LU9750 - Video projector BENQ - Free user manual and instructions
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| Product type | Video projector |
| Brand | BenQ |
| Model | LU9750 |
| Display technology | DLP laser |
| Native resolution | WUXGA (1920 x 1200) |
| Brightness | 10,000 ANSI lumens |
| Contrast ratio | 100,000:1 |
| Light source | Laser phosphor |
| Light source life | 20,000 hours (typical) |
| Lens options | Optional interchangeable lenses (sold separately) |
| Image size | 50\" to 300\" diagonal (approx.) |
| Keystone correction | Vertical and horizontal |
| Input ports | HDMI, DVI-D, VGA (D-sub), HDBaseT, 3G-SDI, LAN |
| Output ports | VGA monitor out, 3D sync |
| Control ports | RS-232, IR, LAN (RJ45) |
| Power supply | AC 100-240V, 50/60Hz |
| Power consumption | Max 885W (typical) |
| Dimensions (W x H x D) | 600 x 270 x 540 mm (approx.) |
| Weight | 25 kg (approx.) |
| Noise level | 40 dB (typical) |
| Operating temperature | 0°C to 40°C |
| Installation | Ceiling, table, 360° tilt |
| Maintenance | Air filter cleaning, laser module replacement |
| Security | Laser safety class 1, overheat protection |
| Spare parts and repairability | User-replaceable air filter and laser module; service parts available from BenQ |
Frequently Asked Questions - LU9750 BENQ
How do I clean the projector's air filter?
The air filter is located on the side or bottom. Turn off the projector and unplug it, then remove the filter cover and clean with a vacuum cleaner. Replace the filter if heavily soiled. Clean regularly every 1000 hours of use.
What are the power requirements for the BenQ LU9750?
The LU9750 accepts AC 100-240V, 50/60Hz. It consumes up to 885W in operation. Always use a grounded outlet and avoid power surges.
Can the LU9750 be mounted upside down for ceiling installation?
Yes, it supports ceiling mounting with an appropriate mount. The projector can be operated in 360° orientation, including upside down, thanks to laser cooling design.
How can I connect external speakers to the projector?
The LU9750 has audio out ports. Connect them to an amplified speaker system. For audio input, use the HDMI or VGA audio inputs.
What is the expected light source life of the LU9750?
The laser light source lasts up to 20,000 hours in normal mode, and longer in Eco mode. This reduces maintenance cost and downtime.
Does the LU9750 support HDBaseT for long cable runs?
Yes, it has an HDBaseT input that transmits HDMI over a single Cat6 cable up to 100 meters, ideal for large installations.
What should I do if the projected image is blurry?
First, adjust the focus ring on the lens. Make sure the projector is at the correct distance. If using a zoom lens, adjust zoom. Also clean the lens with a soft cloth.
Can I control the projector remotely over a network?
Yes, the LU9750 supports LAN control via RJ45. Use the RS-232 or IP protocol to integrate with Crestron, AMX, or other systems.
How do I replace the laser module?
The laser module is a user-replaceable part but requires qualified service. Turn off, unplug, and allow cooling. Remove the top cover and replace the module with an original BenQ spare. Contact support for guidance.
What is the recommended projection distance for a 100-inch screen?
For a 100-inch image, the distance depends on the lens. With a standard zoom lens, the throw distance is approximately 3 to 5 meters. Check the lens calculator on BenQ's website.
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USER MANUAL LU9750 BENQ
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Product information
Brand : BENQ
Model : LU9750
Category : Video projector