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CEBORA S.p.A.
3.3.4 - In TIG mode, the start button does not generate output voltage.
START COMMAND TEST.
Power board (11), connector CN1, terminals 7 (+) and 10 (-) = voltage of the START Signal
as shown in the table.
Accessories
connected
to the connector H
None / art. 187
TIG torches / art.
181
♦ Check the wiring between CN1 power board (11) and CN1 panel board (16).
♦ Check the status of the jumper on terminals 8 and 3 of the connector of the
accessory connected to the connector (H), according to table conditions (see
description in par. 2.3).
♦ Check the cable and start button of the accessory being used. If defective, replace.
♦ With power source off, temporarily disconnect connector CN1 on power board
(11) and make sure that the terminals 7 and 10 of CN1 on power board (11) are
not short-circuited. If necessary replace the power board (11).
♦ Check the supply voltages for the panel board (16), performing the PANEL
BOARD (16) POWER SUPPLY TEST, in par. 3.3.1, if necessary.
♦ Replace the power (11) and/or panel (16) boards.
♦ Check the wiring between CN1 power board (11) and CN1 panel board (16).
♦ Replace the power board (11).
3.3.5 - In open circuit operation, the output voltage is not regular.
OPEN-CIRCUIT OUTPUT VOLTAGE TEST.
Output terminal – power source (-) and output terminal + power source (+) = +96 Vdc
approximately, in MMA without accessories connected to the connector (H), or in TIG mode
with start button pressed.
♦ Check connections between terminals "-V" and "+V" of the power board (11) and
output terminals "-" and "+"of the power source. If you find loose connections,
tighten and replace any damaged terminals.
♦ Make sure that both the internal and external start commands are working
properly, by carrying out the test in par. 3.3.4.
♦ Replace the power board (11).
♦ Correct operation.
3.302.113
Jumper 8-3
Operating mode
connector H
Open
MMA/MMA cell
Closed
Correct?
YES
Correct?
YES
Start
button
Absent
Released
TIG
Pressed
NO
NO
Signal
Output
START
voltage
1.5 – 4 Vdc
YES
>4 Vdc
NO
<1.5 Vdc
YES
20/11/02
10
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