Instruction/ maintenance manual of the product PRECISION TIG 275 SVM162-B Lincoln Electric
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PRECISION TIG 275 SER VICE MANUAL SVM162-B January , 2008 Safety Depends on Y ou Lincoln arc welding and cutting equipment is designed and built with safety in mind. However , your overall safety can be increased by proper installation ... and thoughtful operation on your part.
SAFETY i i i i Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC FOR ENGINE powered equipment. 1.a. T urn the engine off before troubleshooting and maintenance work unless the maintenance work requires it to be running.
SAFETY i i i i i i i i Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC FUMES AND GASES can be dangerous. 5.a. Welding may produce fumes and gases hazardous to health. Avoid breathing these fumes and gases.When welding, keep your head out of the fume.
S S A A F F E E T T Y Y i i i i i i i i i i i i Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC Mar ʻ95 FOR ELECTRICALL Y powered equipment. 8.a. Turn off input power using the disconnect switch at the fuse box before working on the equipment.
S S A A F F E E T T Y Y i i v v i i v v Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC Mar ʻ93 PRÉCAUTIONS DE SÛRETÉ Pour votre propre protection lire et obser.
v v PRECISION TIG 275 MASTER T ABLE OF CONTENTS FOR ALL SECTIONS Page Safety ................................................................................................................................................. i-iv Installation ..........
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC A-1 A-1 T ABLE OF CONTENTS - INST ALLA TION SECTION - PRECISION TIG 275 Installation T echnical Specifications ........................................................
A-2 INST ALLA TION PRECISION TIG 275 A-2 TECHNICAL SPECIFICA TIONS- PRECISION TIG 275 (Domestic, Canadian & Export V oltage + 10% 208/230/460 460/575 220-230/ 380-400/415 Max.
K1826-1, -2 K1827-1 K2619-1,-2 K1825-1 A-3 INST ALLA TION PRECISION TIG 275 A-3 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to M.
A-4 PRECISION TIG 275 A-4 INST ALLA TION SAFETY PRECAUTIONS Read entire Installation Section before installing the Precision Tig 275. ELECTRIC SHOCK can kill.
A-5 INST ALLA TION A-5 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC 3. Be sure the torch and work cable rubber coverings are free of cuts and cracks that allow high frequen- cy leakage.
A-6 INST ALLA TION PRECISION TIG 275 A-6 Recommended Cable Sizes for Combined Lengths of Copper Work and Electrode Cables using 75 o C Wire: Machine Rating 0 to 100 Ft .
A-7 INST ALLA TION PRECISION TIG 275 A-7 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return t.
A-8 INST ALLA TION PRECISION TIG 275 A-8 AUXILIAR Y POWER CONNECTIONS The Precision TIG machines provide a standard NEMA 5-15R duplex receptacle, located on the upper case back on the torch side of the machine: • The bottom outlet of this duplex receptacle provides switched 1 15V AC power for the Under-Cooler , or W ater Solenoid accessory .
A-9 INST ALLA TION PRECISION TIG 275 A-9 ROBOTIC INTERF ACE CONNECTION Robotic interface can be made at the Remote Receptacle (See Operation Section ). The machine is shipped with the remote receptacle circuit internally connected to receptacle J5 of the Control board for standard Amptrol operation.
A-10 NOTES PRECISION TIG 275 A-10 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Maste.
B-1 B-1 PRECISION TIG 275 Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC T ABLE OF CONTENTS - OPERA TION SECTION - Operation .........................................................................................
SAFETY PRECAUTIONS Read and understand this entire section before operat- i ng th e m a ch in e . ELECTRIC SHOCK CAN KILL. *Only qualified personnel should per- form the installation. * T urn the input power OFF at the dis- connect switch or fuse box.
B-3 OPERA TION B-3 RECOMMENDED PROCESSES The Precision TIG 275 is recommended for the TIG (GT AW) and Stick (SMAW) welding processes within its output capacity range of 2 amps DC, or 5 amps AC, to 340 amps AC/DC.
B-4 OPERA TION B-4 1. POWER SWITCH - Input line switch turns input power ON or OFF , as indicated by the on or of f sta- tus of the front panel displays. 2. POLARITY SWITCH – The 3-position rotary power switch has detente positions for DC-, AC and DC+ selections for the Electrode output welding polarity .
B-5 OPERA TION B-5 • When the Polarity Switch is set to DC (- or +), the TIG mode provides high frequency only for starting. • Hi-Freq. turns on after pre-flow time with the arc start switch closure, and turns off when the arc is established* • DC+ polarity can also be used for ”balling” of the tungsten for AC TIG welding.
