LX770 - Video projector BENQ - Free user manual and instructions
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| Type | Video Projector |
| Brand | BenQ |
| Model | LX770 |
| Display Technology | DLP |
| Resolution | XGA (1024 x 768) |
| Brightness | 4000 ANSI Lumens |
| Contrast Ratio | 20000:1 |
| Light Source | Laser (20,000 hours) |
| Dimensions (W x H x D) | 410 x 164 x 450 mm |
| Weight | 8.5 kg |
| Power Consumption | 350W (Normal), 280W (Eco) |
| Noise Level | 34 dB (Eco mode) |
| Input Ports | HDMI x2, VGA x2, Composite, S-Video, Audio |
| Output Ports | VGA, Audio, USB (Service), RS-232 |
| Keystone Correction | Vertical ±30°, Horizontal ±30° |
| Zoom Ratio | 1.5x |
| Maintenance | Clean air filter every 5000 hours; replace filter as needed |
| Safety | Laser Class 2; avoid direct eye exposure |
| Spare Parts | Air filter (model F0000001), remote control (model RCE017) |
| General Information | USB display, network control via Crestron/AMX, 360-degree projection |
Frequently Asked Questions - LX770 BENQ
What is the native resolution of the BenQ LX770?
The BenQ LX770 has a native XGA resolution of 1024 x 768 pixels, ideal for business presentations and educational use.
How do I clean the air filter?
Turn off the projector and unplug it. Remove the filter cover, take out the filter, and gently vacuum or wash it with water. Let it dry completely before reinstalling. Clean every 5000 hours of use.
Can I connect my laptop via HDMI?
Yes, the LX770 has two HDMI ports that support HDMI 1.4a. Simply connect your laptop using an HDMI cable and select the correct input source.
What should I do if the projector does not turn on?
Check that the power cable is securely connected and the power outlet is working. Ensure the main power switch on the projector is turned on. If the LED indicator remains off, contact support.
How do I adjust the keystone correction?
Press the Keystone button on the remote or control panel. Use the arrow keys to adjust vertical and horizontal keystone up to ±30 degrees. Fine-tune until the image is rectangular.
Is the light source replaceable?
The LX770 uses a laser light source rated for 20,000 hours. It is not user-replaceable; contact BenQ service for replacement when needed.
Does it support 3D content?
Yes, the projector supports DLP Link 3D from HDMI sources. You need compatible 3D glasses and a 120Hz refresh rate source.
What resolutions are supported via VGA?
VGA supports resolutions up to 1920 x 1200 (WUXGA). The projector scales all inputs to its native XGA resolution.
Can I control the projector over a network?
Yes, the LX770 has RS-232 and an RJ45 port for network control. It supports Crestron, AMX, and PJLink protocols.
How do I reset the filter counter?
After cleaning/replacing the filter, go to the System Setup > Filter Counter menu and select Reset. Confirm to reset the counter to zero.
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