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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 troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to the

machine.

ELECTRICAL DIAGRAMS

G-18

PRECISION TIG 375

PC BOARD ASSEMBLY - CONTROL PC BOARD - ABOVE CODE 11000 (G4763-1)

G4763-1

PRECISION TIG

CONTROL P.C. BOARD ASSEMBLY

1:1

G3909

JB

TNguyen                                                                                                    

-

UNLESS OTHERWISE SPECIFIED TOLERANCE

MANUFACTURING TOLERANCE PER E2056

ON 2 PLACE DECIMALS IS ± .02

ON 3 PLACE DECIMALS IS ± .002

ON ALL ANGLES IS ± .5 OF A DEGREE

WITH PUBLISHED STANDARDS.

MATERIAL TOLERANCE ("  ") TO AGREE

t

DO NOT SCALE THIS DRAWING

DRAWN BY:

DESIGN INFORMATION

ENGINEER:

APPROVED:

REFERENCE:

EQUIPMENT TYPE:
SUBJECT:

SCALE:

G47

63

-1

MATERIAL

DISPOSITION:

APPROVAL

DATE:

PROJECT

NUMBER:

NA

CRM38261

1

PAGE ___ OF ___

1

ENGINEERING CONTROLLED

MANUFACTURER:

No

DOCUMENT

NUMBER:

DOCUMENT

REVISION:

THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OWNED BY LINCOLN GLOBAL, INC. AND MAY NOT BE DUPLICATED, COMMUNICATED

TO OTHER PARTIES OR USED FOR ANY PURPOSE WITHOUT THE EXPRESS WRITTEN PERMISSION OF LINCOLN GLOBAL, INC.

PROPRIETARY & CONFIDENTIAL:

A

7-27-2007

RELEASED FROM X A.02

CHANGE DETAIL:

STRP

NOTES:

N.A.

 

CAUTION: 

THIS DEVICE IS SUBJECT TO DAMAGE BY STATIC ELECTRICITY.  SEE E2454 

BEFORE HANDLING. 

N.B.  KEEP THIS AREA FREE OF ENCAPSULATION MATERIAL (

‡

.50 MIN.) BOTH SIDES OF 

 

BOARD. 

N.C.  SQUEEZE COMPONENTS TOGETHER BEFORE APPLYING 

ITEM 7

 AND / OR  

 

ENCAPSULATION MATERIAL. 

N.D. APPLY 

ITEM 7

 ON COMPONENT SIDE ONLY, AS SHOWN.

 

N.E. APPLY 

ITEM 7

 ON BOTH SIDES OF BOARD AS SHOWN, EXCEPT TOP SURFACE OF 

TRIMMER. MAXIMUM 

ITEM 7

 HEIGHT NEAR CONNECTOR J2 IS .50 INCHES. 

N.F.  KEEP TOP SURFACE FREE OF ENCAPSULATION MATERIAL INCLUDING RTV.  

N.G.  PROGRAM X20 WITH 

ITEM 8

 AND LABEL X20 WITH PART NO. OF 

ITEM 8.

 

N.H.  PROGRAM X21 WITH 

ITEM 9

 AND LABEL X21 WITH PART NO. OF 

ITEM 9.

 

N.J.  COVER WITH TAPE AFTER PROGRAMMING. 

N.K.  APPLY 

ITEM 7

 ON COMPONENT SIDE ONLY, AS SHOWN. MAXIMUM 

ITEM 7

 HEIGHT IS .50 

INCHES. 

N.L.  APPLY 

ITEM 7

 TO CONNECTOR’S PLASTIC MOUNTING PINS ON NON-COMPONENT SIDE. 

 

UNLESS OTHERWISE SPECIFIED:

CAPACITANCE = MFD/VOLTS

INDUCTANCE = HENRIES

RESISTANCE = OHMS

6

N.F.

N.A.

N.A.

N.A.

N.A.

N.A.

N.A.

N.A.

N.C.

X

X

X

N.C., N.D.

XXXX

N.C., N.D.

X

X

X

X

N.C., N.D.

X

X

X

X

X

X

X

X
X

X

X

X

X

X

X

X

X

X

X

X

X

X

XXX

N.D.

N.D.

N.B.

X

X

X

X

X

X

X

X

X

X

X

X

X

X

N.K.

N.E.

N.D.

XXX

XXX

XXXX

X

XXXXXXXXX

XXXX

X

X

X

X

X

X

X

X

X

N.C.,N.D.

N.C.,N.D.

1

N.D.

N.F.

N.C.

N.C.

XXXX

N.D.

N.C., N.D.

X X X X X X

X X X X

X X X X

X X X X

X X X X

X X X X

X X X X X

X X

X X X

X X X X X X X

X X X X X X

X X

X X X X X X

X X

X X

X X

X X

X X

X X X X

X X X X X

X

X

X

X

X

X

X

X

X

X

X X

X

X

X

X

X

X

X

X

X

X

X X

X X

0

.20

6.00

12.00

17.80

1.20

10.68

16.80

N.F.

N.F.

FOR PARTS ORDERS:

INCLUDE (1) S25597PRINT PARTS ORDERS

INSTRUCTION SHEET.

