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ALLEN & HEATH ZED 428

ALLEN & HEATH ZED 428
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ALLEN&HEATH ZED 4 bus service manual AP7224 Issue 4 Page - 1 - of 11
ZED 420 ZED 428 ZED 436
ALLEN&HEATH
SERVICE MANUAL
Copyright © 2007 Allen & Heath Limited. All rights reserved
Allen & Heath Limited
Kernick Industrial Estate, Penryn, Cornwall, TR10 9LU, UK
http://www.allen-heath.com
ZED
4 bus

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ALLEN & HEATH ZED 428 Specifications

General IconGeneral
TypeAnalog
Channels28
Mic Inputs8
Line Inputs16
Stereo Inputs4
Aux Sends6
Subgroup Outs4
Matrix Outs2
Faders100mm
USBNo
Phantom PowerYes
EffectsNo
Headphone OutputYes
Monitor Outputs2
Weight12.5 lbs
EQ Bands3-band

Summary

Limited One Year Warranty

Conditions of Warranty

Specifies requirements for warranty claims, including proper usage and authorized repairs.

Development Changes

Servicing Precautions and General Notes

Service Personnel and Facilities

Requirements for qualified technicians and suitable working environments.

Service Information and Power Safety

Accessing technical data and critical mains power safety procedures.

Unit Opening and Closing Procedures

Safe methods for opening, servicing, and reassembling the equipment.

Operational and Maintenance Procedures

Testing and Shipping

Procedures for verifying service work and guidelines for safe transportation.

Operation and Fault Finding

Ensuring correct operation and methods for diagnosing equipment issues.

Parts Identification

How to Order Parts

Information on obtaining replacement parts through distributors or service centers.

Exterior Parts Identification

Visual guide to external components and their part numbers.

Interior Parts Identification

Internal Component Identification

Visual guide to internal circuit boards and modules with part numbers.

Screw Identification

Screw Types and Locations

Identification of specific screws used for panel, fader, side moulding, and base.

Specifications

Operating Levels

Details on nominal and maximum input/output levels for various channels.

Frequency Response

Technical data on the frequency response characteristics of the audio mixer.

THD+n

Information on Total Harmonic Distortion plus Noise for different signal paths.

Headroom and USB

Details on analogue headroom, USB connectivity, and audio codec specifications.

Noise Specifications

Measurements for mix noise and microphone pre-amplifier EIN.

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