Instruction/ maintenance manual of the product SQUARE WAVE TIG 255 SVM100-A Lincoln Electric
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SQU ARE W A VE TIG 255 SER VICE MANUAL Sales and Service through Subsidiaries and Distributors Worldwide 22801 St. Clair Ave. Cleveland, Ohio 44117-1199 U.
i SAFETY SQUARE WAVE TIG 255 PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH. KEEP CHILDREN AWAY. PACEMAKER WEARERS SHOULD CONSULT WITH THEIR DOCTOR BEFORE OPERATING.
ii SQUARE WAVE TIG 255 SAFETY FOR ELECTRICALL Y powered equipment. 6.a. Turn off input power using the disconnect switch at the fuse box before working on the equipment. 6.b. Install equipment in accordance with the U.S. National Electrical Code, all local codes and the manufacturer’s recommendations.
iii SAFETY SQUARE WAVE TIG 255 Mar. ‘93 ELECTRIC AND MAGNETIC FIELDS may be dangerous 8.a. Electric current flowing through any conductor causes localized Electric and Magnetic Fields (EMF). Welding current creates EMF fields around welding cables and welding machines 8.
iv SAFETY SQUARE WAVE TIG 255 PRÉCAUTIONS DE SÛRETÉ Pour votre propre protection lire et observer toutes les instruc- tions et les précautions de sûreté specifiques qui parraissent dans ce manuel aussi bien que les précautions de sûreté générales suivantes: Sûreté Pour Soudage A L’Arc 1.
MASTER T ABLE OF CONTENTS FOR ALL SECTIONS Page Safety .........................................................................................................................i-iv Installation .........................................................
Installation .......................................................................................................Section A Technical Specifications ........................................................................................A-1 Input and Output Specifications Cable and Fuse Sizes Physical Dimensions Location .
A-1 INST ALLA TION SQUARE WAVE TIG 255 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 .
A-2 INST ALLA TION SQUARE WAVE TIG 255 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 Read entire installation section before starting installation.
A-3 INST ALLA TION SQUARE WAVE TIG 255 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 4. Keep the torch in good repair and all connections tight to reduce high frequency leakage.
A-4 INST ALLA TION SQUARE WAVE TIG 255 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 .
A-5 INST ALLA TION SQUARE WAVE TIG 255 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 DO NOT operate a water-cooled torch unless water is flowing.
Operation ..........................................................................................................Section B Safety Precautions .................................................................................................B-1 Graphic Symbols .
B-1 OPERA TION SQUARE WAVE TIG 255 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 ELECTRIC SHOCK can kill. • Do not touch electrically live parts or electrode with skin or wet clothing.
B-2 OPERA TION SQUARE WAVE TIG 255 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 Mast.
B-3 OPERA TION SQUARE WAVE TIG 255 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 Mast.
B-4 OPERA TION SQUARE WAVE TIG 255 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 • Welding current limit can be preset from 5 to 315 amps and is displayed on the Ammeter when not welding.
B-5 OPERA TION SQUARE WAVE TIG 255 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 • Strain relief holes in base for welding cables, gas and water hoses and control cables.
B-6 OPERA TION SQUARE WAVE TIG 255 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 4. AC WAVE BALANCE: These keys are active in the AC TIG mode only.
B-7 OPERA TION SQUARE WAVE TIG 255 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 A. AC/DC INDICATOR: This symbol represents the output polarity of the 255 .
B-8 OPERA TION SQUARE WAVE TIG 255 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 TABLE B.
B-9 OPERA TION SQUARE WAVE TIG 255 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 5. Select Continuous High Frequency if welding with AC polarity, or Start Only High Frequency if welding with DC- polarity.
B-10 OPERA TION SQUARE WAVE TIG 255 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 5. Select Continuous High Frequency if welding with AC polarity, or Start Only High Frequency if welding with DC- polarity.
B-1 1 OPERA TION SQUARE WAVE TIG 255 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 Up/Down. Adjustment of the pulses per second (pulse frequency), allows for control of the heat input into the work piece.
