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Lincoln Electric SVM169-A manual

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Table of contents for the manual

  • Page 1

    PRECISION TIG 185 SVM169-A July , 2006 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 pr oper installation . . . and thoughtful operation on your part. DO NOT INST ALL, OPERA TE OR REP AIR THIS EQUIPMENT WITHOUT READ- ING THIS MANUAL AND T[...]

  • Page 2

    Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC i SAFETY i PRECISION TIG 185 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. ____________________________________________________ 1.b. Operate engines in open,[...]

  • Page 3

    Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ii SAFETY ii PRECISION TIG 185 ARC RA YS can burn. 4.a. Use a shield with the proper filter and cover plates to protect your eyes from sparks and the rays of the arc when welding or observing open arc welding. Headshield and filter lens should conform to ANSI Z87. I[...]

  • Page 4

    PRECISION TIG 185 SAFETY iii iii Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC FOR ELECTRICALL Y powered equipment. 8.a. T urn off input power using the disconnect switch at the fuse box before working on the equipment. 8.b. Install equipment in accordance with the U.S. National Electrical Code, all local codes[...]

  • Page 5

    PRECISION TIG 185 SAFETY iv iv Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC PRÉCAUTIONS DE SÛRETÉ Pour votre propre protection lire et observer toutes les instructions et les précautions de sûreté specifiques qui parraissent dans ce manuel aussi bien que les précautions de sûreté générales suiv- ant[...]

  • Page 6

    PRECISION TIG 185 v v MASTER T ABLE OF CONTENTS FOR ALL SECTIONS Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i-iv Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section A Operation . . . . . . . . . . . . [...]

  • Page 7

    Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC PRECISION TIG 185 Section A-1 Section A-1 T ABLE OF CONTENTS - INST ALLA TION SECTION - Installation ..............................................................................................................Secti on A T echnical Specifications ..................[...]

  • Page 8

    PRECISION TIG 185 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-2 INST ALLA TION A-2 TECHNICAL SPECIFICA TIONS - PRECISION TIG 185 (K2345-1AND K2347-1,-2) V olts at Rated Amperes 15.2 V AC/DC 14.1 V AC/DC 13.8 V AC/DC 27.4[...]

  • Page 9

    PRECISION TIG 185 INST ALLA TION A-3 A-3 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 TECHNICAL SPECIFICA TIONS - CANADIAN (K2345-2), INTERNA TIONAL K2346-1) MODEL HEIGHT WIDTH DEPTH WEIGHT PHYSICAL DIMENSIONS (2) W eld V o[...]

  • Page 10

    PRECISION TIG 185 INST ALLA TION A-4 A-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 TOC SAFETY PRECAUTIONS SELECT SUIT ABLE LOCA TION Place the welder where clean cooling air can freely cir- culate in and out through the rear[...]

  • Page 11

    PRECISION TIG 185 INST ALLA TION A-5 A-5 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 The high frequency generator , being similar to a radio transmitter , may cause radio, TV and electronic equip- ment interference problem[...]

  • Page 12

    PRECISION TIG 185 INST ALLA TION A-6 A-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 INPUT RECONNECT PROCEDURE On multiple input voltage welders, be sure the machine is connected per the following instructions for the volt[...]

  • Page 13

    PRECISION TIG 185 INST ALLA TION A-7 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 to Master TOC AP T A-17 T wist-Mate TIG welding torch with cable and connector is supplied with the Ready-Pak Models and available for other models (Se[...]

  • Page 14

    PRECISION TIG 185 NOTES A-8 A-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[...]

  • Page 15

    Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC PRECISION TIG 185 Section B-1 Section B-1 T ABLE OF CONTENTS - OPERA TION SECTION - Operation ................................................................................................................Sectio n B Safety Precautions ..............................[...]

  • Page 16

    PRECISION TIG 185 OPERA TION B-2 B-2 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 cloth- ing. • Insulate yourself from work a[...]

  • Page 17

    PRECISION TIG 185 OPERA TION B-3 B-3 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 PRODUCT DESCRIPTION The Precision TIG 185 is a member of our field acclaimed Precision TIG family of industrial arc weld - ing power sources.[...]

