Lincoln Electric PRECISION TIG 275 SVM162-B Service Manual
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Lincoln Electric PRECISION TIG 275 SVM162-B Service Manual

Lincoln electric welding system user manual
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PRECISION TIG 275
opyright © Lincoln Global Inc.

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Summary of Contents for Lincoln Electric PRECISION TIG 275 SVM162-B

  • Page 1 RETURN TO MAIN MENU PRECISION TIG 275 opyright © Lincoln Global Inc.
  • Page 6 RETURN TO MAIN MENU RETURN TO MAIN INDEX...
  • Page 8 NRTL/C NRTL/C IEC 60974-1...
  • Page 13 REMOTE CONTROL RECEPTACLE STICK STICK STICK ELECTRODE STUD FIGURE A (Shown without hinged stud cover) TIG TORCH CONNECTION P ANEL WORK WORK WORK STUD CABLE STRAIN RELIEF HOLES See Figure A.3...
  • Page 15 REMOTE RECEPTACLE ARC START INPUT FROM ROBOT (18Vac,10ma switch) Precision TIG Control Common. (Front View) For 18-12P Plug (LECO S12020-27) = 70Vdc max. R = V / 5ma Robotic Common PRESET CONTROL INPUT FROM ROBOT (0 -10Vdc = Rated Output Range) Note: The Interface connection cable may pick up noise interference.

  • Page 22: Digital Display

    DIGITAL DISPLAY DIGITAL DISPLAY (SET) (SELECT) DISPLAY DISPLAY exit Re-entering exited...

  • Page 23: Remote Output Control

    REMOTE RECEPTACLE* (Front View) ARC START REMOTE OUTPUT SWITCH *For 18-12P Plug (LECO S12020-27) Figure B.3 Figure B.3 CONTROL 10K ohm...
  • Page 24 Figure B.4...

  • Page 25: Dip Switch (S1)

    DIP SWITCH (S1) HOT START ARC FORCE...

  • Page 26: Step Trigger Modes

    2 Step Trigger Modes Torch Button Output Current Pre-Flow Post Flow Normal Sequence 2 Step - Restart Disabled (With DIP Switch #2 OFF) Torch Button Output Current Pre-Flow Post Flow Actuate the trigger a second time, during down-slope, to immediately end down-slope. Hold the trigger to maintain crater current.
  • Page 27 4 Step Trigger Modes Torch Button Output Current Pre-Flow Post Flow Normal Sequence 4 Step - Restart Enabled (With DIP Switch #3 ON) Torch Button Output Current Post Flow Pre-Flow Hold the second trigger Actuate the trigger pull for more than 1 holding it less than 1 second to activate the second, to begin...
  • Page 28 C C O O D D E E S S B B E E L L O O W W 1 1 1 1 0 0 0 0 0 0 ( ( K K 1 1 8 8 2 2 9 9 - - 1 1 ) ) 2 or 4-STEP 4-STEP Trigger...
  • Page 29 Setup for TIG Amptrol Welding More + for alum. o xide “Cleaning“ w/o “spitting”or“wetting“ loss. Balanced for equal + and - current. More - for higher “P enetration“. Min. to Max. Max. to Min. Amptrol Amptrol Pulse Frequency 4-6 pps is a typical initial setting. Set for bead shape and travel speed: Higher for thinner plate and faster travel.
  • Page 37 .015 Spark Gap...
  • Page 38 M IN M IN D IS D IS P LA P LA A A C A LA A LA IN G X IM X IM S TF S TF L I N fe a tu ri .. . IL E T SW W EL IT C...

  • Page 39: Control Board

    BACKGROUND CIRCUIT FROM CONTROL BOARD OPTIONAL POWER FACTOR CORRECTION CAPACITORS POWER SWITCH 20 VAC MINIMUM OUTPUT CONTROL REAR GANG POLARITY SWITCH BRIDGE SHUNT 115 VAC THERMOSTAT SOLENOID 115 VAC 20 VAC CONTROL BOARD ADVANCED CONTROL PANEL RECEPTACLE PROTECTION STICK METER BOARD SWITCH BALANCE...
  • Page 40 BACKGROUND CIRCUIT FROM CONTROL BOARD OPTIONAL POWER FACTOR CORRECTION CAPACITORS POWER SWITCH 20 VAC 20 VAC MINIMUM OUTPUT CONTROL REAR GANG POLARITY SWITCH BYPASS BRIDGE SHUNT 115 VAC THERMOSTAT SOLENOID 115 VAC CONTROL BOARD ADVANCED CONTROL PANEL RECEPTACLE PROTECTION STICK METER BOARD SWITCH...

