Lincoln Electric IDEALARC SP-250 Service Manual page 101

G-1
R100
J1
R2
R104
Q20
X7
R8
R10
Q3
Q1 Q4
C37
R9
J2
Q2
D31
D30
D27
D29
D26
D28
D25
D24
R12
R13
X8
R14
R15
R20
C44
D73
C29
C38
C31
R31
R80
D51
D52
X13
C9
C43
X19 R34
R32
R25
L5 L4 L6 L3
R84
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshoot-
ing. 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.
ELECTRICAL DIAGRAMS
G1992 CONTROL PC BOARD
X21
C77
C35 C34
X5
X4
X20 X2 X3
D72
R109
R76
R77 R121
R79
J7
X16
R62
C1
R119
D75
X11
D76
C14
C56
R37
C55
R36
X10
C13
R35
R120
R38
X12 R39
R112
C15
Q11
C3
J4
Q9
DZ2
C45
Q8
C51
J9
J6
J5
C94
C93
J3
R48
R90
R89
IDEALARC SP-250
SP-250 CONTROL
X17
C95
R98 R69
B
R97 R67
R68
R108
Y1
C27
R107
R16
C28
D54
R65
C6
D53
R61
C8
X6
D50
R18
C10
R33 R63
D
R70
R95
R91
R123
R117
C36
Q7
R122
R44
X15
C21
C18
DZ3
R118
C19
X14
DD1
Q21
C16
C
R40
C92
C22
C23
R124
R50
G1992-2
R138
J8
R139
R106
R53
D2
R52
R54
R3
R111
C47 R4
D69
D38
X1
C5
R58
D49 R59
R60
R105
R57
C26
C24
C25
R140
D1
D44
A
DZ6
D42
R45
R43
X18
R99
Q12
R71
R94 R87
OCI3 OCI2 OCI1
R93 R88
Q17
R96 R85
R102
G-1