39 - Nozzle Current Transducer Reading Error; 40 - Hazardous Voltage - Cebora PLASMA PROF 164 HQC Service Manual

CEBORA S.p.A.

3.4.5 - 39 - Nozzle current transducer reading error.

NOZZLE CURRENT TRANSDUCER TEST.
Settings board (54), connector J1, terminals 1(+) – 3(-) = approximately 0 Vdc, with Power
Source powered without delivering current.
♦ Check the wiring between J1 settings board (54) and J2 pilot arc board (58).
♦ With Power Source off, temporarily disconnect the connector J1 from settings
board (54) and check the resistance between terminals 1 and 3 of J1 on settings
board (54). Correct value = approximately 22 Kohm. If incorrect, replace settings
board (54).
♦ Check supply voltages of the pilot arc current transducer by performing the
NOZZLE CURRENT TRANSDUCER POWER SUPPLY TEST, in par. 3.3.10.
♦ Replace the pilot arc board (58).
NOZZLE CURRENT SIGNAL TEST.
Control board (38), connector J7, terminals 2(+) – 1(-) = approximately 0 Vdc, with Power
Source powered without delivering current.
♦ Check the wiring between J7 control board (38) and J3 settings board (54).
♦ With Power Source off, temporarily disconnect the connector J7 from control
board (38) and check the resistance between the terminals 2-1 of J7 on control
board (38). Correct value = >1 Mohm. If incorrect, replace control board (38).
♦ Replace the settings board (54).
♦ Replace the control board (38).

3.4.6 - 40 - Hazardous voltage.

HAZARDOUS VOLTAGE PRESENCE TEST.
Torch board (42), connector J8, terminals 4(+) - 1(-) = approximately 0 Vdc, with Power
Source powered, without start command (approximately +280 Vdc, with pilot arc off, or
approximately +150 - +190 Vdc, with pilot arc lit, after pressing the start command).
♦ Check the wiring between connector J8 of torch board (42) and terminal (53)(-) of
the Power Source, and output terminal (+) of the Power Source (Gifas).
♦ Make sure output voltage is being generated, performing if necessary the tests in
par. 3.3.6..
3.302.218
Correct?
YES
Correct?
YES
Correct?
YES
NO
NO
NO
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9/8/2006