B-6 OPERA TION FOR CODES ABOVE 1 1000 ONL Y B-6 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Retu.
B-7 OPERA TION B-7 8. DIGIT AL METER AND DISPLA Y SWITCH – A 3- digit LED meter is used to monitor the preset and actual welding procedure based on the Display (momentary) switch position: • Befor.
B-8 OPERA TION B-8 • The 4-Step position allows welding without contin- uously holding the start switch trigger . The arc start switch functions in the following manner: 1. Closing the switch starts preflow , then arc starts at Minimum (Start) setting level (See Item 7).
B-9 OPERA TION B-9 INTERNAL SET UP CONTROLS Precision TIG 275 models which have an Advanced Panel (K1829-1) option installed* have the following additional control features which are set up using the DIP Switch (S1) provided on the internal panel of this option.
B-10 OPERA TION B-10 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC FIGURE B.
B-11 OPERA TION B-11 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC FIGURE B.
B-12 OPERA TION B-12 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC PREFLOW F ixed 0.5 sec or x2 S TART TIME Manual in 4-Step UPSLOPE F ixed<0.
B-13 OPERA TION B-13 PRECISION TIG 275 FIGURE B.6 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC Max. to Mi n. Am pt rol Min. to Ma x.
B-14 OPERA TION B-14 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to .
C-1 C-1 PRECISION TIG 275 T ABLE OF CONTENTS - ACCESSORIES - Accessories ........................................................................................................................... Section C Optional Equipment for Codes Below 1 1000 ..
C-2 ACCESSORIES FOR CODES BELOW 1 1000 C-2 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to.
C-3 ACCESSORIES FOR CODES ABOVE 1 1000 C-3 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to.
C-4 NOTES PRECISION TIG 275 C-4 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master .
D-1 D-1 PRECISION TIG 275 Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC T ABLE OF CONTENTS -MAINTENANCE- Maintenance ................................................................................................
D-2 MAINTENANCE D-2 PRECISION TIG 275 ELECTRIC SHOCK can kill. • Only qualified personnel should perform this maintenance. • T urn the input power OFF at the disconnect switch or fuse box before working on this equipment. • Do not touch electrically hot parts.
D-3 MAINTENANCE D-3 SERVICE PROCEDURES Operation of the Precision TIG should be trouble-free for the life of the machine. Should a malfunction occur , however , the following procedures will be useful.
D-4 MAINTENANCE D-4 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC 1. Case Front Assembly 2. Arc Starter and Bypass Assembly 3.
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC E-1 E-1 PRECISION TIG 275 Theory of Operation .............................................................................................................. Section E General Description .
E-2 E-2 PRECISION TIG 275 FIGURE E.2 – GENERAL DESCRIPTION AND INPUT POWER CIRCUIT POWER SWITCH RECONNECT PANEL O PTIONAL POWER FACTOR POLARITY SWITCH B YPASS BOARD WORK FRONT E LECTRODE R EAR ELECT.
E-3 E-3 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC OUTPUT RECTIFICA TION, CONTROL BOARD AND FEEDBACK The AC output from the main transformer secondary is rectified and controlled through the SCR bridge.
E-4 E-4 PRECISION TIG 275 THEOR Y OF OPERA TION FIGURE E.4 – HIGH VOL T AGE / HIGH FREQUENCY CIRCUIT POWER SWITCH RECONNECT PANEL OPTIONAL POWER FACTOR POLARITY SWITCH BYPASS BOARD W ORK F RONT ELEC.
E-5 E-5 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC DC.
E-6 E-6 PRECISION TIG 275 AC WELDING OUTPUT Rotating the polarity switch to the AC position changes the welding power circuit. One lead (X1) of the main transformer secondary is connected to the machineʼs output work terminal. The other secondary lead (X2) is connected to one of the AC connections of the SCR bridge.
E-7 E-7 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SCR OPERA TION A silicon controlled rectifier (SCR) is a three-terminal device used to control rather large currents to a load.
E-8 E-8 PRECISION TIG 275 PROTECTION CIRCUITS Protection circuits are designed into the PRECISION T ig 275 machine to sense trouble and shut down the machine before the trouble damages internal machine components. Both thermal protection and current over- load are included.
F-1 F-1 PRECISION TIG 275 Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC T roubleshooting & Repair Section ................................................................................Section F How to Use Troubleshootin g Guide .
