The Allen & Heath Xone:42 is a professional DJ mixer designed for club performance, offering a comprehensive set of features for audio mixing, effects processing, and monitoring. This service manual, identified by part code AP7207 and issue I, provides technical information for servicing the device, including block diagrams, internal layouts, circuit schematics, and parts identification.
Function Description:
The Xone:42 serves as a central hub for multiple audio sources in a DJ setup, allowing for seamless mixing, equalization, and effects application. It features four stereo input channels, a dedicated microphone input, and a USB audio interface for integration with computers. The mixer incorporates Allen & Heath's renowned VCF (Voltage Controlled Filter) system, a 3-band EQ with a "total kill" feature on each channel, and a replaceable crossfader. The X:FX send/return loop allows for external effects processing, which can be routed through the VCF system. Monitoring capabilities include a comprehensive cue system with split cue and cue active indicators, as well as separate booth and record outputs.
Important Technical Specifications:
The Xone:42 boasts impressive audio performance characteristics suitable for professional use.
- Nominal / Max Output Levels:
- Main Mix: +4dBu nominal, +27dBu maximum
- Booth: 0dBu nominal, +22dBu maximum
- X:FX Send: 0dBu nominal, +20dBu maximum
- Record Out: -10dBV nominal, +10dBV maximum
- Internal Headroom:
- Channels: +22dB
- Frequency Response: +/-0.5dB from 10Hz to 20kHz
- Distortion: < 0.03% THD+noise @1kHz
- Crosstalk: < -90dB inter-channel
- Mic EIN (22Hz-22kHz): -126dB (150 ohm source)
- Residual Noise:
- Mix 1: -94dBu
- Booth: -101dBu
- X:FX: -92dBu
- Rec: -95dBu
- Mix Noise:
- Mix 1: -80dBu (-84dB S/N)
- Booth: -84dBu (-82dB S/N)
- X:FX: -88dBu (-84dB S/N)
- Rec: -90dBu
- Channel Meters: Peak reading 9 LED, -20dB to +10dB
- Main Meters: Peak reading 9 LED, -20dB to +10dB
- Mic EQ: 2-Band, +/-12dB
- Channel EQs: 3-Band, +6dB / total kill
- Channel Faders: 60mm stereo VCA, < -90dB shutoff
- Crossfader: 45mm stereo VCA, replaceable
- Consumption: 30W max
The product complies with European Electro magnetic Compatibility directives 89/336/EEC & 92/31/EEC and European Low Voltage Directives 73/23/EEC & 93/68/EEC. It has been tested to EN55103 Parts 1 & 2 1996 for use in Environments E1, E2, E3, and E4.
Usage Features:
The Xone:42 is designed for intuitive operation in a live performance setting.
- Input Flexibility: Four stereo input channels support both line and phono sources, with channels 1 and 4 offering RIAA preamps for turntables. A USB audio interface allows for two-way audio streaming with a computer, enabling digital DJing or recording.
- VCF Filter System: Each channel can be routed to the VCF filter, which offers HPF (High Pass Filter), BPF (Band Pass Filter), and LPF (Low Pass Filter) modes with adjustable frequency and resonance. The filter can also be applied to the X:FX return.
- X:FX Send/Return: A dedicated send and return loop allows for the integration of external effects units. The wet/dry mix of the X:FX can be controlled per channel.
- Comprehensive EQ: Each stereo channel features a powerful 3-band EQ with a "+6dB / total kill" characteristic, allowing for precise frequency manipulation and creative mixing.
- Smooth Faders: 60mm VCA-controlled channel faders provide smooth and accurate level control with excellent shutoff characteristics (< -90dB).
- Replaceable Crossfader: The 45mm VCA-controlled crossfader is replaceable, extending the life of the mixer and allowing for customization. The crossfader curve is adjustable, catering to different mixing styles.
- Monitoring: A robust cue system allows DJs to pre-listen to any channel or the X:FX return. The "split cue" function enables simultaneous monitoring of the master output and the cued channel. Dedicated headphone outputs (1/4" and 3.5mm) are provided.
- Output Options: Balanced XLR main mix outputs, unbalanced RCA record outputs, and balanced 1/4" booth outputs provide versatile connectivity for various sound systems and recording setups.
- Microphone Input: A dedicated microphone input with 2-band EQ and level control is included for MCs or announcements.
- User Configurable Jumper Links: The mixer includes internal jumper links that allow users to customize certain settings, as detailed in the user guide.
Maintenance Features:
The service manual provides essential information and precautions for maintaining the Xone:42.
- Servicing Precautions: Emphasizes that service work should only be carried out by technically qualified personnel. It highlights the dangers of mains power and advises against working on power supplies or surface mount assemblies without proper qualifications and tools.
- Service Facilities: Recommends a suitably sized, clean, well-lit work surface with correct tools and adherence to workshop safety requirements.
- Service Information: Directs technicians to the Allen & Heath website or technical support for the latest information and access to the Distributor Zone for full technical details.
- Mains Power and Fuse: Stresses the importance of connecting to the correct mains power type, using the supplied power cord, ensuring a good ground connection, and always replacing fuses with the correct type and rating. It also advises using an isolation transformer when working on mains power supply units.
- Opening and Closing the Unit: Provides instructions to switch off and remove mains power before opening the unit and to ensure all covers and shields are in place before applying power for diagnostic fault finding. When closing, it's crucial to check the quality of work, remove debris, and ensure all assemblies, harnesses, connectors, and jumper settings are correctly aligned and configured.
- Testing: Advises reading and adhering to safety instructions in the user guide and thoroughly testing the unit after service.
- Shipping: Recommends using adequate packing, such as original packaging or a purpose-designed flight case, to prevent damage during transit.
- SMT Technology: Notes that the XONE:42 uses Surface Mount Technology (SMT) for its PCBs. In some cases, replacing a faulty assembly may be more practical than attempting repairs without specialized tools and training.
- Built-in Switched Mode PSU: The power supply is a built-in universal mains input, switched mode circuit, which should only be serviced by suitably qualified personnel.
- Fault Finding: Recommends using the system block diagram and circuit drawings to trace signal paths during fault diagnosis. It specifies replacing faulty components only with Allen & Heath-specified parts to maintain performance. It also reminds to ensure RCA phono insert jumper links are fully pressed in if fitted.
The manual also includes a limited one-year warranty, covering defects in materials and workmanship, provided the equipment has been installed and operated according to instructions, not subjected to misuse or alteration, and serviced by authorized personnel. Fader wear and tear are not covered under warranty.
Need help?
General
To Next Page