PRECISION TIG CONTROL

G4763-1

J3

R1

55

R377

C1

17

R24

R3

71

C1

42

R400

C5

2

D6

6

R3

31

R51

R25

Q22

R248

C46

DZ26

C1

33

R398

R1

47

C135

O

CI

8

R159

C163

X1

4

C106

R119

C141

Q11

R3

50

R177

R2

37

R1

88

R116

R2

97

C1

45

R1

97

C79

R2

82

R3

08

R252

R421

DZ

23

R17

R179

DZ1

OCI6

R3

42

C1

24

R180

R263

DZ

8

R66

R2

24

X4

D12

R1

37

Q10

X1

9

X1

1

R52

R335

DZ

7

R1

54

R1

78

R3

56

R3

43

R176

R129

R59

OCI1

DZ

18

D48

R101

R112

R202

R15

TP7

R2

53

C1

13

C70

R2

35

D7

1

C1

32

Q

16

C57

R321

R216

C96

R277

C151

X5

R295

R38

R102

R173

C97

R1

96

C175

R1

72

Q

24

C1

47

C178

R369

R368

R2

31

R136

C165

R131

R3

R1

56

C8

R372

R261

C1

60

D83

R311

D55

R273

R164

R3

28

R203

R385

D6

8

D95

C60

R215

X2

TR

I1

R13

R3

62

R1

81

R3

37

R366

R2

22

R420

R1

52

R14

Q7

R367

J7

R389

R247

R1

94

C112

R408

R47

C6

X1

7

C69

R2

86

C123

OCI7

R104

Q18

O

CI

3

D62

X2

1

R275

R3

47

R305

C20

R409

C150

D40

R91

R1

84

R1

92

C24

R139

R1

53

R1

91

R2

94

C6

7

D8

4

C74

R2

27

R18

R279

R1

46

R57

Q

12

C1

49

R55

R3

10

C92

C1

46

R2

30

C2

6

D64

R2

81

R1

38

R7

C1

30

R392

R312

R6

C2

R376

R58

C143

DZ

19

R43

R2

39

D10

R358

C44

DZ27

R1

85

DZ6

R3

44

C171

R402

R1

41

R214

R387

R3

03

R103

C17

C105

R269

C8

8

C1

22

R1

45

C72

C53

J4

C1

18

R3

49

C1

52

D8

6

Q

29

C121

C86

TP

2

R166

R45

X1

3

Q23

R3

22

C1

59

D94

R381

DZ

15

D87

C19

D5

0

R264

C1

55

R2

28

R3

46

R211

C1

53

D36

R384

R260

R4

6

R3

07

C91

R244

C37

R249

C89

R410

TP10

J12

C8

7

DZ25

R1

98

R317

D93

R357

R3

39

D65

C25

C84

R395

C1

04

R266

R2

96

C1

58

R3

41

D21

C32

DZ

13

R1

68

R2

25

D6

9

R40

R412

DZ28

C156

Q2

C1

29

R39

TP9

R76

R270

D38

D91

R306

R213

R304

R134

R406

R3

33

R9

DZ

20

D8

5

R246

D20

C16

R1

86

C1

39

TP11

R54

C99

C1

16

DZ

14

R2

41

C1

15

C1

38

D7

9

R1

50

R318

C51

R92

R3

29

R160

R3

00

R3

38

R140

R78

Q5

C177

D37

R1

71

R2

01

R3

19

L1

D58

R3

79

D8

0

C78

DZ9

R373

C71

R413

TR

I4

C56

D82

D19

R133

R175

R2

38

DZ17

DZ24

C1

01

R1

87

R49

R418

C119

J6

C144

C76

Q19

R42

R3

52

R209

C172

R2

21

D49

DZ

29

R163

R3

82

T2

D59

R29

R259

Q17

R374

O

CI

4

R127

TP6

R274

R2

17

R265

C82

R170

C103

Q1

R3

64

R3

48

C134

Q

26

C98

R111

R110

R3

25

J5A

C1

37

C42

Q

28

D2

5

D13

J13

R1

83

R3

34

Q6

R1

99

D26

R2

36

D7

3

TP5

R165

D11

R122

R276

C50

R292

R313

C85

R3

20

R2

26

C102

C1

48

R3

80

D17

R21

R48

R162

D92

R1

89

J14

R1

82

D39

R416

R212

C1

D7

2

R336

D2

R407

C2

2

R77

C59

D89

C9

0

TP

1

C1

40

R419

C21

C75

R2

00

C1

00

C58

R417

R405

TP4

R3

32

TR

I3

J11

J2

T1

D7

X1

DZ4

C35

R2

23

R375

R280

R124

R2

29

DZ

16

X1

2

DZ3

R73

D35

R3

23

C6

6

R1

49

TP

3

D60

O

CI

2

R2

X2

0

D96

C1

61

R388

C1

28

R125

C6

8

R278

R2

89

R79

C62

D28

R4

TP12

R351

R132

C41

D42

Q3

TP

8

R2

43

C18

R44

L2

R2

99

C83

R411

R404

C81

R1

48

D16

C1

69

D1

4

C80

R3

63

R3

09

D1

C1

70

R1

42

C73

C167

R67

D46

R117

C173

R2

07

C36

D67

C168

C176

D61

R386

C157

X8

C1

62

R291

D81

R245

R401

X9

DZ

12

R41

R9

8

R1

95

R85

Q27

R3

78

D47

R2

67

C10

R1

43

R2

68

R394

R126

C1

54

R2

50

R3

45

D51

C1

31

R128

R9

7

R118

R50

R2

19

C125

R108

R53

J5

DZ10

R403

R2

40

R2

32

R391

J8

D22

R167

R2

33

R316

X1

6

D9

0

Q21

R1

51

C28

R100

R314

C9

R205

R130

R204

R2

54

R87

R56

R19

R365

R83

R423

R1

44

R415

R1

90

R293

R3

53

R396

R20

D63

C7

R3

02

DZ5

R390

R109

R422

C6

5

R251

R414

R2

34

R2

42

R5

R2

20

C179

R158

C23

R123

R3

30

C38

O

CI

5

D41

Q

13

R2

87

C1

5

R72

C11

Q20

R361

Q4

C61

R74

D1

8

D54

R161

R210

C5

R272

C14

R1

93

R2

88

C120

TR

I2

R2

98

R169

R315

J9

R2

06

C77

R3

01

R22

Q25

R3

40

D7

0

R84

R2

62

D31

R75

C107

R271

C1

36

R8

R359

C27

R16

C1

14

R120

R218

R383

R135

R121

C9

5

J10

0

.20

5.80

6.00

18.00

ALL COMPONENTS AND MATERIALS USED IN THIS

ASSEMBLY ARE TO BE RoHS COMPLIANT PER E4253

REVISION CONTROL

G4763-1A1

PART NO. IDENTIFICATION

CODE

TEST PER

COAT WITH E1844 AND E3668

SCHEMATIC REFERENCE:

MAKE DETAIL

MANUFACTURE PER E1911

 BUY BLANK COMPLETE

SEE ELECTRONIC FILE FOR ADDITIONAL INFORMATION.

E4298-C

G4762-1A1

( 2 BOARDS PER PANEL)