F-2 F-2 PRECISION TIG 275 HOW TO USE TROUBLESHOOTING GUIDE Service and repair should be performed by only Lincoln Electric Factory T rained Personnel. Unauthorized repairs performed on this equipment may result in danger to the technician and machine operator and will invalidate your factory warranty .
ELECTRIC SHOCK can kill. *Have an electrician install and service this equipment. Turn the machine OFF before working on equipment. Do not touch electrically hot parts . Sometimes machine failures appear to be due to PC Board failures. These problems can sometimes be traced to poor electrical connections.
F-4 F-4 PRECISION TIG 275 TROUBLESHOOTING & REP AIR Observe Safety Guidelines TROUBLESHOOTING GUIDE detailed in the beginning of this manual. If for any reason you do not understand the test proce.
F-5 F-5 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
F-6 F-6 PRECISION TIG 275 TROUBLESHOOTING & REP AIR Observe Safety Guidelines TROUBLESHOOTING GUIDE detailed in the beginning of this manual. If for any reason you do not understand the test proce.
The machine has welding output in the Stick mode but no output in the TIG mode. ( no gas flow or high fre- quency). SEE NOTE BELOW 1. Make sure the Stick/TIG switch is i n t he p rope r p osit ion and operating correctly . 2. The remote control device may be faulty .
F-8 F-8 PRECISION TIG 275 TROUBLESHOOTING & REP AIR Observe Safety Guidelines TROUBLESHOOTING GUIDE detailed in the beginning of this manual. If for any reason you do not understand the test proce.
F-9 F-9 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
F-10 F-10 PRECISION TIG 275 TROUBLESHOOTING & REP AIR Observe Safety Guidelines TROUBLESHOOTING GUIDE detailed in the beginning of this manual. If for any reason you do not understand the test pro.
F-11 F-11 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
F-12 F-12 PRECISION TIG 275 TROUBLESHOOTING & REP AIR Observe Safety Guidelines TROUBLESHOOTING GUIDE detailed in the beginning of this manual. If for any reason you do not understand the test pro.
F-13 F-13 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
F-14 F-14 PRECISION TIG 275 TROUBLESHOOTING & REP AIR Observe Safety Guidelines TROUBLESHOOTING GUIDE detailed in the beginning of this manual. If for any reason you do not understand the test pro.
F-15 F-15 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
F-16 F-16 PRECISION TIG 275 If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely , con- tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
F-17 F-17 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR Observe Safety Guidelines TROUBLESHOOTING GUIDE detailed in the beginning of this manual.
F-18 NOTES F-18 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Maste.
F-19 F-19 PRECISION TIG 275 TROUBLESHOOTING & REP AIR METER CALIBRA TION ADJUSTMENTS Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may result in danger to the technician or machine operator and will invalidate your factory warranty .
F-20 F-20 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC .
F-21 F-21 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR AMMETER CALIBRA TION PROCEDURE 1.
F-22 F-22 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC .
F-23 F-23 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC .
F-24 F-24 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR HIGH FREQUENCY CIRCUIT DISABLE PROCEDURE (continued) PROCEDURE 1.
F-25 F-25 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR PROTECTION BOARD TEST Service and repair should be performed by only Lincoln Electric factory trained personnel.
F-26 F-26 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR PROTECTION BOARD TEST (continued) 1.
F-27 F-27 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR T1 MAIN TRANSFORMER TEST Service and repair should be performed by only Lincoln Electric factory trained personnel.
F-28 F-28 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR T1 MAIN TRANSFORMER TEST (continued) TEST PROCEDURES 1.
F-29 F-29 PRECISION TIG 275 TROUBLESHOOTING & REP AIR T1 MAIN TRANSFORMER TEST (continued) T able F .3 - T1 T ransformer V oltages TEST POINTS ACCEPT ABLE VOL T AGES SECONDAR Y WINDINGS PLUG J1 1 .
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC F-30 NOTES F-30.
F-31 F-31 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR GAS (W A TER) SOLENOID TEST Service and repair should be performed by only Lincoln Electric factory trained personnel.
F-32 F-32 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR GAS (W A TER) SOLENOID TEST (continued) TEST PROCEDURE 1.
F-33 F-33 PRECISION TIG 275 TROUBLESHOOTING & REP AIR ST A TIC SCR TEST Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may result in danger to the technician or machine operator and will invalidate your factory warranty .
