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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-8
PROCUT 55
PC BOARD ASSEMBLY-CONTROL (G3328-1)
J1
J3
J4
J2
J5
TP1
TP2
D1
D2
D3
D4
C1
X9
X7
X8
C5
R5
R6
R7
R8
R9
R10
C6
D9
D6
D8
D7
C3
R1
D5
R2
R3
R4
X5
X12
X1
X3
X6
X4
X2
X10
C64
C66
C63
C65
R39
R38
C35
C15
R33
R32
C16
C37
C36
C47
R34
R37
R94
R93
R42
R27
R30
R36
R26
R28
C68
C2
C8
C69
R102
R87
R99
R29
R58
R67
R91
R100
R101
C39
R56
R57
C30
R115
R116
R117
R118
R54
R55
C28
R45
C21
R52
R53
R153
R49
C26
X16
R152
R96
R103
R72
D14
C24
R46
R40
C53
C23
C43
C10
R35
C17
R24
C31
R48
R97
C44
C45
R78
R79
C22
R59
R149
R89
R98
R88
D21
D23
R85
R84
R83
R120
R121
R122
R123
C56
D15
D16
D17
D18
R13
R14
R12
R11
R17
R19
C13
R124
R125
R126
R127
R128
R129
R142
R143
R144
R145
R146
R147
C57
D10
D11
D13
C32
C33
R131
R132
R133
R134
R135
R130
C54
C55
R138
R139
R141
R137
C19
C61
C62
C42
C50
C58
C60
D12
D20
R110
R111
R104
R109
R47
C40
R76
C41
R61
R62
R63
R68
R69
R95
R106
R108
R112
R113
R114
R136
Y1
R44
R43
R31
D22
C52
C48
C46
C34
C25
C20
C14
PRO-CUT 50 CONTROL
C18
X11
Q3
Q2
Q1
C7
C9
C29
C59
DZ1
DZ2
D25
D26
D27
R20
R22
R140
R154
R155
R156
R157
R158
R159
R160
R164
R165
R166
R167
R900
G3328-1
C4
LED1
LED2
LED3
R21
R23
R70
R73
R77
R80
R81
R82
R107
R51
R119
R170
R171
R172
X18
R173
R174
R175
R176
R177
C73
R178
R179
R180
R181
R182
C71
X15
C74
C75
Q4
R184
R183
X13 X14
R18
C72
Q5
R168
D19
R169
D28
R901
ITEM
REQ'D
PART NO. DESCRIPTION
C1 1 S13490-92 3300/50
C2,C8,C10,C13,C14,C17,C20 31 S16668-5 .022/50
C23,C24,C29,C31,C34,C35
C36,C37,C39,C40,C41,C47
C53,C55,C58,C63,C64,C65
C66,C68,C69,C73,C74,C75
C3 1 S13490-121 1000/35
C4,C18 2 S13490-63 .47/50
C5 1 S13490-71 100/50
C6 1 T11577-52 .0047 or .005/1400
C7,C9 2 S13490-93 27/35
C15,C16,C32,C33,C42 5 S16668-11 .1/50
C19,C25,C50 3 S13490-25 4.7/35
C21,C26,C28,C30,C54,C57 8 S13490-42 1.0/35
C62,C71
C22,C43,C44 3 S16668-9 150pF/100
C46,C52 2 S16668-13 10pF/100
C48 1 S16668-8 330pF/100
C56 1 S13490-108 .15/100
C59 1 S16668-3 100pF/100
C60 1 S13490-126 .018/50V
C61 1 S13490-19 1.8/20
C72 1 S16668-10 4700pF/50
D1,D2,D3,D4,D5,D6,D7,D8,D9 16 T12199-1 1N4004
D10,D11,D12,D13 4 T12705-37 1N5822 SCHOTTKY BARRIER DIODE
D15,D16,D17,D18,D21 5 T12705-34 1N4936
DZ1,DZ2 2 T12702-19 1N4742A
J1 1 S18248-4 HEADER
J2 1 S18248-10 HEADER
J3 1 S18248-16 HEADER
J4 1 S18248-6 HEADER
J5 1 S18248-8 HEADER
LED1,LED2,LED3 3 T13657-2 RED LED
Q1,Q2,Q3 3 T12704-68 2N4401
Q4 1 T12704-80 HEXFET TRANS. (SS)
