ALLEN & HEATH PL-12 Operating and installation instructions

SERVICE INFORMATION
Publication AP6507
PL-12
WALL PLATE for GR2

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Introduction
This publication provides technical information on servicing the Allen & Heath PL-12, a remote
control wall plate for the GR2 Audio Zone Mixer. Included are internal layout drawing and circuit
schematics with board layouts and spare parts drawings. 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
PL-12 user guide AP6506 Operating instructions
PL-5 user guide AP5196 Operating instructions
GR2 user guide AP6320 Operating instructions
PL-12 Service Information
Issue status: pl-12_ap6507_1.doc
Print date: 29 March 2006
Copyright © 2006 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

pl-12_ap6507_1.doc 3
GR2 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 mains powered equipment to mains power only of the type described in its
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 – PL-12
User maintenance: The PL-12 has various jumper and menu options which can be configured by the user.
Please refer to PL-12 user guide AP6506 for details. It should not be necessary for
the user to remove the PCB assemblies to set these options.
Technology: The PL-12 uses 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.
Battery: The PL-5 infra-red remote controller may be used with the PL-12. This device contains
a battery. There is a danger of explosion if the battery is incorrectly replaced. Only
replace the battery with a Lithium CR2025 or equivalent. Using a different battery,
recharging or disassembling the battery may present the risk of fire or explosion.
Dispose of used batteries promptly according to the manufacturer’s instructions. Keep
all batteries away from children.

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Contents Log
PL-12 and PL-5 Internal Layout/Parts drawing..............pl12-5_layout_1.pdf
PL-12 Front Panel PCB Assembly .............. pl12_003-081_frontpanel_3.pdf
PL-12 Processor PCB Assembly ................ pl12_003-559_processor_1.pdf
PL-12 User Guide.................................................... pl-12_ug_ap6506_1.pdf