| SCHEMATIC |
| IDLER PC BOARD (M17578) |
| TOC |
| TOC |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1N5406 | J1 | 10 | 16 |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| D1 |
|
| D3 |
|
|
| |||
|
|
|
|
|
|
|
|
|
|
|
| Q2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
| D13 |
| 1A |
| R8 |
|
|
|
|
|
| 1N5406 |
|
|
|
|
|
| INPUT |
|
| |
|
|
|
|
|
|
|
|
|
| 300V |
| 5.11K |
|
|
| C6 |
|
|
|
|
| 1N5406 |
|
|
|
| ||||
|
|
|
|
|
|
|
|
| +8V |
|
|
|
|
|
|
| D2 |
|
|
| D4 |
|
|
|
| |||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 68 |
|
|
|
|
|
|
| COM |
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
| R9 |
|
|
| 63V | 1N5406 |
| t + |
|
|
|
| J1 | 9 | 9B |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
| 5.11K |
| C14 |
|
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| J1 | 202A |
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 68 |
|
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| .25 |
|
|
|
|
| 2 |
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 63V |
|
|
|
| R15 |
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
| DZ1 COM |
|
| D5 |
|
|
|
|
|
| TO |
|
| ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| D9 |
|
|
| ||||
|
|
|
|
|
|
|
| R5 | 10K |
|
|
|
| 8.2V |
|
|
|
|
|
|
|
|
|
|
| RHEOSTAT |
|
| ||
|
|
|
|
|
|
|
|
|
| 47.5K |
| 1W |
|
|
|
|
| D11 | 1 |
|
|
|
| 1N5406 | FLASHING |
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| CR1 |
|
|
|
| J1 |
| 14 |
| |||
|
|
|
|
|
|
|
|
|
|
|
|
| R7 |
|
|
|
|
|
|
|
|
|
|
| 7 |
| ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 12Vdc | 4 |
| 3 |
|
|
|
|
| ||
|
|
|
|
| R2 | R3 | 10K |
|
|
|
|
| COM |
| Q1 | D |
|
|
|
|
|
|
|
| 208 |
| ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 2 |
|
|
|
|
| J1 |
|
| |||||||
|
|
|
| 221K |
|
|
|
|
| R6 |
|
|
|
|
| 18A |
|
|
|
|
|
|
|
|
|
| 3 |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
| 200V |
|
|
|
|
| 5 CR1 | 5 CR1 |
|
|
|
| ||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||||||
|
|
|
|
|
|
|
|
|
| 33K1 |
|
|
| R30 |
| G |
|
|
|
|
|
|
| TO |
|
| ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| S |
|
|
|
|
|
|
|
|
| SOLENOID |
|
| |||
| C3 |
| C2 |
|
|
|
|
|
|
|
|
| 4.75K |
|
|
|
|
|
|
|
|
| D10 |
|
|
| ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| J1 |
| 209 |
| ||||
| 0.1 |
| 200 |
|
| 6 |
|
|
|
| 9 |
|
|
| DZ2 |
|
|
|
|
|
|
|
|
|
| 4 |
|
| ||
|
| 12/16V |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||||||
| 50V |
|
|
|
| 1 | 14 |
|
|
|
|
|
| 15V |
|
| +8V |
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
| X1 |
| X1 |
|
|
|
|
|
|
|
|
|
| J1 |
|
|
|
|
|
| |||||
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1W |
|
|
|
|
|
|
| 8 |
|
|
|
| ||||
|
|
|
|
|
|
| 7 |
|
|
|
| 8 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
| 3 |
|
|
|
|
|
|
|
|
| R12 |
|
|
|
|
|
|
|
|
|
|
| NOT USED |
|
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| J2 |
|
|
|
| ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
| 26.7K |
|
|
|
|
|
|
|
|
|
| 2 |
|
|
|
| |
|
|
|
|
|
|
|
|
|
| R20 |
|
|
|
|
|
|
|
| 10K |
|
|
|
|
|
| TO |
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| J2 |
|
|
|
|
| ||||
| X1 |
| R1 |
| C7 |
|
|
|
|
|
|
|
|
|
|
| C9 | R28 |
|
|
|
| 1 |
|
|
| ||||
|
| 681 |
|
|
|
| 47.5K |
|
|
|
|
|
|
|
|
|
|
|
| RHEOSTAT |
| |||||||||
|
|
|
|
|
|
|
| 10 |
|
|
|
|
| D6 |
|
|
|
|
|
|
|
|
|
|
|
| J1 | 200A |
| |
| LM2901 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Q4 |
|
|
|
|
|
| 5 |
|
| |||
|
|
|
|
|
|
|
|
|
|
|
| 1N4936 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||
|
| 12 |
|
| 39 | R4 | 31.6K | 11 | X1 |
|
| 13 | R10 | 18 | R11 | 5W |
|
|
|
| 1A |
|
|
|
|
| J1 |
| 203 |
|
|
|
|
|
|
|
|
|
|
|
| 100V |
|
|
|
|
|
|
| ||||||||||||
|
|
|
|
| C1 |
|
|
|
|
|
|
| C5 |
|
|
|
|
|
|
|
|
|
|
|
| 6 |
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
| 10V |
|
|
|
|
|
| 3.01K |
| 15V |
| .5 |
|
|
|
|
|
|
|
|
| TP1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 3300 |
| C8 |
|
|
| |||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| DZ4 |
|
|
| SNUBBER |
| |||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| R13 |
| 130V |
| ||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 5W |
| .05 |
|
|
| ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 15V |
