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TROUBLESHOOTING | ||
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GROUND TESTS
CAUTION
This machine is equipped with
A.Prior to the ground test always turn the engine off and remove the two Printed Circuit boards mounted on the rear of the welder control panel. For access remove the welder roof and the metal enclosures over the PC boards. Remove one screw from the smaller board and two screws from the larger board and pull each board straight out from the connector block. There are no wires to disconnect.
B.Connect the following jumpers:
1.Welding generator frame to base.
2.Across D13 (#232 to #1)
3.Across D14 (#234 to #75).
C.Place jumpers across the following points, see wiring diagram.
1.Across the voltmeter terminals if the unit is so equipped.
2.Positive side of SCR bridge (#75) to #214 on the SCR bridge located on the rear panel of the control box.
3.Positive side of SCR bridge (#75) to #212 on the SCR bridge.
4.Across C5 on the SCR bridge.
5.Negative side of the SCR bridge (brown generator field lead) to #214 on the SCR bridge.
6.Negative side of the SCR bridge to #212 on the SCR bridge.
7.Across C6 on the SCR bridge.
8.#1 on the two diode aluminum finned heat sink to #212 on the SCR bridge.
9.#1 on the two diode aluminum finned heat sink to #213 on the SCR bridge.
10.#2 on the base of D4, single diode mount- ed on copper heat sink to #75 on SCR bridge.
11.Across each of the
NOTE: All jumpers must be as short as possible