4 LAYER BOARD BLANK PANEL

ITEM

QTY

PART NUMBER DESCRIPTION

1

1

G4763-A

PC BOARD BLANK

2 (TRI1, TR!2, X5, X9)*

4

CF000003

6-32 X .375 ROUND HEAD MACHINE SCREW

3 (TRI1, TRI2, X5, X9)*

4

E106A-13

# 6 LOCK WASHER

4 (TRI1, TRI2, X5, X9)*

AS REQ E1868

THERMO JOINT COMPOUND

5 (TRI1, TRI2, X5, X9)*

4

S18104-3

HEAT SINK,ALUMINUM,EXTRUDED,FOR 1 TO-220

6

2

S19300-7

SUPPORT,PCB,SNAP=IN,063,WHT

7

5.0 OZ E2861

SEALANT

8

1

S26860-1

PSOC SOFTWARE

9

1

S26861-1

PSOC SOFTWARE

REFERENCES

QTY

PART NUMBER DESCRIPTION

C1, C7, C178, C179

4

S16668-8

CAPACITOR,CEMO,330pF,100V,5%

C2, C5, C17, C21, C25, 

C28, C36, C41, C46, C50, 

C57, C61, C69, C70, C71, 

C76, C77, C78, C85, C86, 

C89, C90, C103, C105, 

C106, C122, C123, C124, 

C125, C129, C130, C139, 

C148, C149, C157, C158, 

C165, C167, C168, C169, 

C171, C172, C173, C176, 

C177

45

S16668-11

CAPACITOR,CEMO,0.1, 50V,10%

C6, C16, C20, C35, C59, 

C100, C118, C143, C155

9

S13490-42

CAPACITOR,TAEL,1.0,35V,10%

C8, C9, C11, C26, C27, 

C32, C42, C44, C56, C65, 

C66, C67, C68, C83, C87, 

C92, C101

17

S16668-6

CAPACITOR,CEMO,4700pF,50V,10%

C10, C24, C58

3

S16668-3

CAPACITOR,CEMO,100pF, 100V,5%

C14, C15, C141

3

S13490-181

CAPACITOR,ALEL,22,63V,20%

C18, C19, C37, C38, C62, 

C72, C73, C74, C75, C79, 

C80, C88, C91, C104, 

C107, C112, C128, C134, 

C142, C144, C145, C146, 

C147, C150, C151, C152, 

C153, C154, C156, C159, 

C170

31

S16668-5

CAPACITOR,CEMO,.022,50V,20%

C22, C51

2

T11577-54

CAPACITOR,CD,750PF,1000V,10%

C23, C52

2

S13490-183

CAPACITOR,ALEL,120MF,50V,20%

C53

1

S13490-92

CAPACITOR,ALEL,3300, 50V,+30/-10%

C60

1

S16668-7

CAPACITOR,CEMO,820pF,50V,5%

C81, C82, C98, C99, 

C117, C131, C133, C135, 

C136, C137, C140, C160, 

C161, C162, C163

15

T11577-52K

CAPACITOR,CD,.0047/.005,1400V,20%

C84

1

S13490-40

CAPACITOR,TAEL,2.7,50V,10%

C95, C96, C97

3

T11577-46K

CAPACITOR,CD,.05,600V,+80/-20%

C102, C138

2

S16668-9

CAPACITOR,CEMO,150pF, 100V,5%

C113, C114, C115, C116

4

S13490-81

CAPACITOR,PEF,0.1MF,400V,10%,RADIAL

C119, C120

2

S16668-2

CAPACITOR,CEMO,47pF, 100V,5%

C121

1

S13490-19

CAPACITOR,TAEL,1.8,20V,10%

C132

1

S13490-186

CAPACITOR,ALEL,1800,160V,20%

C175

1

S16668-1

CAPACITOR,CEMO,22pF, 100V,5%

D1, D16, D17, D18, D20, 

D21, D28, D36, D37, D38, 

D39, D90

12

T12705-34

DIODE,AXLDS,1A,400V,FR,1N4936

D2, D10, D11, D12, D13, 

D14, D19, D22, D25, D26, 

D31, D35, D40, D41, D42, 

D51, D54, D55, D58, D59, 

D60, D61, D64, D65, D66, 

D67, D72, D73, D79, D80, 

D81, D82, D83, D84, D85, 

D86, D87, D89, D96

39

T12199-1

DIODE,AXLDS,1A,400V

D7, D91, D92, D93, D94, 

D95

6

T12705-64

DIODE,SCHOTTKY,AXLDS,0.2A,30V,BAT42

D46, D47, D48, D49, D50

5

T12705-14

DIODE,AXLDS,3A,200V,1N5402

D62, D63

2

T12705-23

DIODE,SCHOTTKY,AXLDS,1A,30V,1N5818

D68, D69, D70, D71

4

T12199-2

DIODE,AXLDS,1A,1000V

DZ1, DZ3, DZ9, DZ29

4

T12702-29

ZENER DIODE,1W,15V,5%,1N4744A

DZ4, DZ12, DZ13, DZ26, 

DZ27, DZ28

6

T12702-27

ZENER DIODE,1W,10V,5%,1N4740A

DZ5, DZ20

2

T12702-53

ZENER DIODE,1W,3.3V,5%,1N4728A

DZ6, DZ10

2

T12702-19

ZENER DIODE,1W,12V,5%,1N4742A

DZ7, DZ8, DZ14

3

T12702-23

ZENER DIODE,5W,15V,5%,1N5352B

DZ15, DZ16, DZ17, DZ18, 

DZ19

5

T12702-52

ZENER DIODE,1W,5.1V,5%,1N4733A

DZ23, DZ24, DZ25

3

T12702-45

ZENER DIODE,1W,18V,5%,1N4746A

J2, J3

2

S21134-10

CONNECTOR,MOLEX,MINI,BLIND,F,10-PIN

J4, J10

2

S24020-10

CONNECTOR,MOLEX,MINI,PCB,10-PIN,TIN

J5, J13, J5A

3

S24020-8

CONNECTOR,MOLEX,MINI,PCB,8-PIN,TIN

J6

1

S24020-2G

CONNECTOR,MOLEX,MINI,PCB,2-PIN,GOLD

J7, J8, J12

3

S24020-6

CONNECTOR,MOLEX,MINI,PCB,6-PIN,TIN

J9

1

S24020-12

CONNECTOR,MOLEX,MINI,PCB,12-PIN,TIN

J11

1

S24020-16

CONNECTOR,MOLEX,MINI,PCB,16-PIN,TIN

J14

1

S18248-4

CONNECTOR,MOLEX,MINI,PCB,4-PIN

L1, L2

2

T12218-9

CHOKE,RF,390UH,5%, 225MA,CONFORMAL

OCI1, OCI2, OCI5, OCI8

4

S15000-16

OPTOCOUPLER,TRIAC,DRIVER,ZVC,3083

OCI3, OCI4

2

S15000-31

OPTOCOUPLER,TRIAC,DRV,RANDOM,800V

OCI6, OCI7

2

S15000-10

OPTOCOUPLER,PHOTO-Q,70V,CNY17-3

Q1, Q4, Q18

3

T12704-69

TRANSISTOR,PNP,TO226,0.5A, 40V,2N4403

Q2, Q3, Q5, Q6, Q7, Q12, 

Q13, Q16, Q17, Q19, 

Q20, Q21, Q22, Q23, 

Q24, Q26, Q27, Q28, Q29

19

T12704-68

TRANSISTOR,NPN,TO226,0.5A,40V,2N4401

Q10, Q11

2

T12704-54

TRANSISTOR,NMF,TO220,15A,60V,(SS)

Q25

1

T12704-73

TRANSISTOR,NMF,4-PIN DIP,1A,100V,IRFD110(SS)

R2

1

T10812-41

TRIMMER,ST,1/2W,10K, 10%,LINEAR

R3, R5

2

S16296-3

TRIMMER,MT,1/2W,500, 10%,LINEAR

R4, R7

2

T10812-73

TRIMMER,ST,1/2W,2K, 10%,LINEAR

R6

1

S16296-5

TRIMMER,MT,1/2W,10K, 10%,LINEAR

R8, R16, R120, R122, 

R172, R317, R356, R369, 

R376, R380, R402

11

S19400-1000

RESISTOR,MF,1/4W,100,1%

R9, R91, R116, R117, 

R350

5

S19400-3322

RESISTOR,MF,1/4W,33.2K,1%

R13

1

T14648-4

RESISTOR,WW,5W,40,5%,SQ

R14, R18, R141, R142, 

R143, R144, R145, R146, 

R147, R148, R149, R150, 

R151, R152, R153, R154, 

R155, R156, R390, R398, 

R413, R420, R421, R422, 

R423

25

S19400-47R5

RESISTOR,MF,1/4W,47.5,1%

REFER TO ELECTRONIC COMPONENT DATABASE FOR SPECIFICATIONS ON ITEMS LISTED BELOW

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X X X X

X X X X X X

X X

2

3

4

5

8

N.G.

9

N.H.

N.A.

N.A.

XXX

XXX

X X X X

X

N.D.

N.J.

N.K.,N.L.

N.C.

