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G-13
ELECTRICAL DIAGRAMS
SQUARE WAVE TIG 355
Control PC Board (G2512) Layout
G-13
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.
IDENTIFICATION
REQ'D.
ITEM
0.1 / 50
C42,C45
C50,C54,C57
C52,C53,C71
C63,C64
C65
2
2
3
3
1
.33 / 50
2700pf / 50
.02 / 600
10pf / 100
27 / 10
1N4004
9
Q6,Q8
2
1
1
X2
1
X3,X23
2
X4
1
X7,X10
2
2
X13,X14
X15,X21,X22
3
X16
1
X17,X18
2
X19,X24
2
X25
X26
X27
X28,X29,X31
X30
X32
X33
1
1
1
1
1
1
3
1
C37,C39,C43
3
150 / 50
C38,C40,C44,C66,C67,C68
6
.022 / 50
C49,C51,C72
3
18 / 15
2
C73,C74
150pf / 100
D1 thru D29,
2
56, 20%
R1,R4,R7,R12,R14,R17,R18,R21,
R28,R31,R33,R41,R42,R43,R60,
21
R96,R98,R100,R102,R104,R106,R108,
R110,R112,R114,R116,R121,R122,R123,
R11,R13,R32
3
680 1W
R26
R27,R54,R79
R30
R37,R148
R46
R48
R56,R150
R57
R58
R59
R62
1
3
2
1
1
1
2
1
1
1
R74,R81,R82,R83,R84,R85,R86,
R87,R88,R89,R90,R92,R93,R94,
R107,R109,R111,R113,R115,R118,
R95,R97,R99,R101,R103,R105,
R78,R124
R91
2
1
32
10K 10T
R132,R137,R144
3
1K 1T
500 10T
4.7 / 35
PTC1,PTC2
R2,R3,R5,R6,R10,R15,R16,R19,
R128
46
C46,C47,C48,C55,C58,C59,C61,C62,C132
9
D31 thru D97
96
R61
1
R20,R23,R24,R29,R35,R36,R39,
R51,R53,R68,R71,R72,R75,R80,
41
2
R141,R155
9
R64,R69,R125,R142
4
R38
R129,R154
2
1
X34
1
X35
1
X36
X37
X20,X38
2
X11,X12,X40,X42
4
Y1
1
19.66 mHz.
X39,X41
2
1
5
OCI1,OCI3,OCI4
3
C1,C25-C29,C31-C36,C56,C69,C100-C131
6
R49,R55,R138,R140,R151
5
R25
1
R8,R9,R66,R67,R152,R153
R22,R50,R65,R70,R117
R119,R120,R134,R135,R136,R160
R34,R40,R52,R76,R139,R146,R157,R158,R162
R130,R133,R149,R156,R159
R63,R73,R126,R127,R131,R161
Q1 thru Q5,Q7,Q9,Q10,Q11
X1
1
1
1
X6
X5
G2512
10K 1/4 W
4.75 K 1/4W
3.01 K 1/4W
1.5 K 1/4W
22.1 K 1/4W
30.1 K 1/4W
681 K 1/4W
68.1 K 1/4W
51.1 K 1/4W
9.09 K 1/4W
150 K 1/4W
1.82 K 1/4W
3.32 K 1/4W
2.43 K 1/4W
1 K 1/4W
1 M 1/4W
475 1/4W
681 1/4W
332 1/4W
243 1/4W
267 1/4W
100 1/4W
47.5 K 1/4W
16.2 K 1/4W
100 K 1/4W
VOLTAGE REG
BINARY COUNTER, 4 STAGE
HC08A AND GATE
IC-CMOS,MCU,DSP,320
ROM ASBLY
ROM ASBLY
12 STAGE BINARY COUNTER
HC373A LATCH 3 STATE
HC259 DECODER
8 BIT SHIFT REG
8-BIT MPU D/A
HC4351 8 CHAN ANALOG MUX
HC109 FLIP FLOP
2 INPUT NAND GATE QUAD
NPN DARLINGTON ARRAY
224N QUAD OP AMP
OP-27GZ OP AMP
33074A OP AMP
HC4066
HC04A INVERTER
431 I VOLT REF
AC04 INVERTER
AC139 DECODER
AC373 3 STATE LATCH
AC138 DECODER
HC74 FLIP FLOP