|
| 38J |
|
|
| ||||
|
|
|
|
|
|
|
| 1N4936 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 600V |
|
| ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1W |
|
|
|
|
|
| 204 |
| ||||
+8V |
|
|
|
|
|
|
| D12 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| J1 | 1 |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||
| COM |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| COM |
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| J2 |
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
| Q3 |
| R18 |
|
|
|
|
|
|
|
|
| R16 |
|
| 3 |
|
| |
|
|
|
|
|
|
|
| 4 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||||
|
| R22 |
|
|
|
|
|
|
|
| 2N4401 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||||
|
|
|
|
|
|
|
| 2 |
|
|
| 162 |
|
|
|
|
|
|
|
|
| 150 |
|
|
|
|
|
| ||
|
| 51.1K |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
| X1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| C11 |
|
|
|
| R17 |
|
| CURRENT |
|
| |||
| R23 |
|
|
|
|
|
| 5 |
|
|
|
|
|
|
|
|
|
|
| DZ3 |
|
|
|
|
|
| ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| R14 |
| .47 |
|
|
|
|
|
|
| ||||||
|
|
| C13 |
| C12 |
|
|
|
|
|
|
|
|
|
| 1.50K |
| 50V |
| 10V |
|
| 150 |
|
| SENSE |
|
| ||
| 10K |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 5W |
|
| R26 |
|
|
|
|
|
| |||
|
| 0.1 |
| 18 | R25 | 22.1K |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||
|
|
|
| R29 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||
| 10K | R24 | 50V | 15V |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 150 |
|
| J2 |
|
|
| ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 4 |
|
| |||||||||
|
|
|
|
|
|
|
| 43.2K |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| R27 |
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
| COM |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
| GENERAL INFORMATION |
|
|
|
| 150 |
|
|
|
|
|
| ||||||
NOTES : | COM |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| LAST NO. USED | |||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||
|
|
|
|
|
|
|
|
|
|
|
| ELECTRICAL SYMBOLS PER E1537 |
|
|
|
|
|
|
|
|
| R- | 30 | |||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||||||||
N.A. | SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE |
|
|
|
|
| CAPACITORS = | MFD ( .022/50V | UNLESS OTHERWISE SPECIFIED) |
| LABELS | C- | 14 | |||||||||||||||||
| WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY |
|
| RESISTORS = Ohms ( |
| 1/4W UNLESS OTHERWISE SPECIFIED) |
|
| D- | 13 | ||||||||||||||||||||
| NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE |
| DIODES = | 1A, 400V | (UNLESS OTHERWISE SPECIFIED) |
|
|
|
|
| SUPPLY | VOLTAGE NET | ||||||||||||||||||
| NUMBER. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 10 |
|
|
|
| 6 |
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 4 |
| 3 |
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| POWER SUPPLY SOURCE POINT | ||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| J2 |
|
| MOLEX |
|
|
|
|
|
|
| COMMON CONNECTION | ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 2 |
| 1 |
|
|
|
|
|
|
| |||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| FRAME CONNECTION | ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
| FILE: | M17630_1BB |
|
| 5 |
|
| J1 | 1 |
| EARTH GROUND CONNECTION | ||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| WELDANPOWER 125 | |||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| SCHEMATIC - IDLER P.C. BOARD | ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| M 17630 |
Master to Return |
|
|
|
|
| TOC Master to Return |
|
|
|
|
| TOC Master to Return |
|
|
|
| ||||||||||||||
Section to Return |
|
|
|
|
| TOC Section to Return |
|
|
|
|
| TOC Section to Return |
|
|
|
|
TOC
TOC
PC | for | dia- |
|
|
|
| This |
|
|
board | Board Schematic is | PC board version. |
|
|
resulting | Printed |
| PC | WELDANPOWER125 |
for liabilities | factory warranty. This | applicable to your | information | |
Lincoln Electric assumes no | Board repairs will invalidate | reference only. It may not be | gram is intended to provide | |
NOTE: |
|
|
| |
Master to Return | ||||
Section to Return | ||||
evelresponsibilityfromltroubleshooting. | ourircuitrovidedyCp | otallypecifictmachine’ss | oardgeneralregardingbfunction. |