Utility/Diagnostic Functions

Safe Mode Switch

Location of Safe Mode switch: The front panel has a small access hole on the left side, just left of the Power indicator. It is not labeled to help prevent accidental use. The Safe Mode switch can be operated by using a paper-clip (or similar item) inserted into the access hole and pushing.

Safe Mode: Use if the BASIS 914lz becomes inoperable (or behaves in completely unexpected ways) after updating firmware.

If the BASIS 914lz operates in an unexpected way or is not responding to any communications after a new firmware file is uploaded to it, it is likely the file was corrupted during transfer. If this occurs, there is a “backup” program in the BASIS 914lz that will enable you to communicate with it.

How to put the BASIS 914lz into Safe Mode:

1- Turn off the power to the BASIS 914lz by unplugging it from the AC outlet.

2- Depress the safe mode switch and keep it depressed while plugging the unit back in (power on).

3- The BASIS 914lz is now in “safe mode”. You may release the switch.

You should now be able to re-establish limited TCP/IP communications with the BASIS 914lz. Once communication has been re- established, the file transfer can be tried again or the old application file used until the source of the data transfer problem can be found. Also, QSControl.net WILL NOT communicate with the BASIS 914lz if it is in “safe mode”. You may communicate only using TFTP, Telnet, or RS-232.

RS-232 Serial Port I/O Interface

The RS-232 connector on the rear panel is used as a serial port input/output (I/O). This I/O port is used for accessing Ethernet/IP settings, stand alone control capabilities, system “health” data, firmware version information and other related data.

Should any system problems arise, the data that may be accessed through this interface can help to track down the problem. The most common items that might be used are “Display Network Settings” and “Enter Network Setup”. Many of the remaining selec- tions would typically be used for troubleshooting purposes along with a QSC technical representative prompting you to access par- ticular menu items so the data can be interpreted.

Connection is made using a normal serial cable between your computer’s serial port and the RS-232 port of the BASIS 914lz. Once properly connected, a “dumb-terminal” program (such as Hyper Terminal, a widely used version on most Windows-based PC’s) is started and communication established between the PC and the BASIS 914lz.

Following is the basic procedure for starting up Hyper Terminal, naming the connection, specifying the communications settings and an example of “what you should see” for a text-menu once the communications link has been established. If programs other than Hyper Terminal are used, you will need to follow your software’s instructions for establishing communications through your PC’s COM (serial) port.

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QSC Audio 914LZ manual Utility/Diagnostic Functions, Safe Mode Switch, RS-232 Serial Port I/O Interface
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914LZ specifications

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One of the standout features of the QSC 914LZ is its stunning audio performance. It utilizes a powerful 14-inch low-frequency driver paired with a robust 1.4-inch high-frequency compression driver. This combination ensures a balanced frequency response, optimized clarity, and impressive bass response, capable of filling large spaces with rich, detailed sound. The loudspeaker can handle high output levels without distortion, making it perfect for both music and speech applications.

The 914LZ also incorporates QSC's sophisticated Directivity Matched Transition (DMT) technology. This innovative design allows for smooth frequency response across the coverage area, reducing the common issues of uneven sound distribution. As a result, audiences can expect a consistent listening experience, regardless of their position in the venue.

Versatility is another key characteristic of the QSC 914LZ. The speaker offers multiple mounting options, including a standard pole mount, allowing for easy integration into various setups. Whether used as a standalone unit or part of a larger array system, the 914LZ adapts seamlessly to different configurations.

Durability is a top priority for QSC, and the 914LZ is built to withstand the rigors of professional use. It features a rugged enclosure made from high-quality materials, designed to endure the demands of touring and installation environments. Furthermore, the loudspeaker's components are engineered for long-lasting performance, ensuring that it maintains its audio fidelity over time.

Incorporating advanced DSP technology, the 914LZ can be fine-tuned for specific applications, providing users with greater control over sound shaping and EQ settings. This flexibility enables sound engineers to create the perfect audio experience tailored to the unique characteristics of any venue.

In summary, the QSC 914LZ is a powerful, versatile, and reliable loudspeaker that exemplifies the brand's commitment to quality and innovation in audio technology. With its impressive sound capabilities, smart design features, and rugged construction, the 914LZ is an excellent choice for professionals looking to elevate their sound experience in various settings.
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