  • Page 18

    PRECISION TIG 185 OPERA TION B-4 B-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 TOC CONTROL FUNCTIONALITY 1. POWER SWITCH – Input line switch turns input power ON or OFF , as indicated by the on or off sta- tus of the front[...]

  • Page 19

    PRECISION TIG 185 OPERA TION B-5 B-5 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 8. PULSE TIG CONTROL – The Pulse TIG feature built into the Precision TIG 185 is simplified to be a single knob control which sets the Puls[...]

  • Page 20

    PRECISION TIG 185 OPERA TION B-6 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 REMOTE CONTROL OPERA TION A Foot Amptrol ™is included with the PRECISION TIG 185 Ready-Pak models and availiable for other models (See Acce[...]

  • Page 21

    PRECISION TIG 185 OPERA TION B-7 B-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 to Master TOC WELDING IN STICK MODE 1. Put the electrode holder and cable quick connect plug into the electrode output receptacle. T urn clock- wise until [...]

  • Page 22

    PRECISION TIG 185 NOTES B-8 B-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[...]

  • Page 23

    Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC PRECISION TIG 185 Section C-1 Section C-1 T ABLE OF CONTENTS - ACCESSORIES SECTION - Accessories ............................................................................................................Section C Options / Accessories .............................[...]

  • Page 24

    PRECISION TIG 185 ACCESSORIES C-2 C-2 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 ACTOR Y INST ALLED OPTIONS The Precision TIG 185 will be available in two Factory- Configured Welding Packages: 1. Precision TIG 185 Ready[...]

  • Page 25

    PRECISION TIG 185 ACCESSORIES C-3 C-3 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 FIELD INST ALLED OPTIONS The following Options/Accessories are available for the Precision TIG 185: • K2348-1 Under-Storage Car t Includes[...]

  • Page 26

    PRECISION TIG 185 NOTES C-4 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 TOC[...]

  • Page 27

    Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC PRECISION TIG 185 Section D-1 Section D-1 T ABLE OF CONTENTS - MAINTENANCE SECTION - Maintenance ...........................................................................................................Section D Safety Precautions .................................[...]

  • Page 28

    PRECISION TIG 185 MAINTENANCE D-2 D-2 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 SAFETY PRECAUTIONS ELECTRIC SHOCK can kill. • Only qualified personnel should per- form this maintenance. • T urn the input power OFF at[...]

  • Page 29

    PRECISION TIG 185 MAINTENANCE D-3 D-3 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.2 — LOCA TION OF MAINTENANCE COMPONENTS. 1 9 5 8 8 3 6 2 4 7 1. Case Front Assembly 2. Case Back Assembly 3. Arc Starter & By[...]

  • Page 30

    X NOTES D-4 D-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 TOC[...]

  • Page 31

    Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC X Section E-1 Section E-1 Theory of Operation ...............................................................................................Section E General Description ...............................................................................................[...]

  • Page 32

    PRECISION TIG 185 THEOR Y OF OPERA TION E-2 E-2 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 INPUT POWER CIRCUIT The desired single-phase input power is connected to the TIG 185 through an input power switch located in the [...]

  • Page 33

    PRECISION TIG 185 THEOR Y OF OPERA TION E-3 E-3 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 AND FEEDBACK CONTROL The AC output from the main transformer secondary is rectified and controlled through t[...]

  • Page 34

    PRECISION TIG 185 THEOR Y OF OPERA TION E-4 E-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 TOC HIGH VOL T AGE / HIGH FREQUENCY CIRCUIT The control board passes the 1 15V AC voltage to the primary of the high voltage transform[...]

  • Page 35

    PRECISION TIG 185 THEOR Y OF OPERA TION E-5 E-5 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 WELDING OUTPUT When the polarity switch is placed in either DC position, the AC voltage from the main transformer secondary is [...]

  • Page 36

    PRECISION TIG 185 THEOR Y OF OPERA TION E-6 E-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 AC WELDING OUTPUT Rotating the polarity switch to the AC position changes the welding power circuit. One lead (X1) of the main tra[...]

  • Page 37

    PRECISION TIG 185 THEOR Y OF OPERA TION E-7 E-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 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. An[...]

