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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
G-18
V300-I
PC BOARD ASSEMBLY - SWITCH - (L10958-1)
G-18
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L10958-1
A
11/01/2002
0
0
6.40
8.50
SWITCH
C3
C4
R46
R28
R45
R22
R44
R43
R15
R11
R35
R36
R37
R42
R38
R39
R40
R41
R16
R14
R13
R12
R10
R7
R5
R4
R32
R2
R24
R31
R30
R20
R23
R21
R18
R3
R1
R29
R17
R8
R6
R9
R33
R34
R27
R25
R26
R19
C8
C2
C5
C6
C1
C7
DZ8
DZ5
D6
D1
DZ9
D7
DZ12
DZ7
D8
DZ3
DZ4
DZ6 D2
D3
D4
D5
D10
D9
DZ1
DZ2
Q2
Q3
Q1
Q10
B8 B4
Q11
Q12
Q8
Q9
Q4
Q5
Q6
Q7
L10958-1
B1 B2 B5 B6 B7 B3
B9
B10 B11 B12
A2
A1
ITEM
REQ'D
PART NO.
IDENTIFICATION
R27,R33,R34
R45,R46
C1,C5,C6,C7 4 S16668-5 .022/50
C2,C8 2 S16668-4 2700pF/50
C3,C4 2 S13490-112 .047/1200
D1,D2,D3,D4,D5,D6,D7,D8, 10 T12705-34 1N4936
D9,D10
DZ1,DZ2,DZ3,DZ12 4 T12702-27 1N4740
DZ4,DZ7 2 T12702-29 1N4744A
DZ5,DZ8 2 T12702-53 1N4728A
DZ6,DZ9 2 T12702-40 1N4735
Q1,Q2,Q3,Q10 4 T12704-73 IC PKG MOSFET
Q4,Q12 2 T12704-68 2N4401
Q5,Q6,Q7,Q8,Q9,Q11 6 T12704-69 2N4403
R1,R3,R5,R24 4 S19400-1000 100 1/4W
R2,R4 2 S19400-2210 221 1/4W
R6,R8,R9,R17,R19,R25,R26 10 S19400-10R0 10 1/4W
R7,R30 2 S19400-1501 1.5K 1/4W
R10,R32 2 S19400-1502 15K 1/4W
R11,R15,R22,R28,R43,R44 8 S19400-2R00 2.00 1/4W
R12,R14,R20,R21 4 S19400-1001 1K 1/4W
R13,R31 2 S19400-20R0 20 1/4W
R16,R23 2 S19400-2212 22.1K 1/4W
R18,R29,R37,R42 4 S19400-4750 475 1/4W
R35,R36 2 S19400-47R5 47.5 1/4W
R38,R39,R40,R41 4 S19400-3922 39.2K 1/4W