WATER SOLENOID VALVE
COOLED GUNS ONLY) | GAS SOLENOID VALVE |
|
CIRCUIT
(+20V UNFILTERED)
V20U V20F
(+20V FILTERED)
USED.
NETVOLTAGE
POINTSOURCE
CONNECTION
7209 L
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Return to Master TOC
32 
31
4
41
2
6
ELECTRODE
CABLE
21
BREAKER | 32A | J101 |
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| 2 |
531J101
3
| R101 |
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| 2.0 |
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| JUMPER PLUG |
| 25W |
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| BURNBACK KIT IS INSTALLED) |
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| B32A |
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| J104 | J104 | J104 | J104 | J104 | J104 |
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| CR101 |
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J101 |
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2A |
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J101 |
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F101 |
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J101 |
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| J103 | 4 |
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| 6 | J103 | (Y) | J103 | 2 | D101 |
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| B508 | B509 |
GUN CABLE
CONNECTION
21 567 508 509 526 525
TP101 | C106 | |
150V | ||
.0047 | ||
80J | ||
1400V | ||
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12 10 11 7
J104 | J104 | J104 | J104 |
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| N.B. |
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| 1/2 OPTOCOUPLER |
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| CR101 | 1 |
1 | B526 |
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| OCI101 | ||
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| 24Vdc | |
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| R106 | 1.5K |
| D107 | |
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| CR2 | 2W |
| 2 | ||
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| B527 |
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| R152 |
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| 5.11K | |
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R103 | 4.75K | SCR101 | R107 | C102 |
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| 800mA | .02 |
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| 4.75K | Q101 |
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| 2N5655 |
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| C123 | J102 |
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R105 | 1.00K | 529 |
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| C103 | D106 | |
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| GLP |
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| RESET |
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| 525 | C108 | |
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| .0047 |
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| 1400V |
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| TP103 | CONTROL RELAY |
R110
D108 3300
1N4007 5W
R111
D109 3300
1N4007 5W
PT101
0.2mH
C104
.047
200V
SCR102 2N6397
1D110
20A
4400V
D117
DZ101
20V
5W
VOLTAGE
SUPPLIES
PT101
0.2mH
C105
.047 200V
SCR103
2N6397
2 | D11 | C107 |
| 20A | .0047 |
4 | 400V | 1400V |
R130
10K
C117 |
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50 |
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50V | R131 | 332 | ||
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TEMP. |
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SENSING | ||||
DIODE |
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6 |
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3 |
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TP102
130V
38J
R153 | 2.7 |
| 5W |
5
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| X101 | 7 |
| 6 | B |
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| R141 |
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R132 |
| 150K |
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13.7K |
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TEMP. COMPENSATED
SUPPLY VOLTAGE
FREE
WHEELING
3D12
(B)20A
B541
4 400V
D113
B539
(W)
C109
.33
200V
R112 | 1.0 |
| 10W |
VTC (1)
(+15V)
R113 | 2.2K |
2W |
R114 | 150K | ||
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| VCEMF | |
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R115 | 10K |
NOLAST
INFORMATIONGENERAL
155 | 125 | 129 |
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| LABELS |
E1537PER | SPECIFIED)OTHERWISE(.022/50VUNLESS | SPECIFIED)OTHERWISEUNLESS1/4W |
SYMBOLS | MFD= | (Ohms |
ELECTRICAL | CAPACITORS | =RESISTORS |
SUPPLY
(UNLESS SPECIFIED)OTHERWISE
400V1A, =DIODES
SUPPLYPOWER
1 2 3
CONNECTOR | J104 |
47
58
69
CONNECTORS | J101,J102, J103 AND |
1 | 4 |
2 | 5 |
3 | 6 |
GROUNDEARTH
10 11 12
-LN GMA7
-LN &7
SCHEMATICOPERATING
GND.
J5
V20F
METER KIT RECEPTACLE
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| (NOT ON P.C. BOARD) |
3 | 1 | 4 | 2 | 6 | 5 | (+15V) |
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| VTC |
GUN TRIGGER | 50V | TRIGGERING AND GROUND |
15J |
LEAD PROTECTION
SCR FULL | WIRE FEED MOTOR | BLANKING & CEMF | |
WAVE CONTROL | AND CURRENT SENSING | SIGNAL | |
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TOC
|
| S101 CLOSED - FAST |
S | F | S101 OPEN - SLOW |
| S101 |
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R135
2.21K
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S2 | (1) | R142 | 3.32K | R136 | 18.2K | |
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| R148 |
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D114 |
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DZ102 | R155 | 15.0K |
| Q103 |
10V |
| 600mA | ||
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1W |
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| 40V | |
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| C125 | DZ103 R149 | 150K |
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| 20V | ||
D128 |
| 4.7 | 1W |
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V20U
V20U
1 |
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R146 |
| R145 | 2 |
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221K | 133K | X101 | 1 | ||
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| 3 | A |
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R144 | 1.00K |
| C119 | ACCELERATION | |
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| 4.7 |
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| 35V |
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| 10K | R137 | CW |
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| R140 |
| R138 | |
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D118 | CW |
| 2K | 221K |
HIGH |
| J102 |
| 2 | |
544 | 221K |
| S1 |
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12 |
| CURRENT LIMITING |
| X101 | 14 |
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13 | D | D115 |
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| C118 |
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R128
10K
R129
R127
10K
15.0K
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R124 | 4.75K | |
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R143
1.82K
SCR104
800mA
200V
Q104
500mA
R125 | 3.32K |
R151 | 3.32K |
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Return
Return
V20F |
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S1 |
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D120 |
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R119 | 100K | |
R120 | ||
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| 332K | |
| 10 |
R2,10K | CW |
| J102 |
| 3 | R139 | |
(SPEED) | 543 | ||
542 |
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| C121 | |
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| .02 |
1600V
J102
| R133 |
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4 | 15.0K |
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50V | PHASE CONTROL | S1 |
| D126 |
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R134 | S2 |
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221K |
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D119
C115
.1
100V
3 1
C113
R123
2.21K
R147
1.00K
300V
D125 |
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D124 |
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Q102 | C110 |
500mA | .047 |
300V | 200V |
V20F |
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| X101 |
| R118 | 9 | C |
R117 | 6.81K |
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10K |
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S1 (3)
8
SPEED CONTROL
VCEMF |
V20F |
2
R126
QU101
2N6027
15
1/2W
C114
R121
2.21K
C112
| LEAD COLOR CODING |
| B - BLACK |
| R - RED |
BLANKING | W - WHITE |
| Y - YELLOW |
TOC
D121 |
| RESET & TURN |
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R116 |
| ON DELAY |
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1.00M |
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| R150 | |
5 |
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C111 | D129 | 47.5K | ||
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OCI101 | .01 |
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200V |
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4 |
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X101 | C120 |
LM224 |
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11 |
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C116
PT101
0.2mH
R122
4.75K
NOTES :
N.A. SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE
WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE NUMBER.
Return to Master
6 4
N.B. CR2 - GLP REED SWITCH (ACTUATED BY GROUND CURRENT).
R154 | (DEACTIVATE SCR'S PRIOR |
|
332K | TO DYNAMIC BRAKING) | SCR FIRING |
NOTE: Lincoln Electric assumes no responsibility for liabilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. This Printed Circuit Board schematic is provided for reference only. It may not be totally applic- able to your machine’s specific PC board version. This diagram is intended to provide general information regarding PC board function. 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.