  • Page 38

    PRECISION TIG 185 THEOR Y OF OPERA TION E-8 E-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 PROTECTIVE CIRCUITS Protective circuits are designed into the PRECISION TIG 185 to sense trouble and shut down the machine before [...]

  • Page 39

    Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC PRECISION TIG 185 Section F-1 Section F-1 T ABLE OF CONTENTS - TROUBLESHOOTING & REP AIR SECTION - Tr oubleshooting & Repair Section ........................................................................Section F How to Use T roubleshooting Guide .........[...]

  • Page 40

    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 PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-2 F-2 CAUTION This T roubleshooting Guide is pr ovided to help you locate and repair possible machine malfunctions. Simply follo[...]

  • Page 41

    PRECISION TIG 185 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 F-3 F-3 Sometimes machine failures appear to be due to PC board failures. These problems can sometimes be traced to poor electrica[...]

  • Page 42

    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 F-4 F-4 PRECISION TIG 185 CAUTION If for any reason you do not understand the test pr ocedures or ar e unable to perform the test/repairs safely , c[...]

  • Page 43

    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 F-5 F-5 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual. PRECISION TIG 185 CAUTION If for any reason you do[...]

  • Page 44

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-6 F-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 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual. CAUTION If for any reason you do[...]

  • Page 45

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-7 F-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 to Master TOC TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual. CAUTION If for any reason you do[...]

  • Page 46

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-8 F-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 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual. CAUTION If for any reason you do[...]

  • Page 47

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-9 F-9 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 GUIDE Observe Safety Guidelines detailed in the beginning of this manual. CAUTION If for any reason you do[...]

  • Page 48

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-10 F-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 Master TOC TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual. CAUTION If for any reason you [...]

  • Page 49

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-11 F-11 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 GUIDE Observe Safety Guidelines detailed in the beginning of this manual. CAUTION If for any reason you [...]

  • Page 50

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-12 F-12 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 GUIDE Observe Safety Guidelines detailed in the beginning of this manual. CAUTION If for any reason you [...]

  • Page 51

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-13 F-13 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 GUIDE Observe Safety Guidelines detailed in the beginning of this manual. CAUTION If for any reason you [...]

  • Page 52

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-14 F-14 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 GUIDE Observe Safety Guidelines detailed in the beginning of this manual. CAUTION If for any reason you [...]

  • Page 53

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-15 F-15 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 Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performe[...]

  • Page 54

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-16 F-16 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 PROCEDURE 1. Remove input power to the TIG185 machine. 2. Using the 3/8” nutdriver remove the right side panel. 3. Loc[...]

  • Page 55

    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 . For your safety and to avoid electrical shock, please observe all safety notes and pre- cautions detailed t[...]

  • Page 56

    PRECISION TIG 185 F-18 F-18 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 TRANSFORMER TEST (continued) TEST PROCEDURE 1. Remove main supply power to the machine. 2. Using the 3/8” nutdriver[...]

  • Page 57

    PRECISION TIG 185 F-19 F-19 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 TRANSFORMER TEST (continued) 6. If all of the secondary voltages are correct the T1 transformer is func- tioning prop[...]

  • Page 58

    PRECISION TIG 185 NOTES F-20 F-20 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[...]

  • Page 59

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-21 F-21 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 Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performe[...]

  • Page 60

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-22 F-22 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 TEST PROCEDURE 1. Remove main supply power to the TIG 185 and remove the case wrap- around cover . 2. Locate and remove [...]

  • Page 61

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-23 F-23 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. Using an analog ohmmeter test the resistance from anode to cathode of SCR1. Reverse the meter leads and check from ca[...]

  • Page 62

    PRECISION TIG 185 NOTES F-24 F-24 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[...]

  • Page 63

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-25 F-25 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 Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performe[...]

  • Page 64

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-26 F-26 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 TEST PROCEDURE 1. Remove main supply power to the TIG 185 machine. 2. Locate and remove plug J2 from the control board. [...]

  • Page 65

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-27 F-27 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 6. Connect SCR into the test circuit as shown (A) lead to anode (C) lead to cathode and (G) lead to the gate. 7. Close s[...]

