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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:
Execute the following operations procedure when the machine does the reset at the start
up described at paragraph 3.3.2. "The reset procedure".
(1)
Place the tester probes between pins 5 (signal) and 12 (ground) of connector K4 on the CPU
board. When the machine goes up the measured voltage should be approximately 4.65 Vdc.
Place the tester probes between pins 3 (signal) and 12 (ground) of connector K4 on the CPU
board. When the machine goes down the measured voltage should be approximately 4.65 Vdc.
(2)
Place the tester probes between pins 2 (signal) and 12 (ground) of portable connector CN28.
When the machine goes up the measured voltage should be approximately 4.65 Vdc. Place the
tester probes between pins 1 (signal) and 12 (ground) of portable connector CN28. When the
machine goes down the measured voltage should be approximately 4.65 Vdc.
(3)
Place the tester probes between pins 5 (signal) and 12 (ground) of connector J6 on the driver
board. When the machine goes up the measured voltage should be approximately 4.65 Vdc.
Place the tester probes between pins 3 (signal) and 12 (ground) on connector J6 of the driver
board. When the machine goes down the measured voltage should be approximately 4.65 Vdc.
(4)
Check for the click of the relay.
(5)
Place the tester probes between pins 1 and 2 of connector J1 on the driver board. When the
elevation changes the absolute measured value should be approximately 20-24 Vdc.
(6)
Place the tester probes between pins 1 and 2 of connector J5 on the power isolating board.
When the elevation changes the absolute measured value should be approximately 20-24 Vdc.
(7)
Execute the procedure described at paragraph 6.3. "The power isolating board is not
working".
(8)
Place the tester probes between pins 1 and 2 of portable connector CN46. When the elevation
changes the absolute measured value should be approximately 20-24 Vdc.
(9)
Place the tester probes between pin 7 (signal) and 12 (ground) of connector J6 on the driver
board. The signal is normally 5 Vdc and there is a 0 Vdc pulse lasting a few msec if the board
detects an alarm condition.
(10) Place the tester probes between pins 5 (signal) and 6 (ground) of portable connector CN46. It
should be a square wave signal between 8.8 and 11.4 Vdc. The voltage measured with a
multimeter will be approximately 10 Vdc.
(11) Place the tester probes between pins 5 (signal) and 6 (ground) of connector J1 on the driver
board. There should be a square wave signal alternating between 8.8 and 11.4 Vdc. Using a
tester, the reading should be approximately 10 Vdc.
Page 6.31
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