R15, R19, R47, R48, R49, 

R50, R51, R52, R53, R54, 

R308, R311

12

S19400-10R0

RESISTOR,MF,1/4W,10.0,1%

R17, R20, R21, R22, R29, 

R40, R41, R44, R55, R56, 

R58, R75, R76, R136, 

R176, R210, R213, R214, 

R241, R275, R282, R287, 

R288, R291, R319, R323, 

R325, R329, R330, R331, 

R359, R366, R375, R378, 

R379, R383, R404, R406, 

R407, R408, R409, R412, 

R418

43

S19400-4751

RESISTOR,MF,1/4W,4.75K,1%

R24, R39, R46, R84, R97, 

R109, R119, R123, R126, 

R127, R130, R132, R133, 

R159, R160, R163, R175, 

R203, R204, R209, R212, 

R240, R246, R247, R250, 

R253, R289, R293, R294, 

R296, R297, R299, R300, 

R302, R321, R332, R352, 

R353, R358, R384, R386, 

R394, R403, R4

45

S19400-1002

RESISTOR,MF,1/4W,10.0K,1%

R25, R67, R125, R134, 

R158, R211, R242, R251, 

R281, R392, R419

11

S19400-2212

RESISTOR,MF,1/4W,22.1K,1%

R38, R254, R298, R313, 

R387, R411, R415

7

S19400-9091

RESISTOR,MF,1/4W,9.09K,1%

R42, R128, R164, R169, 

R215, R216, R245, R260, 

R261, R339

10

S19400-4752

RESISTOR,MF,1/4W,47.5K ,1%

R43

1

S19400-2213

RESISTOR,MF,1/4W,221K,1%

R45, R66, R85, R108, 

R171

5

S19400-2002

RESISTOR,MF,1/4W,20.0K,1%

R57, R371

2

S19400-2210

RESISTOR,MF,1/4W,221,1%

R59, R252, R259, R377, 

R389

5

S19400-3321

RESISTOR,MF,1/4W,3.32K,1%

R72, R101, R102, R276

4

S19400-26R7

RESISTOR,MF,1/4W,26.7,1%

R73, R74, R131, R135, 

R170, R205, R270, R292, 

R295

9

S19400-1003

RESISTOR,MF,1/4W,100K,1%

R77, R385

2

S19400-6811

RESISTOR,MF,1/4W,6.81K,1%

R78

1

S19400-3921

RESISTOR,MF,1/4W,3.92K,1%

R79

1

S19400-3011

RESISTOR,MF,1/4W,3.01K,1%

R83, R87, R118, R168, 

R248, R249, R277, R280

8

S19400-1004

RESISTOR,MF,1/4W,1.00M,1%

R92, R103, R104, R129, 

R140, R161, R179, R202, 

R206, R207, R239, R243, 

R263, R267, R273, R274, 

R279, R305, R312, R314, 

R315, R320, R364, R388, 

R396, R400, R405, R410

28

S19400-1001

RESISTOR,MF,1/4W,1.00K,1%

R98, R177, R278, R336, 

R395

5

S19400-4750

RESISTOR,MF,1/4W,475,1%

R100, R271, R334, R337, 

R340, R341

6

S19400-5110

RESISTOR,MF,1/4W,511,1%

R110, R111

2

S19400-2001

RESISTOR,MF,1/4W,2.00K,1%

R112

1

S19400-9092

RESISTOR,MF,1/4W,90.9K,1%

R121, R124, R244, R318

4

S19400-7681

RESISTOR,MF,1/4W,7.68K,1%

R137, R138, R181, R217, 

R262, R304

6

S19400-1211

RESISTOR,MF,1/4W,1.21K,1%

R139, R180, R218, R264

4

S19400-2670

RESISTOR,MF,1/4W,267,1%

R162, R173, R333, R338, 

R372, R373, R374

7

S19400-3320

RESISTOR,MF,1/4W,332,1%

R165

1

S19400-3323

RESISTOR,MF,1/4W,332K,1%

R166

1

S19400-5621

RESISTOR,MF,1/4W,5.62K,1%

R167, R301

2

S19400-1501

RESISTOR,MF,1/4W,1.50K,1%

R178

1

T14648-24

RESISTOR,WW,5W,0.5,5%,SQ

R182, R183, R184, R185, 

R186, R187, R188, R189, 

R190, R191, R192, R193, 

R194, R195, R196, R197, 

R198, R199, R200, R201, 

R219, R220, R221, R222, 

R223, R224, R225, R226, 

R227, R228, R229, R230, 

R231, R232, R233, R234, 

R235, R236, R237, R238

40

S19400-68R1

RESISTOR,MF,1/4W,68.1,1%

R265, R266, R306, R351

4

S18380-1

THERMISTOR,PTC,56 OHMS,90MA

R268, R309, R343, R346

4

S19400-2490

RESISTOR,MF,1/4W,249,1%

R269, R307

2

S19400-2673

RESISTOR,MF,1/4W,267K,1%

R272

1

S19400-3922

RESISTOR,MF,1/4W,39.2K,1%

R286, R328

2

S19400-2802

RESISTOR,MF,1/4W,28.0K,1%

R303

1

S18380-3

THERMISTOR,PTC,.08-0.19 OHMS,1.85A

R310

1

S19400-6810

RESISTOR,MF,1/4W,681,1%

R316

1

S19400-3012

RESISTOR,MF,1/4W,30.1K,1%

R322

1

S19400-3570

RESISTOR,MF,1/4W,357,1%

R335, R342, R344, R345, 

R347, R365, R381

7

S19400-2000

RESISTOR,MF,1/4W,200,1%

R348, R349, R362, R363

4

S19400-20R0

RESISTOR,MF,1/4W,20.0,1%

R357

1

S19400-1502

RESISTOR,MF,1/4W,15K,1%

R361, R367, R368

3

S19400-2211

RESISTOR,MF,1/4W,2.21K,1%

R382

1

S19400-1500

RESISTOR,MF,1/4W,150,1%

R391

1

S19400-5622

RESISTOR,MF,1/4W,56.2K,1%

R401

1

T10812-79

TRIMMER,ST,1/2W,100, 10%,LINEAR

R414

1

S18380-5

THERMISTOR,PTC,0.5-1.17 OHMS,0.5A

T1, T2

2

T12737-2

TRANSFORMER,PULSE,3-WINDING,1:1:1

TP1, TP3, TP5, TP6

4

T13640-25

MOV,130VRMS,90J,20MM

TP2

1

T13640-16

MOV,150VRMS,80J,20MM

TP4, TP7, TP9, TP10, 

TP11, TP12

6

T13640-18

MOV,320VRMS,150J,20MM

TP8

1

T13640-11K

MOV,150VRMS,45J,14MM

TRI1, TRI2, TRI3, TRI4

4

S15161-27

TRIAC,TO220,8A,800V

X1

1

S17900-24

IC,CMOS,GATE,NAND,2-INPUT,QUAD,SCHM(SS)

X2

1

S17900-8

IC,CMOS,INVERTER,SCHMITT,HEX,HC14A(SS)

X4, X14

2

S15018-6

IC,CMOS,SWITCH,ANALOG,QUAD, 4066(SS)

X5

1

S15128-6

IC,VOLT REG,FIXED,3-T,(+),1A,15V,TO220

X8, X12, X13, X16

4

S15128-18

OP-AMP,QUAD, HIGH-PERF,33074

X9

1

S15128-15

IC,VOLT REG,ADJ,3-T,(+),3A,350,TO220

X11

1

S15018-4

IC,CMOS,INVERTER,SCHMITT, HEX,4584(SS)

X17

1

M15102-4

IC,ARRAY,DRIVER,PERIPHERAL,NPN,DARL

X19

1

S15128-16

IC,OP-AMP,QUAD,HIGH-PERF,1014

X20, X21

2

S25073-9

IC,CMOS,PSOC,8-BIT,CY8C27443,DIP-28(SS)

G-18

Retur

n

to

Section

TOC

Retur

n

to

Section

TOC

Retur

n

to

Section

TOC

Retur

n

to

Section

TOC

Retur

n

to

Master

TOC

Retur

n

to

Master

TOC

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Master

TOC

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Master

TOC

Содержание Precision TIG 375

Страница 1: ...Safety Depends on You 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 o...