  • Page 66

    PRECISION TIG 185 NOTES F-28 F-28 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[...]

  • Page 67

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-29 F-29 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 NORMAL OPEN CIRCUIT VOL T AGE W A VEFORM AC TIG MODE CAUTION HIGH VOL T AGE / HIGH FREQUENCY can damage test equipment. [...]

  • Page 68

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-30 F-30 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 NORMAL OPEN CIRCUIT VOL T AGE W A VEFORM DC TIG MODE CAUTION HIGH VOL T AGE / HIGH FREQUENCY can damage test equipment. [...]

  • Page 69

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-31 F-31 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 NORMAL OPEN CIRCUIT VOL T AGE W A VEFORM AC STICK MODE CAUTION HIGH VOL T AGE / HIGH FREQUENCY can damage test equipment[...]

  • Page 70

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-32 F-32 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 NORMAL OPEN CIRCUIT VOL T AGE W A VEFORM DC STICK MODE CAUTION HIGH VOL T AGE / HIGH FREQUENCY can damage test equipment[...]

  • Page 71

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-33 F-33 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 TYPICAL OUTPUT VOL T AGE W A VEFORM - MACHINE LOADED AC TIG MODE CAUTION HIGH VOL T AGE / HIGH FREQUENCY can damage test[...]

  • Page 72

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-34 F-34 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 TYPICAL OUTPUT VOL T AGE W A VEFORM - MACHINE LOADED DC TIG MODE CAUTION HIGH VOL T AGE / HIGH FREQUENCY can damage test[...]

  • Page 73

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-35 F-35 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 TYPICAL OUTPUT VOL T AGE W A VEFORM - MACHINE LOADED AC STICK MODE CAUTION HIGH VOL T AGE / HIGH FREQUENCY can damage te[...]

  • Page 74

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-36 F-36 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 TYPICAL OUTPUT VOL T AGE W A VEFORM - MACHINE LOADED DC STICK MODE CAUTION HIGH VOL T AGE / HIGH FREQUENCY can damage te[...]

  • Page 75

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-37 F-37 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 ABNORMAL OPEN CIRCUIT VOL T AGE - DC TIG MODE ONE OUTPUT SCR NOT FUNCTIONING CAUTION HIGH VOL T AGE / HIGH FREQUENCY can[...]

  • Page 76

    PRECISION TIG 185 NOTES F-38 F-38 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[...]

  • Page 77

    PRECISION TIG 185 F-39 F-39 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 AND REP AIR Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed [...]

  • Page 78

    PRECISION TIG 185 F-40 F-40 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 AND REP AIR SCR BRIDGE ASSEMBL Y REMOV AL AND REPLACEMENT PROCEDURE (Continued) PROCEDURE 1. Remove input power to the TIG 185 machine[...]

  • Page 79

    PRECISION TIG 185 F-41 F-41 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 AND REP AIR SCR BRIDGE ASSEMBL Y REMOV AL AND REPLACEMENT PROCEDURE (Continued) 9. Remove plug J2 from the control board. (See Figure [...]

  • Page 80

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-42 F-42 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 BRIDGE ASSEMBL Y REMOV AL AND REPLACEMENT PROCEDURE (Continued) FIGURE F .9 PLUG J2 ON CONTROL BOARD PLUG J2 REMOVED[...]

  • Page 81

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-43 F-43 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 BRIDGE ASSEMBL Y REMOV AL AND REPLACEMENT PROCEDURE (Continued) 16. With the 3/8” wrench remove the four mounting [...]

  • Page 82

    PRECISION TIG 185 NOTES F-44 F-44 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[...]

  • Page 83

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-45 F-45 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 Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performe[...]

  • Page 84

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-46 F-46 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 POLARITY SWITCH REMOV AL AND REPLACEMENT PROCEDURE (Continued) REMOV AL PROCEDURE 1. Remove the input power to the TIG 1[...]

  • Page 85

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-47 F-47 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 POLARITY SWITCH REMOV AL AND REPLACEMENT PROCEDURE (Continued) REPLACEMENT PROCEDURE 1. Carefully position the new polar[...]

