ALLEN & HEATH iDR-8 Operating and installation instructions

SERVICE INFORMATION
Publication AP5286
iDR-in/out EXPANDERS
8 IN / 8 OUT AUDIO EXPANDERS

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Introduction
This publication provides technical information on servicing the iDR-in and iDR-out audio
expander units for the Allen & Heath iDR digital mix system. Included are internal layout drawings
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-in/out user guide AP4774 Operating instructions
Performance specification
iDR-8 user guide AP4530 iDR system overview
iDR-4 user guide AP5230 iDR system overview
iDR-in/out Service Information
Issue status: idr-inout_ap5286_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-inout_ap5286_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-in/out EXPANDERS
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-in/out expanders use SMT (surface mount) PCB technology. In certain cases
it may be better to replace a faulty assembly rather than try to fix it without the
appropriate tools and training. The power supply uses a built-in universal mains input,
switched mode circuit which should be serviced by suitably qualified personnel only.
Operation: iDR-in and iDR-out are optional add-on audio expanders that work with the iDR-8 and
iDR-4 digital audio mix processors. To test the units they should be connected as
described in the user guide. They are configured using the Allen & Heath iDR System
Manager software running on a PC connected to the main iDR unit.
Fault finding: To fully test the expander units it is necessary to connect them to the main iDR unit.
Check that the system settings are correctly configured before returning the units to
the installation.

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Contents Log
Internal Layout drawing ............................................. idr-inout_layout_1.pdf
Surface and Main Parts................................................ idr-inout_parts_1.pdf
Analog Input Pcb ...............................idr-inout_003-004_analoginput_1.pdf
Front PCB....................................... idr-inout_003-025_expanderfront_1.pdf
Input Comms PCB ................................. idr-inout_003-026_incomms_1.pdf
Output Comms PCB ............................idr-inout_003-027_outcomms_1.pdf
Power Supply PCB...........................idr-inout_003-028_expanderpsu_1.pdf
Analog Output PCB..........................idr-inout_003-029_analogoutput_2.pdf