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G-10
ELECTRICAL DIAGRAMS
SQUARE WAVE TIG 355
Power PC Board (G2081) Layout
G-10
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
C1
1
150/50
.022/50
2
.047/100
C4, C5, C7
3
.1/400
C6, C10
2
2.7/50
C8
1
.47/50
C11, C13, C14
3
3300/50
C12, C15
2
1000/35
1N4004
LED1, LED2, LED3, LED4
4
3
3043
CS5010
2
Q1
1
R1, R2, R6, R12, R24
5
R3
1
1.0 5W
R4, R9, R10
3
R5, R8, R14, R20
15 1W
4
R7, R13, R25
3
27 1/2W
R11, R15
2
R16, R30
2
R18
1
R19
1
R21, R31
2
2.7 1W
R27
1
R33
1
SCR1
1
2N6508
T1, T2
2
1:1:1
TRI1, TRI2, TRI3
3
T2500D
X1
1
1
X2
1
1
X3
OCI1, OCI2, OCI3
OCI4, OCI5
C2,C9
2
D1 thru D7,
D11 thru D17,
D20,D22,D23
17
D8,D9,D10,D21
4
IN4936
1
R17
47.5K
2
R34,R35
1/ 5W
2
1
HEADER
J1
J2
J3
J4
J5
J6
1
1
1
1
1
HEADER
HEADER
HEADER
HEADER
HEADER
SQUARE
WAVE
POWER
CAPACITORS = MFD/VOLTS
RESISTORS = OHMS/ 1/4 WATT UNLESS OTHERWISE SPECIFIED.
INDUCTANCE = HENRYS
C3,C16
RED LED
G2081
TRANS-P T220 3 A, 100V, TIP32C
15K 1/4W
200 1/4W
10 1/4W
2.21K 1/4W
3.01K 1/4W
68.1K 1/4W
4.75K 1/4W
150 1/4W
VOLT-REG, FIXED 3-T (+), 1A,15V
VOLT-REG, FIXED 3-T (-), 1A,15V
OVER VOLTAGE SENSING 3523
G2081