F-34 F-34 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR ST A TIC SCR TEST (continued) TEST PROCEDURE 1.
F-35 F-35 PRECISION TIG 275 TROUBLESHOOTING & REP AIR ACTIVE SCR TEST Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may result in danger to the technician or machine oper ator and will invalidate your factory warranty .
F-36 F-36 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR ACTIVE SCR TEST (continued) TEST PROCEDURE 1.
F-37 F-37 PRECISION TIG 275 TROUBLESHOOTING & REP AIR ACTIVE SCR TEST (continued) SW2 R2 R1 V A G C SCR under test 6 volt lantern battery + SW1 Figure F .
F-38 F-38 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR ACTIVE SCR TEST (continued) 6.
F-39 TROUBLESHOOTING & REP AIR F-39 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Ma.
F-40 F-40 PRECISION TIG 275 TROUBLESHOOTING & REP AIR 0V 5 ms 20V TYPICAL OUTPUT VOL T AGE W A VEFORM - MACHINE LOADED TO 200 AMPS AC - TIG MODE HIGH VOL T AGE/ HIGH FREQUENCY can damage test equipment. Perform all voltage and waveform checks with high frequency circuit OFF .
F-41 F-41 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC .
F-42 F-42 PRECISION TIG 275 TROUBLESHOOTING & REP AIR 0V 5 ms 20V TYPICAL AC VOL T AGE W A VEFORM - MACHINE LOADED TO 2 AMPS AC - TIG MODE HIGH VOL T AGE/ HIGH FREQUENCY can damage test equipment. Perform all voltage and waveform checks with high frequency circuit OFF .
F-43 F-43 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR 0V 5 ms 20V This is the typical AC output voltage waveform generated from a properly operating machine.
F-44 F-44 PRECISION TIG 275 NOTES Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Maste.
F-45 F-45 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC .
F-46 F-46 PRECISION TIG 275 TROUBLESHOOTING & REP AIR HIGH VOL T AGE TRANSFORMER REMOV AL AND REPLACEMENT (continued) REMOV AL PROCEDURE 1. Remove input power to the TIG 275 machine. 2. Using the 3/8” nut driver , remove the case sides and top. 3.
F-47 F-47 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC .
F-48 NOTES F-48 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Maste.
F-49 F-49 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC .
F-50 F-50 PRECISION TIG 275 TROUBLESHOOTING & REP AIR CONTROL BOARD REMOV AL AND REPLACEMENT (continued) REMOV AL PROCEDURE 1. Remove input power to the TIG 275 machine. 2. Using a 3/8” nut driver , remove the two screws from the top of the case front.
F-51 F-51 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR CONTROL BOARD REMOV AL AND REPLACEMENT (continued) J12 J11 J10 J9 J8 J6 J5 J4 Figure F .
F-52 F-52 PRECISION TIG 275 NOTES Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Maste.
F-53 F-53 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC .
F-54 F-54 PRECISION TIG 275 TROUBLESHOOTING & REP AIR SCR BRIDGE ASSEMBL Y REMOV AL AND REPLACEMENT (continued) REMOV AL PROCEDURE 1. Remove input power to the TIG 275 machine. 2. Using the 3/8” nut driver , remove the case sides and top. 3. Label and cut leads G1 and G2.
F-55 F-55 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR SCR BRIDGE REMOV AL AND REPLACEMENT (continued) Negative LIFT BAIL STABILIZER 217 B G4 G3 G2 G1 Pos.
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC F-56 F-56 TROUBLESHOOTING & REP AIR MOUNTING OF STUD TYPE DIODES TO ALUMINUM HEA T SINKS (CONT’D) DIODE STUD SIZE 3/4 - 16 3/8 - 24 1/4 - 28 FOOT - POUNDS 25-27 10±.
F-57 F-57 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC .
F-58 F-58 PRECISION TIG 275 TROUBLESHOOTING & REP AIR POLARITY SWITCH REMOV AL AND REPLACEMENT (continued) REMOV AL PROCEDURE 1. Remove the input to the PRECISION TIG 275 machine. 2. Using the 3/8” nut driver , remove the case sides and top. 3. Locate the polarity switch.
F-59 F-59 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR SCR REMOV AL AND REPLACEMENT Service and repair should be performed by only Lincoln Electric factory trained personnel.
F-60 F-60 PRECISION TIG 275 TROUBLESHOOTING & REP AIR SCR REMOV AL AND REPLACEMENT (continued) SPECIAL INSTRUCTIONS NOTE: Before disassembling the existing recti- fier , note toward which heat sink the outer metal ring of the power SCR is mounted.
