Electrical diagrams, Control board (g2150) (cont’d) – Lincoln Electric SQUARE WAVE TIG 255 SVM100-A User Manual
Page 90
G-4
ELECTRICAL DIAGRAMS
SQUARE WAVE TIG 255
X19
IC-UNDERVOLTAGE-SENSING,RESET,
MCU
X10
IC-CMOS,INVERTER,SCHMITT,
HEX,HC14A
C65,C66
CAPACITOR-TAEL,4.7,35V,10%
X11,X14
IC-OP-AMP,QUAD,HIGH-PERF,33074A
C49,C67,C68
CAPACITOR-CD,.0047,3000V,20%
DZ13,DZ14,DZ15,
ZENER DIODE-1W,12V,5%,1N4742A
DZ16,DZ17
J2
CONNECTOR,PCB,WW,MALE,DIL,1X9
X15
REGULATOR & HEATSINK ASBLY
D10,D11,D21,D22
DIODE-AXLDS,1A,1000V
C79,C80
CAPACITOR-CD,750P,1000V,10%
R33
RESISTOR-MF,1/4W,301,1%
Y1
CRYSTAL-QUARTZ,8.000MHZ
OCI8,OCI9,OCI10
OPTOCOUPLER-TRIAC DRIVER,ZVC,
3083
X20,X21,X22
IC-CMOS,LATCH,3-STATE,OCTAL,
HC573A
TRI1,TRI2,TRI3
TRIAC-T220,6A,800V
R237
TRIMMER-MT,1/2W,10K,10%,LINEAR
X31,X32
IC-ARRAY,CLAMPING,PERIPHERAL
R164,R235
RESISTOR-WW,5W,150,5%,SQ
R7
RESISTOR-MF,1/4W,133K,1%
R230,R231,R232,
RESISTOR-MF,1/4W,26.7K,1%
R233,R234
NOTE: Lincoln Electric assumes no responsibility for liabilities resulting from board level troubleshooting. PC Board
repairs will invalidate your factory warranty. Individual Printed Circuit Board Components are not avail-
able 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.
CONTROL BOARD (G2150) (cont’d)
Item
Identification