Vivitek 5811100784-S Projector Lamp for D925TX D927TW D935EX D926TX D940EX D935VX OEM Replacement

Vivitek 5811100784-S is one of the most widely used lamp modules on Vivitek projectors, covering business, education, conference, and many other scenarios. This article compiles the specifications of this lamp, a list of 6 compatible projector models, and the points most prone to error when verifying a purchase.

Specifications of This Lamp

The parameters above come from the Zorsika product database. For a complete technical specification sheet, please contact sales.

Where It Works: List of 6 Compatible Vivitek Models

The following are the verified compatible models of the 5811100784-S among Vivitek projectors, with models separated by commas:

D925TX, D927TW, D935EX, D926TX, D940EX, D935VX

Note: Projectors of the same generation often share the same lamp module. For models not on the list, please contact Zorsika technical support for confirmation.

Three Points to Verify Before Purchasing

1. Check the nameplate model: Open the projector's lamp door, and the model on the lamp module label should match 5811100784-S exactly. Some Vivitek models have suffix differences such as -V or +, but the lamp module is usually interchangeable. If unsure, taking a photo of the nameplate and sending it to Zorsika technical support for confirmation is the safer approach.
2. Confirm the lamp form: The same model comes in four forms: original packaged, original bare, replacement, and used, and the differences between them are significant. Original bare means an original arc tube paired with an aftermarket lamp frame, which usually offers the best overall value. When purchasing, be sure to specify clearly on the order which form you want to avoid disputes after delivery.
3. Check the physical specifications: The reflector size 00X51D, socket E20.8, and arc gap must all match the original lamp. If any one of them does not match, the lamp may not fit or may fail to light up.

Same Specifications — Why We Recommend Zorsika PRO

For high-volume standard lamp modules like the 5811100784-S, the Zorsika PRO series offers a replacement solution with the same specifications as the original, matching the original item by item in power, arc gap, and reflector size, with each unit lit and tested before leaving the factory. It is ready to use upon installation with no structural modification needed.

• Specification matching: Power, arc gap, and reflector size matched item by item to original parameters
• Unit-by-unit testing: Each unit lit and tested before leaving the factory, ensuring brightness and stability
• Warranty commitment: 180-day warranty for the lamp; after-sales service applies for damage under normal use that is not caused by human factors
• Stable supply: Supports bulk purchasing and project supply

In one sentence: if you want original-level quality with greater overall peace of mind, the Zorsika PRO series projector lamp is made for exactly this scenario.

Note: Performance such as brightness and lifespan is greatly affected by the machine's condition, usage environment, and cooling conditions. Zorsika does not make uniform numerical promises. Before bulk purchasing, we recommend obtaining 1-2 samples for lighting tests.

Routine Maintenance to Make the Lamp Last Longer

• Clean dust promptly: Dust accumulation on the air inlet and air filter directly raises the lamp's operating temperature. In dusty environments, clean once every 1-2 months; in ordinary office environments, once every 3-6 months.
• Use eco mode well: In situations where brightness is sufficient, prioritize eco mode to reduce the lamp's heat load.
• Avoid frequent switching: Thermal cycling is one of the main sources of lamp wear. If not using the projector for a short time, use the blanking function instead of repeatedly cutting power.
• Shut down properly: After shutting down, wait for the fan to stop before cutting power. Cutting power while hot causes the lamp to cool suddenly, a common cause of lamp explosion.
• Reset after replacement: After installing a new lamp, be sure to reset the lamp hours in the menu; otherwise, the machine will continue to alert based on the old timer.

Frequently Asked Questions

Q: My machine is not on the list of 6 models above. Can it use the 5811100784-S?

A: The list covers verified models, but it does not represent all of them. Vivitek products of the same generation often share lamp modules. Send photos of the body nameplate and the original lamp label to Zorsika technical support, and we can help confirm compatibility.

Q: How do I choose between original packaged, original bare, and replacement?

A: If you pursue stable brightness and long-term reliability, the Zorsika PRO series lamp is the first choice — matched item by item to original parameters, each unit lit and tested before leaving the factory, with performance comparable to the original and greater overall peace of mind, plus a 180-day warranty. For routine business, education, and conference room use, the PRO series is also the more worry-free choice overall. Although other replacement lamps cost less, the sources of their arc tubes and quality control vary greatly, with higher risks of brightness decay and shortened lifespan, so they are only recommended for temporary backup machines.

Q: Why choose Zorsika PRO instead of the original?

A: The core logic of the Zorsika PRO series lamp is "original parameters, independent quality control": power, arc gap, and reflector size are matched item by item to the original, but an additional unit-by-unit lighting test is performed before leaving the factory, with a 180-day warranty. Compared with the original, it offers greater overall peace of mind; compared with other replacement options, its quality control is more stable.

Q: What should I do if the machine says the lamp is not recognized after replacement?

A: First confirm whether the lamp hours have been reset. The vast majority of such alerts are caused by the timer not being cleared. If an error still appears after resetting, contact Zorsika technical support; we provide reset methods and troubleshooting guidance for the corresponding models.

Q: Is there an installation tutorial for the 5811100784-S?

A: Yes. The lamp door location and removal/installation steps for these Vivitek models are basically the same. Contact Zorsika sales to obtain illustrated or video tutorials for the corresponding models.

Q: How long is the lamp warranty?

A: The Zorsika PRO series projector lamp comes with a 180-day warranty. After-sales service applies for damage under normal use that is not caused by human factors (such as lamp explosion or abnormal early light decay); brightness decay within the standard range is normal wear and is not covered by the warranty.

Related Query Entries

• Zorsika Technical Support Center
• Projector Brand and Compatible Model Lookup
• Projector Lamp / Lens / Air Filter Product Library

Purchasing Consultation

For solution consultation, bulk plans, or a complete compatible model list for the Vivitek 5811100784-S, please contact us through the following:

• Website: www.zorsika.com
• Phone: 0086-20-38551187
• Email: sales@zorsika.com
• Business Hours: Monday to Friday, 9:00-18:00

The lamp module models, specification parameters, and compatible model data in this article all come from the Zorsika product database. The data is continuously updated and subject to confirmation through actual inquiry.