  • Page 41: Scr Operation

    BACKGROUND CIRCUIT FROM CONTROL BOARD OPTIONAL POWER FACTOR CORRECTION CAPACITORS POWER SWITCH 20 VAC MINIMUM OUTPUT CONTROL SCR Operation REAR GANG POLARITY SWITCH BRIDGE SHUNT 115 VAC THERMOSTAT SOLENOID 115 VAC 20 VAC CONTROL BOARD ADVANCED CONTROL PANEL RECEPTACLE PROTECTION STICK METER BOARD...
  • Page 42 BACKGROUND CIRCUIT FROM CONTROL BOARD OPTIONAL POWER FACTOR CORRECTION CAPACITORS POWER SWITCH 20 VAC MINIMUM OUTPUT CONTROL REAR GANG POLARITY SWITCH BRIDGE SHUNT 115 VAC THERMOSTAT SOLENOID 115 VAC 20 VAC CONTROL BOARD ADVANCED CONTROL PANEL RECEPTACLE PROTECTION STICK METER BOARD SWITCH BALANCE...
  • Page 43 BACKGROUND CIRCUIT FROM CONTROL BOARD OPTIONAL POWER FACTOR CORRECTION CAPACITORS POWER SWITCH PRIMARY REAR GANG POLARITY SWITCH BRIDGE SHUNT 115 VAC THERMOSTAT 115 VAC 20 VAC CONTROL BOARD 20 VAC ADVANCED CONTROL PANEL RECEPTACLE MINIMUM OUTPUT PROTECTION STICK CONTROL METER BOARD SWITCH BALANCE...
  • Page 44 BACKGROUND CIRCUIT FROM CONTROL BOARD OPTIONAL POWER FACTOR CORRECTION CAPACITORS POWER SWITCH 20 VAC MINIMUM OUTPUT CONTROL PRIMARY REAR GANG POLARITY SWITCH BRIDGE SHUNT 115 VAC THERMOSTAT SOLENOID 115 VAC 20 VAC CONTROL BOARD ADVANCED CONTROL PANEL RECEPTACLE PROTECTION STICK METER BOARD SWITCH...
  • Page 45 INPUT CATHODE OUTPUT NOTE: AS THE GATE GATE ANODE PULSE IS APPLIED LATER IN THE CYCLE THE SCR OUTPUT GATE IS DECREASED.
  • Page 49 N N O O T T E E : : N N O O T T E E : : N N O O T T E E :...
  • Page 50 Reconnect Procedure T1 Transformer Test.
  • Page 51 T1 Transformer Test. SCR Bridge Test.
  • Page 52 Protection Board Test. T1 Transformer Test.
  • Page 53 Protection Board Test. SCR Bridge Test T1 Transformer Test.
  • Page 54 SCR Bridge Test T1 Transformer Test T1 Transformer Test.
  • Page 55 SCR Bridge Tests.
  • Page 56 Protection Board Test. Reconnect Procedure Gas Solenoid Test.
  • Page 57 Maintenance Section...

  • Page 58: Maintenance Section

    Maintenance Section...
  • Page 59 Maintenance Section. Technical Specifications SCR Bridge Test...

  • Page 60: Scr Bridge Test

    SCR Bridge Test.
  • Page 62 Installation Manual.
  • Page 66 ( ontinued) TRIMMER 304B JUMPER...
  • Page 67 ( ontinued) Figure F1.
  • Page 70 M IN M IN A A C M OT IN G M AX M AX O FF OW W L I N fe at ur in g ... M IC W HI T SW W EL IT CH I S I T I G E LI M PA...
  • Page 72 ( ontinued) Jumper...
  • Page 74 G3909 Table F.3. ( ontinued) Plug See Table F.3. Plug...
  • Page 75 ( ontinued)
  • Page 78 ( ontinued) High Frequency Circuit Disable Procedure. High Frequency Circuit Disable Procedure.