R1 1 T13165-16 1.0 OHM, 5W RESISTOR
R2,R46,R132 3 S19400-2671 2.67K 1/4W
R3,R30,R32,R33,R34,R36,R37 9 S19400-2430 243 1/4W
R38,R39
R4 1 S19400-30R1 30.1 1/4W
R5 1 S19400-6190 619 1/4W
R6 1 S19400-8251 8.25K 1/4W
R7 1 S19400-3921 3.92K 1/4W
R8 1 S19400-2001 2.0K 1/4W
R9,R88,R103 3 S19400-1001 1K 1/4W
R10,R42,R95,R96 4 S19400-5110 511 1/4W
R11,R12,R13,R14 4 S19400-3320 332 1/4W
R17,R26,R27,R49,R51,R59 35 S19400-1002 10K 1/4W
R61,R62,R63,R68,R69,R81
R153,R154,R156,R158,R160
R179,R180,R181,R182
R18 1 S24073-1 10K,1/2W,TRIMMER
R19,R47,R53,R55,R57,R85 8 S19400-5111 5.11K 1/4W
R144,R145,R146,R147.R901
R21,R23 2 S19400-1822 18.2K 1/4W
R77 1 S19400-2211 2.21K 1/4W
R24,R35 2 S19400-2210 221 1/4W
R28,R112,R115,R116,R117 7 S19400-3321 3.32K 1/4W
R118,R119
R29,R91,R102 3 S19400-8250 825 1/4W
R31 1 S19400-1004 1M 1/4W
R43,R44,R45,R136,R137,R170 8 S19400-4751 4.75K
R171,R172
R48,R67,R70,R87,R101 5 S19400-4752 47.5K 1/4W
R52,R54,R56 3 S19400-1000 100 1/4W
R82,R175,R177 3 S19400-1301 1.3K 1/4W
R79,R83,R155,R167 4 S19400-2213 221K 1/4W
R80,R89 2 S19400-1003 100K 1/4W
R98 1 S19400-2431 2.43K 1/4W
R109 1 S19400-6811 6.81K 1/4W
R120,R121,R122,R123 4 S19400-26R7 26.7 1/4W
R130 1 S19400-2212 22.1K 1/4W
R131,R174 2 S19400-6812 68.1K 1/4W
R133,R173 2 S19400-2672 26.7K 1/4W
R140,R141 2 S19400-2670 267 1/4W
R135,R183 2 S19400-1502 15K 1/4W
R176 1 S19400-4750 475 1/4W
R129,R184 2 S19400-5621 5.62K 1/4W
TP1,TP2 2 T13640-15 15J
X1,X2 2 S15128-16 LINEAR INTEGRATED CIRCUIT
X3 1 S15128-4 LM224 OP-AMP
X4,X6 2 S15128-13 PRECISION OP AMP IC
X7 1 S18647 REGULATOR ASBLY
X8 1 S18395-13 5V REG. ASBLY
X9 1 S15128-12 VOLTAGE REGULATOR
X10,X16 2 S15018-18 IC,ARRAY,CLAMPING
X11 1 M15102-3 RESET I.C. UNDERVOLT. SENSING CIR. (SS)
X12 1 M15458-2 PWM CONTROLLER I.C. (SS)
X15 1 M15105-8 CMOS,CONVERTER,D/A,SERIAL,10-BIT (SS)
X18 1 M13552-2 FREQ. TO VOLTAGE CONVERTER
Y1 1 S16665-5 8.0 MHZ
D14,D20,D22,D23,D25
D26,D27
Q5 1 T12704-69 HEXFET TRANS. (SS)
X13,X14 2 S15018-19 IC, DRIVER, FET, 6A
R72, R900 2 S19400-1501 1.5K 1/4W
R40,R73,R107 3 S19400-7681 7.68K 1/4W
R164,R165,R166,R178
R84,R93,R94,R104,R106,R108
R58,R76,R99,R100 4 S19400-3741 3.74K 1/4W
X5 1 S24085-1 ROM ASSEMBLY
R149,R157
C45 1 S16668-4 2700pF/50
R134,R138,R139,R152
R20,R22,R110,R111,R124,R125 16 S19400-10R0 10 1/4W
R126,R127,R128,R142,R143
R78,R113,R114,R159 4 S19400-1211 1.21K 1/4W
R97 1 S19400-8252 82.5K 1/4W
G-8
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