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F-56

TROUBLESHOOTING & REPAIR

F-56

 

STATOR SHORT CIRCUIT & GROUND TEST (CONTINUED)

 

FIGURE F.13 - WELD CONTROL BOARD

 

 

AMPHENOL 1

GROUND

 

 

 

CONTACTOR

 

 

 

 

 

 

 

CONTROL

 

 

 

C

B

 

 

 

 

 

 

A

 

 

 

 

 

 

 

 

 

 

 

 

 

120 VAC FOR WIRE FEEDER

 

 

D

L

K

 

 

 

 

 

J

 

 

 

 

 

 

 

 

E

 

 

 

 

 

 

 

M

N

I

 

REMOTE

 

 

 

 

 

 

 

 

 

 

 

F

 

G

 

 

 

CONTROL

 

H

 

40 VAC FOR WIRE FEEDER

 

 

 

 

 

KEY

 

 

 

 

 

21 WORK SENSE

 

 

 

 

 

 

 

 

 

L4

 

 

 

 

 

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2 TIMES THRU FERRITE LEADS 75A, 76A, & 77A

TEST PROCEDURE

1.Perform Case Cover Removal Procedure.

2.Perform Capacitor Discharge Procedure.

3.Unplug anything that may be connected to the auxiliary receptacles or the 14 pin amphenol.

4.Disconnect and isolate GND-E lead from the bottom ground screw inside the left case front. See control Inner-Connection diagram. See Figure F.13.

5.Disconnect the #5 and #6 leads from the field bridge rectifier. See Wiring Diagram.

6.Using an ohmmeter, check the resistance between chassis ground and each of the fol- lowing points; Resistance should read very high, 500,000 (500K) ohms minimum.

1)Pin 1 at the 14 pin amphenol, and the #5 lead that had been disconnected from the ground screw. (this checks for a connection between the wire feed winding and the aux- iliary winding.)

2)Pin 1 of the 14 pin amphenol and lead #7 or #9. (This checks for a connection between the wire feed winding and the exciter wind- ing.)

3)Pin 1 of the 14 pin amphenol an lead W1, W2, or W3. (This checks for a connection between the wire feed winding and the weld winding).

4)Lead #5 and lead #7 or #9. (This checks for a connection between the auxiliary winding and the weld winding). See Wiring Diagram.

5)Lead #5 and lead W1, W2, or W3. (This checks for a connection the auxiliary wind- ing and the weld winding.) See Wiring Diagram.

6)Lead #7 or #9 and lead W1, W2, or W3. (This checks for a connection between the exciter winding and the weld winding.) See Wiring Diagram.

If any of the above readings is less than 500,000 (500k) ohms, check for damaged, contaminated, or shorted wiring or components between the test points and the stator winding. If necessary, dis- connect and isolate the stator leads as close to the stator winding as possible. See wiring diagram. If the low resistance is determined to be between the windings within the stator, the stator is defective and should be replaced*.

NOTE: The field bridge rectifier and field capacitor may appear to function normally when tested inde- pendently. But may malfunctions when placed under the stress of normal operation. For this rea- son, It is recommended that the bridge rectifier and capacitor be replaced with known good compo- nents before replacing the stator.

VANTAGE® 400

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Image 104
Lincoln Electric 400 service manual Figure F.13 Weld Control Board
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400 specifications

The Lincoln Electric 400 is a state-of-the-art multi-process welding machine designed to meet the demands of today’s industrial welding applications. Renowned for its reliability and versatility, this welder is a preferred choice among professionals in fabrication, construction, and maintenance industries.

One of the main features of the Lincoln Electric 400 is its multi-process capability. It seamlessly integrates MIG, TIG, and stick welding processes into a single unit, allowing users to switch between methods depending on the job at hand. This flexibility makes it incredibly suitable for a wide range of materials, including steel, stainless steel, and aluminum.

The welding machine boasts a robust power output, with a maximum range of 400 amps. This impressive capacity enables it to handle thick materials effectively, making it ideal for heavy-duty tasks. The machine operates on both single-phase and three-phase power, giving users the advantage of versatility depending on the power source available at the job site.

Another significant characteristic of the Lincoln Electric 400 is its advanced digital display and control interface. This user-friendly panel allows for easy adjustments to voltage and wire feed speed, ensuring precision and high-quality welds. Additionally, the machine includes built-in features to improve the consistency of welding, such as the Smart MIG technology which optimizes the welding parameters automatically based on the wire diameter and material thickness.

In terms of durability, the Lincoln Electric 400 is designed for rugged environments. Its heavy-duty construction, including a robust metal casing and protective features, ensures it can withstand the rigors of daily use in harsh conditions. Furthermore, the welder is often praised for its efficient cooling system, which prolongs the machine's lifespan and maintains optimal performance even during extended usage.

Portability is another key aspect of this welding machine. Weighing under 200 pounds, it is designed with mobility in mind. The integrated wheels allow for easy transportation between job sites, making it a practical choice for mobile welders and contractors.

In conclusion, the Lincoln Electric 400 stands out in the welding equipment market due to its multi-process capabilities, impressive power output, user-friendly interface, durability, and portability. It is engineered to exceed the expectations of professional welders, providing them with the tools needed for high-quality results across a variety of applications.
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