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| TROUBLESHOOTING & REPAIR | |
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| POWER SUPPLY TEST (continued) | |
| TEST PROCEDURE | 5. | Turn the engine off. |
| 1. Turn the engine off. | 6. | Using the Case Cover Removal and |
Replacement Procedure, install the control
2. Perform the Case Cover Removal and | panel and side panels on the machine. | |
Replacement Procedure and tilt the control | ||
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panel out. |
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WARNING
ELECTRIC SHOCK CAN KILL.
•Do not touch electrically live parts such as output termi- nals or internal wiring.
•Insulate yourself from the work and ground.
•Always wear dry insulating gloves.
3.Start the machine.
4.Using a voltmeter, measure the following sup- ply voltages at the designated points. See Table F.4.
Table F.4
SUPPLY VOLTAGE | MEASURED AT: | FUNCTION AFFECTED | CHECK/REPLACE |
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+12VDC control | J2 pin 3 to 2 @ control bd | ||
+12VDC control | J1 pin 4 to 1 @ control bd | ||
+12VDC control | J5 pin 4 to 1 @ engine prot. bd | ||
30VAC control | J12 pin 1 to 2 | @ LT chopper bd | |
30VAC control | J13 pin 1 to 2 | @ RT chopper bd | |
42VAC control | J3 pin 1 to 9 | @ control bd | |
+12VDC control | J9 pin 4 to 5 | @ display bd | |
+12VDC Battery | J9 pin 1 to 2 | @ display bd | |
| (run/stop on) |
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Weld output/display output
Idler control
Idler control
Weld output
Weld output
Weld output
Display output (if so equipped)
Display output (if so equipped)
Control board
Control board
leads 108, 109/cont. bd
leads 15, 16
leads 13, 14
leads 17, 18
leads 106, 107/cont. bd
leads 232, 232J, 5L, 5N, 5M/Battery
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Note: When checking leads for continuity or poor connection, remember to look closely for broken molex pins.
