ALLEN & HEATH ZED 12FX - Service Manual

ALLEN&HEATH ZED 2 bus FX service manual AP7232_2 Page - 1 - of 11
ALLEN&HEATH
SERVICE MANUAL
Copyright © 2008 Allen & Heath Limited. All rights reserved
Allen & Heath Limited
Kernick Industrial Estate, Penryn, Cornwall, TR10 9LU, UK
http://www.allen-heath.com
ZED 2 bus F
X

Summary

Limited One Year Warranty

Conditions of Warranty

Details the terms and conditions for warranty claims, including proper installation and repair by authorized agents.

Release Notes

Development Changes

Servicing Precautions and General Notes

Parts Identification

How to Order Parts

Instructions on how to order replacement parts through distributors or service centres.

Exterior Parts

Identifies and labels external components of the ZED 2 bus FX mixer, including knobs, sockets, and mouldings.

Interior Parts

Identifies and labels internal components and PCBs of the ZED 2 bus FX mixer, such as PCBs and assemblies.

Screws

Lists and illustrates different types of screws used in the ZED 2 bus FX mixer assembly, specifying their locations.

Specification

Overview

This document serves as a service manual for the ALLEN&HEATH ZED 2 bus FX mixer, covering both the ZED 12FX and ZED 22FX models. It provides essential information for servicing, maintenance, and understanding the device's components and operational aspects.

The ZED 2 bus FX mixer is a professional audio mixing console designed for a wide range of applications, from live sound reinforcement to studio recording. Its primary function is to combine multiple audio signals, process them, and route them to various outputs. The "2 bus FX" designation indicates its capability to manage two main output buses (typically left and right stereo) and integrate built-in effects processing, enhancing the audio signals with various digital effects. The mixer features a comprehensive set of inputs, including mono channels with XLR and line inputs, stereo line inputs, and insert points for external processing. Each channel typically includes gain control, equalization (EQ) for tone shaping, auxiliary sends for monitoring or external effects, and pan/balance controls for stereo imaging. The integrated effects section allows users to apply reverbs, delays, and other time-based effects directly within the mixer, eliminating the need for external effects units in many scenarios. The mixer also includes master section controls for overall output levels, headphone monitoring, and routing to alternative outputs. USB connectivity is a key feature, enabling the mixer to interface with computers for recording stereo mixes or playing back audio, making it a versatile tool for modern audio workflows.

For usage, the ZED 2 bus FX mixer offers intuitive controls and a logical layout designed for ease of operation by both experienced audio engineers and novices. The mono channels are equipped with high-quality microphone preamplifiers, suitable for a variety of microphones, and include phantom power for condenser microphones. The EQ section on each channel allows for precise tonal adjustments, helping to shape the sound of individual instruments or vocals. Auxiliary sends provide flexibility for creating monitor mixes for performers or routing signals to external effects processors, even when the internal effects are in use. The master section provides clear visual feedback through LED meters, allowing users to monitor output levels and prevent clipping. The built-in effects engine is accessible via dedicated controls, offering a selection of algorithms and parameters to customize the sound. The USB audio interface simplifies recording and playback, making it easy to capture live performances or integrate computer-based audio into a mix. The robust construction and clear labeling of controls contribute to reliable and straightforward operation in various environments.

Maintenance of the ZED 2 bus FX mixer is detailed in the service manual to ensure its longevity and optimal performance. The manual emphasizes that service work should only be carried out by technically qualified personnel due to the dangers of mains power and the complexity of internal circuitry. It provides guidelines for safe servicing, including precautions when working with power supplies and surface mount components. For parts identification, the manual offers detailed diagrams of both exterior and interior components, along with part numbers for ordering replacements. This includes knobs, faders, switches, and various internal circuit board assemblies such as the master PCB, mono input PCBs, stereo input PCBs, effects PCBs, USB module, and power supply unit (PSU) assembly. The manual also identifies the types and locations of screws used throughout the unit, which is crucial for disassembly and reassembly. When ordering parts, users are directed to contact their local distributor or an appointed service center. Before and after any service work, the manual stresses the importance of checking all connections, ensuring proper alignment of assemblies, and verifying jumper settings and control configurations. Regular cleaning to remove dirt and debris is recommended to prevent future equipment failure. The warranty information outlines conditions under which repairs are covered, highlighting the importance of proper installation, operation, and authorized servicing. For fault finding, tracing the signal flow through the circuit path using the system block diagram is recommended, and replacement circuit assemblies are available from Allen & Heath.

ALLEN & HEATH ZED 12FX Specifications