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G-9
ELECTRICAL DIAGRAMS
SQUARE WAVE TIG 275
R215
R117
D9
D17
D12
D13
C38
R114
C39
R125
C54
R18
C19
R63
R197
R186
C79
C72
R182
R211
C100
R196
R205
C84
R181
R195
C74
R179
C75
C91
R192
C77
D47
J1
J2
C102
C101
C16
C6
C5
C15
C28
C29
C30
C37
C31
C97
C87
C12
C44
C45
C46
C47
C7 C8 C10 C9
T1 T2
X1
X8
X6
X5
D2
D7
R210
R204
R207
R218
R214
R203
R5
R4
R1
R3
R13
R25
R56
R24
R27
R31
R20
R17
R23
R64
R65
R32
R33
X2
TRI2
R83
R82
R81
R80
R50
R49
R48
R47
R88
R87
R86
R85
R55
R54
R53
R52
R74
R75
R76
R77
R44
R43
R42
R41
R72
R71
R70
R69
R39
R38
R37
R36
R178
R191
R198
R147
R145
R159
R158
R168
R99
R98
R97
R96
R101
R100
R102
R103
R200
R183
R174
R161
R160
R170
R169
R110
R111
R109
R108
R104
R106
R107
R105
R22
R6
C21
C4
C98
C93
C105
C36
C60
C89
C1
C40
C92
D53
D43
R26
R66
R199
R201
R189
R190
R209
R213
R206
R212
R217
R7
C85
C86
D1
R16
R28
X7
TRI1
C18
C27
C96
C14
C13
D42
R146 R136
TP5
C94
C83
R208
R11
R12
R180
R184
C67
C73
C22
R46 R79
R51 R84
R45 R78
R40 R73
R21
R118
R216
R194
R193
R202
TP6
C153
R315
R316
R317
R318
R319
R320
R321
R322
C62 C63
R9
R10
TP1
TP2
TP3
TP4
R8
R323
R324
R325
R326
R14
R15
R403
R327
R402
R404
R401
OCI1
C24
C159
C160
C163
C165
C166
C169
C170
C171
C172
C173
C174
R410
R411
R415
R419
R435
R436
R437
R438
R439
R440 TRI3
X9
X10
X11
C76
C81
C185
C186
C187
C191
C193
C194
OCI5
Q8 Q9
R452
R464
R466
R467
R468
R469
R472
R492 R491
R493
R494
R495
R496
R497
R498
C208
C209
C210
C211
C212
R534
R535
R536
R537
R538
R521
R522
R523
R524
R525
R526
R527
R528
R529
R530
R531
R532
C228
C227
R541
R543
R544
R545
R546
R547
R548
R549
X12
C229
C230
R503
R504
C219
R505
C216
C217
C222
R509
R507
R508
R506
R513
C223
C224
X13
R515
R516
R517
C225
R500
R501
R502
Y1
C214
C215
C218
R518
R519
R520
D454
C234
C818
X14
R542
R539
R499
R486
R485
R484
R483
R482
R481
R480
R477
R476
R474
R473
D79
C198
C200
C201
C204
C207
C231
C232
C233
D70
D72
D76
D77
D78
R34
C17
C183
DZ20
DZ21
DZ24
DZ22
DZ23
D64
DZ1
D46
D44
DZ4
D22
D21
D14
D20
DZ2
D45
D4
D54
D55
D36
D35
DZ9
DZ11
DZ14
C82
C103
C108
C104
C106
C99
C65
C158
C2
C180
C181
C197
C80
C66
C107
C95
C88
C190
C195
C196
D56
D57
D58
D59
D48
D50
D51
D52
D49
L2
L1
L5
L4
L6
L7
L8
OCI3
OCI2
OCI4
PTC1
PTC3
PTC2
Q1
Q11
Q18
Q21
Q20
Q2
Q5
Q15
Q16
Q22
Q19
Q17
Q12
Q13
Q24
Q26
X15
Q28
X16
C238
C240
C25
DZ13
R144
R552
L3
R490
Q27
R553
R514
J8
J7
J6
C152
C242
C243
C244
C246
C247
C248
C249
C250
C251
C252
C253
C254
C255
C258
C259
C260
C261
C262
C263
DZ27
DZ28
DZ29
D83
D84
D85
D86
D87
D88
D89
D91
J4
J5
J7A
L9
L10
L11
L12
OCI6
PTC4
PTC5
PTC6
Q29
Q30
Q31
Q32
Q33
Q34
Q35
Q36
Q37
R555
R556
R557
R558
R559
R560
R561
R562
R563
R564
R565
R566
R567
R568
R569
R570
R572
R573
R574
R575
R576
R577
R578
R579
R580
R584
R585
R587
R588
R589
R590
R591
R592
R593
R594
R595
R596
R597
R598
TRI4
C264
C265
C266
Q39
R600
R601
R602
R603
R604
C257
G3360-1
SW 275 CONTROL
DZ35
R611
R612
Q38
C203
R613
D92
C213
C221
C220
R614
Q40
C268
R615
D95
R616
C269
R617
D94
D93
C239
C154
R479
R487
R618
D90
J3
R583
XXXXXXXX
XXXXXXX
XXXXXXXXX
XXXXXXX
XXXXXX
XXXXXXXX
XXX
XXX
XXXXXXXXXX
XXXXXXXXXX
XXX
XXX
XXX
XXX
R620
XXXXXXXXXXXXXXX
XXXXXXXXXXXXXXX
XXX
XXX
XXX
XXX
XXX
XXX
XXX
XXX
ITEMITEM
REQ'DREQ'D
PART NO.PART NO. DESCRIPTIONDESCRIPTION
ITEMITEM REQ'DREQ'D
PART NO.PART NO. DESCRIPTIONDESCRIPTION
G-9
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 provided 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.
G3360-1
7-24-98