NEC Projector Iris Error and How to Fix It

Iris projector error is a common issue you can encounter while using a NEC projector. It can be very frustrating when facing this issue during a high-profile presentation. There are many reasons you are facing an iris error, and in many instances, there are easy solutions. But what should you do if you have an iris error on your NEC projector?

NEC projector Iris Error. Suppose you have an iris error on your NEC projector, it could be a result of a startup failure, a faulty connection, dust accumulation in your iris mechanism, mechanical breakdown of the iris mechanism, or high friction of metals in the iris mechanism. As much as the causes sound technical, it is possible to fix them yourself. You can correct this error by restarting your projector or examining loose or torn wires. Cleaning and lubricating the iris mechanism is an important fix. Changing some of the components of the iris mechanism can solve the problem. In some instances, you may have to change the whole iris mechanism.

The Iris mechanism is crucial for the proper functioning of the projector. In this article, I have outlined the causes of an iris error on your NEC projector and how to fix it. Even though it may seem too technical, by following the guidelines in this post, you can fix the problem.

NEC Projector Iris Error

Why is My NEC Projector Giving Me an Iris Error?

On NEC projectors, the iris error signal appears when the iris mechanism isn’t functioning properly. The mechanism uses open and closed blades to regulate how much light is projected onto the screen. While throwing dazzling whites, it fully opens; when creating the deepest shadows, it is closed.

The iris may cease moving altogether or experience irregular movement if the mechanism is broken. The projector then notices the problem and delivers an error message. The status light on the projector then changes to red and blinks nine times.

There are tons of reasons why the iris mechanism would break down. Let us take a look at some of the common ones:

Startup Failure

During startup, your NEC projector may have a brief system failure. If the projector software does not load properly, this could occur.

Faulty connection

If you are seeing this error, it is possible that you haven’t connected some wires in the projector properly. If you have previously opened the projector, check the wire connections and the port connections inside. 

For instance, you could have unintentionally cut the iris connection. And because it cannot identify the iris, the projector will report an error when you turn it on.

Dust Accumulation in the Iris Mechanism

The iris mechanism’s normal operation may be hampered if dust builds up in the component. The issue can be resolved by cleaning the iris.

Higher Friction in the Iris Mechanism

The friction created when the metal components of the iris mechanism rub against one another during use may make the iris less functional. Movement may finally stop when the friction increases, causing the projector to detect an iris error.

Mechanical Breakdown

The iris is a moving portion with wear-and-tear-prone sections that might malfunction. Mechanical problems unrelated to normal wear might also cause the malfunctioning of components like the motor and gear. The device will stop functioning in both cases.

How to Fix Iris Error on NEC Projector?

After troubleshooting the iris error on your projector, try out the following solutions:

Energy Cycle Using a projector

Restarting the projector may fix the issue if the iris fault was a short-term malfunction brought on by a system failure at startup.

Examine the Connections

Open the projector and check for any loose wires. Unplug the projector from the power source before taking it apart. If the iris cable is loose reattach it to the connection.

Iris mechanism cleaning and lubrication

To get to the iris unit, you must open the projector. You should only do this if your warranty has run out; otherwise, you risk invalidating your warranty.

The lamp is directly near the iris mechanism, so you need to remove the motherboard from the NEC projector to access it. You may remove the iris from several models, like the PA500X, PA500U, and others, without raising the motherboard.

Follow the steps below to access your NEC projector’s iris compartment:

  • The projector should be turned off and unplugged from the power source.
  • Loosen the screws on the projector shell using a screwdriver.
  • Take the air filter out.
  • Raise the casing.
  • The motherboard’s lens cover sensor wire should be disconnected.
  • Take the casing off.
  • Verify if the iris can be accessed. A metal shield adjacent to the bulb should be visible.
  • Once you see the metal shield adjacent to the bulb, removing the motherboard is unnecessary because the iris is located directly underneath that shield.
  • You have to elevate the motherboard to reach the iris if you can’t see a metal shield or can only see a tiny section.
  • To flip the mainboard, disconnect the wires on each side of it.
  • LCD ribbons should be loosened.
  • Rotate the motherboard to the side after raising it. The motherboard should be moved from the back (side without wires) to the front (side with several cables and connections, including the lens).
  • Put a strong object under the motherboard for support. This will prevent the motherboard’s cables from stretching or breaking.
  • You should be able to get to the iris unit at this point.
  • Remove the metal shield by loosening the screws.
  • After that, take the iris unit apart.
  • Disconnect the motor PCB from the iris after removing the motor. The blades can then be removed by loosening the gear.
  • Use a microfiber cloth to remove debris and dust from the bigger areas. Use a compressed air duster to clean smaller, more difficult-to-reach areas.
  • Next, lubricate the moving components—the gear and blades—with a cotton swab soaked in lubricant.
  • Check each component for evidence of wear or damage. The iris error could result from several components that are malfunctioning if they are worn out or broken.
  • Turn on the projector after reassembling the apparatus.

Change the Gear

The gear is in charge of assisting the iris blades in movement. The iris mechanism will stop working if the gear breaks.

Try using your thumb to turn the gear wheels to see whether they move. To find out if the gears on your projector model are changeable, get in touch with NEC Support. If they aren’t removable, you might have to replace the complete iris unit.

Change the Motor

If you have a spare motor, this will go quite easily. You can also order one online or from a nearby electronics store.

This choice will function best if your NEC projector is past the warranty period. Keep in mind that you are replacing an original part. Your dealer might view this as a significant modification that voids your warranty.

Contact NEC’s customer support team for guidance on what to do next. They may ask you to send it in for repair, send a new device, or suggest you seek your technician’s assistance. Everything is subject to the Terms & Conditions outlined when you purchased the projector.

Change Your Iris Unit

The iris unit can be changed if nothing is working. You may purchase a new or used iris to swap out the malfunctioning one in your projector for a unit whose warranty has expired.

If you need more advice on where to get a replacement part, you can contact NEC. They can fix the gadget for you or send you a replacement one.

This video takes about the NEC Iris dissemble and fixing errors.

Final Thoughts

If you are getting an iris error, follow my provided solutions. If everything stays the same even after changing the iris, the problem could be too complicated to tackle alone. In such a scenario, contact NEC’s support on what to do. You may have to buy a new projector if the problem is beyond repair.

If your projector’s warranty is still valid, do not attempt to take apart the projector; contact NEC and ask for guidance on what to do. They will send you a new device if the problem is too complicated.

If you want to fix the problem, take care not to cause additional damage to your device. If none of the solutions works, you can seek the assistance of a technician.


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