F-61 F-61 PRECISION TIG 275 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC .
F-62 NOTES PRECISION TIG 275 F-62 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Maste.
PRECISION TIG 275 Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ELECTRICAL DIAGRAMS G-1 G-1 Electrical Diagrams Section ..........................................................................................Section G Wiring Diagram (Entire Machine) Code 10806 (G4031) .
ELECTRICAL DIAGRAMS G-2 PRECISION TIG 275 ® ® WIRING DIAGRAM - ENTIRE MACHINE - CODE 10806 (G4031) RECEPTACLE C A B B CONTROL PC BOARD 10K A-B F E D C AT MINIMUM D F REMOTE TM AMPTROL OPTIONAL A E REMOTE A B C D E F + - G R G Y 5 4 3 2 1 (STICK) (AUTO BAL) (REMOTE) (P.
ELECTRICAL DIAGRAMS G-3 PRECISION TIG 275 ® ® WIRING DIAGRAM - ENTIRE MACHINE - CODE 10807 (G4031-1) RECEPTACLE C A B B CONTROL PC BOARD 10K A-B F E D C AT MINIMUM D F REMOTE TM AMPTROL OPTIONAL A E REMOTE A B C D E F + - G R G Y 5 4 3 2 1 (STICK) (AUTO BAL) (REMOTE) (P.
ELECTRICAL DIAGRAMS G-4 PRECISION TIG 275 ® ® WIRING DIAGRAM - ENTIRE MACHINE - CODE 10893 (G4031-2) RECEPTACLE C A B B CONTROL PC BOARD 10K A-B F E D C AT MINIMUM D F REMOTE TM AMPTROL OPTIONAL A E REMOTE A B C D E F + - G R G Y 5 4 3 2 1 (STICK) ( AUTO BAL) (REMOTE) (P.
ELECTRICAL DIAGRAMS G-5 PRECISION TIG 275 ® ® WIRING DIAGRAM - ENTIRE MACHINE - CODE 1 1 158 (G5692) RECEPTACLE C A B B 10K A-B F E D C MINIMUM D F TM AMPTROL A E REMOTE A B C D E F + - G R G Y 8 4 .
ELECTRICAL DIAGRAMS G-6 PRECISION TIG 275 ® ® WIRING DIAGRAM - ENTIRE MACHINE - CODE 1 1 159 (G5692-1) RECEPTACLE C A B B 10K A-B F E D C MINIMUM D F TM AMPTROL A E REMOTE A B C D E F + - G R G Y 8 .
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ELECTRICAL DIAGRAMS G-7 PREC.
ELECTRICAL DIAGRAMS G-8 PRECISION TIG 275 ® ® SCHEMA TIC - ENTIRE MACHINE - ABOVE CODE 1 1000 (G5691) EN-170 S O L ID E D G E ENGINEERING CONTROLLED MANUFACTURER: No RELEASED FROM X A.
ELECTRICAL DIAGRAMS G-9 PRECISION TIG 275 ® ® SCHEMA TIC - CONTROL PC BOARD - BELOW CODE 11000 (G3908 P AGE 1) G-9 NOTE: This diagram is for reference only .
ELECTRICAL DIAGRAMS G-10 PRECISION TIG 275 ® ® SCHEMA TIC - CONTROL PC BOARD - BELOW CODE 11000 (G3908 P AGE 2) G-10 NOTE: This diagram is for reference only .
ELECTRICAL DIAGRAMS G-11 PRECISION TIG 275 ® ® SCHEMA TIC - CONTROL PC BOARD - BELOW CODE 11000 (G3908 P AGE 3) G-11 NOTE: This diagram is for reference only .
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty . Individual Printed Circuit Board Components are not available from Lincoln Electric.
ELECTRICAL DIAGRAMS G-13 PRECISION TIG 275 ® ® SCHEMA TIC - CONTROL PC BOARD - ABOVE CODE 1 1000 (G4762 PAGE 1) G-13 NOTE: This diagram is for reference only .
ELECTRICAL DIAGRAMS G-14 PRECISION TIG 275 ® ® SCHEMA TIC - CONTROL PC BOARD - ABOVE CODE 1 1000 (G4762 PAGE 2) G-14 NOTE: This diagram is for reference only .