  • Page 86

    PRECISION TIG 185 NOTES F-48 F-48 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[...]

  • Page 87

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-49 F-49 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 Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performe[...]

  • Page 88

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-50 F-50 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 REMOV AL PROCEDURE 1. Remove input power to the TIG 185 machine. 2. Using the 3/8” nutdriver remove the case wrap-arou[...]

  • Page 89

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-51 F-51 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 HIGH VOL T AGE TRANSFORMER REMOV AL AND REPLACEMENT PROCEDURE (Continued) REPLACEMENT PROCEDURE 1. Carefully position th[...]

  • Page 90

    PRECISION TIG 185 NOTES F-52 F-52 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[...]

  • Page 91

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-53 F-53 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 Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performe[...]

  • Page 92

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-54 F-54 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 MAIN TRANSFORMER AND OUTPUT CHOKE ASSEMBL Y REMOV AL AND REPLACEMENT PROCEDURE (Continued) REMOV AL PROCEDURE 1. Remove [...]

  • Page 93

    PRECISION TIG 185 TROUBLESHOOTING & REP AIR F-55 F-55 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 MAIN TRANSFORMER AND OUTPUT CHOKE ASSEMBL Y REMOV AL AND REPLACEMENT PROCEDURE (Continued) REPLACEMENT PROCEDURE 1. Posi[...]

  • Page 94

    PRECISION TIG 185 NOTES F-56 F-56 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[...]

  • Page 95

    PRECISION TIG 185 TROUBLESHOOTING AND REP AIR F-57 F-57 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 RETEST AFTER REP AIR Should a machine under test be rejected for any reason requiring the removal of any mechanical part t[...]

  • Page 96

    PRECISION TIG 185 NOTES F-58 F-58 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[...]

  • Page 97

    Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC PRECISION TIG 185 Section G-1 Section G-1 T ABLE OF CONTENTS - ELECTRICAL DIAGRAMS SECTION - Electrical Diagrams ...............................................................................................Section G Wiring Diagram (G4549) . . . . . . . . . . . . .[...]

  • Page 98

    ELECTRICAL DIAGRAMS G-2 PRECISION TIG 185 WIRING DIAGRAM - ENTIRE MACHINE - (G4549) G4549 B SCR4 SCR2 SCR1 D C B A REAR GANG L1 ELECTRODE T3 NC NO MICRO-SWITCH T2 L2 L3 C3 SCR3 H1 H G 311A 312A OPEN CL OSED CL OSED G4 216 G3 2 1 8 G2 G1 217 220 AC E F PC BOARD CONTROL PC BOARD D1 S2 SV1 GAS VALVE S2 A BYPASS/ STABILIZER H1 X1 X2 R 222 W 221 WORK R2[...]

  • Page 99

    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-3 PRECISION TIG 185 SCHEMA TIC - ENTIRE MACHINE - (G4588) EN-170 S O L ID E D G E ENGINEERING CONTROLLED MANUFACTURER: No RELEASED FROM X A.02 G4588 Precisi[...]

  • Page 100

    ELECTRICAL DIAGRAMS G-4 PRECISION TIG 185 SCHEMA TIC - CONTROL PC BOARD - (G4550-1B4-1) G-4 NOTE: This diagram is for reference only . It may not be accurate for all machines covered by 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 [...]

  • Page 101

    ELECTRICAL DIAGRAMS G-5 PRECISION TIG 185 SCHEMA TIC - CONTROL P .C. BOARD - (G4550-1B4-2) G-5 NOTE: This diagram is for reference only . It may not be accurate for all machines covered by 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 T[...]

  • Page 102

    ELECTRICAL DIAGRAMS G-6 PRECISION TIG 185 SCHEMA TIC - CONTROL P .C. BOARD - (G4550-1B4-3) G-6 NOTE: This diagram is for reference only . It may not be accurate for all machines covered by 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 T[...]

  • Page 103

    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. This information is pro- vided for reference only . Lincoln Electric discourages board level troub[...]

  • Page 104

    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. If you discover new or different “Problems or Symptoms” that are not covered in the three col- umn troubleshooting chart, please share this information wi[...]