Power Source Powered, Led (V) Lit, Fan (45) Stopped; The Start Button Produces No Effect - Cebora PLASMA PROF 80 Service Manual

CEBORA S.p.A.

3.3.2 - Power source powered, led (V) lit, fan (45) stopped.

FAN (45) TEST.
Fuse board (18), connector J5, terminals A and B = approximately 230 Vac, with switch (8)
closed, both with mains at 230 and at 400 Vac.
♦ Check the wiring between connector J5, fuse board (18) and fan (45).
♦ Check the presence of service voltages, performing the SERVICES POWER
SUPPLY TEST in par. 3.3.1 if necessary.
♦ With power source off, temporarily disconnect terminals A and B of J5 on fuse board (18) and
make sure resistance on the terminals of the fan (45) disconnected from J5, fuse board (18) =
approximately 60 ohm. If correct, make sure that there are no mechanical impediments
blocking the fan (45). If incorrect, replace fan (45).
♦ Replace the fan (45).

3.3.3 - The start button produces no effect.

START COMMAND TEST.
Control board (9), terminals J8 A and B = approximately 24 Vac, with start button on torch
released; approximately 0 Vdc, (contact closed) with button pressed.
♦ Check on control board (9), connector J6 terminals 1 and 2, voltage =
approximately 24 Vac, with power source powered. If incorrect, with the power
source off temporarily disconnect connector J6 from control board (9) and make
sure resistance on the terminals of J6 of control board (9) = >1 Kohm. If correct
check the wiring between J6 of control board (9) and J1 of fuse board (18), and
perform the SERVICES POWER SUPPLY TEST in par. 3.3.1 if necessary. If
incorrect, replace control board (9).
♦ Check the wiring between terminals J8 of control board (9), terminals 1 and 9
central adapter (12), torch button and contact of the nozzle guard on the torch.
♦ Make sure that the nozzle guard is correctly assembled and in good working order
on the torch. If defective or showing signs of wear, replace.
♦ Check torch button. Replace if defective.
♦ Replace control board (9).
♦ Perform the CONTROL BOARD (9) POWER SUPPLY TEST, par. 3.3.1.
♦ Replace control board (9).
3.302.167
Correct?
YES
Correct?
YES
NO
NO
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25/06/04