Lincoln Electric SQUARE WAVE TIG 355 Service Manual page 159

G-13
pC bOarD aSSEmbLy - pOWEr pC bOarD (G2081)
G2081
CAPACITORS = MFD/VOLTS
RESISTORS = OHMS/ 1/4 WATT UNLESS OTHERWISE SPECIFIED.
INDUCTANCE = HENRYS
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
G2081
ITEM
C1
C2,C9
C3,C16
C4, C5, C7
C6, C10
C8
C11, C13, C14
C12, C15
D1 thru D7, D11 thru D17,
D20,D22,D23
D8,D9,D10,D21
J1
J2
J3
J4
J5
J6
LED1, LED2, LED3, LED4
OCI1, OCI2, OCI3
OCI4, OCI5
Q1
R1, R2, R6, R12, R24
R3
R4, R9, R10
SQUARE
WAVE
R5, R8, R14, R20
POWER
R7, R13, R25
R11, R15
R16, R30
R17
R18
R19
R21, R31
R27
R33
R34,R35
SCR1
T1, T2
TRI1, TRI2, TRI3
X1
X2
X3
REQ'D.
IDENTIFICATION
1 150/50
2 .022/50
2 .047/100
3 .1/400
2 2.7/50
1 .47/50
3 3300/50
2 1000/35
17 1N4004
IN4936
4
HEADER
1
HEADER
1
HEADER
1
1 HEADER
1 HEADER
1 HEADER
4 RED LED
3 3043
2 CS5010
1 TRANS‐P T220 3 A, 100V, TIP32C
5 15K 1/4W
1 1.0 5W
3 200 1/4W
15 1W
4
3 27 1/2W
10 1/4W
2
2 2.21K 1/4W
47.5K
1
1 3.01K 1/4W
1 68.1K 1/4W
2 2.7 1W
1 4.75K 1/4W
1
150 1/4W
2
2 1/ 5W
1 2N6508
2
1:1:1
3 T2500D
1 VOLT‐REG, FIXED 3‐T (+), 1A,15V 1
1 VOLT‐REG, FIXED 3‐T (‐), 1A,15V
OVER VOLTAGE SENSING 3523
1
SQUarE WaVE TiG 355
G-13