B-12 OPERA TION SQUARE WAVE TIG 255 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 Mas.
B-13 NOTES SQUARE WAVE TIG 255 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 T.
SQUARE WAVE TIG 255 Accessories ......................................................................................................Section C Available Option and Accessories .........................................................................C-1 Undercarriage Function .
C-1 ACCESSORIES SQUARE WAVE TIG 255 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 Mas.
Maintenance .....................................................................................................Section D Safety Precautions .................................................................................................D-1 Routine and Periodic Maintenance .
D-1 MAINTENANCE SQUARE WAVE TIG 255 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 ELECTRIC SHOCK can kill. • Only qualified personnel should perform this maintenance.
D-2 MAINTENANCE SQUARE WAVE TIG 255 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 D.1 - GENERAL ASSEMBLY EXPLODED VIEW 1, MAIN TRANSFORMER 5.
D-3 NOTES SQUARE WAVE TIG 255 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 TO.
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SQUARE WAVE TIG 255 Theory of Operation Section ...........................................................................Section E Power Supply Operation ...........
SQUARE WAVE TIG 255 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 E-1 THEO.
SQUARE WAVE TIG 255 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 E-2 THEO.
SQUARE WAVE TIG 255 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 E-3 THEO.
SQUARE WAVE TIG 255 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 E-4 THEO.
SQUARE WAVE TIG 255 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 E-5 THEO.
SQUARE WAVE TIG 255 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 E-6 THEOR Y OF OPERA TION A silicon controlled rectifier (SCR) is a three terminal device used to control rather large currents to a load.
SQUARE WAVE TIG 255 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 E-7 THEOR Y OF OPERA TION A thermostat protects the machine from excessive operating temperatures.
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SQUARE WAVE TIG 255 Troubleshooting & Repair Section ................................................................Section F Safety Precautions .................
SQUARE WAVE TIG 255 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-1 TROUBLESHOOTING & REP AIR This Troubleshooting Guide is provided to help you locate and repair possible machine malfunctions.
SQUARE WAVE TIG 255 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-2 TROUBLESHOOTING & REP AIR CAUTION: Sometimes machine failures appear to be due to PC board failures.
SQUARE WAVE TIG 255 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-3 TROUBLESHOOTING & REP AIR TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
SQUARE WAVE TIG 255 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-4 TROUBLESHOOTING & REP AIR Observe Safety Guidelines detailed in the beginning of this manual.
SQUARE WAVE TIG 255 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-5 TROUBLESHOOTING & REP AIR TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
SQUARE WAVE TIG 255 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-6 TROUBLESHOOTING & REP AIR Observe Safety Guidelines detailed in the beginning of this manual.
SQUARE WAVE TIG 255 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-7 TROUBLESHOOTING & REP AIR TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
SQUARE WAVE TIG 255 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-8 TROUBLESHOOTING & REP AIR Observe Safety Guidelines detailed in the beginning of this manual.
SQUARE WAVE TIG 255 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-9 TROUBLESHOOTING & REP AIR TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
SQUARE WAVE TIG 255 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-10 TROUBLESHOOTING & REP AIR Observe Safety Guidelines detailed in the beginning of this manual.
SQUARE WAVE TIG 255 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-1 1 TROUBLESHOOTING & REP AIR TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
SQUARE WAVE TIG 255 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-12 TROUBLESHOOTING & REP AIR Observe Safety Guidelines detailed in the beginning of this manual.
SQUARE WAVE TIG 255 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-13 TROUBLESHOOTING & REP AIR TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
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 SQUARE WAVE TIG 255 F-14 TROUBLESHOOTING & REP AIR Observe Safety Guidelines detailed in the beginning of this manual.
SQUARE WAVE TIG 255 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-15 TROUBLESHOOTING & REP AIR TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual.
SQUARE WAVE TIG 255 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-16 TRO.
SQUARE WAVE TIG 255 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-17 TRO.
SQUARE WAVE TIG 255 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-18 TRO.