ELECTRICAL DIAGRAMS G-15 PRECISION TIG 275 ® ® SCHEMA TIC - CONTROL PC BOARD - ABOVE CODE 1 1000 (G4762 PAGE 3) G-15 NOTE: This diagram is for reference only .
ELECTRICAL DIAGRAMS G-16 PRECISION TIG 275 ® ® SCHEMA TIC - CONTROL PC BOARD - ABOVE CODE 1 1000 (G4762 PAGE 4) G-16 NOTE: This diagram is for reference only .
ELECTRICAL DIAGRAMS G-17 PRECISION TIG 275 ® ® SCHEMA TIC - CONTROL PC BOARD - ABOVE CODE 1 1000 (G4762 PAGE 5) G-17 NOTE: This diagram is for reference only .
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty . Individual Printed Circuit Board Components are not available from Lincoln Electric.
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty . Individual Printed Circuit Board Components are not available from Lincoln Electric.
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty . Individual Printed Circuit Board Components are not available from Lincoln Electric.
ELECTRICAL DIAGRAMS G-21 PRECISION TIG 275 ® ® SCHEMA TIC-BYPASS / ST ABILIZER P .C. BOARD (S22530-1) (CODE 10806 & 10807) 160J 320V TP1 600V .05 C8 5W 10 R1 250V 15 C9 600V .05 C6 600V .05 C7 600V .05 C5 600V .05 C2 600V .05 C3 600V .05 C4 600V .
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty . Individual Printed Circuit Board Components are not available from Lincoln Electric.
ELECTRICAL DIAGRAMS G-23 PRECISION TIG 275 ® ® SCHEMA TIC-BYPASS AND CE P . C. BOARD (S24206) (CODE 10893) VOLTAGE NET .0047 440V C2 .0047 440V C1 2.2 275V C4 2.2 275V C3 B1 FRAME GROUND 9/29/97 LINE 2 (V) LINE 1 (U) DIODES = FRAME CONNECTION ( CODE NUMBER.
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty . Individual Printed Circuit Board Components are not available from Lincoln Electric.
ELECTRICAL DIAGRAMS G-25 PRECISION TIG 275 ® ® SCHEMA TIC - TIG OPTION P .C. BOARD - BELOW CODE 11000 (G4039 P AGE 1) G-25 NOTE: This diagram is for reference only .
ELECTRICAL DIAGRAMS G-26 PRECISION TIG 275 ® ® SCHEMA TIC - TIG OPTION P .C. BOARD - BELOW CODE 11000 (G4039 P AGE 2) G-26 NOTE: This diagram is for reference only .
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty . Individual Printed Circuit Board Components are not available from Lincoln Electric.
ELECTRICAL DIAGRAMS G-28 PRECISION TIG 275 ® ® SCHEMA TIC - TIG OPTION P .C. BOARD - ABOVE CODE 1 1000 (G4760 PAGE 1) G-28 NOTE: This diagram is for reference only .
ELECTRICAL DIAGRAMS G-29 PRECISION TIG 275 ® ® SCHEMA TIC - TIG OPTION P .C. BOARD - ABOVE CODE 1 1000 (G4760 PAGE 2) G-29 NOTE: This diagram is for reference only .
ELECTRICAL DIAGRAMS G-30 PRECISION TIG 275 ® ® SCHEMA TIC - TIG OPTION P .C. BOARD - ABOVE CODE 1 1000 (G4760 PAGE 3) G-30 NOTE: This diagram is for reference only .
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty . Individual Printed Circuit Board Components are not available from Lincoln Electric.
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SVM ERROR REPORTING FORM We need to know if there are errors in our manuals. We also value any suggestions as to additional tests or procedures that would make this SVM a better tool for you.
An important point after buying a device Lincoln Electric PRECISION TIG 275 SVM162-B (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Lincoln Electric PRECISION TIG 275 SVM162-B yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Lincoln Electric PRECISION TIG 275 SVM162-B - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Lincoln Electric PRECISION TIG 275 SVM162-B you will learn all the available features of the product, as well as information on its operation. The information that you get Lincoln Electric PRECISION TIG 275 SVM162-B will certainly help you make a decision on the purchase.
If you already are a holder of Lincoln Electric PRECISION TIG 275 SVM162-B, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Lincoln Electric PRECISION TIG 275 SVM162-B.
However, one of the most important roles played by the user manual is to help in solving problems with Lincoln Electric PRECISION TIG 275 SVM162-B. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Lincoln Electric PRECISION TIG 275 SVM162-B along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