Страница 2: ...INJURY OR DEATH KEEP CHILDREN AWAY PACEMAKER WEARERS SHOULD CONSULT WITH THEIR DOCTOR BEFORE OPERATING Read and understand the following safety highlights For additional safety information it is stron...

Страница 3: ...es 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 standards 4 b Use suitable clothing made from durable flame re...

Страница 4: ...that welding sparks and hot materials from welding can easily go through small cracks and openings to adjacent areas Avoid welding near hydraulic lines Have a fire extinguisher readily available 6 b W...

Страница 5: ...onnel travaillant proximit au soudage l aide d crans appropri s et non inflammables 4 Des gouttes de laitier en fusion sont mises de l arc de soudage Se prot ger avec des v tements de protection libre...

Страница 6: ...ion C Maintenance Section D Theory of Operation Section E Troubleshooting and Repair Section F How to Use Troubleshooting Guide F 2 PC Board Troubleshooting F 3 Troubleshooting Guide F 4 Test Procedur...

Страница 7: ...Ranges A 3 Safety Precautions A 4 Stacking A 4 Lifting and Moving A 4 Tilting A 4 High Frequency Interference Protection A 4 Input Electrical Connections A 5 Ground Connection A 5 Output Cables Connec...

Страница 8: ...Power 40 AC DC Stick Balance TIG Unbalance 70 Penetration AC TIG 60 AC DC Stick Balance TIG Unbalance 70 Penetration AC TIG 100 AC DC Stick Balance TIG Unbalance 70 Penetration AC TIG Idle Amps Rated...

Страница 9: ...lance Penetration with out Standard Power Factor Correction Capacitors Based on the 1999 U S National Electrical Code RECOMMENDED INPUT WIRE AND FUSE SIZES Input Voltage phase Frequency 208 1 60 230 1...

Страница 10: ...N ENVIRONMENTAL RATING Precision TIG 375 power sources carry an IP21S Environmental rating They are rated for use in damp dirty rain sheltered environments HIGH FREQUENCY INTERFERENCE PROTECTION The f...

Страница 11: ...n the welder is enclosed in a metal building several earth driven electrical grounds as in 5 above around the periphery of the building are rec ommended Failure to observe these recommended installati...

Страница 12: ...ange this con nection designations on the reconnect panel LOW MID and HIGH correspond to the name plated input voltages of a triple voltage welder Dual voltage welders use only LOW and HIGH EXAMPLE On...

Страница 13: ...be damaged Never allow the torch to touch the cylinder Keep cylinder away from live electrical cir cuits Maximum inlet pressure 150 psi The Precision TIG machines do not have Hi Freq available at the...

Страница 14: ...pumps and large motors have starting currents which are significantly higher than their running current These higher starting currents may cause the circuit breaker to open See next paragraph Both the...

Страница 15: ...am The robotic interface functions with the Precision TIG set to either TIG or STICK mode but must be in REMOTE switch position for the Preset Control inter face to function When in the REMOTE positio...

Страница 16: ...0 NOTES PRECISION TIG 375 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 Master T...

Страница 17: ...3 Controls and Settings B 4 Welding Operation B 5 B 8 Internal Set Up Controls B 9 2 Step Trigger Modes B 10 4 Step Trigger Modes B 11 TIG Weld Cycle Chart B 12 Set Up for TIG Amptrol Welding B 13 Ma...

Страница 18: ...s AC DC Stick SMAW capability with adjustable Arc Force availability A TIG Pulse Panel Power Factor Capacitors and a Water Solenoid are available as field installed optional kits Also a new Undercarri...

Страница 19: ...257 series cannot be used for torch connection PRECISION TIG 375 CODES ABOVE 11000 RECOMMENDED EQUIPMENT INTERFACE TIG water cooled TIG air cooled Machine PT375 Welding Package K2624 1 PT375 K2622 1 2...

Страница 20: ...position No panel light When the Polarity Switch is set to AC the TIG mode provides continuous high frequency to stabi lize the arc for AC TIG welding Hi Freq turns on after preflow time with the arc...

Страница 21: ...TE posi tion this knob sets the maximum welding level that the Peak output can be set with the remote Amptrol The new MicroStartTM Technology minimum current circuit provides for low end welding down...

Страница 22: ...n 5 0 1 2 3 4 5 Description HS TIG Hot Start of output setting 0 Only setting for SS0 above 10 20 30 40 50 60 70 80 90 UP Upslope Time None Only setting for SS1 SS2 above 0 5 sec 1 0 sec 1 5 sec 2 0 s...

Страница 23: ...et receptacle is provided for the connection of an Amptrol or other remote control See Figure B 2 When the Current Control Switch See Item 5 is in the REMOTE position the Amptrol or other remote 10K p...

Страница 24: ...ined by the SPOT TIME control A red panel light is ON to indicate SPOT mode 14 PULSE FREQUENCY CONTROL This knob is used to set the Pulse Frequency over the peak pulse range of about 0 1 pps to 20 pps...

Страница 25: ...00 Prevents stubbing of the electrode by providing extra output current if the arc voltage drops below the level required to sustain the welding arc High 65 and Low 12 factory set levels are selectabl...

Страница 26: ...put Current Gas Pre Flow Post Flow Normal Sequence Torch Button Output Current Gas Pre Flow Post Flow START CRATER CURRENT UP SLOPE DOWN SLOPE With DIP Switch 2 OFF With DIP Switch 2 ON As Shipped Act...

Страница 27: ...ly end down slope and maintain crater current Hold the trigger for more than 1 second to activate the restart function When the trigger is released up slope will occur Hold the first trigger pull to m...

Страница 28: ...ope Time DOWNSLOPE Adjust 0 10 sec w Advan Panel Fixed 0 sec w o POSTFLOW Adjust 2 60 sec or x2 CRATER FILL LEVEL Advanced Panel Select Mach Min or MIN Setting as w o Panel With PULSE ON No Pulsing Du...

Страница 29: ...output level FIGURE B 6 A Ad dv va an nc ce ed d P Pa an ne el l C Co on nt tr ro ol ls s SETUP GUIDELINES FOR TIG WELDING WITH AN AMPTROL Both the Hand and Foot Amptrols work in a similar manner The...

Страница 30: ...gsten in AC and DC applications Balanced Wave Unbalanced Wave requires derating of the electrode MAKING A TIG WELD WITH AN AMPTROL 1 Install welding equipment per Section A 5 2 Setup controls per Sect...

Страница 31: ...TABLE OF CONTENTS ACCESSORIES Accessories Section C Optional Equipment for Codes Above 11000 C 2 Optional Equipment for Codes Below 11000 C 3 Return to Master TOC Return to Master TOC Return to Master...

Страница 32: ...oolant inlet and cooler receptacle of Precision TIG Cannot be used with a water cooler K870 Foot Amptrol Single pedal foot activation of arc start switch and output control with 25 plug cable K870 1 S...

Страница 33: ...ed in the package K1828 1 Under Cooler Cart Includes a cooler in a drawer with hoses and a lockable storage drawer on a dual bottle undercar riage see below K1869 1 Undercarriage Includes a dual bottl...

Страница 34: ...4 NOTES C 4 PRECISION TIG 375 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...

Страница 35: ...tions D 2 Routine and Periodic Maintenance D 2 Overload Protection D 2 Service Procedures D 3 Component Location and Access D 3 Spark Gap Adjustment D 3 Under Cooler Service D 3 Major Component Locati...