  • Page 80: Removal And Replacement

    G3909 Plug SCR Bridge Assembly SCR4 CATHODE ( ontinued) Removal and Replacement. Test. LIFT BAIL STABILIZER DIODE D1 SCR1 / SCR2 CATHODE SCR3 CATHODE SCR3 / SCR4 ANODE SCR2 ANODE Active SCR SCR1 ANODE...
  • Page 82 ( ontinued) G3909 Plug Figure F.8. Figure F.8...
  • Page 83 6 volt lantern battery ( ontinued) under test...

  • Page 84: Scr Bridge Assembly Removal And Replacement

    ( ontinued) LIFT BAIL STABILIZER DIODE D1 SCR1 ANODE SCR4 CATHODE SCR1 / SCR2 CATHODE SCR3 CATHODE SCR3 / SCR4 ANODE SCR2 ANODE Figure F.8. SCR Bridge Assembly Removal and Replacement.
  • Page 85 5 ms...
  • Page 86 5 ms...
  • Page 87 5 ms...
  • Page 88 5 ms...
  • Page 89 5 ms...
  • Page 92 AY Y A A C W ER OW W L IN tu rin g ... M IC W ER T SW I S I T I G E LIN Y CL HIGH VOLTAGE TRANSFORMER See Figure F.11 Figure F.11. ( ontinued) MOUNTING SCREW INSULATORS...
  • Page 93 M IN M IN D IS D IS A Y Y A A C IN G X IM X IM O W W L I N fe a tu ri .. . IL E W IT I S I IN G T I G E LI O LN...
  • Page 96 CASEFRONT SCREWS F.13. Figure F.13. M IN M IN D IS D IS AY Y A A C A LA A LA R EM R EM O TE IN G XI M XI M O W W L I N fe at u ri W HI...
  • Page 97 ( ontinued)
  • Page 100 ( ontinued) Figure F.14. Figure F.14. See Figure F.14. See Figure F.14. See Figure F.14. See Figure F.14 Figure F.14.
  • Page 101 ( ontinued) LIFT BAIL STABILIZER Negative Shunt Pos. 220A Bridge Mounting Bolts...
  • Page 102 PROCEDURE...
  • Page 104 M IN M IN D IS D IS A Y Y A A C X IM X IM O W W fe a L I N tu ri .. . IL E W IT I S I IN G T I G E LI O LN E LE...
  • Page 106 ( ontinued) Gate Anode Cathode Outer Metal Ring SCR/Diode Rectifier Assembly Removal SCR/Diode Rectifier Assembly Replacement Procedure.

  • Page 110: Control Pc Board

    CONTROL PANEL (VIEWED FROM REAR) 304B METER (VIEWED FROM REAR) CONTROL PC BOARD N.E. MINIMUM OUTPUT DISPLAY 304A 313B MAXIMUM STICK LOCAL BALANCE POST FLOW OUTPUT 313A REMOTE MODE (STICK) (AUTO BAL) (REMOTE) (P. FLOW) (THERMAL) ADVANCED CONTROL PANEL (OPTIONAL) BACKGROUND DOWN SLOPE FREQ...
  • Page 111 CONTROL PANEL (VIEWED FROM REAR) 304B METER (VIEWED FROM REAR) CONTROL PC BOARD N.E. MINIMUM OUTPUT DISPLAY 304A 313B MAXIMUM STICK BALANCE LOCAL POST FLOW OUTPUT 313A REMOTE MODE (STICK) (AUTO BAL) (REMOTE) (THERMAL) (P. FLOW) ADVANCED CONTROL PANEL (OPTIONAL) ON TIME BACKGROUND DOWN SLOPE...
  • Page 112 CONTROL PANEL (VIEWED FROM REAR) 304B METER (VIEWED FROM REAR) N.E. MINIMUM OUTPUT DISPLAY 304A 313B MAXIMUM STICK BALANCE LOCAL POST FLOW OUTPUT 313A REMOTE MODE (STICK) (AUTO BAL) (REMOTE) (THERMAL) (P. FLOW) ADVANCED CONTROL PANEL (OPTIONAL) ON TIME BACKGROUND DOWN SLOPE FREQ 401C...
  • Page 113 CONTROL PANEL (VIEWED FROM REAR) CONTROL PANEL (VIEWED FROM REAR) PANNEAU DE COMMANDE (VIEWED FROM REAR) PANNEAU DE COMMANDE (VIEWED FROM REAR) N.A. CONNECTION IS PIN TO PIN BETWEEN J23 AND J5. PANEL DE CONTROL (VISTO DESDE ATRÁS) PANEL DE CONTROL (VISTO DESDE ATRÁS) N.B.
  • Page 114 CONTROL PANEL (VIEWED FROM REAR) PANNEAU DE COMMANDE (VIEWED FROM REAR) N.A. CONNECTION IS PIN TO PIN BETWEEN J23 AND J5. PANEL DE CONTROL (VISTO DESDE ATRÁS) N.B. ROBOTIC INTERFACE CONNECTION. N.C. REMOVE JUMPER PLUG IN J3 WHEN INSTALLING TIG OPTION PC BOARD. N.D.

