Lincoln Electric SP-250 service manual OCI2,OCI3 Optocoupler Triac Driver

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G-7 ELECTRICAL DIAGRAMS G-7

G2252 CONTROL PC BOARD

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Item Identification

R97,R110,R160,R161, . . . RESISTOR-MF,1/4W,1.50K,1% R171,R172,R188,R189

R23,R115,R147,R187 . . . . RESISTOR-MF,1/4W,15.0K,1% R95 . . . . . . . . . . . . . . . . . RESISTOR-MF,1/4W,16.5K,1% R11,R15,R18,R166,R177 . RESISTOR-MF,1/4W,2.21K,1% R46,R47,R102,R111 . . . . . RESISTOR-MF,1/4W,22.1K,1% R118 . . . . . . . . . . . . . . . . . . RESISTOR-MF,1/4W,267,1% R114 . . . . . . . . . . . . . . . . RESISTOR-MF,1/4W,2.67K,1% R105 . . . . . . . . . . . . . . . . RESISTOR-MF,1/4W,26.7K,1% R165,R170 . . . . . . . . . . . . . RESISTOR-MF,1/4W,26.7,1% R120,R123,R130,R135 . . . RESISTOR-MF,1/4W,28.0K,1% R150 . . . . . . . . . . . . . . . . RESISTOR-MF,1/4W,3.01K,1% R49,R82 . . . . . . . . . . . . . . . RESISTOR-MF,1/4W,332,1%

R33,R34,R35,R36,R37, . . RESISTOR-MF,1/4W,3.32K,1% R38,R39,R40,R50,R51,R52,R53,R92,R112

R100,R101,R164,R169 . . . . RESISTOR-MF,1/4W,33.2,1% R66,R146 . . . . . . . . . . . . . RESISTOR-MF,1/4W,3.92K,1% R89 . . . . . . . . . . . . . . . . . . . RESISTOR-MF,1/4W,475,1%

R71,R81,R90,R91, . . . . . . RESISTOR-MF,1/4W,4.75K,1% R136,R190

R116 . . . . . . . . . . . . . . . . RESISTOR-MF,1/4W,47.5K,1% R125,R127 . . . . . . . . . . . . . RESISTOR-MF,1/4W,511,1% R126,R131 . . . . . . . . . . . . RESISTOR-MF,1/4W,51.1K,1% R167,R168,R173,R174 . . . . RESISTOR-MF,1/4W,562,1% R10,R68,R104,R106 . . . . RESISTOR-MF,1/4W,5.62K,1%

R77,R109,R113,R122, . . . RESISTOR-MF,1/4W,6.81K,1% R133,R149

R107,R117 . . . . . . . . . . . . . RESISTOR-MF,1/4W,750,1% 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 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 OCI1 . . . . . . . . OPTOCOUPLER-PHOTO-Q,70V,CNY17-3 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 Q21,Q31 . . . . TRANSISTOR-N,T226,0.5A,300V,MPS-A42

Item Identification

Q1,Q2,Q3,Q4,Q5, TRANSISTOR-N,T226,0.5A,40V,2N4401 Q10,Q12,Q14,Q22,Q23,Q40,Q41

Q13,Q25	TRANSISTOR-P,T226,0.5A,40V,2N4403
R191	. . . . . . . RESISTOR-MF,1/4W,475K,1%
Y1	. . . . . . . CRYSTAL-QUARTZ,4.000MHZ
OCI2,OCI3	. . . . .OPTOCOUPLER TRIAC DRIVER
SCR1,SCR2 . . . .	. . . . . . . . . . . . . . .4 A. 400 VOLT. SCR

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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.

IDEALARC SP-250