SQUARE WAVE TIG 255 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-19 TRO.
SQUARE WAVE TIG 255 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-20 TROUBLESHOOTING & REP AIR PROTECTION/SNUBBER BOARD CONTINUITY TEST TEST DESCRIPTION Many circuits pass through the protection/snubber board.
SQUARE WAVE TIG 255 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 TRO.
SQUARE WAVE TIG 255 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-22 TRO.
SQUARE WAVE TIG 255 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 TRO.
SQUARE WAVE TIG 255 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 TRO.
SQUARE WAVE TIG 255 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-25 TROUBLESHOOTING & REP AIR ARC ST ART TRIGGER CIRCUIT TEST (continued) PROTECTION/SNUBBER L9255 J10 J11 J12 J13 J14 J15 10J12 3J12 3J13 11J13 6.
SQUARE WAVE TIG 255 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-26 TROUBLESHOOTING & REP AIR ST A TIC SCR TEST TEST DESCRIPTION The Static SCR Test is a quick check to determine if an SCR is shorted or “leaky”.
SQUARE WAVE TIG 255 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-27 TRO.
SQUARE WAVE TIG 255 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-28 TRO.
SQUARE WAVE TIG 255 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-29 TRO.
SQUARE WAVE TIG 255 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 TRO.
SQUARE WAVE TIG 255 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-31 TROUBLESHOOTING & REP AIR NORMAL OPEN CIRCUIT VOL T AGE W A VEFORM DC STICK MODE CAUTION HIGH VOL T AGE / HIGH FREQUENCY can damage test equipment.
SQUARE WAVE TIG 255 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-32 TROUBLESHOOTING & REP AIR NORMAL OPEN CIRCUIT VOL T AGE W A VEFORM AC STICK MODE CAUTION HIGH VOL T AGE / HIGH FREQUENCY can damage test equipment.
SQUARE WAVE TIG 255 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-33 TROUBLESHOOTING & REP AIR NORMAL OPEN CIRCUIT VOL T AGE W A VEFORM DC TIG MODE CAUTION HIGH VOL T AGE / HIGH FREQUENCY can damage test equipment.
SQUARE WAVE TIG 255 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-34 TROUBLESHOOTING & REP AIR NORMAL OPEN CIRCUIT VOL T AGE W A VEFORM AC TIG MODE CAUTION HIGH VOL T AGE / HIGH FREQUENCY can damage test equipment.
SQUARE WAVE TIG 255 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-35 TRO.
SQUARE WAVE TIG 255 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-36 TRO.
SQUARE WAVE TIG 255 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-37 TROUBLESHOOTING & REP AIR TYPICAL SCR GA TE VOL T AGE W A VEFORM CAUTION HIGH VOL T AGE / HIGH FREQUENCY can damage test equipment.
SQUARE WAVE TIG 255 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-38 TRO.
SQUARE WAVE TIG 255 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-39 TRO.
SQUARE WAVE TIG 255 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-40 TRO.
SQUARE WAVE TIG 255 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-41 TROUBLESHOOTING & REP AIR F AN MOTOR AND BLADE REMOV AL (continued) TEST PROCEDURE 1.
SQUARE WAVE TIG 255 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 TRO.
SQUARE WAVE TIG 255 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-43 TROUBLESHOOTING & REP AIR SCR HEA T SINK ASSEMBL Y REMOV AL (continued) TEST PROCEDURE 1.
11 / 94 SQUARE WAVE TIG 255 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 .
SQUARE WAVE TIG 255 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-45 TRO.
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SQUARE WAVE TIG 255 Electrical Diagrams .........................................................................................Section G Control PC Board (G2150) Components .
G-2 ELECTRICAL DIAGRAMS SQUARE WAVE TIG 255 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 NOTE: Lincoln Electric assumes no responsibility for liabilities resulting from board level troubleshooting.
G-3 ELECTRICAL DIAGRAMS SQUARE WAVE TIG 255 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 NOTE: Lincoln Electric assumes no responsibility for liabilities resulting from board level troubleshooting.
