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F-4

TROUBLESHOOTING & REPAIR

F-4

 

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

 

 

 

 

PROBLEMS

 

POSSIBLE AREAS OF

RECOMMENDED

 

 

(SYMPTOMS)

 

MISADJUSTMENTS(S)

COURSE OF ACTION

 

 

 

 

 

 

 

WIRE FEEDING PROBLEMS

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The wire feeds whenever the input power switch is in the “ON” position.

1.Check the “Start” switch (S5). Make sure it is not stuck closed.

2.Check the “Inch Down” switch (S4). Make sure it is not stuck closed.

3.Check the “Inch Up” switch (S3) Make sure it is not stuck closed.

4.Check to make sure that jumper lead #693 is connected to the proper pin on the logic board. See wiring diagram.

1.Check light 7B on the logic board. It should NOT be on. If light 7B is ON remove lead #518A from the “Start” switch. If the light remains ON the logic board may be faulty. If the light goes OFF check the switch and associated leads.

See wiring diagram and Figure F.1.

2.Check light 7J on the logic board. It should NOT be on. If light 7J is ON remove lead #592 from the “Inch Down” switch. If the light remains ON the logic board may be faulty. If the light goes OFF check the switch and associated leads. See wiring diagram and Figure F.1.

3.Disconnect lead #586 from the “Inch Up” switch. If the problem is resolved check the switch and associated leads. See wiring dia- gram.

4.Check lights 7B, 7J and 7E. They should all be OFF. If lights 7B and 7J are OFF and light 7E is ON the logic board may be faulty. See Figure F.1.

5.Disconnect plug “A” from the logic board. If the wire feed stops the logic board may be faulty. See Figure F.1.

6.If the feed does not stop with plug “A” disconnected, disconnect plug “E” from the logic board. If the wire feed stops with plug “E” dis- connected the logic board may be faulty. If the wire feed does NOT stop with plug “E” disconnected the power board may be faulty. Replace. See Figure F.1.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call 216-383-2531 or 1-800-833-9353.

NA-5

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Lincoln Electric NA-5NF, NA-5SF service manual Possible Areas, Symptoms

NA-5S, NA-5N, NA-5SF, NA-5NF specifications

The Lincoln Electric NA-5NF, NA-5SF, NA-5N, and NA-5S are advanced welding helmets that are pivotal in enhancing the safety and efficiency of welders in various applications. These models are designed to provide exceptional protection and visibility, making them indispensable tools in the welding industry.

One of the main features of the NA-5 series is the auto-darkening filter technology. This feature allows the helmet to automatically adjust its shade based on the intensity of the arc. As the welder strikes an arc, the lens darkens instantaneously, shielding the eyes from harmful rays generated during the welding process. This functionality not only ensures safety but also enhances productivity, as welders do not need to manually flip the helmet up and down.

The helmets are equipped with a wide viewing area that allows for better visibility and precision while working. With a large lens, welders can easily monitor their work and surrounding environment, minimizing the risk of accidents. Additionally, the lightweight design of the NA-5NF, NA-5SF, NA-5N, and NA-5S provides comfort during extended periods of use, reducing neck strain and fatigue.

The NA-5 series is also well-regarded for its durability. Constructed from impact-resistant materials, these helmets can withstand the rigors of demanding work environments. This durability extends the lifespan of the helmet, making it a cost-effective investment for both professional and hobbyist welders.

Another notable characteristic is the adjustable sensitivity and delay settings found in certain models. These settings allow the user to customize the helmet based on their specific welding conditions. For instance, a welder can increase sensitivity for low-amperage tasks or adjust the delay to allow for a smoother transition from dark to light after completing a weld.

Furthermore, the helmets come with a reliable battery life, ensuring that they can be used for long periods without interruption. Some models also feature solar assist functionality, which helps recharge the auto-darkening filter, enhancing their overall efficiency.

In summary, the Lincoln Electric NA-5NF, NA-5SF, NA-5N, and NA-5S welding helmets represent a significant advancement in personal protective equipment for welders. Their combination of auto-darkening technology, wide viewing area, lightweight design, durability, and customizable settings makes them an excellent choice for anyone engaged in welding tasks. With these helmets, users can achieve greater safety and efficiency in their work, enabling them to focus on their craft with peace of mind.