  • Page 115: Control Pcb

    TOROID DECIMAL PT. IN IN (+) IN(-) 304B DECMAL PT.OUT 304A IN (-) IN(+) 304B METER 205mV BETWEEN IN(+) & IN(-) IS 205A OR 20.5V (VIEWED FROM REAR) TOROID +10V PRESET (0 - 10V) OUTPUT +1.5V MIN OUTPUT (0 - 1.5V) 10J9 BALANCE (0 - 10V) 12J9...
  • Page 116 G5691 ENGINEERING CONTROLLED CHANGE DETAIL: RELEASED FROM X A.02 TOROID MANUFACTURER: menu options( jumper IN) no menu options ( jumper out) Push & hold at power up = defaults Data Clock MENU METER Menu Switch BOARD SWITCH Meter shows 316D preset &...
  • Page 117 This diagram is for reference only. It may not be accurate for all machines covered by this manual. ® ®...
  • Page 118 This diagram is for reference only. It may not be accurate for all machines covered by this manual. ® ®...
  • Page 119 This diagram is for reference only. It may not be accurate for all machines covered by this manual. ® ®...
  • Page 120 Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician.
  • Page 121 This diagram is for reference only. It may not be accurate for all machines covered by this manual. ® ®...
  • Page 122 This diagram is for reference only. It may not be accurate for all machines covered by this manual. ® ®...
  • Page 123 This diagram is for reference only. It may not be accurate for all machines covered by this manual. ® ®...
  • Page 124 This diagram is for reference only. It may not be accurate for all machines covered by this manual. ® ®...
  • Page 125 This diagram is for reference only. It may not be accurate for all machines covered by this manual. ® ®...
  • Page 126 Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician.

  • Page 127: General Information

    Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician.
  • Page 128 Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician.
  • Page 129 ARC STABILIZER CAPACITOR CONNECTION MADE THROUGH HOLE WITH SOLDER PAD 600V 600V 600V Graphic NOTES : N.A. SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD. THIS DIAGRAM MAY NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON...
  • Page 130 Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician.

  • Page 131: Frame Ground

    LINE 2 (V) 275V 275V .0047 440V FRAME GROUND THE LINCOLN ELECTRIC CO. AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS PERMISSION O F GENERAL INFORMATION ELECTRICAL SYMBOLS PER E1537 CAPACITORS = .022/50V UNLESS OTHERWISE SPECIFIED)

  • Page 132: Bottom View

    Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician.
  • Page 133 This diagram is for reference only. It may not be accurate for all machines covered by this manual. ® ®...
  • Page 134 This diagram is for reference only. It may not be accurate for all machines covered by this manual. ® ®...
  • Page 135 Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician.
  • Page 136 This diagram is for reference only. It may not be accurate for all machines covered by this manual. ® ®...
  • Page 137 This diagram is for reference only. It may not be accurate for all machines covered by this manual. ® ®...
  • Page 138 This diagram is for reference only. It may not be accurate for all machines covered by this manual. ® ®...
  • Page 139 Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician.
  • Page 140 Your Company__________________________ Your Name_____________________________ Please give detailed description below: ___________________________________________________________________________ ___________________________________________________________________________ ___________________________________________________________________________ ___________________________________________________________________________ ___________________________________________________________________________ ___________________________________________________________________________ ___________________________________________________________________________ ___________________________________________________________________________ ___________________________________________________________________________ ___________________________________________________________________________ ___________________________________________________________________________ ___________________________________________________________________________ ___________________________________________________________________________ SD287 01/99 Thank You, Technical Services Group Lincoln Electric Co. 22801 ST. Clair Ave. Cleveland, Ohio 44117-1199 FAX 216-481-2309...

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