R16 . . . . . . . . . . . . . . . . . . .RESISTOR-CC,1/2W,10M,5%
R32,R54,R119 . . . . . . . . . . . . . .RESISTOR-MF 22K 1/4W
R60,R81,R82,R83,R91,R95 . . .RESISTOR-MF 2.2K 1/4W
R2,R116 . . . . . . . . . . . . . . . . . .RESISTOR-MF 330 1/4W
R61,R107,R108 . . . . . . . . . . . . .RESISTOR-MF 100 1/4W
R112 . . . . . . . . . . . . . . . . . . . . .RESISTOR-MF 270 1/4W

R34,R117,R125,R126,R127, . . .RESISTOR-MF 3.3K 1/4W
R128,R129,R130,R131,R132,R133,R134,R135

R18,R19,R20,R33,R109 . . . . . .RESISTOR-MF 4.7K 1/4W
R25,R28,R74 . . . . . . . . . . . . . .RESISTOR-MF 5.6K 1/4W

R23,R38,R53,R58,R59,R68, . . .RESISTOR-MF 6.8K 1/4W
R105

R8,R9,R10,R11,R63,R65, . . . . .RESISTOR-MF 10K 1/4W
R76,R77,R78,R79,R88,R93,R97,R98,R104,R111,R140

R80 . . . . . . . . . . . . . . . . . . . . . .RESISTOR-MF 33K 1/4W
R73 . . . . . . . . . . . . . . . . . . . . .RESISTOR-MF 100K 1/4W
R4 . . . . . . . . . . . . . . . . . . . . . .RESISTOR-MF 2.7K 1/4W
R39 . . . . . . . . . . . . . . . . . . . . . .RESISTOR-MF 47K 1/4W
R36,R46 . . . . . . . . . . . . . . . . . .RESISTOR-MF 15K 1/4W
R12,R13,R14,R15,R72,R101 . . . .RESISTOR-MF 1K 1/4W
R44,R84 . . . . . . . . . . . . . .RESISTOR-WW,5W,1K,5%,SQ
R45,R85,R96 . . . . . . . . . . .RESISTOR-WW,5W,50,5%,SQ
R102,R124 . . . . . . . . . . . .RESISTOR-WW,5W,20,5%,SQ
R136,R137 . . . . . . . . . . . . . .RESISTOR-WW,7W,0.25,5%
X6 . . . . . . . . . .IC-CMOS,MCU,NO-ROM,DIP,68HC11A1P
X9 . . . . . .IC-CMOS,UNDERVOLT-SENSING,RESET,MCU
X12 . . . . . . . . . .IC-CMOS,SWITCH,ANALOG,QUAD,4066
X1 . . . . . . . . . . .IC-OP-AMP,QUAD,GEN-PURPOSE,224N
Y1 . . . . . . . . . . . . . . . . . . .CRYSTAL-QUARTZ,4.000MHZ
X3 . . . . . . . .IC-CMOS,GATE,NAND,2-INPUT,QUAD,HC00
X5 . . . . . . . . .IC-CMOS,LATCH,3-STATE,OCTAL,HC373A
X2,X20 . . . . .IC-CMOS,INVERTER,SCHMITT,HEX,HC14A
X7 . . . . . . . . . . . .IC-CMOS,REGISTER,SHFT,SI/PO,8-BIT
X11,X13,X19 . . . . . . . . . .IC-COMPARATOR,QUAD,2901N
X8 . . . . . . . . . .IC-CMOS REGISTER,SHFT,S-PI/SO,8-BIT
X21 . . . . . . . .IC-CMOS,TRNSCVR,BUS,3-STATE,OCTAL

Q1,Q2,Q3,Q4,Q6, TRANSISTOR-N,T226,0.2A,30V,2N4123
Q8,Q10,Q14,Q15,Q18,Q19,Q20

Q7,Q13 . . . . .TRANSISTOR-N,T226,0.5A,300V,MPS-A42

G-3

ELECTRICAL DIAGRAMS

2/95

G-3

IDEALARC SP-250

G1992 CONTROL PC BOARD

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.

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Identification

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