Страница 36: ...the machine with the cooling air The cooling fan will oper ate briefly when the machine power is initially turned on and continuously while the yellow Thermal Shutdown Light is lit see Thermostatic P...

Страница 37: ...less high frequency is desired the setting can be reduced to 0 008 inches 0 2 mm Use extreme caution when working with the high frequency circuit The high voltages developed can be lethal Turn the in...

Страница 38: ...n 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 Case Bac...

Страница 39: ...1 X2 AC AC DC DC SHUNT CHOKE HIGH FREQUENCY TRANSFORMER HIGH VOLTAGE TRANSFORMER THERMOSTAT 115 VAC 115 VAC 115 VAC FANS GATE LEADS FEEDBACK GAS SOLENOID 115 VAC 115 VAC LED s THERMOSTATS 20 VAC 20 VA...

Страница 40: ...ow of shielding gas It features a stick output terminal front and a universal Tig torch connection box rear for simultaneous but separate electrode outputs INPUT POWER CIRCUIT The desired single phase...

Страница 41: ...mer and the cooling fan The advanced control panel also plugs into and interfaces with the control board THEORY OF OPERATION FIGURE E 3 OUTPUT RECTIFICATION CONTROL BOARD AND FEEDBACK POWER SWITCH REC...

Страница 42: ...NIMUM OUTPUT CONTROL MAXIMUM OUTPUT CONTROL PROTECTION BOARD REMOTE RECEPTACLE METER STICK TIG SWITCH BALANCE CONTROL POST FLOW LOCAL REMOTE SWITCH Precision Tig 375 FROM CONTROL BOARD X3 STICK OCV BO...

Страница 43: ...OWER FACTOR POLARITY SWITCH BYPASS BOARD WORK FRONT ELECTRODE REAR ELECTRODE 78 VAC X1 X2 AC AC DC DC SHUNT CHOKE HIGH FREQUENCY TRANSFORMER HIGH VOLTAGE TRANSFORMER THERMOSTAT 115 VAC 115 VAC 115 VAC...

Страница 44: ...rminals The bypass board protects the internal circuitry from interference THEORY OF OPERATION FIGURE E 7 AC WELDING OUTPUT POWER SWITCH RECONNECT PANEL OPTIONAL POWER FACTOR POLARITY SWITCH BYPASS BO...

Страница 45: ...t of current into the gate This gate pulse must be more positive than the cathode voltage Since there is a standard PN junction between gate and cathode the voltage between these terminals must be sli...

Страница 46: ...L PROTECTION This welder has thermostatic protection from excessive duty cycles overloads loss of cooling and excessive ambient temperatures When the welder is subjected to an overload or inadequate c...

Страница 47: ...cal Output Voltage Waveform AC Tig Mode F 40 Typical AC Voltage Waveform 50 AMPS AC Tig Mode F 41 Typical AC Voltage Waveform 2 AMPS AC Tig Mode F 42 Typical Output Voltage Waveform 200 AMPS DC Tig Mo...

Страница 48: ...te to the machine symptom Perform these tests checks in the order listed In general these tests can be conducted without removing the case wrap around cover Step 3 RECOMMENDED COURSE OF ACTION The las...

Страница 49: ...the PC Board can t be installed immediately put it back in the static shielding bag If the PC Board uses protective shorting jumpers don t remove them until installation is complete If you return a P...

Страница 50: ...re you proceed Call 1 888 935 3877 PROBLEMS SYMPTOMS POSSIBLE AREAS OF MISADJUSTMENT S RECOMMENDED COURSE OF ACTION OUTPUT PROBLEMS The machine is dead No weld out put no 115 VAC at the receptacle 1 C...

Страница 51: ...1 Check for loose or faulty connec tions on the heavy current carry ing leads Polarity switch output choke output terminals etc 2 Check for faulty connections or a defective thermostat Check leads 213...

Страница 52: ...ght is off 2 The air louvers may be blocked Remove the air obstruction and allow the unit to cool 1 One of the thermostats may be faulty Check or replace See the Wiring Diagram 2 Check for loose or fa...

Страница 53: ...of the heavy current carrying leads 3 Perform the SCR Bridge Test 4 Perform the T1 Transformer Test 5 Check the output current con trols for proper operation Normal resistance is 10 000 ohms See the W...

Страница 54: ...ng in the TIG mode the remote control device may be defective 1 Perform the SCR Bridge Test 2 Perform the T1 Transformer Test 3 Check the output current con trols for proper operation Normal resistanc...

Страница 55: ...inal insu lators for cracks or signs of over heating 1 Diode D1 may be shorted Check and replace if necessary 2 Check the polarity switch S2 for proper function and correct con nections 3 Perform the...

Страница 56: ...nterference Make sure that the machine is grounded properly according to the installation instructions If there are other high frequency sources in the area make cer tain that they are grounded prop e...

Страница 57: ...e control board 1 Check the high voltage trans former T2 The normal resis tance of the secondary winding is 12 5k ohms ELECTRIC SHOCK CAN KILL When 115 VAC is applied to T2 a very high voltage is deve...

Страница 58: ...1 The spark gap may be too large Check and reset per instructions in the Maintenance Section of this manual 2 The work and or torch cables may be in poor condition allow ing the high frequency to lea...

Страница 59: ...may be a welding proce dure problem When AC TIG welding the arc is erratic and there is a loss of clean ing of the work piece 1 The tungsten electrode may be small for the process Use a larg er diame...

Страница 60: ...Jumper in connector J 3 If the machine functions normally the Advanced Process panel or harness is defective 1 Welding current may be too high for the electrode size Reduce current control setting or...

Страница 61: ...nel or harness is defective 1 Check that either the advanced control board or jumper plug is in J3 on the control board 1 Check R1 potentiometer and associated leads between the control board and plug...

Страница 62: ...for electrical troubleshooting assistance before you proceed Call 1 888 935 3877 PROBLEMS SYMPTOMS POSSIBLE AREAS OF MISADJUSTMENT S RECOMMENDED COURSE OF ACTION FUNCTION PROBLEMS The meter does not...

Страница 63: ...ch set ting on the board See Installation Manual 1 Check plug J3 on the control board Either the jumper plug or the advanced control board must be plugged into J3 TROUBLESHOOTING REPAIR TROUBLESHOOTIN...

Страница 64: ...8 NOTES F 18 PRECISION TIG 375 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...

Страница 65: ...u do not understand the test procedures or are unable to perform the test repairs safely contact the Lincoln Electric Service Department for electrical trou bleshooting assistance before you proceed C...

Страница 66: ...the Mode Switch to the TIG mode and without closing the arc start switch preset the panel maxi mum output control so the panel digital meter reads 200 amps 2 Using a DC avg digital test voltmeter wit...

Страница 67: ...X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X DZ16 C47 R274 D58 R93 D21 X11 D65 C106 C35 Q17 D80 Q23 Q14 C31 R96 C128 C152 R318 R333 C76 R331 DZ22 D67 C155 R134 X10 R205...

Страница 68: ...2 F 22 PRECISION TIG 375 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 NOT...

Страница 69: ...any reason you do not understand the test procedures or are unable to perform the test repairs safely contact the Lincoln Electric Service Department for electrical trou bleshooting assistance before...

Страница 70: ...he input power to the Precision TIG 375 machine 2 Using the 3 8 nut driver remove the right side case cover 3 Locate the Spark Gap Assembly at the lower rear right side of the machine See Figure F 3 4...

Страница 71: ...oughout this manual If for any reason you do not understand the test procedures or are unable to perform the test repairs safely contact the Lincoln Electric Service Department for electrical trou ble...