G-4 ELECTRICAL DIAGRAMS SQUARE WAVE TIG 255 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 X19 IC-UNDERVOLTAGE-SENSING,RESET, MCU X10 IC-CMOS,INVERTER,SCHMITT, HEX,HC14A C65,C66 CAPACITOR-TAEL,4.
G-5 NOTES SQUARE WAVE TIG 255 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 TO.
G-6 SQUARE WAVE TIG 255 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 NOTE: Lincoln Electric assumes no responsibility for liabilities resulting from board level troubleshooting.
G-7 SQUARE WAVE TIG 255 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 NOTE: Lincoln Electric assumes no responsibility for liabilities resulting from board level troubleshooting.
G-8 NOTES SQUARE WAVE TIG 255 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 TO.
G-9 ELECTRICAL DIAGRAMS SQUARE W AVE TIG 255 231 TO GROUND PER NATIONAL ELECTRIC CODE 229 PIEZO BUZZER (+) (-) C1 (1,3) (1,2) (1,1) (2,2) (2,1) (3,1) (4,1) (4,2) (5,1) (5,2) TO KEYPAD MATRIX X1 240 230 230D 230B 50/60 HZ 237 238 236A C2 232 230C MACHINES ONLY 230E 236 235 232B 229A 239A 239 235A 238A R3 R4 52A CLEVELAND, OHIO U.
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC G-10 ELECTRICAL DIAGRAMS .
G-11 ELECTRICAL DIAGRAMS SQUARE W AVE TIG 255 CONTROL BOARD SCHEMA TIC — SQUARE W A VE TIG 255 (G2150) D46 100 R14 1.00K R113 +15V IOGND J5 1 SCR GATE 100V 1A Q6 J5 3 J8 11 16VAC AUX SCR3 AUX SCR3 windings ) ( 1 of 5 XFMR secondary J8 5 SCR CATHODE 1.
G-12 ELECTRICAL DIAGRAMS SQUARE W AVE TIG 255 CONTROL BOARD SCHEMA TIC — SQUARE W A VE TIG 255 (cont’d) (G2150) N+5V LGND ROW 5 130 8.0MHz Y1 1.00M R71 1K R87 100V 22p C22 4.75K R81 4.75K R210 1.0 35V C23 C20 GND RES IN X19 50V 0.1 C33 C5 J6 10 +15V 475 R83 D39 D34 IOGND 18 15V C16 D7 L+5V J6 11 J6 3 D0-D7 D4 D6 C25 D5 D0 1K R84 D3 X32 4 1.
G-13 ELECTRICAL DIAGRAMS SQUARE W AVE TIG 255 PROTECTION/SNUBBER BOARD SCHEMA TIC — SQUARE W A VE TIG 255 (L9255) A NOTE: Lincoln Electric assumes no responsibility for liabilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty .
G-14 ELECTRICAL DIAGRAMS SQUARE W AVE TIG 255 KEYP AD LED BOARD — SQUARE W A VE TIG 255 (L9212) NOTE: Lincoln Electric assumes no responsibility for liabilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty .
An important point after buying a device Lincoln Electric SQUARE WAVE TIG 255 SVM100-A (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 SQUARE WAVE TIG 255 SVM100-A 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 SQUARE WAVE TIG 255 SVM100-A - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Lincoln Electric SQUARE WAVE TIG 255 SVM100-A you will learn all the available features of the product, as well as information on its operation. The information that you get Lincoln Electric SQUARE WAVE TIG 255 SVM100-A will certainly help you make a decision on the purchase.
If you already are a holder of Lincoln Electric SQUARE WAVE TIG 255 SVM100-A, 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 SQUARE WAVE TIG 255 SVM100-A.
However, one of the most important roles played by the user manual is to help in solving problems with Lincoln Electric SQUARE WAVE TIG 255 SVM100-A. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Lincoln Electric SQUARE WAVE TIG 255 SVM100-A 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
