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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-16
V300-I
PC BOARD ASSEMBLY - SWITCH - (L8441)
G-16
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Item Description
A1 ELECTRONIC MODULE ASSEMBLY
A2 ELECTRONIC MODULE ASSEMBLY
B1, B2, B3, B4, B5, B6, CONNECTOR, tab QC edge offset
B7, B8, B9, B10, B11, 1/4”
B12
C1, C5, C6, C7 CAPACITOR,CEMO .022 50V 20%
C2, C8 CAPACITOR, CEMO 2700P 50V 5%
C3, C4 CAPACITOR-PPF, .047 1200V 5%
D1, D2, D3, D4, D5, D6, DIODE, AXLDS 1A 400V FR 1N4936
D7, D8, D9, D10
DZ1, DZ2, DZ3, DZ12 DIODE, Zener 1W 10V 5% 1N4740A
DZ4, DZ7 DIODE, Zener 1W 15V 5% 1N4744A
DZ5, DZ6, DZ8, DZ9 DIODE, Zener 1W 6.2V 5% 1N4735A
Q1, Q2, Q3, Q10 TRANSISTOR-NMF, 4PDIP 1A 100V
RFD110
Q4, Q12 TRANSISTOR-N, T226 0.5A 40V
2N4401
Q5, Q6, Q7, Q8, Q9, Q11 TRANSISTOR-P, T226 0.5A 40V
2N4403
R1, R3, R5, R24 RESISTOR-MF, .25W 1% 100 ohm
Item Description
R2, R4 RESISTOR-MF, .25W 1% 221 ohm
R6, R8, R9, R17, R19, RESISTOR-MF, .25W 1% 10.0 ohm
R25, R26, R27, R33, R34
R7, R30 RESISTOR-MF, .25W 1% 1.50K ohm
R10, R32 RESISTOR-MF, .25W 1% 15.0K ohm
R11, R15, R22, R28 RESISTOR-CC, .50W 5% 1 ohm
R12, R14, R20, R21 RESISTOR-MF, .25W 1% 1.00K ohm
R13, R31 RESISTOR-MF, .25W 1% 20.0 ohm
R16, R23 RESISTOR-MF, .25W 1% 22.1K ohm
R18, R29, R37, R42 RESISTOR-MF, .25W 1% 475 ohm
R35, R36 RESISTOR-MF, .25W 1% 47.5 ohm
R38, R39, R40, R41 RESISTOR-MF, .25W 1% 39.2K ohm
NOTE: Individual parts listed are not available from Lincoln Electric.