ALLEN&HEATH AR84 AR2412 service manual_1 4
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 line-
ar 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 as-
semblies 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 re-
wire 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.
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