ALLEN & HEATH iDR-4 Operating and installation instructions

SERVICE INFORMATION
Publication AP5287
iDR-switch
24 IN 8 OUT SWITCH CONTROLLER

2idr-switch_ap5287_2.doc
Introduction
This publication provides technical information on servicing the iDR-switch logic expander for the
Allen & Heath iDR-8 digital mix processor. Included are system block diagram, internal layout
drawing and circuit schematics with board layouts and spare parts lists. Whilst we believe this
information to be reliable we do not assume responsibility for inaccuracies. We also reserve the
right to make changes in the interest of further product development.
Additional Resources
Allen & Heath web site www.allen-heath.com Product information
Technical downloads
Distribution contacts
Company contacts
Technical support [email protected] See web for local contact
Operating software iDR System Manager Download from web site
Helpfile
iDR-switch user guide AP5141 Operating instructions
Performance specification
iDR-8 user guide AP4530 iDR system overview
iDR-4 user guide AP5230 iDR system overview
iDR-switch Service Information
Issue status: idr-switch_ap5287_2.doc
Print date: 17 March 2004
Copyright © 2004 Allen & Heath. All rights reserved
Manufactured in the United Kingdom by Allen & Heath
Kernick Industrial Estate, Penryn, Cornwall, TR10 9LU, UK
http://www.allen-heath.com

idr-switch_ap5287_2.doc 3
Servicing Precautions – General Notes
Service personnel: Service work should be carried out by technically qualified service personnel only.
Mains power is dangerous and can kill. Do not attempt to work on a linear or switched
mode power supply if you are not suitably qualified to do so. Do not attempt to repair
surface mount circuit assemblies unless you are suitably qualified and have the
necessary facilities to do so. Replacement circuit assemblies can be ordered.
Service facilities: Ensure a suitably sized work surface is available. Ensure this is clear of dirt, debris
and obstructions which may damage the equipment surfaces. Ensure adequate
lighting. Use the correct tools for the job and ensure they are in good working order.
Ensure all workshop safety requirements are adhered to.
Service information: Check that you have all the information you need before starting the service job. Refer
to the Allen & Heath web site or contact Allen & Heath technical support for details on
the latest information. Full technical information can be downloaded from the web site
Distributor Zone (password required).
Mains power: Connect the equipment to mains power only of the type described in the user guide
and marked on the rear panel. The power source must provide a good ground
connection. Ensure you always use an isolation transformer when working on any
mains power supply unit.
Mains cord and fuse: Use the correct power cord as supplied with the equipment. Do not remove or tamper
with the ground connection in the power cord. Heed the Important Mains Plug Wiring
Instructions printed in the user guide if it is necessary to rewire the mains cord.
Always replace the equipment mains fuse with the correct type and rating as
described in the user guide and marked on the equipment panel.
Opening the unit: Switch off and remove the mains power cord before opening the equipment. Ensure
all power supply covers and safety shields are in place before applying power with the
unit open for diagnostic fault finding.
Closing the unit: Before finishing, check the quality and accuracy of the service work carried out.
Remove any dirt or debris as this may cause equipment failure in the future. Ensure all
assemblies, harnesses and connectors are correctly aligned and plugged in. Ensure
that jumper settings and control configurations are correctly set according to the
requirements of the customer.
Testing the unit: Before operating the equipment, read and adhere to the Important Safety Instructions
printed in the user guide. Test that the service work has been successfully carried out.
Shipping the unit: Use adequate packing such as the original packaging or purpose designed flight case
if you need to ship the unit. To avoid injury to yourself or damage to the equipment
take care when lifting, moving or carrying the equipment.
Servicing Notes – iDR-switch
User maintenance: There are no user serviceable parts inside. It should not be necessary for the user to
remove the cover or access internal parts.
Technology: The iDR-switch uses conventional thru-hole PCB technology. It has a built-in
universal mains input, switched mode power supply which should be serviced by
suitably qualified personnel only.
Operation: The iDR-switch is an add-on control expander that works with the iDR-8 and iDR-4
digital audio mix processors. To test the unit it should be connected as described in
the user guide. It is configured using the Allen & Heath iDR System Manager software
running on a PC connected to the main iDR unit.
Fault finding: The iDR-switch can be custom wired to a variety of switches, indicators, relays and
interface circuits by the installer. Although it has protection built in, it is possible that
the opto-isolated input and output stages may be damaged in cases of severe user
abuse. If a fault is suspected, check that the equipment it normally connects to works
within the operating specification of the unit.

4idr-switch_ap5287_2.doc
Contents Log
Internal Layout drawing ........................................... idr-switch_layout_1.pdf
Surface and Main Parts..............................................idr-switch_parts_1.pdf
System Block Diagram ................................idr-switch_blockdiagram_1.pdf
Pcb Assembly ............................................idr-switch_003-014_pcb_5.1.pdf