Cebora SOUND MIG 3840/T Pulse Service Manual page 18

CEBORA S.p.A.
♦ With the power source off, temporarily disconnect the connectors J6, J8 and J10
on flyback board (539) and make sure that on J18, terminals 1 (+) - 6 (-) on motor
control board (232) voltage = +55 Vdc. If correct, identify which of the three
disconnected connectors is causing the incorrect value of the voltage on J18 (55
Vdc), and eliminate the cause of the probable overload or short-circuit, replacing
the control (543) and/or pre-charge (562) boards if necessary.
♦ Replace the motor control (232) and/or flyback (539) boards.
CONTROL PANEL (324) POWER SUPPLY TEST.
Control panel (324), connector J1, terminals 1 (+) – 2 (-) = +8 Vdc.
♦ Check the wiring between J1 control panel (324) and J12 motor control board
(232).
♦ With the power source off, temporarily disconnect connector J1 on control panel
(324) and check the resistance between terminals 1 and 2 of J1 on control panel
(324). If short-circuited, replace control panel (324) and/or motor control board
(232).
♦ With the power source off, temporarily disconnect connector J15 on motor control
board (232), and make sure the voltage on terminals 1 (+) – 2 (-) of J1 on control
panel (324) = +8 Vdc. If correct, check the wiring between J1 connector board
(225) and J15 motor control board (232) and replace the connector board (225) if
necessary.
♦ Replace control panel (324) and/or motor control board (232).
♦ Make sure the micro board on the panel board in the control panel (324) is properly mounted,
especially that there are no bent pins or short-circuits between the pins of the connector J2 on
the micro board of the control panel (324).
♦ Check the wiring of the CAN-BUS communication line, carrying out the CAN-BUS
COMMUNICATION TEST in par. 3.5.3.
♦ Replace control panel (324) and/or motor control board (232).
3.302.191
Correct?
YES
NO
18
15/02/05