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7 FLOW CHART 7SYMPTOMNO WELD OUTPUT, NO VOLTAGE CONTROLPROBLEM AREAPOWER SUPPLY CONTROL (PSCB), THERMOSTAT, TRIAC, CONTACTOR SIGNAL,PWR SWX BOARDSTARTYESIS PSCB LED D7 ON ?(DOES IT HAVE 12 VOLTS)NOJUMPER TP1 TO TP5 ON PSCBNOIS PSCB F1 FUSE OK ?YESNOPSCB IS DEFECTIVEIS PSCB LED D12 ON ?YESREPOSITION JUMPERTO TP2 AND TP4PSCB IS DEFECTIVETRANSFORMER RELAYIS DEFECTIVE OR NO ACINPUT, CHECKDISCONNECT FUSEUSING VOLTMETER, MEASURE WELD VOLTAGEAT COBRA I MAIN BOARD J6-1(+) AND J6-2(-)YESDOES OUTPUT VARY WHEN VOLTAGEKNOB IS TURNEDAPPROX :LO 10 - 32VDCHI 29 - 40VDCNOREPOSITION JUMPER TO TP2AND TP3ADD SECOND JUMPER TO TP1AND TP5YESDOES OUTPUT VARY WHENVOLTAGE KNOB IS TURNEDAPPROX :LO 10 - 32VDCHI 29 - 40VDCNOYESPSCB IS DEFECTIVEIS WELD OUTPUT AT MAXIMUM(APPROX. 35 - 40VDC)NOTRIAC IS DEFECTIVEK2 RELAY ONCOBRA I MAINBOARD DOES NOTSEND CLOSINGCONTACT SIGNALOR TORCH SWITCHIS DEFECTIVETHERMOSTATTERMINALS LOOSE ORTHERMOSTAT ISDEFECTIVE(OPEN ALL THE TIME)TRIAC RESISTANCE CHECK:Use meter in "Diode" mode.Pin 3 to Pin 4 : 2.3Pin 1 to Pin 2 : openCobraMig 260 Owner's Manual - Page 26
8 FLOW CHART 8SYMPTOMDISCONNECT FUSE BLOWS WHEN TORCH IS TRIGGEREDPROBLEM AREAPOWER TRANSFORMER "T1", DIODES, CAPACITORSSTARTTURN OFF ALL POWERAND DISCONNECTSUSING AN OHM METER, MEASURE THE RESISTANCE AT J6-1(WELD VOLTS) AND J6-2 (WORK GROUND) ON COBRA I MAINBOARD, READING SHOULD BE APPROX. 25 OHMNOIS READING OK ?YESDISCONNECT DIODES FROMPOWER TRANSFORMER T1 :ANODE D1 FROM T1-6ANODE D2 FROM T1-5POWER TRANSFORMER "T1"IS DEFECTIVENOIS READING AT J6-1 AND J6-2APPROX. 25 OHM NOW ?YESCAPACITORS SHORTEDSET OHM METER ON DIODE CHECK MODEMEASURE DIODE RESISTANCE :PLACE (+) LEAD ON ANODE AND (-) LEAD ON HEATSINKREADING SHOULD BE APPROX. 300 TO 800 OHMSPLACE (-) LEAD ON ANODE AND (+) LEAD ON HEATSINKREADING SHOULD BE OPEN.NOIS READING OK ?YESDIODE IS DEFECTIVEDIODE IS OKCobraMig 260 Owner's Manual - Page 27
Page 2 and 3: SAFETY CONSIDERATIONSELECTRIC ARC W
Page 4: momentarily with unprotected eyes (
Page 7 and 8: Section AInstallationTechnical Spec
Page 9 and 10: Route input cable through strain re
Page 11 and 12: Coolant Connection (Water Cooled To
Page 13 and 14: WELD VOLTAGEThe weld voltage knob a
Page 15 and 16: PROCESS SETTINGSThe following table
Page 17 and 18: should bisect the 90 degree angle m
Page 23 and 24: Testing the FeederRelay K2 Operatio
Page 25 and 26: CobraMig 260 Owner's Manual - Page
Page 27 and 28: 2 FLOW CHART 2SYMPTOMF3 FUSE ON COB
Page 29 and 30: 4 FLOW CHART 4SYMPTOMCOBRA MAIN BOA
Page 31: 6 FLOW CHART 6SYMPTOMWIRE FEEDS AT
Page 35 and 36: 10 FLOW CHART 10SYMPTOMNO WELD OUTP
Page 37 and 38: Section FAppendicesDiagrams/Parts L
Page 39 and 40: Multi-Tap CV 260001-3850No. Qty. P/
Page 41 and 42: Multi-Tap Bracket Assembly003-1586N
Page 43 and 44: Wire Feeder Assembly003-2131No. Qty
Page 45 and 46: Back Panel Assembly003-2130No. Qty.
Page 47 and 48: Heat Sink Assembly003-1774CNo. Qty.
Page 49 and 50: Control Panel Assembly003-1703No. Q
Page 51 and 52: 42 VAC Front Panel Assembly003-2110
Page 53 and 54: Slave Motor Assembly003-2078No. Qty
Page 55 and 56: CobraMig 260 Owner's Manual - Page
Page 57 and 58: J1910P10J29101112131415161718192021
Page 61 and 62: LIMITED WARRANTYEffective March 1,

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