Страница 72: ...o step 6 See Wiring Diagram 6 Unplug P22 from protection board Measure resistance at P22 See Tables 7 If readings below are OK protection board is bad 8 If readings below are wrong remote amptrol or r...

Страница 73: ...the test procedures or are unable to perform the test repairs safely contact the Lincoln Electric Service Department for electrical trou bleshooting assistance before you proceed Call 1 888 935 3877...

Страница 74: ...rrect transformer secondary voltages per Table F 3 5 Carefully check for 63 5 VAC at leads 267 to lead 268 Lead 268 is located at the background rectifier Note Lead 267 is located at resistor R8 See W...

Страница 75: ...X2 X1 TO X3 PRIMARY WINDINGS H1 TO H2 H1 TO H3 H1 TO H4 SECONDARY VOLTAGES 20 VAC 18VAC 85 VAC 75 VAC PRIMARY VOLTAGES 208 VAC 230 VAC 460 VAC NOTE If the input voltages vary the secondary voltages w...

Страница 76: ...0 NOTES F 30 PRECISION TIG 375 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...

Страница 77: ...eason you do not understand the test procedures or are unable to perform the test repairs safely contact the Lincoln Electric Service Department for electrical trou bleshooting assistance before you p...

Страница 78: ...igger and check for approximately 115 VAC at the solenoid leads 231A and 235 If the correct voltage is present the solenoid should activate and gas should flow 8 If voltage is present at leads 231A an...

Страница 79: ...not understand the test procedures or are unable to perform the test repairs safely contact the Lincoln Electric Service Department for electrical trou bleshooting assistance before you proceed Call 1...

Страница 80: ...y Replace the SCR Bridge Assembly See SCR Bridge Assembly Removal and Replacement 4 Repeat Step 3 testing SCR2 SCR3 and SCR4 5 To further check the SCR s functions use an SCR tester and proceed to the...

Страница 81: ...any reason you do not understand the test procedures or are unable to perform the test repairs safely contact the Lincoln Electric Service Department for electrical trou bleshooting assistance before...

Страница 82: ...Figure F 8 3 Perform the following test for all four SCRs See Figure F 8 4 Construct the circuit outline in Figure F 9 One 6V lantern battery can be used Resistor val ues are 10 The voltmeter scale s...

Страница 83: ...ter reads higher than zero the SCR is shorted 8 With switch SW 1 closed close switch SW 2 for two seconds and release The voltmeter should read 3 to 6 volts before and after switch SW 2 is released If...

Страница 84: ...8 NOTES F 38 PRECISION TIG 375 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...

Страница 85: ...rom a properly operating machine Note that each ver tical division represents 20 volts and that each horizontal division represents 5 milliseconds in time NOTE Scope probes connected at machine output...

Страница 86: ...l voltage and waveform checks with high frequency circuit OFF Perform High Frequency Disable Procedure This is the typical AC output voltage waveform generated from a properly operating machine Note t...

Страница 87: ...generated from a properly operating machine Note that each ver tical division represents 20 volts and that each horizontal division represents 5 milliseconds in time NOTE Scope probes connected at ma...

Страница 88: ...erform all voltage and waveform checks with high frequency circuit OFF Perform High Frequency Disable Procedure This is the typical AC output voltage waveform generated from a properly operating machi...

Страница 89: ...to work NOTE AC balance control set at Balanced position TYPICAL OUTPUT VOLTAGE WAVEFORM MACHINE LOADED TO 200 AMPS DC TIG MODE HIGH VOLTAGE HIGH FREQUENCY can damage test equipment Perform all volta...

Страница 90: ...4 F 44 PRECISION TIG 375 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 NOT...

Страница 91: ...ughout this manual If for any reason you do not understand the test procedures or are unable to perform the test repairs safely contact the Lincoln Electric Service Department for electrical trou bles...

Страница 92: ...o cut lead 7 Using a 7 16 nut driver disconnect heavy black leads S and F See Figure F 12 8 Using a 3 8 nut driver remove the screw securing the spark gap assembly box See Figure F 12 This will allow...

Страница 93: ...TRANSFORMER REMOVAL AND REPLACEMENT continued Figure F 12 3 8 Screw Leads S and F Locations Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC...

Страница 94: ...8 NOTES F 48 PRECISION TIG 375 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...

Страница 95: ...etailed throughout this manual If for any reason you do not understand the test procedures or are unable to perform the test repairs safely contact the Lincoln Electric Service Department for electric...

Страница 96: ...cess to the control board and its plugs 4 From left to right label and disconnect plugs J4 J5 J6 J8 J9 J10 J11 J12 See Figure F 14 5 Cut any necessary cable ties 6 Using a phillips head screwdriver re...

Страница 97: ...VAL AND REPLACEMENT continued J12 J11 J10 J9 J8 J6 J5 J4 Figure F 14 Control Board Plug Locations Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Mast...

Страница 98: ...2 F 52 PRECISION TIG 375 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 NOT...

Страница 99: ...his manual If for any reason you do not understand the test procedures or are unable to perform the test repairs safely contact the Lincoln Electric Service Department for electrical trou bleshooting...

Страница 100: ...Wiring Diagram 6 Remove the three screws mounting the Heat Sink Assembly to the Lift Bale Assembly Note placement of Insulators for reassembly 7 See SCR Replacement Procedures 8 Replace all leads baff...

Страница 101: ...or are unable to perform the test repairs safely contact the Lincoln Electric Service Department for electrical trou bleshooting assistance before you proceed Call 1 888 935 3877 DESCRIPTION This proc...

Страница 102: ...lint free cloth or paper towel 4 Inspect the mounting surfaces of each new diode Remove all burrs and wipe clean Do not use steel wool or any abrasive cleanser on the diode mount ing surface 5 Apply a...

Страница 103: ...er to the technician or machine operator and will invalidate your factory warranty For your safety and to avoid elec trical shock please observe all safety notes and precautions detailed throughout th...

Страница 104: ...COMMENDED THAT ALL NEW HARDWARE LEAF SPRING AND HOUSING BE USED FOR REASSEMBLY 2 Remove the old SCR 3 Clean the area on the heat sink around the SCR mounting surface Using a putty knife or similar too...

Страница 105: ...spring Orient the leaf spring so that it s ends are curved upward toward the bolt heads See figure F 21 Pressing on the bolt heads should pro duce a rocking motion of the spring in its housing If the...

Страница 106: ...turn 4 Tighten first cap screw 1 2 turn 5 Tighten second cap screw 1 2 turn 6 Tighten first cap screw 1 4 turn 7 Assembly now has proper clamping force 8 Perform the Active SCR Test CLAMPING PROCEDUR...

Страница 107: ...on the bolt heads should produce a rocking action of the spring in it s housing 5 Insert clamp assembly thru heat sinks Install nuts Tighten clamp nuts equally on bolts until finger tight Be sure tha...

Страница 108: ...2 F 62 PRECISION TIG 375 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 NOT...

Страница 109: ...s manual If for any reason you do not understand the test procedures or are unable to perform the test repairs safely contact the Lincoln Electric Service Department for electrical trou bleshooting as...

Страница 110: ...slot head screw drivers carefully pry the polarity switch handle from the shaft 8 Carefully peel back the lower nameplate on the case front located around the polarity switch to gain access to the pol...

