARNING: Carry out these checks with the machine powered up.
(1)
Place the tester probes across pins 4 and 5 of connector K16 on the CPU board to check the
trigger signal. If the board is working properly the signal should be 4.4 Vdc with 0 Vdc pulses
and a frequency of 63 Hz. If the emergency is activated the signal will be constantly at 4.4
Vdc.
Place the tester probes across pins 3 and 5 of connector K16 on the CPU board to check the
emergency signal. If the board is working properly the signal should be 0 Vdc, otherwise it
will be 5 Vdc.
(2)
Place the tester probes across pins 4 and 5 of portable connector CN31 to check the trigger
signal. If the board is working properly the signal should be 4.4 Vdc with pulses of 0 Vdc and
a frequency of 63 Hz. If the emergency is activated the signal will be constantly at 4.4 Vdc.
Place the tester probes across pins 3 and 5 of portable connector CN31 to check the
emergency signal. If the board is working properly the signal should be 0 Vdc, otherwise it
will be 5 Vdc.
(3)
Place the tester probes across pins 4 and 5 of connector J7 on the power isolating board to
check the trigger signal. If the board is working properly the signal should be 4.4 Vdc with 0
Vdc pulses and a frequency of 63 Hz. If the emergency is activated the signal will be
constantly at 4.4 Vdc.
Place the tester probes across pins 3 and 5 of connector J7 on the power isolating board to
check the emergency signal. If the board is working properly the signal should be 0 Vdc,
otherwise it will be 5 Vdc.
(4)
Place the tester probes on pins 1 of connectors J5 and J6 on the power isolating board and
check the signal continuity.
Perform the same operation on pins 2 of connectors J5 and J6 of the power isolating board.
(5)
Place the tester probes across pins 0 and 1 of relay K1 on the power isolating board and check
that the voltage is 12 Vdc.
Page 6.9
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