The Extron System 4xi is a switcher series designed for managing and routing video and audio signals, particularly in conjunction with NEC projectors. This document outlines the installation, configuration, and connection procedures for the System 4xi with various NEC projector models, including NEC/Runco, NEC XG, NEC MT Series, NEC GT 2000, and NEC XT 5000. The core function of the System 4xi is to act as a central hub for multiple video and audio sources, allowing users to select and display them on a connected NEC projector.
Function Description:
The System 4xi serves as a projector communications kit, enabling seamless integration and control between multiple input sources and an NEC projector. It manages video and audio switching, ensuring that the correct signals are routed to the projector based on user selection. The system is designed to handle various video signal types, including RGBS/HV, and provides audio input and output capabilities. A key feature is its ability to communicate with NEC projectors to control input selection and other projector functions, simplifying the overall operation of a presentation or display system.
The System 4xi can operate as a host unit and can be expanded with peripheral switchers (like System 4 ARMX, System 6 ARMX, or System 10 Plus) to accommodate a larger number of input channels. This modularity allows for flexible system design, from smaller setups with a few inputs to larger, more complex installations requiring up to 22 channels (1 host looped to multiple System 10 Switchers).
Important Technical Specifications:
The kit includes several communications adapters, each designed for specific NEC projector models:
- 26-472-01 (ADP, UNV, “D”): Used for NEC XG and NEC/Runco projectors.
- 26-458-01 (ADP, NEC MT): Used for NEC MT Series projectors.
- 26-494-01 (ADP, UNV, “K”): Used for NEC GT 2000 projectors.
- 26-467-01 (ADP, UNV, “A”): Used for NEC host comm* (e.g., MT1045/1040, XT5000, VT440/540) and NEC GT 1150 projectors.
The System 4xi features a Main Controller Board with DIP switches (SW1: 1-2-3-4, SW2, SW3, SW4, SW5, SW6) that must be configured correctly for the specific NEC projector model. These switch settings determine the communication protocol and other operational parameters. For example, for NEC XG and NEC/Runco, SW1 is off on on off, and SW2-SW6 are 0 0 4 F 0 (for NEC XG) or 0 0 7 5 0 (for NEC/Runco). The projector cable connection also varies, with J9 used for NEC XG/Runco and J15 for NEC MT Series, GT 2000, and XT 5000.
Communication baud rates are specified for different projector types:
- NEC/Runco and NEC XG: PRJ BAUD = 9600
- NEC MT Series: PRJ BAUD = 9600
- NEC GT 2000: PRJ BAUD = 9600
- NEC XT 5000: PRJ BAUD = 38400
The system supports a maximum of 22 channels when configured with a host System 4xi and multiple System 10 Switchers as peripherals. The channel assignments are mapped to NEC projector slots (M01-M10 for host, S01-S10 for peripherals), allowing for organized input management.
Usage Features:
The System 4xi is designed for ease of use, with configuration primarily done through the front panel and internal DIP switches.
- Configuration Verification: Users can verify the current System 4xi configuration for the connected projector model using the "Information Menu" (Menu 8) on the front panel LCD screen. This displays crucial parameters like
PRJ (projector type), PRJ BAUD, UNIT No., and HST BAUD.
- DIP Switch Configuration: If the configuration is incorrect, users must access the Main Controller Board to adjust the SW1-SW6 DIP switches according to the provided tables for each projector model. This ensures proper communication and functionality.
- Cable Connections: The installation involves connecting the projector communications extension cable (CC 50') from the System 4xi's PJ Comm port to the NEC COM adapter, and then to the projector's remote control port. Video signals (RGBS/HV) are connected from the System 4xi output to the matching BNCs on the NEC connector panel.
- Power-Up Sequence: A critical usage feature, especially for NEC XG projectors, is the specific power-up sequence. AC power must be applied to the projector first, placing it in Stand-by mode, before applying AC power to the System 4xi. Failure to follow this sequence can lead to communication errors.
- Projector Input Level Setting: The projector itself needs to be configured to either "SW_Level 1" mode (for systems with less than 10 inputs) or "SW_Level 2" mode (for systems with 10 or more inputs). This setting dictates how the projector interprets input selection commands from the System 4xi.
- Channel Mapping: The System 4xi channel numbers correspond to the projector's "Group" numbers or input channels. Users can select inputs on the projector's remote (e.g., "Operate, 4 (Input Select)") to switch the System 4xi to the corresponding input channel.
- Modular Expansion: The ability to loop the System 4xi (host) to peripheral switchers (like System 10 Plus) allows for scalable input management, making it suitable for various installation sizes.
Maintenance Features:
The document highlights several important maintenance and troubleshooting aspects:
- Configuration Changes: Any changes to the DIP switch configurations on the Main Controller Board require the power to be removed at the AC cord and then restored for the changes to be detected by the System 4xi. This is a crucial step for ensuring new settings are applied.
- Cable Connection Verification: The manual emphasizes the importance of securing all connector screws for reliable connections. It also notes that if the Projector Cable is wrongly connected (e.g., to J15 instead of J9, or vice-versa), the Information Menu (Menu 8) on the System 4xi may not indicate the error, requiring manual verification of the connection diagram.
- Rack Mount Guidelines: For rack-mounted installations, it is explicitly stated that the weight of the cables should NOT be supported by the System 4xi itself. This guideline is critical for preventing damage to the unit and ensuring long-term reliability.
- Troubleshooting Communication Errors: The specific power-up sequence for NEC XG projectors is a key troubleshooting point. If communication errors occur, verifying this sequence is a primary step.
- Documentation Reference: The manual frequently directs users to refer to the projector's own documentation for further details on configuration and signal connection, indicating that a comprehensive understanding of both the System 4xi and the projector is necessary for proper maintenance and operation.
In summary, the Extron System 4xi is a specialized switcher designed to streamline the management of multiple video and audio sources for NEC projectors, offering robust configuration options, clear usage guidelines, and essential maintenance considerations to ensure reliable performance in various professional environments.
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