Страница 111: ...RCUIT VOLTAGES MAXIMUM AC OPEN CIRCUIT VOLTAGE MAXIMUM DC OPEN CIRCUIT VOLTAGE 75 VAC 68 VDC MAXIMUM ACCEPTABLE OUTPUT VOLTAGE AT MINIMUM OUTPUT SETTINGS DC TIG Mode 2 5 Amps 20 Volts MAXIMUM ACCEPTAB...

Страница 112: ...6 F 66 PRECISION TIG 375 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 Master T...

Страница 113: ...2 G 14 Control P C Board Schematic Codes above 11000 G4762 Page 3 G 15 Control P C Board Schematic Codes above 11000 G4762 Page 4 G 16 Control P C Board Schematic Codes above 11000 G4762 Page 5 G 17 C...

Страница 114: ...220A G4 218 SCR4 D1 X1 NEG SCR3 POS SCR1 SCR2 252 B 224 G4047 3 8 2002A PRECISION TIG 375 WIRING DIAGRAM L9 L10 L6 L5 L4 L13 L11 411 W 403 404 405 406 407 408 409 410 401 402 TIG OPTION PCB J1 1 3 4 5...

Страница 115: ...20A G4 218 SCR4 D1 X1 NEG SCR3 POS SCR1 SCR2 252 B 224 G4047 1 3 8 2002A PRECISION TIG 375 WIRING DIAGRAM L9 L10 L6 L5 L4 L13 L11 411 W 403 404 405 406 407 408 409 410 401 402 TIG OPTION PCB J1 1 3 4...

Страница 116: ...S INTO LOWER SWITCHED RECEPTACLE PRECISION TIG 375 WIRING DIAGRAM L9 L10 L6 L5 L4 L13 L11 411 W 403 404 405 406 407 408 409 410 401 402 TIG OPTION PCB J1 06 17 20 02 1 3 4 5 6 8 9 10 7 2 1 3 4 5 6 8 9...

Страница 117: ...VIEW OF CONNECTOR ON PC BOARD ELECTRICAL SYMBOLS PER E1537 SYMBOLES LECTRIQUES SELON E1537 S MBOLOS EL CTRICOS CONFORME A E1537 COMPONENT VALUE UNITS RESISTORS OHMS WATTS CAPACITORS MFD VOLTS 8 0F CON...

Страница 118: ...BINA DE RELEVADOR DE 12V DE AC DIODE ROUE LIBRE DIODO DE RUEDA LIBRE L1 INDUCTEUR DE SORTIE STARTER INDUCTOR DE SALIDA ESTABILADOR INDUCTEUR DE HAUTE FR QUENCE INDUCTORES DE ALTA FRECUENCIA STARTERS T...

Страница 119: ...R X14 231B 231E 236 TOROID TOROID HI FREQ 115VAC GAS 115VAC FAN 115VAC 235 260 265 266 252 253 MICRO SWITCH ON POLARITY SWITCH VOLT FEEDBACK ELECTRODE VOLT FEEDBACK WORK 265 266 252 253 MICRO SWITCH O...

Страница 120: ...BALANCE REMOTE RED GREEN GREEN GAS GREEN THERMAL YELLOW B W B W B W B W 331 332 333 B W 334 335 331 331 332 332 333 333 334 334 335 335 B W B W B W B W B W 6J10 1J10 7J10 2J10 8J10 3J10 9J10 4J10 10J1...

Страница 121: ...AGE 1 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 Ret...

Страница 122: ...GE 2 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 Retu...

Страница 123: ...GE 3 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 Retu...

Страница 124: ...C159 37 S16668 5 CAPACITOR CEM O 022 50V 20 C14 C127 2 S13490 25 CAPACITOR TAEL 4 7 35V 10 C15 C141 C164 3 S13490 181 CAPACITOR ALEL 22 63V 20 C22 C51 2 T11577 54 CAPACITOR CD 750PF 1000V 10 C23 C39 C...

Страница 125: ...62 PAGE 1 G 13 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 Sectio...

Страница 126: ...62 PAGE 2 G 14 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 Sectio...

Страница 127: ...62 PAGE 3 G 15 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 Sectio...

Страница 128: ...62 PAGE 4 G 16 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 Sectio...

Страница 129: ...62 PAGE 5 G 17 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 Sectio...

Страница 130: ...38 C62 C72 C73 C74 C75 C79 C80 C88 C91 C104 C107 C112 C128 C134 C142 C144 C145 C146 C147 C150 C151 C152 C153 C154 C156 C159 C170 31 S16668 5 CAPACITOR CEMO 022 50V 20 C22 C51 2 T11577 54 CAPACITOR CD...

Страница 131: ...CHANGE J23 2 MFD CAPACITORS RESISTORS Ohms UNLESS OTHERWISE SPECIFIED 1A 400V ELECTRICAL SYMBOLS PER E1537 DIODES UNLESS OTHERWISE SPECIFIED GENERAL INFORMATION 1 4W 022 50V LABELS UNLESS OTHERWISE SP...

Страница 132: ...d may result in danger to the Machine Operator or Technician Improper PC board repairs could result in damage to the machine ELECTRICAL DIAGRAMS G 20 PRECISION TIG 375 PC BOARD ASSEMBLY PROTECTION M16...

Страница 133: ...ED 1 4W OF A COMPLETE ELECTRICAL SYMBOLS PER E1537 EARTH GROUND CONNECTION Graphic Graphic FRAME CONNECTION ARC STABILIZER CAPACITOR RESISTOR N A SHOW THE EXACT COMPONENTS COMMON CONNECTION AND SCREW...

Страница 134: ...e quality of the design and may result in danger to the Machine Operator or Technician Improper PC board repairs could result in damage to the machine ELECTRICAL DIAGRAMS G 22 PRECISION TIG 375 PC BOA...

Страница 135: ...ION OWNED BY THE LINCOLN ELECTRIC CO AND IS NOT TO BE REPRODUCED DISCLOSED OR USED WITHOUT THE EXPRESS PERMISSION OF UNLESS OTHERWISE SPECIFIED THE LINCOLN ELECTRIC CO CIRCUIT BOARD S WITH PUBLISHED S...

Страница 136: ...y result in danger to the Machine Operator or Technician Improper PC board repairs could result in damage to the machine ELECTRICAL DIAGRAMS PRECISION TIG 375 PC BOARD ASSEMBLY BYPASS AND CE L10882 1...

Страница 137: ...4039 PAGE 1 G 25 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 Sect...

Страница 138: ...4039 PAGE 2 G 26 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 Sect...

Страница 139: ...3 D4 D5 D6 D7 D9 5 S25040 5SMT DIODE SMD DUAL 0 200A 70V UFR DZ1 1 S25046 1SMT ZENER DIODE SMD 0 5W 5 1V 5 SOD123 DZ2 DZ3 2 S25046 4SMT ZENER DIODE SMD 0 5W 12V 5 SOD 123 N D J1 1 S24020 12 CONNECTOR...

Страница 140: ...4760 PAGE 1 G 28 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 Sect...

Страница 141: ...4760 PAGE 2 G 29 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 Sect...

Страница 142: ...4760 PAGE 3 G 30 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 Sect...

Страница 143: ...1 S25020 5SMT CAPACITOR SMD CERAMIC 2700pF 50V 5 X7R S0805 C9 C27 C28 C46 4 S25020 27SMT CAPACITOR SMD CER 0 1MF 50V 20 80 Z5U S0805 C11 1 S25020 9SMT CAPACITOR SMD CERAMIC 47pF 50V 5 COG S0805 C35 C...

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